IT-arkitekt - Lediga jobb

At Avaron, you get the security of permanent employment combined with the variety of working at different customers. We place specialists across everything from tech, IT and industry to project management and business support – and whatever the assignment, you have a consultant manager who is there for you and your development.

You will join a backend team working on an API that delivers static and market data for financial instruments in a modern banking environment. The solution supports an investment app today and is designed to serve more retail channels over time, which means your work will sit close to both business value and end-user experience.

This is a role for you if you enjoy solving search-heavy backend challenges where performance really matters. OpenSearch is a central part of the platform, used not only for storage but as a search and ranking engine for finding, filtering, sorting and ranking instruments across multiple dimensions with high speed and low latency.

You will also work with the ingestion flow behind the API, where data from several external sources is collected, normalized and made ready for reliable use downstream. The focus is on building services that are trusted in production, shaped by customer needs and released continuously.

What makes this role especially interesting is the chance to influence a product where search quality, data accuracy and backend design directly support better investment decisions.

• You will build and improve backend APIs in Node.js and TypeScript for serving instrument and market data in production.
• You will design, tune and evolve OpenSearch-based search and ranking capabilities, including indexing strategy, complex queries, aggregations and performance optimization.
• You will develop data ingestion pipelines that combine, reconcile and normalize data from multiple external sources.
• You will work closely with the team to understand customer needs and turn them into solutions that create clear value.
• You will use TDD to shape code and system design, from unit tests to end-to-end flows with test containers that mirror live environments.
• You will contribute to a delivery setup with daily releases, where reliable CI outputs and production-ready quality are essential.

• Extensive hands-on experience and deep knowledge of OpenSearch or Elasticsearch, especially as a search and ranking engine rather than only as storage.
• Strong practical knowledge of indexing strategy, advanced query design, aggregations, multi-dimensional sorting and ranking, and performance tuning for low-latency workloads at scale.
• Solid hands-on experience with Node.js and TypeScript for building production APIs.
• Experience building data ingestion pipelines that combine and reconcile data from several external sources.
• Experience working with TDD in backend development, including automated tests across different levels.
• A strong interest in building solutions based on customer value and close collaboration within the team.

• Experience self-hosting and operating OpenSearch or Elasticsearch clusters.
• Interest in, or experience with, financial instruments, markets, key figures and financial analysis.
• Experience working in an agile way.

• Permanent employment at Avaron AB
• Occupational pension
• Wellness allowance of SEK 5,000 per year

Selections are made on an ongoing basis – apply as soon as you can.

At Avaron, you get the security of permanent employment combined with the variety of working at different customers. We place specialists across everything from tech, IT and industry to project management and business support – and whatever the assignment, you have a consultant manager who is there for you and your development.

You will join a backend team working on an API that delivers static and market data for financial instruments in a modern banking environment. The solution supports an investment app today and is designed to serve more retail channels over time, which means your work will sit close to both business value and end-user experience.

This is a role for you if you enjoy solving search-heavy backend challenges where performance really matters. OpenSearch is a central part of the platform, used not only for storage but as a search and ranking engine for finding, filtering, sorting and ranking instruments across multiple dimensions with high speed and low latency.

You will also work with the ingestion flow behind the API, where data from several external sources is collected, normalized and made ready for reliable use downstream. The focus is on building services that are trusted in production, shaped by customer needs and released continuously.

What makes this role especially interesting is the chance to influence a product where search quality, data accuracy and backend design directly support better investment decisions.

• You will build and improve backend APIs in Node.js and TypeScript for serving instrument and market data in production.
• You will design, tune and evolve OpenSearch-based search and ranking capabilities, including indexing strategy, complex queries, aggregations and performance optimization.
• You will develop data ingestion pipelines that combine, reconcile and normalize data from multiple external sources.
• You will work closely with the team to understand customer needs and turn them into solutions that create clear value.
• You will use TDD to shape code and system design, from unit tests to end-to-end flows with test containers that mirror live environments.
• You will contribute to a delivery setup with daily releases, where reliable CI outputs and production-ready quality are essential.

