• You will further develop our existing Shopify apps, ensuring stability, performance and clean code quality • You will design new features and epics that are scalable, maintainable and pragmatic • You will take technical ownership: plan architecture, identify risks early and establish sensible patterns • You will build new Shopify apps — from idea through technical implementation to launch • You will work closely with our Product team: they define the what, you own the how • You will support junior developers through code reviews, pairing/sparring and clear communication • You will help evolve team standards, tooling and processes (testing, reviews, architectural decisions)

• 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.