Senior Full Stack Engineer (Backend)

We're looking for a Senior Full Stack Engineer to join our Core Experience team and contribute to the evolution of Safe{Wallet}, a leading smart wallet in the Ethereum ecosystem. You'll take end-to-end ownership of features, from conception through to production - with a focus on backend development while also contributing across the stack.

What you will be doing:

• Build and maintain backend services supporting the Safe{Wallet} app
• Contribute to frontend/mobile development when needed (React/React Native)
• Own the lifecycle of features from design to deployment and monitoring
• Collaborate closely with staff engineers, product managers, and designers
• Debug and resolve issues across services and infrastructure boundaries
• Share knowledge and support the team's learning culture, * Home Working Budget: Personalise your home office with a dedicated budget! Choose from a sleek desk, top-notch headphones, a comfy chair, and more. We're committed to creating a workspace that inspires you.
• 30 vacation days as standard: Take the time off you need no matter where you work. All of our contributors get 30 vacation days by default, with public holidays in addition.
• Continuous Learning: Invest in yourself with our personal education and conference budgets. Stay ahead of the curve by attending conferences, workshops, and courses that align with your professional growth.
• Innovative Fridays: Unleash your creativity! Spend Friday afternoons diving into research or working on a side project within our exciting ecosystem. It's the perfect opportunity to explore new ideas and contribute to innovative endeavours.
• Flexible Work Schedules: Embrace work-life balance with our flexible working schedules. We understand that everyone has unique needs, and our hybrid work policies empower you to choose a working style that suits you best.

Do you have experience in TypeScript?, * Strong experience with TypeScript and backend/frontend systems

• Prior experience in Web3 and Ethereum-based ecosystems
• Proven success in developing and shipping features from scratch
• Understanding of software principles: SOLID, DRY, clean code, algorithms

Must-Have Skills

• TypeScript (Node.js)
• System Architecture (Backend & Frontend)
• Web3 tooling and concepts
• Ownership mindset and proactive problem solving
• Clear communication and team alignment, * Experience with Python, dJango or FastApi
• Experience with React / React Native
• Docker and DevOps familiarity
• Computer Science degree or equivalent knowledge, * Owner Mentality: Takes full responsibility for outcomes, not just tasks
• Full Stack Problem Solver: Debugs and resolves issues across multiple tech layers
• Collaborative Communicator: Communicates clearly, escalates early, fosters shared understanding
• Curious & Web3 Fluent: Demonstrates a strong understanding of Web3 and eagerness to explore new tools
• Humble Expert: Balances deep expertise with openness to feedback and learning
• Agile Self-Manager: Organises work effectively in async, fast-paced environments

Safe is redefining the future of self-custodial onchain treasury management. It currently holds $>60B+ in onchain assets. Safe{Wallet} web and mobile is the de-facto standard for crypto native organizations, individuals and groups to co-manage assets via Multi-sig. Safe{Wallet} infrastructure is widely used by developers integrating Safe. It is used for multi-million dollar treasury operations and governance by top protocols like World, Aave, Balancer and Gnosis. With more innovations in security and user experience, Safe is poised exponential growth in DeFi and onchain asset management.