Senior Back-End/Full-Stack Developer

100%, Belgrade

Relio is a Swiss Fintech company with offices in Zurich and Belgrade. Two years ago, we launched fully digital business accounts for freelancers, SMEs, start-ups and corporate clients, becoming one of just five institutions currently holding a FinTech licence in Switzerland. Our offering is built on a compliance technology that allows us to serve companies with complex business setups.

As a Senior Back-End/Full-Stack Developer, you’ll join a team of skilled developers and collaborate closely with QA, DevOps and Product management. Together, we design, architect, develop, and test exciting new features for our state-of-the-art payment product.

What You’ll Do:

• Full-Stack Development: Develop, test, and document features for both our internal compliance applications and Relio’s public-facing payment systems.
• Clarify & Refine: Collaborate with the team to turn high-level ideas into detailed technical specifications, ensuring clarity and precision in every feature.
• End-to-End Ownership: Take full ownership of the SDLC, from navigating ambiguous requirements to final production deployment.
• Architectural Leadership: Communicate and document architectural decisions clearly to ensure team alignment and scalable growth.
• Product Stewardship: Maintain and optimize the code you produce, providing bug fixes and ongoing support to ensure system stability.
• High-Performance Delivery: Maintain a healthy balance between software quality, technical debt, and product efficiency.

Who You Are:

• Experienced Developer: 5+ years in professional software development with a track record of building scalable, reliable applications.
• CS Fundamentals: Strong grasp of data structures, algorithms, and clean architecture.
• TypeScript Focus: Expertise in TypeScript is preferred, but we welcome masters of C++, Java, or C# who are eager to switch stacks.
• Full-Stack Mindset: A versatile problem-solver willing to handle both backend and frontend features as needed.
• Web & Data Expert: Deep knowledge of Relational Databases (SQL), HTTP protocols, and RESTful APIs.
• Quality Driven: Committed to writing robust unit/integration tests and possessing advanced debugging and profiling skills.
• Education: Bachelor’s or Master’s degree in Computer Science, Informatics, or a related field.
• Communicator: Fluent in English and comfortable collaborating in a fast-paced environment.

Technology we use:

• Languages/Environment: TypeScript, Node.js, MacOS/Linux
• Frameworks/Libraries: Express, NestJS, React, Material UI (MUI)
• Data & Infrastructure: PostgreSQL, Google Cloud Platform, Docker
• Workflows: Git/GitHub, Jira

What We Offer:

• Hybrid work model
• 25 days of paid vacation
• Business offices located near Novi Beograd train and bus station
• Flexible work environment, inclusive and supportive team culture

This is your opportunity to be part of a startup and influence the trajectory of the business. Expand your knowledge and forge a promising career in financial services. If you are ambitious and deeply passionate about fintech, we eagerly await your application.

To apply, please submit your application (including salary expectations) electronically. For more details, please visit www.relio.ch.