Senior Full-Stack Engineer

**Tuyo** Senior Full-Stack Engineer; up to $250K (Miami) / ~$100-150K (Madrid) + 0.3-0.6% equity; Madrid / Miami (On-site)

**About Company** Tuyo is building the future of money: a fully global, non-custodial app that works like a bank account inside your phone, with no bank in the middle. Users stay in control of their money and can spend and move it instantly and for free across borders — without dealing with the usual complexity of crypto or self-custody. Tuyo stays fully self-custodial — users always control their own funds and can withdraw in crypto anytime; it removes the friction, not the control. It's crypto-heavy at its core but feels completely familiar to a mainstream user. Today Tuyo serves thousands of customers across 130+ countries, with a current growth focus on young adults in the US.

Tuyo recently closed a $5M seed round (not yet announced) from leading US and European investors, giving it years of runway. It's a small, highly technical team — currently three full-time engineers — that ships fast and cares deeply about how the product feels to use.

Founders: Jorge Izquierdo (CEO) co-founded Aragon, building core early-Ethereum infrastructure that holds $30B+ in value. Alejandro Perezpayá was the youngest executive at Allfunds, a European bank with $1.5T under management.

**About the Role** The second of two equal-priority founding-level hires. A senior, generalist full-stack engineer who owns features end-to-end across Tuyo's stack — backend (Node/TypeScript), app, and integrations — rather than being tied to one layer. Same shared-ownership model, same bar on quality and speed. This funnel captures strong generalist engineers; it overlaps heavily with the React Native role.

**Responsibilities** - Own and ship features end-to-end across the stack, from backend and APIs to the app layer. - Write clean, reliable TypeScript that scales with the product and team. - Work directly with founders, product, and design; move fast from concept to production. - Make pragmatic architecture decisions and help set engineering standards and tooling. - Contribute to product quality and polish across all touchpoints. - Debug and reason through complex product and technical problems end-to-end.

**Required Skills** A. 5+ years of professional software engineering experience shipping production software. B. Strong full-stack ability — comfortable across backend and frontend; fast to learn new tech. C. Deep proficiency in JavaScript/TypeScript (Node.js on the backend).

**Bonus Skills** - React / React Native. - EVM / Solidity or other crypto experience (a plus, not required). - Infrastructure: AWS, Kubernetes, Terraform. - Consumer product / fintech experience. - Early-stage startup experience; helped define engineering culture or standards.

**Logistical Info** - Location: Madrid or Miami. In-office every day, with ~25% of days at the employee's discretion to work elsewhere. Candidates unwilling to relocate to Madrid or Miami won't be considered. - Compensation: Miami up to $250K base; Madrid ~$100K-$150K USD. Equity ~0.3%-0.6% at this stage. - Number of openings: 1 - **Other:** Significant equity ownership; large individual AI-tooling budget; relocation expected for non-local candidates.

**Ideal Background** - Strongest signal — founded or been part of an early-stage startup; arrives with the "operating mindset" installed. These people are usually the most successful at Tuyo. - Crypto-native (e.g. MetaMask) or top consumer-fintech (e.g. Revolut) can fit — but a strong engineer from an unknown company is often a better bet than someone who's gone big-company to big-company. - Senior, product-minded engineers who care what users actually experience, not just whether the code works. - Crypto experience is a plus, not a requirement — genuine interest is enough.

**Green Flags** - Founder mindset: high agency, extreme ownership, low ego; thrives in a scrappy, fast team. - Ships end-to-end and fast; strong product taste and attention to detail. - Kind, easy to work with, high energy, genuinely excited about Tuyo's mission. - High commitment — front-lines work, not a 9-5. - Already leveraging AI heavily to increase output.

**Red Flags** - Career spent going big-company to big-company; corporate baggage; expects a structured 9-5. - Only comfortable in a narrow, siloed role rather than owning features end-to-end. - Low energy or weak values/culture fit. - Unwilling to relocate or be in-office in Madrid/Miami.

**Interview Process** 1. First interview — either with Jorge (CEO) or an initial technical interview with the Head of Engineering. 2. Call with the founders. 3. Half-day to full-day on-site with the team before an offer.