• Extensive hands-on experience and deep knowledge of OpenSearch or Elasticsearch, especially as a search and ranking engine rather than only as storage.
• Strong practical knowledge of indexing strategy, advanced query design, aggregations, multi-dimensional sorting and ranking, and performance tuning for low-latency workloads at scale.
• Solid hands-on experience with Node.js and TypeScript for building production APIs.
• Experience building data ingestion pipelines that combine and reconcile data from several external sources.
• Experience working with TDD in backend development, including automated tests across different levels.
• A strong interest in building solutions based on customer value and close collaboration within the team.

• Experience self-hosting and operating OpenSearch or Elasticsearch clusters.
• Interest in, or experience with, financial instruments, markets, key figures and financial analysis.
• Experience working in an agile way.

• Permanent employment at Avaron AB
• Occupational pension
• Wellness allowance of SEK 5,000 per year

Selections are made on an ongoing basis – apply as soon as you can.

At Avaron, you get the security of permanent employment combined with the variety of working at different customers. We place specialists across everything from tech, IT and industry to project management and business support – and whatever the assignment, you have a consultant manager who is there for you and your development.

You will join a backend team working on an API that delivers static and market data for financial instruments in a modern banking environment. The solution supports an investment app today and is designed to serve more retail channels over time, which means your work will sit close to both business value and end-user experience.

This is a role for you if you enjoy solving search-heavy backend challenges where performance really matters. OpenSearch is a central part of the platform, used not only for storage but as a search and ranking engine for finding, filtering, sorting and ranking instruments across multiple dimensions with high speed and low latency.

You will also work with the ingestion flow behind the API, where data from several external sources is collected, normalized and made ready for reliable use downstream. The focus is on building services that are trusted in production, shaped by customer needs and released continuously.

What makes this role especially interesting is the chance to influence a product where search quality, data accuracy and backend design directly support better investment decisions.

• You will build and improve backend APIs in Node.js and TypeScript for serving instrument and market data in production.
• You will design, tune and evolve OpenSearch-based search and ranking capabilities, including indexing strategy, complex queries, aggregations and performance optimization.
• You will develop data ingestion pipelines that combine, reconcile and normalize data from multiple external sources.
• You will work closely with the team to understand customer needs and turn them into solutions that create clear value.
• You will use TDD to shape code and system design, from unit tests to end-to-end flows with test containers that mirror live environments.
• You will contribute to a delivery setup with daily releases, where reliable CI outputs and production-ready quality are essential.

• Extensive hands-on experience and deep knowledge of OpenSearch or Elasticsearch, especially as a search and ranking engine rather than only as storage.
• Strong practical knowledge of indexing strategy, advanced query design, aggregations, multi-dimensional sorting and ranking, and performance tuning for low-latency workloads at scale.
• Solid hands-on experience with Node.js and TypeScript for building production APIs.
• Experience building data ingestion pipelines that combine and reconcile data from several external sources.
• Experience working with TDD in backend development, including automated tests across different levels.
• A strong interest in building solutions based on customer value and close collaboration within the team.

• Experience self-hosting and operating OpenSearch or Elasticsearch clusters.
• Interest in, or experience with, financial instruments, markets, key figures and financial analysis.
• Experience working in an agile way.

• Permanent employment at Avaron AB
• Occupational pension
• Wellness allowance of SEK 5,000 per year

Selections are made on an ongoing basis – apply as soon as you can.

At Avaron, you get the security of permanent employment combined with the variety of working at different customers. We place specialists across everything from tech, IT and industry to project management and business support – and whatever the assignment, you have a consultant manager who is there for you and your development.

You will join a backend team working on an API that delivers static and market data for financial instruments in a modern banking environment. The solution supports an investment app today and is designed to serve more retail channels over time, which means your work will sit close to both business value and end-user experience.

This is a role for you if you enjoy solving search-heavy backend challenges where performance really matters. OpenSearch is a central part of the platform, used not only for storage but as a search and ranking engine for finding, filtering, sorting and ranking instruments across multiple dimensions with high speed and low latency.

You will also work with the ingestion flow behind the API, where data from several external sources is collected, normalized and made ready for reliable use downstream. The focus is on building services that are trusted in production, shaped by customer needs and released continuously.

What makes this role especially interesting is the chance to influence a product where search quality, data accuracy and backend design directly support better investment decisions.

