Senior Frontend Engineer – SDE4

Role Overview

• Build and deliver new frontend features for the webmail client — mail, calendar, contacts, and settings — with a strong focus on quality, usability, performance, and maintainability.
• Work on real-time, sync-heavy user flows, including live mailbox updates, push notifications, optimistic UI, and streaming responses.
• Collaborate across teams to shape solutions that fit the product architecture and support smooth integration.
• Break down features into clear implementation steps, lead or contribute to kickoff discussions, and align with business and engineering expectations.
• Write unit and end-to-end tests for delivered functionality; E2E quality is a standard part of engineering work in the team.
• Participate in code reviews and provide thoughtful feedback that improves both code quality and team consistency.
• Take ownership of implementation and architecture decisions, identify risks early, and communicate clearly with teammates and stakeholders.
• Contribute to the NestJS BFF and JMAP gateway services where needed — backend contribution is a welcome part of this role.

Requirements

• 6+ years of hands-on experience with React in production environments, including modern build tooling such as Vite.
• Strong and confident TypeScript knowledge, including deep understanding of typing, architecture decisions, and maintainable code design.
• Experience building modern frontend applications with clear component structure, solid state management, and API integration — ideally data-heavy or real-time products.
• Practical experience with testing, including unit tests and E2E tests in tools such as Playwright.
• Ability to work independently on features: understand the problem, decompose the work, propose an approach, and drive execution.
• Demonstrated technical leadership: mentoring peers, driving architecture decisions, and raising the quality bar through reviews.
• Strong collaboration skills and readiness to work in a cross-team environment with frequent communication.
• Upper-Intermediate English or higher for day-to-day communication in an international company.
• Solid backend development in Node.js/TypeScript, ideally with NestJS — you will be able to contribute meaningfully to the BFF and JMAP gateway services, which is a strong plus for this role.
• Familiarity with email or sync-heavy domains: JMAP , IMAP/SMTP , CalDAV/CardDAV, or comparable real-time/offline-capable products.
• Experience with MUI (Material UI) and design-system/theming work.
• Experience with AI features, LLM integrations, streaming UIs, or agent-like product experiences.
• Exposure to microservices environments or event-driven systems.
• Experience building accessible interfaces (WCAG 2.1 AA).
• Experience working in fast-growing products where requirements evolve quickly.

Tech Stack

• JavaScript
• Material UI
• Microservices
• Node.js
• React
• SMTP
• TypeScript

Benefits

• Full medical insurance
• MacBook & accessories
• English lessons
• Accountant assistance
• Minimal bureaucracy, synergy, and formalities, primarily focusing on effective communication