Back-End Developer (.NET)

About REMIUM

REMIUM is a financial services company built to serve global businesses and individuals with seamless local and cross-border payment infrastructure. From Family Offices and payroll businesses to SaaS providers and E-commerce operators, our clients trust us to simplify international payments, FX, treasury, and financial operations within a fully compliant digital ecosystem.

By combining powerful digital tools with high-touch, human-led support, we deliver a service designed for the complex realities of global finance. Headquartered in London, we’re building the next generation of payments infrastructure that empowers ambitious businesses and individual clients alike.

This is your chance to join a fast-scaling fintech at the intersection of payments, FX, and private client services, and play a key role in shaping our growth story.

Role Summary

We are looking for a Back-End Developer to join our growing in-house engineering team and help build the services behind our payments platform.

Our backend is a suite of .NET microservices, backed by PostgreSQL and Redis, running on Google Cloud Platform (GKE) and delivered through GitLab CI/CD. Working alongside our senior engineers, you will develop and maintain the services that power international payments, FX, and treasury operations for our clients.

This role suits a capable developer who wants to deepen their craft in a regulated fintech — writing well-tested, production-grade code where reliability genuinely matters, with senior support around you and room to grow.

Key Responsibilities

• Develop and maintain .NET microservices, from feature development through to bug fixing and refactoring
• Write clean, well-tested code with strong attention to correctness and reliability in a financial context
• Work with PostgreSQL and Redis for transactional data and caching
• Build and consume RESTful APIs, collaborating with front-end developers on integration
• Contribute to GitLab CI/CD workflows, including automated tests and release processes
• Participate actively in code reviews, both giving and receiving constructive feedback
• Work with security and compliance expectations in mind, appropriate to a regulated financial services environment
• Grow with the team: take on increasing ownership of services as the platform and your experience develop

Our Expectations

• Solid commercial experience building back-end systems in C# / .NET
• Working knowledge of relational databases; PostgreSQL experience is a plus and familiarity with caching patterns
• Experience building and consuming RESTful APIs
• Familiarity with containerised environments (Docker; Kubernetes exposure is a plus)
• Experience with automated testing and CI/CD pipelines; GitLab experience is advantageous
• A careful, quality-focused approach to code, with the humility to learn and the initiative to contribute ideas
• Experience or strong interest in fintech, payments, or regulated environments is advantageous
• A collaborative team player, comfortable in a small and fast-moving engineering team

Why REMIUM?

At REMIUM, we’re not just building a payments company, we’re building a trusted network for global businesses and individual clients. Every client you support helps bridge global finance with a human, personal touch.

We believe in empowering our people, celebrating individual contributions, and creating an environment where ambition and collaboration go hand-in-hand. If you want to join a team where your work shapes how our most valued clients experience both financial and lifestyle services, this is the place for you.

Here’s what we stand for:

✅ We Are Client-Centric: Every solution starts with understanding our clients’ needs.

🤝 We Are Collaborative: We achieve more when sales, product, and operations work as one.

💡 We Are Solution-Focused: Complex problems are opportunities to innovate.

💙 We Are Supportive: We empower each other to deliver our best.

🏆 We Celebrate Impact: Every role matters, every client counts.

What We Offer

• Competitive base salary
• Hybrid working model
• 25 days annual leave + bank holidays