Senior Fullstack Engineer - Lingo.dev

About the Project & Team

We started Lingo.dev at a hackathon and, after winning the best dev tool award, we just kept building. It evolved into a developer-loved toolkit with hundreds of active users, 7,000 weekly CLI runs, 5,000 GitHub stars, and over 100 million translated words. We've graduated from Y Combinator and raised venture funding to continue building developer tools that must exist but don't yet.

We're a small, fully remote team of senior engineers who like to work hard on interesting problems. We value computer science craft over corporate politics and love building tools for developers - including ourselves. Recently we started getting more feature requests than we can ship, so we're excited to expand the team.

Please don't use AI to apply. We're an AI-native company, so we'll notice if you do. We want to know how you think and write.

Job Functions

• As part of a team of senior engineers, design, develop, and grow the Lingo.dev products:
  • Web applications: Routing, navigation, onboarding flows, user experience, performance
  • Open source tools: CLI, webpack/vite plugins
  • Backend APIs: Encapsulation, API design, security
  • Database layer (PostgreSQL)
  • Integrations: 3rd party systems
  • AI agents
• Take full ownership of features from design to deployment: draft technical designs, review with founders + the team, implement end-to-end with tests and documentation
• 3 sprints of product roadmap work, 1 cooldown sprint (customer feature requests, improvements, bug fixes)
• Weekly Demo Days with the rest of the team

Requirements

• Built an own app or side project that others have used—a tool for a friend, a small product, an open-source package, or anything real people relied on
• 5+ years of production experience with TypeScript and Node.js
• Expert React knowledge: Suspense-first patterns, skeleton loaders, loading states
• Experience with SSR, CSR, and SSG
• Deep expertise with React routing libraries
• Built or contributed to design systems / component libraries used by others
• Experience designing navigation, onboarding flows, and user journeys
• Backend experience with Node.js (Express.js or similar) and PostgreSQL
• Experience designing production-ready APIs
• Experience with authentication and authorization systems
• CS degree or equivalent: algorithms, data structures, system design
• Prior remote work experience in distributed teams
• Available 7–10am San Francisco time daily
• Fluent English
• Deep knowledge of AI coding tools and workflows—you use them daily and know how to get the most out of them

Optional Skills

• Experience with Cloudflare platform (Workers, etc.)
• Experience with Row-Level Security (RLS) in Supabase/PostgreSQL
• Experience with background job workflows
• Built an AI agent before
• Contributed to a design system or React component library used by other teams
• Experience with observability and monitoring
• Open source contributions
• Speaking multiple languages is a plus
• You love Remix, React Router, TanStack Router, or TanStack Start

Benefits

• Opportunity to work with latest, cutting-edge technologies
• Work directly with users using what you build every day
• Small team working directly with founders
• Be a part of an open-source community
• Occasional travel to meet the team in person
• Conference and learning budget
• Flexible working hours
• Competitive salary
• Health insurance

Interview Process

1. Screening Call (Technical/Cultural Fit)
2. Live Coding / Technical Project: Evaluating CS fundamentals and architectural depth (algorithms, system design)
3. Final Deep Dive (System Design & Partnership)

After passing the interviews, there's a one-month paid trial period to work closely together on real features.

Do Not Apply If

• You are looking for passive, hands-off remote work with minimal team interaction
• Uncertainty makes you uncomfortable—you prefer detailed specs over figuring things out as you go
• You are unwilling to prioritize customer needs over your preferred patterns or tools