• You will build and improve backend APIs in Node.js and TypeScript for serving instrument and market data in production.
• You will design, tune and evolve OpenSearch-based search and ranking capabilities, including indexing strategy, complex queries, aggregations and performance optimization.
• You will develop data ingestion pipelines that combine, reconcile and normalize data from multiple external sources.
• You will work closely with the team to understand customer needs and turn them into solutions that create clear value.
• You will use TDD to shape code and system design, from unit tests to end-to-end flows with test containers that mirror live environments.
• You will contribute to a delivery setup with daily releases, where reliable CI outputs and production-ready quality are essential.

• Extensive hands-on experience and deep knowledge of OpenSearch or Elasticsearch, especially as a search and ranking engine rather than only as storage.
• Strong practical knowledge of indexing strategy, advanced query design, aggregations, multi-dimensional sorting and ranking, and performance tuning for low-latency workloads at scale.
• Solid hands-on experience with Node.js and TypeScript for building production APIs.
• Experience building data ingestion pipelines that combine and reconcile data from several external sources.
• Experience working with TDD in backend development, including automated tests across different levels.
• A strong interest in building solutions based on customer value and close collaboration within the team.

• Experience self-hosting and operating OpenSearch or Elasticsearch clusters.
• Interest in, or experience with, financial instruments, markets, key figures and financial analysis.
• Experience working in an agile way.

• Permanent employment at Avaron AB
• Occupational pension
• Wellness allowance of SEK 5,000 per year

Selections are made on an ongoing basis – apply as soon as you can.

At Avaron, you get the security of permanent employment combined with the variety of working at different customers. We place specialists across everything from tech, IT and industry to project management and business support – and whatever the assignment, you have a consultant manager who is there for you and your development.

You will join a backend team working on an API that delivers static and market data for financial instruments in a modern banking environment. The solution supports an investment app today and is designed to serve more retail channels over time, which means your work will sit close to both business value and end-user experience.

This is a role for you if you enjoy solving search-heavy backend challenges where performance really matters. OpenSearch is a central part of the platform, used not only for storage but as a search and ranking engine for finding, filtering, sorting and ranking instruments across multiple dimensions with high speed and low latency.

You will also work with the ingestion flow behind the API, where data from several external sources is collected, normalized and made ready for reliable use downstream. The focus is on building services that are trusted in production, shaped by customer needs and released continuously.

What makes this role especially interesting is the chance to influence a product where search quality, data accuracy and backend design directly support better investment decisions.

• You will build and improve backend APIs in Node.js and TypeScript for serving instrument and market data in production.
• You will design, tune and evolve OpenSearch-based search and ranking capabilities, including indexing strategy, complex queries, aggregations and performance optimization.
• You will develop data ingestion pipelines that combine, reconcile and normalize data from multiple external sources.
• You will work closely with the team to understand customer needs and turn them into solutions that create clear value.
• You will use TDD to shape code and system design, from unit tests to end-to-end flows with test containers that mirror live environments.
• You will contribute to a delivery setup with daily releases, where reliable CI outputs and production-ready quality are essential.

• Extensive hands-on experience and deep knowledge of OpenSearch or Elasticsearch, especially as a search and ranking engine rather than only as storage.
• Strong practical knowledge of indexing strategy, advanced query design, aggregations, multi-dimensional sorting and ranking, and performance tuning for low-latency workloads at scale.
• Solid hands-on experience with Node.js and TypeScript for building production APIs.
• Experience building data ingestion pipelines that combine and reconcile data from several external sources.
• Experience working with TDD in backend development, including automated tests across different levels.
• A strong interest in building solutions based on customer value and close collaboration within the team.

• Experience self-hosting and operating OpenSearch or Elasticsearch clusters.
• Interest in, or experience with, financial instruments, markets, key figures and financial analysis.
• Experience working in an agile way.

• Permanent employment at Avaron AB
• Occupational pension
• Wellness allowance of SEK 5,000 per year

Selections are made on an ongoing basis – apply as soon as you can.

At Avaron, you get the security of permanent employment combined with the variety of working at different customers. We place specialists across everything from tech, IT and industry to project management and business support – and whatever the assignment, you have a consultant manager who is there for you and your development.

