• Design, build, and maintain scalable backend services and APIs using Python • Develop and optimise database solutions using PostgreSQL • Work with GCP services to build and maintain cloud-native applications • Contribute to system architecture and technical design decisions • Ensure high levels of performance, reliability, and scalability • Collaborate with cross-functional teams to deliver features end-to-end • Troubleshoot and resolve complex backend and infrastructure issues • Write clean, maintainable, and well-tested code following best practices • Support continuous improvement of engineering standards and processes

• Design and build backend services in Node.js and Rust for Nexus’s Layer 1 and DEX. • Develop APIs and data pipelines for trading, liquidity, and on-chain verification. • Build and maintain blockchain infrastructure components (RPC endpoints, explorers, dev tools). • Write clean, well-tested code that supports verifiable financial applications.

• Aligning Engineering with High-Value Problems. Work closely with product and engineering leadership to propose initiatives and drive impactful technical changes. • Collaborating across teams, guiding senior developers in managing and reducing technical debt. • Building and scaling Global Platforms. Develop and maintain products with billions of page views per month, ensuring scalability and performance. • Solving Complex Technical Challenges. Work with engineers across European offices to deliver solutions that impact millions of users. • Owning and Improving Development Processes. Participate in product design, write and review code, and advocate for quality, security, and performance with a DevOps mindset • Collaborating and learning with the OLX Engineering community.

• Development: You design and develop robust, scalable web applications as well as service-oriented interfaces to integrate complex business logic across different project contexts. • Operations & Support: You act as the technical contact for third-level support, analyze functional requirements, identify causes of incidents, and proactively assist in finding solutions and planning releases within projects. • Database Architecture: You take responsibility for planning, managing, and optimizing our databases. • Coordination: You coordinate your tasks within the team by implementing technical specifications in clear, structured sprint cycles while keeping project goals in focus. • Requirements Analysis: In direct exchange with internal stakeholders, you evaluate new functional and technical requirements, translate them into viable solution concepts, and provide advisory input during planning. • Documentation: You independently create and maintain our development documentation, ensuring knowledge is sustainably preserved and always accessible.