Senior Software Engineer - Web

Wire

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Location: Germany, Berlin, Remote, United Kingdom, France
Job Type: full-time
Salary: Unknown
Posted: March 14, 2026

Job Description

WHO WE ARE

At Wire, we're on a mission to revolutionize secure collaboration, making privacy the foundation of modern communication. Join us to play an important role in our dynamic team.

Wire is the leading end-to-end encrypted communication platform, trusted by businesses, critical infrastructure providers, and governments worldwide. We prioritize privacy as a fundamental right, delivering the most secure communication experience across various industries. Our cutting-edge encryption technology and robust security measures have made us a trusted partner in the technology, finance, healthcare, and government sectors. If you're passionate about redefining secure communication and want to be part of an innovative team, join us as a Senior Software Engineer - Web. Together, let's build a world where privacy and security shape the future of communication.

GENERAL INFORMATION

Employment Type: Permanent
Previous working experience: 10+ years in Frontend or Full-stack development, with significant time in Senior or Tech Lead roles.
Working hours: 40hrs/week
Working Location: Berlin Office, Remote within Germany or EU
Reports to: Engineering Manager - Web
Desired start date: asap

YOUR CHALLENGE AT WIRE

As a Senior Software Engineer - Web at Wire, you’ll drive technical direction across our React-based apps and our Electron-based desktop client. You’ll collaborate closely with Product, Design and other Development teams to translate complex requirements into robust technical solutions.

WHAT YOU WILL DO IN DETAILS

Real-time messaging and encrypted media exchange using cutting-edge standards like MLS
Performance-focused improvements on message processing, rendering, synchronization, and offline-capable workflows across platforms and sessions
Leading technical initiatives with Senior Engineers, Staff Engineer and Engineering Manager to improve architecture and developer experience
Defining and driving technical initiatives that improve app scalability, reliability, and maintainability — including modernizing legacy areas
Driving architectural decisions and raising the technical bar through well-reasoned RFCs and ADRs, thoughtful code reviews, and a collaborative, communicative mindset
Supporting and mentoring other engineers — helping them grow, share context, and take on broader ownership

YOUR PROFILE

You’ve built and maintained complex frontend systems across web and desktop environments and know what it means to carry a feature from rough idea to production. You think in systems, advocate for your decisions with clarity, and know how to move teams forward — even when the path isn’t obvious.

Technical Skills

Expert-level knowledge of React and frontend architecture
Hands-on experience with Electron, including security constraints (IPC design, preload boundaries, protocol handling, signing/notarization) is a strong plus
Strong experience diagnosing and fixing performance and memory issues in real-time applications — including large lists, background processing, CPU vs memory trade-offs and data-processing flows.
Experience working with local client-side databases (e.g., IndexedDB or alternatives), Web Workers, WASM-based libraries, and large in-browser data sets
Familiarity with secure messaging protocols (e.g., MLS, WebRTC, or E2EE media flows) is a strong plus
Experience working in modular and multi-package codebases, including monorepos, using tooling like Webpack, npm scripts, and shared frontend infrastructure
Experience owning or significantly contributing to CI/CD and release pipelines (GitHub Actions, Jenkins)
Strong testing practices with unit, integration and e2e test coverage (e.g., Playwright)

Soft Skills

You are fluent in English and can contribute effectively to an international team.
You mentor by providing context, not just answers — helping others build judgment, not dependency.
You can break down complex trade-offs and drive alignment without shutting down alternative views.
You are proactive — when you spot tech debt or poor architecture, you don’t wait for someone to ask. You take initiative.
You take ownership of problems you didn’t create — and see them through to resolution.
You challenge ideas rigorously while remaining respectful — and expect the same from others.

WHY WIRE?

Join a market-proven (>1,000 customers) company and drive Wire to become the worldwide market leader.
Enjoy a yearly education budget of 1000 EUR to strengthen personal capabilities.
With an Urban Sports Club subscription, stay balanced and mentally and physically healthy!
Work from a beautiful office in the heart of Berlin or choose a mix of working from anywhere vs. spending selected days together in our office to connect on a personal level
Enjoy fresh breakfast in the office, daily fruits, snacks, free soft drinks, and the world's best Barista coffee machine.
Wire is an equal opportunities employer and does not discriminate on the grounds of gender, civil status, family status, sexual orientation, religion, age, disability, or race.