You will join a backend team working on an API that delivers static and market data for financial instruments in a modern banking environment. The solution supports an investment app today and is designed to serve more retail channels over time, which means your work will sit close to both business value and end-user experience.

This is a role for you if you enjoy solving search-heavy backend challenges where performance really matters. OpenSearch is a central part of the platform, used not only for storage but as a search and ranking engine for finding, filtering, sorting and ranking instruments across multiple dimensions with high speed and low latency.

You will also work with the ingestion flow behind the API, where data from several external sources is collected, normalized and made ready for reliable use downstream. The focus is on building services that are trusted in production, shaped by customer needs and released continuously.

What makes this role especially interesting is the chance to influence a product where search quality, data accuracy and backend design directly support better investment decisions.

• You will build and improve backend APIs in Node.js and TypeScript for serving instrument and market data in production.
• You will design, tune and evolve OpenSearch-based search and ranking capabilities, including indexing strategy, complex queries, aggregations and performance optimization.
• You will develop data ingestion pipelines that combine, reconcile and normalize data from multiple external sources.
• You will work closely with the team to understand customer needs and turn them into solutions that create clear value.
• You will use TDD to shape code and system design, from unit tests to end-to-end flows with test containers that mirror live environments.
• You will contribute to a delivery setup with daily releases, where reliable CI outputs and production-ready quality are essential.

• Extensive hands-on experience and deep knowledge of OpenSearch or Elasticsearch, especially as a search and ranking engine rather than only as storage.
• Strong practical knowledge of indexing strategy, advanced query design, aggregations, multi-dimensional sorting and ranking, and performance tuning for low-latency workloads at scale.
• Solid hands-on experience with Node.js and TypeScript for building production APIs.
• Experience building data ingestion pipelines that combine and reconcile data from several external sources.
• Experience working with TDD in backend development, including automated tests across different levels.
• A strong interest in building solutions based on customer value and close collaboration within the team.

• Experience self-hosting and operating OpenSearch or Elasticsearch clusters.
• Interest in, or experience with, financial instruments, markets, key figures and financial analysis.
• Experience working in an agile way.

• Permanent employment at Avaron AB
• Occupational pension
• Wellness allowance of SEK 5,000 per year

Selections are made on an ongoing basis – apply as soon as you can.

At Avaron, you get the security of permanent employment combined with the variety of working at different customers. We place specialists across everything from tech, IT and industry to project management and business support – and whatever the assignment, you have a consultant manager who is there for you and your development.

You will join a backend team working on an API that delivers static and market data for financial instruments in a modern banking environment. The solution supports an investment app today and is designed to serve more retail channels over time, which means your work will sit close to both business value and end-user experience.

This is a role for you if you enjoy solving search-heavy backend challenges where performance really matters. OpenSearch is a central part of the platform, used not only for storage but as a search and ranking engine for finding, filtering, sorting and ranking instruments across multiple dimensions with high speed and low latency.

You will also work with the ingestion flow behind the API, where data from several external sources is collected, normalized and made ready for reliable use downstream. The focus is on building services that are trusted in production, shaped by customer needs and released continuously.

What makes this role especially interesting is the chance to influence a product where search quality, data accuracy and backend design directly support better investment decisions.

• You will build and improve backend APIs in Node.js and TypeScript for serving instrument and market data in production.
• You will design, tune and evolve OpenSearch-based search and ranking capabilities, including indexing strategy, complex queries, aggregations and performance optimization.
• You will develop data ingestion pipelines that combine, reconcile and normalize data from multiple external sources.
• You will work closely with the team to understand customer needs and turn them into solutions that create clear value.
• You will use TDD to shape code and system design, from unit tests to end-to-end flows with test containers that mirror live environments.
• You will contribute to a delivery setup with daily releases, where reliable CI outputs and production-ready quality are essential.

• Extensive hands-on experience and deep knowledge of OpenSearch or Elasticsearch, especially as a search and ranking engine rather than only as storage.
• Strong practical knowledge of indexing strategy, advanced query design, aggregations, multi-dimensional sorting and ranking, and performance tuning for low-latency workloads at scale.
• Solid hands-on experience with Node.js and TypeScript for building production APIs.
• Experience building data ingestion pipelines that combine and reconcile data from several external sources.
• Experience working with TDD in backend development, including automated tests across different levels.
• A strong interest in building solutions based on customer value and close collaboration within the team.

