Junior Developer

Omnium; Oslo; Hybrid; NOK 450,000 - 650,000; Full time

Benefits offered by this job

Hybrid flexibility

Central Oslo office

Competitive pay and solid pension

Team that actually likes each other

Job summary

Omnium's Retail Operating System powers seamless order management and commerce operations across web, in-store, and every channel in between for the Nordics' biggest retail brands, including Varner, Coop, Stadium, Intersport, and HiFi Klubben.

Eight years in, still building like a startup: no legacy code, high pace, real demand. We want juniors who are curious about AI and use it as a natural part of how they work — tools like Claude Code included.

Qualifications

• A degree in CS/Software Engineering (include transcript).
• Experience with C#/.NET and APIs, databases, and modern web architecture.
• Familiarity with Claude Code or similar AI dev tools.
• Comfortable with English; Norwegian is a plus.

Responsibilities

• Diagnose and fix advanced support cases, focusing on root causes, not workarounds.
• Support first-line escalations with clear technical guidance.
• Join client conversations that need developer depth.
• Ship backend fixes, improvements, and new features across the stack.
• Work daily with backend code, integrations, and APIs.
• Use Claude Code and other AI tooling as part of your normal workflow.
• Document findings so the whole team gets sharper over time.

Skills

C#/.NET experience

APIs

Databases

English proficiency

Analytical thinking

Education

CS or Software Engineering degree

Tools

Claude Code

AI dev tools

Job description

Omnium's 'Retail Operating System' powers seamless order management and commerce operations across web, in-store, and every channel in between for the Nordics' biggest retail brands, including Varner, Coop, Stadium, Intersport, and HiFi Klubben.

Eight years in, still building like a startup: no legacy code, high pace, real demand. We've been named one of Norway's 50 fastest-growing tech companies several years running.

We want juniors who are curious about AI and use it as a natural part of how they work — tools like Claude Code included.

The role

You start in second-line technical support, working on real bugs, finding root causes, and shipping fixes — while also picking up development tasks from day one. It's the fastest way to actually understand a complex platform.

You'll work inside our tech team alongside Support, Customer Success, and Onboarding, join client conversations when things get technical, and pair with senior developers on lasting solutions.

What you'll do

• Diagnose and fix advanced support cases, focusing on root causes, not workarounds
• Support first-line escalations with clear technical guidance
• Join client conversations that need developer depth
• Ship backend fixes, improvements, and new features across the stack
• Work daily with backend code, integrations, and APIs
• Use Claude Code and other AI tooling as part of your normal workflow
• Document findings so the whole team gets sharper over time

Who we're looking for

Fresh out of a CS or software engineering degree, or 1–2 years in the field. Analytical, structured, genuinely curious how things work under the hood, and comfortable in a codebase or a client call.

You don't need to know our platform yet. You need to be curious, quick to dig in, and motivated to grow fast.

You have

• A degree in CS, software engineering, or related (include your transcript)
• C#/.NET experience
• Familiarity with Claude Code or similar AI dev tools
• A working grasp of APIs, databases, and modern web architecture
• Comfortable English; Norwegian is a plus

Nice to have

• Vue.js or another modern frontend framework
• Exposure to e-commerce, SaaS, or systems integration
• A technical, customer-facing role in your past

What we offer

• A structured way into real product development
• Rare, early insight into a business-critical SaaS platform
• A sharp, collaborative dev team that invests in each other
• Hybrid flexibility, competitive pay, solid pension and leave
• A central Oslo office (Universitetsgata 22)
• A team that actually likes each other