Front End Developer

Our partner is looking for a Trenches / Web3 Frontend Developer based in Spain. This is a high-ownership frontend engineering role focused on building the client experience for a fast-moving onchain trading terminal. The role combines advanced frontend engineering with deep Web3, trading, wallet, and real-time application expertise. The environment is remote-first, AI-native, and designed for engineers who thrive with significant ownership and limited bureaucracy. Your work will directly influence trading performance, execution quality, user experience, and revenue-generating product surfaces. Own the frontend client experience for trenches trading, perpetuals, and prediction markets across Solana and EVM. Take end-to-end ownership of at least one revenue-generating product surface, from identifying opportunities and proposing solutions through development, production deployment, and optimization. Build and improve latency-sensitive trading experiences, including live data, execution, fill-quality UX, snipe controls, order flow, transaction states, and responsive interactions. Optimize browser and frontend performance using technologies and patterns such as WebSockets, RPC streams, optimistic UI, reconnection strategies, and backpressure management. Own measurable frontend performance outcomes, including p95 time-to-interactive and time-to-fill. Own production quality for the surfaces you deliver, reducing defect rates and preventing recurring incidents. Use strong product judgment to determine what should be built, particularly where latency, execution quality, and trader experience are critical. Work closely with frontend, UX, backend, and DevOps colleagues in a compact, cross-functional engineering environment. Use AI-native development practices to accelerate delivery while maintaining rigorous technical review and accountability for production quality. 3+ years of relevant frontend engineering experience, with demonstrated ownership of production-grade Web3 or onchain products. Genuine familiarity with onchain trading and its mechanics, including fills, slippage, priority fees, execution quality, and transaction behavior. Strong frontend engineering expertise in real-time and latency-sensitive applications, including WebSockets, RPC streams, optimistic interfaces, reconnection, and backpressure. Ability to understand and diagnose frontend performance issues at a systems level rather than relying solely on established recipes or patterns. Experience with mobile or cross-platform delivery is valuable, particularly maintaining feature parity across web and mobile applications. Strong understanding of modern frontend development practices and the ability to deliver reliable production software in a fast-paced environment. Comfortable working remotely with reasonable overlap across global time zones. Fully remote, remote-first working environment. Premium health, dental, and life insurance in applicable countries. Close collaboration with a small, highly technical team and direct access to senior product and engineering leadership. Data Privacy Notice: By submitting your application, you acknowledge that Jobgether will process your personal data to evaluate your candidacy and share relevant information with the hiring employer. This processing is based on legitimate interest and pre-contractual measures under applicable data protection laws (including GDPR). If you would like more information about how your data is processed, please contact us. #