Senior Software Developer

PSV; Kongens Lyngby; On-site; DKK 750,000 - 950,000; Full time

Benefits offered by this job

Flexible, trust-based work culture

Job summary

SKJOLDET is seeking a Senior Software Developer to own architecture decisions and drive real-time fraud processing systems. You’ll work with the CTO and founders to shape product direction and scale our backend stack.

You'll design high-performance backend services (TypeScript/JavaScript, Node.js) using MongoDB/NoSQL, with frontend awareness and a bias toward production reliability. Join a small, ambitious fintech startup in Lyngby with a flexible, trust-based culture and opportunities to

Qualifications

• Strong hands-on experience with TypeScript/JavaScript and Node.js.
• Solid understanding of NoSQL databases, ideally MongoDB.
• Experience designing high-performance, production-grade systems.
• Comfortable working across the full stack backend-heavy, with frontend awareness.
• Interest in AI/ML and how it applies to detection and prevention problems.
• Eager to grow and motivated by building technology that disrupts an industry.
• Experience from fintech, finance or regulated environments is a plus.

Responsibilities

• Design and build high-performance, scalable backend systems for real-time fraud detection.
• Contribute to the architecture of Denmark's most ambitious fraud intelligence database.
• Collaborate with fraud analysts and data scientists to turn signals into actionable prevention.
• Own code quality, performance, and reliability across the stack.
• Help shape our technical culture as the team grows.

Skills

TypeScript/JavaScript

Node.js

NoSQL (MongoDB)

High-performance systems

Frontend awareness

AI/ML interest

Fintech / regulated environments

Tools

MongoDB

React

AI/ML concepts

Job description

ABOUT SKJOLDET

We are a Danish fintech startup turning the approach to digital fraud on its head. Imagine being able to convert a phishing site into a signal that could stop everyone from losing money to that exact scam. That's what we're working on. And why? We witnessed first-hand how digital fraud hits ordinary people, especially those close to us, costing them both time and money. We decided to do something about it. Instead of reacting to fraud after the fact, we stop it proactively, outside the bank's systems, before the payment goes through. We are a small, ambitious team of two founders, developers and analysts, entering a new chapter of investment and scaling.

YOUR ROLE

As our Senior Software Developer, you'll be a cornerstone of the technical team, owning architecture decisions, driving performance, and helping build systems that process fraud signals at scale in real time. You'll work closely with our CTO and founding team and have real influence on the technical direction of the product.

• Design and build high-performance, scalable backend systems for real-time fraud detection




• Contribute to the architecture of Denmark's most ambitious fraud intelligence database




• Collaborate with fraud analysts and data scientists to turn signals into actionable prevention




• Own code quality, performance, and reliability across the stack




• Help shape our technical culture as the team grows

TECH STACK

TypeScript / JavaScript · Node.js · MongoDB / NoSQL · React · AI / ML

WHAT YOU BRING

We're not just hiring your CV. We're hiring your drive to build things that matter and your ability to thrive when the problem hasn't been solved before.

• Strong hands-on experience with TypeScript/JavaScript and Node.js




• Solid understanding of NoSQL databases, ideally MongoDB




• Experience designing high-performance, production-grade systems




• Comfortable working across the full stack backend-heavy, with frontend awareness




• Interest in AI/ML and how it applies to detection and prevention problems




• Eager to grow and motivated by building technology that disrupts an industry




• Experience from fintech, finance or regulated environments is a plus

WE OFFER

• A key engineering role in a fintech startup with real traction and European ambitions




• Direct collaboration with the founding team and your decisions shape the product




• Hard, meaningful problems at the intersection of AI, finance and security




• Flexible, trust-based work culture in Lyngby




• The chance to help build something that doesn't exist yet