3 months ago
Remote, Ireland or Dublin, IrelandMid Level
Responsibilities
- Design, build, and operate end-to-end features from accessible React and TypeScript interfaces through Elixir/Phoenix services, pipelines, and data stores.
- Build AI-powered product features including streaming responses, AI-driven personalization, and production guardrails for non-deterministic behavior.
- Develop and maintain the React dashboard, performance-critical JavaScript SDK, real-time backend services, WebSocket infrastructure, and analytics pipelines.
- Optimize frontend bundle size, rendering efficiency, and Core Web Vitals alongside backend throughput, correctness, and reliability.
- Translate product specifications and design mockups into production features using client-side state management and server-side OTP, queue, and write-buffer patterns.
- Contribute to agentic development infrastructure, including AGENTS.md, CLAUDE.md, DESIGN.md, slash commands, and architectural rules.
- Review code for architectural consistency, maintainability, and adherence to system boundaries across React and Elixir/OTP codebases.
- Participate in a spec-driven development process and contribute to technical leadership and developer experience improvements.
Requirements
- At least 3 years of experience building and shipping production software, with hands-on frontend and backend experience.
- Production experience with React and TypeScript, including component design, hooks, rendering behavior, and state management with React Query, Redux, or Redux-Saga.
- Strong computer science fundamentals and professional experience building backend services in Elixir, Ruby, Python, Go, or a similar high-level language.
- Experience working with databases, queues, or real-time systems.
- Experience building or integrating LLM-powered features such as streaming responses or AI-driven personalization, or designing for non-deterministic behavior.
- Regular use of AI coding agents such as Claude Code or Cursor, with the ability to critically review and challenge generated output.
- Strong product judgment, user-experience awareness, system-correctness focus, self-management, and continuous-improvement mindset.
- Preferred experience includes Elixir, Phoenix, OTP, reliable real-time systems at scale, Kafka, RabbitMQ, ClickHouse, Broadway, MUI, monorepo tooling, Chrome Extensions, SDKs, embeddable scripts, agentic infrastructure, cloud cost optimization, technical leadership, open-source contributions, and unit, integration, or end-to-end testing.
Benefits
- Candidates must have the right to work in Ireland.
- The role does not offer visa sponsorship.
- Userpilot states that it is an equal opportunity employer and is committed to an inclusive workplace.
Tech Stack
Apache KafkaAWSClickHouseDockerElixirGitHub ActionsJavaScriptKubernetesMySQLPhoenixRabbitMQReactReduxTypeScript
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