• Experience self-hosting and operating OpenSearch or Elasticsearch clusters.
• Interest in, or experience with, financial instruments, markets, key figures and financial analysis.
• Experience working in an agile way.

• Permanent employment at Avaron AB
• Occupational pension
• Wellness allowance of SEK 5,000 per year

Selections are made on an ongoing basis – apply as soon as you can.

At Avaron, you get the security of permanent employment combined with the variety of working at different customers. We place specialists across everything from tech, IT and industry to project management and business support – and whatever the assignment, you have a consultant manager who is there for you and your development.

You will join a backend team working on an API that delivers static and market data for financial instruments in a modern banking environment. The solution supports an investment app today and is designed to serve more retail channels over time, which means your work will sit close to both business value and end-user experience.

This is a role for you if you enjoy solving search-heavy backend challenges where performance really matters. OpenSearch is a central part of the platform, used not only for storage but as a search and ranking engine for finding, filtering, sorting and ranking instruments across multiple dimensions with high speed and low latency.

You will also work with the ingestion flow behind the API, where data from several external sources is collected, normalized and made ready for reliable use downstream. The focus is on building services that are trusted in production, shaped by customer needs and released continuously.

What makes this role especially interesting is the chance to influence a product where search quality, data accuracy and backend design directly support better investment decisions.

• You will build and improve backend APIs in Node.js and TypeScript for serving instrument and market data in production.
• You will design, tune and evolve OpenSearch-based search and ranking capabilities, including indexing strategy, complex queries, aggregations and performance optimization.
• You will develop data ingestion pipelines that combine, reconcile and normalize data from multiple external sources.
• You will work closely with the team to understand customer needs and turn them into solutions that create clear value.
• You will use TDD to shape code and system design, from unit tests to end-to-end flows with test containers that mirror live environments.
• You will contribute to a delivery setup with daily releases, where reliable CI outputs and production-ready quality are essential.

• Extensive hands-on experience and deep knowledge of OpenSearch or Elasticsearch, especially as a search and ranking engine rather than only as storage.
• Strong practical knowledge of indexing strategy, advanced query design, aggregations, multi-dimensional sorting and ranking, and performance tuning for low-latency workloads at scale.
• Solid hands-on experience with Node.js and TypeScript for building production APIs.
• Experience building data ingestion pipelines that combine and reconcile data from several external sources.
• Experience working with TDD in backend development, including automated tests across different levels.
• A strong interest in building solutions based on customer value and close collaboration within the team.

• Experience self-hosting and operating OpenSearch or Elasticsearch clusters.
• Interest in, or experience with, financial instruments, markets, key figures and financial analysis.
• Experience working in an agile way.

• Permanent employment at Avaron AB
• Occupational pension
• Wellness allowance of SEK 5,000 per year

Selections are made on an ongoing basis – apply as soon as you can.

At Avaron, you get the security of permanent employment combined with the variety of working at different customers. We place specialists across everything from tech, IT and industry to project management and business support – and whatever the assignment, you have a consultant manager who is there for you and your development.

You will join a backend team working on an API that delivers static and market data for financial instruments in a modern banking environment. The solution supports an investment app today and is designed to serve more retail channels over time, which means your work will sit close to both business value and end-user experience.

This is a role for you if you enjoy solving search-heavy backend challenges where performance really matters. OpenSearch is a central part of the platform, used not only for storage but as a search and ranking engine for finding, filtering, sorting and ranking instruments across multiple dimensions with high speed and low latency.

You will also work with the ingestion flow behind the API, where data from several external sources is collected, normalized and made ready for reliable use downstream. The focus is on building services that are trusted in production, shaped by customer needs and released continuously.

What makes this role especially interesting is the chance to influence a product where search quality, data accuracy and backend design directly support better investment decisions.

