Role: Senior React/Electron Desktop Engineer (Secure Messenger) — Remote

We are:

The company is a dynamic tech company specializing in big-data analysis and secure messaging. Our flagship product is a comprehensive secure messaging solution used in security-sensitive environments.

Role Summary:

We are hiring a Desktop Engineer to own and strengthen the Electron-based desktop client of our secure messenger. Your primary mission is to ensure a stable, performant, and secure desktop experience and reliable synchronization with the rest of the system (in particular via XMPP/WebSockets) while working closely with our Android and iOS teams.

Key Responsibilities:

Develop and maintain the desktop client using Electron + React + TypeScript.
Ensure reliable real-time communication and synchronization with the backend and mobile clients (XMPP/WebSockets).
Design and implement robust connection health behavior (heartbeats, reconnect logic, backoff strategies, offline handling).
Improve UI performance for large datasets (chat lists, long message threads) using virtualization and efficient rendering strategies.
Work with local data storage (SQLite) and write efficient queries for pagination, filtering, and fast loading (avoid “load-all-and-sort-in-JS” patterns).
Collaborate with mobile engineers (Android/iOS) to ensure feature parity and consistent behavior across clients.
Contribute to security best practices (safe handling of sensitive data, minimal logging exposure, secure client boundaries).

Must-Have Requirements:

3+ years of professional experience building desktop or complex web applications with:
- Electron, TypeScript, React
- State management: Redux / Redux Toolkit
- Node.js fundamentals
Strong analytical and problem-solving skills; ability to debug complex client-sync issues.
Strong communication skills and ability to work in a distributed team.
English proficiency (C1 / Advanced).

Highly Desirable:

Practical experience with XMPP (or comparable real-time messaging protocols).
Experience building products from scratch and/or white-label applications.
Strong SQL / SQLite knowledge: indexes, pagination patterns, query optimization.
Experience in messenger or real-time collaboration products (chat, calls, presence, sync).
Experience with Material UI (or similar component systems).
Familiarity with encryption concepts and secure client design (e.g., encrypt/decrypt boundaries, key handling, avoiding sensitive-data leakage).

Location / Working Model:

Fully remote
International team environment

As part of the process, candidates will complete a short technical assignment and share a public GitHub repository: https://docs.google.com/document/d/13TgfqJPD6HMhaScRrcIP7M0SdGTaz2GIEQyq9HTWNW8/edit?tab=t.0
To apply, please send your CV (and portfolio/GitHub if available).