ppbSenior Software Engineer – React Native Full Stack (MADRID) /b /ppbLocation: /b Madrid, Spain /ppbWorking Model: /b Primarily in-office /ppbCompensation: /b $100,000–$150,000 USD base salary + equity /ppbAbout the Company /b /ppOur client is an early-stage fintech company building a general, non-custodial financial application designed to make moving and managing money simple and accessible. The product allows users to remain in control of their funds while spending and transferring money instantly across borders, without having to manage the complexity traditionally associated with crypto or self-custody. /ppThe company has a small, highly technical engineering team that ships quickly and cares deeply about product quality, usability, and customer experience. /ppbAbout the Role /b /ppWe are looking for a senior, product‑minded software engineer to take ownership of major parts of the product across React Native, backend services, APIs, integrations, testing, and release. /ppYou will own features end‑to‑end across the React Native application, backend services, APIs, and integrations. /ppYou will work closely with the founders, product, and design teams to move ideas from concept to production. You should be comfortable making pragmatic technical decisions, working without perfectly defined specifications, and owning features from beginning to end. /ppThis is an opportunity to join a small team at an early stage and have a meaningful influence on the product, technical architecture, engineering standards, and company culture. /ppbKey Responsibilities /b /pulliOwn and ship product features end‑to‑end across the React Native application, backend services, APIs, and integrations. /liliBuild major parts of the mobile application across UI, state management, API integration, testing, and release. /liliBuild and maintain backend services using Node.js and TypeScript. /liliWork directly with founders, product,



and design to move quickly from concept to production. /liliDebug complex issues across iOS, Android, backend services, and third‑party integrations. /liliImprove mobile performance, responsiveness, animations, and overall product quality. /liliMake pragmatic architecture decisions as the product and engineering team grow. /liliHelp define engineering standards, tooling, development processes, and technical culture. /liliContribute to product quality and attention to detail across every customer touchpoint. /liliUse AI development tools to improve engineering speed, quality, and output. /li /ulpbRequirements /b /pulliAt least five years of professional software engineering experience. /liliStrong experience building and shipping production software. /liliProven experience developing and releasing production applications using React Native. /liliStrong full‑stack engineering ability across frontend, backend, APIs, and integrations. /liliExperience with Node.js or similar backend technologies. /liliAbility to own features from initial concept through development, testing, deployment, and release. /liliStrong product judgment and attention to the customer experience. /liliComfortable working in a fast‑moving, early‑stage environment with limited structure. /liliHigh level of ownership, initiative, and accountability. /liliWillingness to work primarily from the Madrid office. /li /ulpbNice to Have /b /pulliExperience building consumer‑facing mobile products. /liliExperience with Expo, native modules, mobile CI/CD, or App Store and Google Play releases. /liliExperience with React and modern frontend development. /liliExperience with AWS, Kubernetes, Terraform, or other infrastructure technologies. /liliExperience in fintech, payments, digital banking, crypto, or Web3. /liliKnowledge of EVM, Solidity, or blockchain infrastructure. /liliPrevious experience at an early‑stage startup or as a founder. /liliExperience helping establish engineering standards or culture within a growing team. /li /ul /p #J-18808-Ljbffr

📌 Senior Software Engineer – React Native & Full Stack (Madrid)
🏢 Surge Group
📍 Madrid