Mozilla-posted 2 months ago
$150,000 - $175,000/Yr
Full-time • Senior
501-1,000 employees

MZLA Technologies Corporation (MZLA) is a wholly owned, for-profit subsidiary of the Mozilla Foundation and home to Thunderbird, our flagship open-source email and productivity platform empowering more than 20 million people around the world. While part of the Mozilla portfolio of companies, MZLA operates independently in both identity and organizational structure from the Mozilla Foundation and Mozilla Corporation. Everything we build at MZLA is open source, developed transparently and in collaboration with a global community of contributors. This open approach shapes not only our products but also how we work: collaboratively, inclusively, and with a shared commitment to building technology that puts users first. We believe privacy and productivity should coexist, and that people deserve powerful digital tools without surrendering control of their data. MZLA is a small but growing team of 50+ people distributed across seven countries. As we evolve Thunderbird from a single application into a suite of privacy-respecting productivity tools, we’re introducing new products and services that remain independent of big tech ecosystems. Our unique revenue model combines community donations that keep Thunderbird freely available with subscriptions for new cloud-based services, allowing us to grow and innovate while remaining independent and true to our values.

  • Design and implement end-to-end features across the stack.
  • Make architectural decisions that influence the entire product.
  • Build responsive UIs in React using modern patterns (hooks, server components, streaming).
  • Develop local-first data sync and storage strategies.
  • Integrate AI/LLM capabilities (streaming, embeddings, agentic workflows).
  • Create cross-platform desktop experiences with Tauri.
  • Implement email parsing, IMAP sync, and message intelligence.
  • Build real-time features using WebSockets and server-sent events.
  • Optimize performance for on-device ML inference.
  • Own the full product development cycle — from concept to release.
  • 10+ years of professional software development experience
  • 5+ years focused on frontend development
  • 3+ years of experience with React
  • 3+ years of experience with TypeScript
  • Experience delivering vertically integrated features across the stack (monorepo environments a plus)
  • Strong system design skills — data flow, state management, caching, and API design
  • Strong product sense — attention to UX, reducing friction, and thinking beyond specs
  • Experience with AI product development (at least 1 year preferred)
  • Fast learner with a growth mindset — comfortable working with emerging tools and technologies
  • Excellent written and verbal communication skills
  • Proven ability to collaborate with developers, designers, and product managers
  • Commitment to open-source development and open standards
  • Experience with local-first architectures (CRDTs, SQLite, IndexedDB)
  • Building cross-platform apps (Electron, Tauri, React Native, etc.)
  • Working with AI/LLM APIs (OpenAI, Anthropic, local models)
  • Previous contributions to open-source projects or communities
  • Experience leading open-source project initiatives
  • Fully remote work & schedule flexibility
  • Latest Laptop
  • Remote Work Stipend
  • Professional Development Stipend
  • Access to Udemy Learning Platform
  • Industry Conferences
  • Company All Hands
  • 24 days PTO per year (prorated)
  • Your Birthday
  • Year-end Company Shutdown
  • Wellbeing Days
  • Public Holidays
  • Other Paid Leave
  • Wellbeing Stipend for Personal / Family Activities
  • 401(k) Contributions
  • Health, Dental, & Vision Insurance
  • Disability Insurance
  • Life Insurance
  • Employee Assistance Program
  • Paid Parental Leave
  • Paid Sick Days
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