Senior .NET Architect & Backend Leader

Rebtel; Stockholms kommun; On-site; SEK 800,000 - 1,100,000; Full time

Benefits offered by this job

Pension Plan

Health Checkups, Influenza shots and  

Private Medical Insurance

Dental Insurance

Occupational insurance

Wellness allowance (5,000 SEK)

Discount on gym memberships

Bonus program

Extra parental pay

30 days annual vacation

Monday breakfasts

Relocation Support

Job summary

Rebtel in Stockholm is seeking a Senior .NET Developer who loves solving complex problems and delivering high‑quality, scalable back‑end services.

You will design and implement distributed systems, mentor engineers, and contribute to the technical roadmap, while collaborating across teams to raise engineering standards and security.

This role offers the chance to own meaningful architecture decisions from day one and to shape how we connect people across borders.

Qualifications

• Proven proficiency in C#/.NET and ASP.NET Core with EF Core.
• Experience designing and implementing large-scale distributed systems (microservices, event-driven, serverless).
• Strong knowledge of design patterns, domain-driven design (DDD), and SOLID principles.
• Extensive experience with at least one cloud platform (AWS, Azure, or GCP) and related services.
• Deep understanding of SQL and NoSQL databases and data modeling for scalability.
• Ability to decompose complex problems and evaluate trade-offs for speed vs. stability.

Responsibilities

• Take part in design, development, and deployment of high-throughput backend services and APIs.
• Establish a long-term technical vision and roadmap for BE systems evolution.
• Drive adoption of new technologies and patterns to maintain competitive edge.
• Identify and resolve technical debt proactively.
• Mentor engineers and elevate engineering quality across the org.
• Influence testing, performance tuning, and security standards across teams.

Skills

C# / .NET

ASP.NET Core

EF Core

Microservices

DDD / SOLID

Cloud platforms

SQL / NoSQL

Tools

None

Job description

Rebtel in Stockholm is seeking a Senior .NET Developer who loves solving complex problems and delivering high‑quality, scalable back‑end services.

You will design and implement distributed systems, mentor engineers, and contribute to the technical roadmap, while collaborating across teams to raise engineering standards and security.

This role offers the chance to own meaningful architecture decisions from day one and to shape how we connect people across borders.