If you are a seasoned engineer with a proven track record of driving technical innovation while delivering on the product roadmap, we encourage you to apply and join our dedicated team at Wire.

About us

We're building a secure, easy-to-use, and feature-rich communication tool with the latest technologies. We don't just create software — we're also impacting national and international committees. Our research and development occur at our Berlin headquarters and other locations in Europe and the USA, where we embrace diversity and adhere to the strictest data protection standards. We see regulations as a foundation supporting our commitment to secure our customer's communication.

🎯 Who is this job for?

This role is ideal for a Senior/Staff Frontend Engineer with 10+ years of experience building complex web or desktop applications using React and modern frontend architecture. It suits someone comfortable designing scalable real-time systems, optimizing performance for large datasets, and working with technologies like Electron, Web Workers, IndexedDB, and CI/CD pipelines. You should be able to lead architectural initiatives, mentor engineers, modernize legacy systems, and build secure communication features such as real-time messaging and end-to-end encrypted workflows.

💬 Potential Interview Questions

How would you design a scalable frontend architecture for a real-time messaging application built with React?
I would separate UI components, state management, and data synchronization layers while optimizing rendering performance for high-frequency updates. Efficient state handling, virtualization for message lists, and asynchronous processing help maintain responsiveness.
What challenges arise when building real-time messaging interfaces, and how do you solve them?
Real-time apps must handle synchronization, latency, and message ordering across multiple sessions. I use event-driven updates, optimistic UI patterns, and robust retry or reconciliation strategies to maintain consistency.
How do you optimize performance in applications handling large message histories or large datasets in the browser?
I use list virtualization, incremental rendering, and background processing with Web Workers. Efficient caching and careful memory management prevent performance degradation.
Describe your experience working with Electron for cross-platform desktop applications.
Electron allows web technologies to power desktop apps but requires careful design around security boundaries, IPC communication, and resource usage. Separating main and renderer processes ensures security and maintainability.
How do you debug and resolve performance or memory issues in complex web applications?
I analyze browser performance tools, memory snapshots, and profiling data to identify inefficient rendering or memory leaks. After isolating the issue, I refactor the relevant components or processing logic.
What role do local databases like IndexedDB play in modern web applications?
They enable offline capabilities, faster local data access, and efficient synchronization with remote services. Proper indexing and data lifecycle management are key for performance.
How would you approach building secure communication features such as end-to-end encrypted messaging?
I design the application so that encryption happens client-side and keys remain protected. Careful protocol implementation and strict security reviews are essential to prevent vulnerabilities.
How do you ensure code quality and maintainability in large frontend codebases?
I enforce consistent architecture patterns, maintain strong automated testing coverage, and encourage thoughtful code reviews. Clear documentation and modular code structure make long-term maintenance easier.
How do you lead technical initiatives and drive architectural improvements across teams?
I propose improvements through well-documented technical proposals, gather feedback, and guide implementation collaboratively. Transparent decision-making helps teams align on long-term technical direction.
How do you mentor engineers and help elevate technical standards across a team?
I provide context in code reviews, share architectural reasoning, and encourage collaborative problem-solving. The goal is to help engineers build independent judgment and confidence in technical decisions.

📋 Job Summary

Wire is a leading end-to-end encrypted collaboration platform trusted by enterprises, critical infrastructure providers, and governments worldwide. We’re hiring a Senior Software Engineer – Web (Remote in EU/UK or Berlin) to drive architecture and performance improvements across React-based web apps and the Electron desktop client. You’ll design scalable, secure real-time messaging systems, modernize legacy code, and mentor engineers while working with technologies like React, Electron, Web Workers, IndexedDB, and Playwright. Join Wire to help shape the future of privacy-first communication while working in an international team with flexible remote work and strong professional development support.