Full-Stack Developer

Senior Full-Stack Software Engineer Lisbon, Portugal (Hybrid – remote start possible) | Full-time, Permanent Competitive salary with potential share options for high-impact talentAbout UsMillions of triathletes, runners, and cyclists train indoors on Zwift, MyWhoosh, Rouvy, and Peloton, with fitness gaming exploding, but swimmers have been left behind.We're changing that.We're building the world's first Virtual Swimming platform, connecting smart equipment, real-time performance data, and immersive gameplay to make swim training as engaging, measurable, and social as every other sport.Over 20,000 triathletes, swimmers, and surfers already train using our first product.Our first Virtual Swimming MVP is live, evolving fast, and preparing for launch.We're now assembling a high-performance team of developers, engineers, and innovators to bring this new category to life.The RoleWe're looking for a Senior Full-Stack Software Engineer who thrives in fast-moving, high-growth environments and loves working across web and mobile platforms.You'll help shape the architecture and user experience of our connected ecosystem, integrating real-time data, gameplay, and community features across web, iOS, and Android.You'll work closely with gameplay engineers, designers, and product leads to:Build and optimize scalable web and mobile applications using React, React Native, Node.Js, and TypeScript.Integrate hardware data and real-time performance metrics into mobile and web experiences.Contribute to architecture decisions and development standards as we scale.Ensure smooth deployment and performance in AWS.Collaborate in person from our Lisbon HQ at least three days a week once settled.This role suits someone hands-on, collaborative, and comfortable owning features end to end, from backend APIs to frontend delivery.You'll Bring5+ years of experience in full-stack or backend-heavy roles.Strong proficiency in React, React Native, Node.Js, and TypeScript.Proven experience shipping mobile apps (App Store / Play Store).Solid understanding of RESTful APIs, real-time communication, and websockets.Experience with AWS (Lambda, API Gateway, DynamoDB, S3, CloudFront).Comfort using AI-assisted coding tools (e.G. Copilot, Claude).Experience with automation tools like n8n, Zapier, or Make.A startup mindset – you move fast, take ownership, and make things happen.Bonus Points If YouWorked with IoT, BLE, or connected-fitness hardware.Built or played with Unreal Engine, multiplayer, or game telemetry.Have a passion for triathlon, swimming, cycling, or sports in general.Our CultureWe take ownership.We move fast.We back each other.We keep leveling up.We enjoy the ride.Benefits & Perks27 paid vacation days + flexible hours (we train too).Performance-based rewards and potential equity opportunities for the right talent.Fitness partner discounts and full access to our gear.Work directly with elite triathletes and performance experts.Meal allowance and a hybrid setup: typically 3 days in the office, 2 remote, with flexibility when sprint cycles demand deeper focus or collaboration. Apply now: ******Use the subject line: Senior Full-Stack Engineer – [Your Name]Tell us why this excites you and what you'd bring to the team and our community.Once we connect, we'll share the full detailed JD and technical brief so you can explore the role in depth.Let's go.Excited to hear from you!