Senior Software Engineer – Backend (.NET​/C#​/Python

Overview

Bislab is a rapidly scaling innovator in credit assessment and fraud prevention, building sophisticated, API-first products for organizations with complex needs. Our mission: help businesses make smarter decisions through advanced data, AI, and secure, scalable technology -- reducing financial distress and protecting companies from crime.

We re already live in Norway and Sweden, launching in Finland in 2025, and now we re hiring Senior Software Engineers to help develop our secure data platform and expand our products internationally. We d love to hear from you.

• Work on complex, meaningful tech -- from high-scale data systems to advanced algorithms for credit, risk, and fraud detection.
• Ownership from day one -- as an early hire, you ll influence architecture, product, and the company s future.
• Full product journey -- from concept to implementation and launch.
• A senior, high-trust team -- we value creativity, quality, and collaboration over politics and bureaucracy.

• You ll work primarily with C#, Python, Azure, Postgre
  
  SQL, and Neo4j to develop a secure, scalable data platform for analyzing large datasets across borders.
• Build algorithms for credit assessment, risk analysis, and fraud detection.
• Integrate external data sources and APIs into our products.
• Implement robust security and compliance solutions for sensitive data.
• Collaborate closely with product and data teams to deliver high-impact features.

• Has 5+ years of backend engineering experience.
• Is confident with C#, .NET, Azure, SQL/PostgreSQL (Python and Neo4j a plus).
• Understands performance, scalability, and security in distributed systems.
• Ideally has experience with data-intensive or financial/risk/fraud-related products.
• Thrives in a dynamic environment where ownership and initiative are expected.
• Is motivated to help shape the future of a scaling company.

• Salary + equity
• Salary growth linked to ARR milestones.
• A central Oslo office at Arbins gate 1.
• Short decision paths, high autonomy, and a clear mission.