Senior Full Stack Engineer (Elixir Backend Focus)

Title: Full Stack Engineer (Elixir Backend Focus) Location: Remote (Zug, Switzerland) We're looking for a **AI-first Full Stack Engineer** with a strong **backend** and **Elixir** expertise to own partner APIs and dashboards that power the qiibee ecosystem **(partnered Miles & More, Etihad Guest, and more).** In this role, you'll combine deep backend expertise with AI-powered workflows to take features through every stage — from architecture and coding to deployment, monitoring and ongoing improvement — across a double-entry ledger, partner-facing APIs and the React interfaces on top of them. You'll be a key point of ownership for our core platform, ensuring every partner integration is correct, reliable and well documented — **supported by AI at every step.** ## Tasks * Design, build and operate **Elixir** services with Phoenix, Ecto and OTP: APIs, workers and background jobs. * Build and evolve our partner-facing **REST APIs**, including versioning, outbound webhooks and delivery guarantees. * Work on money-adjacent systems where correctness comes first: ledgers, points balances, settlement and reconciliation. * Own frontend features end to end in **React** and **TypeScript**, from the admin and partner dashboards to the API behind them. * Use AI coding agents **(Claude Code)** daily to move faster, while reviewing their output. * Review code substantively, and act as a second pair of eyes on system correctness. * Write the reasoning down: clear PR descriptions, architecture notes, and docs updated in the same pull request as the code. * Collaborate with product and our infrastructure team on deployment, monitoring and security on **AWS**. ## Requirements * **AI first:** Use AI coding tools (Claude Code, Cursor or similar) every day. * 6+ years of professional software engineering, with 4+ years on the backend. * 3+ years of production **Elixir with Phoenix**, Ecto and OTP, shipped and operated, not learned on the side. * Strong PostgreSQL: real SQL, transaction semantics and performance tuning. * Solid **REST API** design and background job processing (Oban or equivalent) with retries. * Proven experience in the loyalty, travel tech, payments or FinTech industries. * 3+ years of React and TypeScript, strong enough to own a frontend feature outright: components, state, forms, validation and error handling. * Working knowledge of AWS (ECS, RDS, S3), Docker and CI/CD with GitHub Actions. * Fluent in English **Nice to have 🎯** * Built features on top of LLM APIs or AI agent workflows * Redux Toolkit / RTK Query, LiveView, Node.js (Express) or GraphQL. * Multi-tenant B2B platforms, multi-region architectures, observability (AppSignal, Sentry, Datadog) and SOC 2 exposure. ## Benefits **🚀 Benefits:** * **Fully remote work** * Competitive monthly salary package * **Equity share** and qiibee tokens (QBX), sharing in our success * Fast-paced remote startup environment 💫 **About us:** At qiibee, we're on a mission to turn loyalty currencies into one of the **world's largest payment methods.** Our points exchange platform lets businesses and loyalty programs issue and redeem loyalty rewards instantly, unlocking real purchasing power and economic freedom for their members. We're an **AI-first,** international team, building an increasingly agentic company where AI handles the busywork so our people can focus on what matters most: our customers. We're looking for ambitious, high-performing people who are eager for growth, challenges, and continuous learning to help us turn our vision into reality. If this sounds like your dream job, **we would love to hear from you! 🌟**