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Backend Developer for System Integration (Consulting -> Direct Hire)

Friday Väst AB

Stockholms län, Stockholm

Previous experience is desired

~54 900 kr / per month ->
Fixed monthly, weekly, or hourly salary

Education: Data
Eftergymnasial utbildning två år eller längre

26 days left
to apply for the job

Do you want to build robust backend solutions where complexity is not a problem, but the challenge itself? At Sinetiq, you will work on real system integration: distributed systems, API design, middleware, and architecture – where you are responsible for making business-critical systems work together reliably and scalably. We are looking for someone driven by designing and building stable backend solutions, and who in the long run wants to take the next step towards technical leadership or architecture.

About the role:

In this role, you work at the core of complex system environments where you design integration architecture, build services and backend logic, set up communication between distributed systems, and ensure performance, robustness, and scalability.

You will work closely with both development teams and the business, often in technically challenging environments where there are many systems, complex dependencies, and high demands. Common technical areas include API design, middleware and integration platforms, data modeling and database integration, distributed systems and microservices architecture, as well as infrastructure and deployment. You work primarily in a consulting assignment at the client – often in technically advanced environments – either in a team or more independently. In the long run, there are good opportunities to move into an architect role.

Examples of what you will do:
  • Design and develop backend services for integration between systems
  • Build robust APIs and contracts (OpenAPI / AsyncAPI)
  • Work with distributed systems where reliability and performance are critical
  • Set up and configure middleware and integration flows
  • Troubleshoot complex problems across system boundaries (network, data flows, latency)
  • Drive technical decisions regarding architecture and design
  • Test and verify systems end-to-end
We are looking for you who:
  • Have a university degree in computer science or equivalent education
  • Have 3–5 years of experience in system development using Java or C#/.NET
  • Have good knowledge of integration tools and platforms, as well as experience with API management, middleware, and database handling
  • Speak and write fluent Swedish and English, as both languages are used in daily work
Meritorious:
  • Experience with cloud platforms (e.g., AWS, Azure, Google Cloud)
  • Knowledge of network protocols and security principles
  • Experience with DevOps methods and tools
  • Experience from manufacturing, factory automation, or industrial environments
  • Documentation of API contracts (OpenAPI, AsyncAPI)

In addition to technical competencies, great importance will be placed on your personal qualities. As a person, we see that you possess strong analytical and problem-solving skills, with the capacity to troubleshoot complex technical issues. You have very good oral and written communication skills, with the ability to convey technical information to both technical and non-technical audiences. You are a team player who thrives working both independently and in teams with others. You have good organizational skills, with high attention to detail and a strong focus on delivering high-quality work.

About the client company:

Sinetiq has more than 20 years of experience in system integration, using service-oriented architecture and practical development of component-based systems. They work with both national and international customers, and with their unique expertise, Sinetiq helps them increase their profits and strengthen their competitiveness by allowing them to focus on their core business. In short: Sinetiq makes it work.

About the employment:

This is a consulting assignment, which means that initially, you will be employed by Friday. The ambition from the client and our side is that you will eventually become directly employed by Sinetiq.

Other info:
  • Scope: Full-time
  • Start: September
  • Location: Stockholm
  • Recruiter: Alice Tegebro, [email protected]
  • Salary: Fixed monthly salary

Apply by clicking the link below. Remember to apply quickly as we conduct ongoing candidate selection and the ad may close before the position is filled if we move to the selection and interview phase. We do not accept applications via email.

About Friday:

At Friday, we help tech talents find roles where they thrive, develop, and make a difference. By listening to what you want and are driven by, we match you with companies and opportunities that make you look forward to going to work.

We value ambition and potential highly and actively work for unbiased recruitment, where everyone is given the same chance to succeed. We are located in Stockholm, Gothenburg, Malmö, Linköping, and Örebro.

Every year we conduct over 5,000 career meetings and match candidates with everything from global companies to innovative startups.

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