Senior Full Stack Engineer - Loan Insurance (f/m/d) - Node.js & Typescript in Berlin

We are Finanzcheck - the online loan comparison platform and the go-to place for consumer loans in Germany. We shape the credit market of tomorrow and in 2022 we were recognized with the Kununu Top Employer Award. Become now part of our success story!

YOUR NEW TEAM

We are looking for a Senior Fullstack Engineer to join our cross-selling tech team contributing to its mission to connect customers to relevant financial products beyond consumer loans. By that the team plays an important role for the company's strategy to strengthen its footprint as a financing provider beyond consumer loans. That is why we build and run scalable services that offer customers valuable additions like income protection insurance and other cross-selling products at the right moment in time in their individual journey. Our work is rooted in modern engineering practices and a strong sense of ownership. We rely on a robust and modern tech stack including Node.js, TypeScript, React, MySQL, Postgres, AWS, GitHub Actions and Terraform to deliver value in an efficient and reliable manner.

WHAT YOU WILL BE DOING

• Work in a distributed environment with different NodeJS and Typescript services that run on Kubernetes.
• Build and maintain UIs based on React / Typescript, both customer-facing as well as for internal users.
• Conceptualize and build new functionality, improve existing systems and services and optimize business-critical performance and efficiency parameters.
• Integrate and maintain third-party services and external systems, ensuring reliable data exchange, secure communication, and seamless interoperability within our platform ecosystem.
• Design and implement asynchronous, event-driven communication using AWS SNS and SQS to ensure scalable and resilient service interactions.
• Implement and maintain real-time features using WebSocket technologies (e.g., socket.io) with scalable adapters such as Redis.
• Define and evolve inter-service contracts using Protobuf and ensure consistent validation across services using schema validation libraries such as Zod.
• Ensure secure authentication and authorization flows using OAuth, JWT, and external identity providers.
• Take active part in the decision-making processes of your team (goals, concepts, timelines, stack, etc.).
• Work closely with EM and PO to plan and continuously develop new features for the team's domain
• Involvement in the development and maintenance of the team's products end to end in line with our "you build it, you run it, you own it" philosophy which also includes DevOps tasks.

YOUR PROFILE

• You are at an expert level with Node.js using TypeScript building distributed applications
• You have strong experience designing and implementing event-driven architectures and asynchronous messaging patterns.
• You have vast experience in frontend development with TypeScript and React including conversion-driven b2c context
• You are experienced in implementing secure authentication and authorization mechanisms (OAuth, JWT, external identity providers).
• You have hands‑on experience with real-time communication technologies (e.g., WebSockets) and scalable distributed systems patterns.
• Experience with AWS RDS
• Extensive experience with GitHub Actions, AWS and containerized microservice infrastructures, ideally running on AWS with Kubernetes and Terraform
• Familiarity with the "LGTM" Grafana stack (Loki, Grafana, Tempo and Mimir/Prometheus) is a plus
• Experience in domains like customer communications and sales / advisory is a big plus
• You demonstrate true end‑to‑end ownership by independently leading complex initiatives, making pragmatic decisions, aligning stakeholders, and ensuring high‑quality execution across the full lifecycle, from concept to production and beyond.
• You are passionate about your work and a great communicator with interest in cross‑team / cross‑functional initiatives
• You already have experience in owning a domain end to end and taking over leadership aspects with regard to stakeholder management and team

WHAT WE OFFER

Our team comes from over 50 nations and you can expect an open and dynamic working environment with plenty of room for your further development. We actively work to create a diverse and inclusive work environment by sharing our different skills, ideas and experiences as a team and representing diversity within the company. For your personal development, we offer internal career programs, further training opportunities and language courses (German).