• You will build and improve backend APIs in Node.js and TypeScript for serving instrument and market data in production.
• You will design, tune and evolve OpenSearch-based search and ranking capabilities, including indexing strategy, complex queries, aggregations and performance optimization.
• You will develop data ingestion pipelines that combine, reconcile and normalize data from multiple external sources.
• You will work closely with the team to understand customer needs and turn them into solutions that create clear value.
• You will use TDD to shape code and system design, from unit tests to end-to-end flows with test containers that mirror live environments.
• You will contribute to a delivery setup with daily releases, where reliable CI outputs and production-ready quality are essential.

• Extensive hands-on experience and deep knowledge of OpenSearch or Elasticsearch, especially as a search and ranking engine rather than only as storage.
• Strong practical knowledge of indexing strategy, advanced query design, aggregations, multi-dimensional sorting and ranking, and performance tuning for low-latency workloads at scale.
• Solid hands-on experience with Node.js and TypeScript for building production APIs.
• Experience building data ingestion pipelines that combine and reconcile data from several external sources.
• Experience working with TDD in backend development, including automated tests across different levels.
• A strong interest in building solutions based on customer value and close collaboration within the team.

• Experience self-hosting and operating OpenSearch or Elasticsearch clusters.
• Interest in, or experience with, financial instruments, markets, key figures and financial analysis.
• Experience working in an agile way.

• Permanent employment at Avaron AB
• Occupational pension
• Wellness allowance of SEK 5,000 per year

Selections are made on an ongoing basis – apply as soon as you can.

At Convene Mobility, we develop innovative software, payment solutions, and self-service kiosks for the international car rental industry. We are looking for a Senior Backend Developer who wants to build scalable solutions, influence technical decisions, and be part of a collaborative team where ideas quickly turn into action. If you are passionate about technology, quality, and continuous improvement, we would love to hear from you.

What We Offer

• A collaborative and supportive work environment.
• Short decision-making paths and plenty of opportunity to influence.
• The chance to work on products used across multiple European markets.
• Flexibility and a healthy work-life balance.
• Opportunities for professional growth and continuous learning.
• A culture where new ideas are welcomed and people help each other succeed.

Who You Are

You are a team player who enjoys working with others, learning new things, and contributing fresh perspectives. You are motivated by solving real-world problems and creating solutions that deliver value to customers. You believe the best results come from collaboration, curiosity, and continuous improvement.

At Convene Mobility, we believe we are responsible for each other's success, every single day.

We are looking for someone who:

• Has several years of experience building and maintaining backend services, APIs, and integrations, preferably using Microsoft .NET and C#.
• Has a solid understanding of databases and software architecture.
• Enjoys working closely with others and contributing to the success of the team.
• Is comfortable communicating in both Swedish and English.
• Is curious, open-minded, and eager to learn new technologies and ways of working.
• Brings new ideas and is not afraid to challenge established approaches.
• Enjoys solving complex problems and finding smarter ways of working.
• Shares knowledge openly and helps colleagues succeed.
• Takes initiative and thrives in a collaborative environment.

It is a plus if you have experience with:

• Clean Architecture
• Microsoft Azure
• REST APIs
• Azure DevOps
• Git
• CI/CD
• Agile software development
• Payment solutions
• AI-assisted development tools such as GitHub Copilot or similar

About the company

Convene Group consists of the companies Convene Payment, Convene Hospitality, Convene Mobility and CrediCare. We are around 150 employees across offices in Norway, Sweden, and the United Kingdom. Technology is at our core, and for more than 30 years we have been a leader in developing self‑service solutions.

Today, we deliver payment and administration services to customers in more than 14 countries and across a wide range of industries. Our solutions make it easy for our customers to get paid for their services, and we take responsibility for the follow‑up when payments are overdue – always with an ethical and professional approach.

At Convene, we believe in making everyday life simpler – for both customers and employees. As an employee with us, you will be part of an engaging and development‑oriented work environment with clear expectations, substantial autonomy, and a strong sense of security.

Our values describe how we work, make decisions, and achieve results together:

• Yes, we can: We meet challenges with a solution‑oriented mindset, take ownership, and see things through.
• Make it simpler: We challenge complexity and create smarter processes – internally and for our customers.
• Act on opportunities: When opportunities arise, we seize them. We move quickly and experiment early.
• Fail, learn, progress: We learn from what we try. Mistakes are insights, not setbacks.

Together, we create solutions that make a difference – and that push our industry forward.