Senior Full-Stack Dev (TypeScript/.NET) – Fintech

Build features end-to-end on a live Nordic loan origination platform. We run a multi-tenant mortgage and loan origination platform used by banks and lending advisors. It handles the full journey: customer onboarding and identity verification, credit bureau and debt-register lookups, affordability and eligibility calculations across a dozen banks, offer generation, and document signing. Real users, real money, real regulatory constraints. We're looking for a full-stack developer who is comfortable moving across the whole stack — a React screen in the morning, a .NET service handler after lunch — and who writes code the next person can read. You might be the perfect match if you are/have - Minimum 4 years of experience in a similar position - Proficiency in TypeScript and .NET - Familiarity with event-driven architecture (EDA) and Domain Driven Design (DDD) principles - Experience writing end-to-end (e2e) tests, not just unit tests - Effective AI usage and AI-supported SDLC — you work daily with tools like Claude Code, Copilot or Cursor, and you still review and own every line that goes in - Comfort in a large existing codebase: reading before writing, following the conventions already there - Fluency in English (B2+) for daily client communication - A collaborative mindset, attention to detail, and a focus on quality - 4+ hours of daily overlap with Central European Time (CET/CEST) What you'll work on - Features in our customer-facing portal and internal CRM/advisor app (React, Next.js, TypeScript) - BFF layer and shared libraries in a NestJS + Nx monorepo - .NET microservices organised by bounded context (Case, Customer, Offer, Relationship, Support) - Integrations with credit bureaus, bank APIs and public registries - Tests that actually run in CI — unit, integration with Testcontainers, Playwright e2e Our stack Frontend: TypeScript, React 18, Next.js, MobX, Zustand, React Hook Form, Zod/Yup, Tailwind CSS, MUI, Ant Design, Storybook, i18next Backend (Node): NestJS, Nx monorepo, CQRS, Kafka (KafkaJS), PostgreSQL/TypeORM, MongoDB/Mongoose, Redis, GraphQL, REST, OpenAPI Backend (.NET): .NET 10 / .NET 8, ASP.NET Core Minimal APIs, MediatR (CQRS), MongoDB driver, Redis, Polly, Serilog, Outbox pattern Cloud & infra: AWS (EKS, API Gateway, ALB, S3, Cognito, MSK), Terraform, Terragrunt, Docker, GitHub Actions Testing: Jest, Vitest, Playwright, Cucumber, Testcontainers, xUnit You don't need to have shipped all of it. You do need to be strong in .NET, and genuinely willing to learn the rest. Nice to have - Fintech, banking or other regulated-domain experience - Kubernetes / EKS and Terraform at scale - Experience introducing or improving AI-assisted workflows in a team, not just for yourself You will - Contribute to both front-end and back-end development - Ensure high-quality code through testing and code reviews - Collaborate in a remote-first environment - Keep a client-centered mindset, with regular and open communication - Contribute to the success of innovative technology projects in fintech How we work, and what we offer - Small, senior team. Short-lived branches, PR review on everything, Jira for tracking, Confluence for decisions. We favour clear naming and one correct implementation over defensive fallbacks and compatibility shims. AI-assisted development is normal here — we care about the result and the review, not the keystrokes. - A fair rate. We value talent and professionalism and pay accordingly. - Grown-up team culture. We respect maturity, real conversations, and intelligent working — which means not overworking. Effective listening matters here, so your thoughts and ideas count. - Continuous learning. We support continued learning and provide the tools and licences you need. - Sustainable pace. It isn't only about work. We care about the whole person and expect people to look after themselves along the way. Engagement - Long-term contract, 30–40 hours per week - Fully remote, async-first, with a short daily sync Hiring process - Intro video call (~1 hour) — background, expectations, and culture fit. - Pair programming session — a hands-on call with one of our engineers and our CTO, working through a real-world problem together. - Offer — if everything aligns, we send an offer and the next steps. - For some candidates we start with a paid 2-week trial task on a real ticket, then continue ongoing if it's a good fit.