Developer javascript Jobs in Berlin

Join Tether and Shape the Future of Digital Finance

At Tether, we’re not just building products, we’re pioneering a global financial revolution. Our cutting-edge solutions empower businesses—from exchanges and wallets to payment processors and ATMs—to seamlessly integrate reserve-backed tokens across blockchains. By harnessing the power of blockchain technology, Tether enables you to store, send, and receive digital tokens instantly, securely, and globally, all at a fraction of the cost. Transparency is the bedrock of everything we do, ensuring trust in every transaction.

Innovate with Tether

Tether Finance: Our innovative product suite features the world’s most trusted stablecoin, USDT, relied upon by hundreds of millions worldwide, alongside pioneering digital asset tokenization services.

But that’s just the beginning:

Tether Power: Driving sustainable growth, our energy solutions optimize excess power for Bitcoin mining using eco-friendly practices in state-of-the-art, geo-diverse facilities.

Tether Data: Fueling breakthroughs in AI and peer-to-peer technology, we reduce infrastructure costs and enhance global communications with cutting-edge solutions like KEET, our flagship app that redefines secure and private data sharing.

Tether Education: Democratizing access to top-tier digital learning, we empower individuals to thrive in the digital and gig economies, driving global growth and opportunity.

Tether Evolution: At the intersection of technology and human potential, we are pushing the boundaries of what is possible, crafting a future where innovation and human capabilities merge in powerful, unprecedented ways.

Why Join Us?

Our team is a global talent powerhouse, working remotely from every corner of the world. If you’re passionate about making a mark in the fintech space, this is your opportunity to collaborate with some of the brightest minds, pushing boundaries and setting new standards. We’ve grown fast, stayed lean, and secured our place as a leader in the industry.

If you have excellent English communication skills and are ready to contribute to the most innovative platform on the planet, Tether is the place for you.

Are you ready to be part of the future?

About the job

We need someone who is equally comfortable writing C and JavaScript. The Bare team builds and maintains the runtime itself along with a growing ecosystem of native modules (bare-bluetooth, bare-tcp, bare-fs, bare-crypto, and many more). You would be writing native addons that bridge platform APIs into JavaScript, debugging across multiple operating systems, and helping keep the runtime small and correct.

This is a hands-on systems role. You will work independently, own modules end to end, and ship code that runs on phones, laptops, servers, and constrained devices.

Native module development

• Design, implement, and ship bare-* native modules (e.g., bare-bluetooth, bare-tcp, bare-fs, bare-crypto) end to end, including code, and tests

• Write C native addons that bridge platform APIs (Bluetooth, networking, filesystem, crypto) into JavaScript

• Maintain and extend existing native modules based on product team requests and the bare-node compatibility list

Cross-platform builds and CI

• Set up and maintain cross-platform builds for macOS, Linux, Android (NDK), and iOS (Xcode)

• Own cross-compilation toolchain configuration for each target platform

• Maintain CI pipelines that build and test native modules across all supported platforms

• Investigate and fix platform-specific build failures and toolchain issues

Bare Runtime contributions

• Contribute to the Bare runtime core (module system, native addon system, light-weight threads)

• Help reduce the bare-node missing API surface

• Participate in evaluating and integrating alternative JS engines eg libjerry
  

Debugging and quality

• Debug native addon issues across multiple OS and device targets, including mobile

• Write and maintain tests for all modules

Collaboration and communication

• Respond to Bare team inquiries from internal teams and the public.

• Communicate progress, blockers, and decisions in writing .

• Participate in a weekly status call.

• Participate in Bare workshops and contribute to onboarding materials.

• Coordinate with product teams (Keet, WDK/Wallet).

• Strong C programming skills, including experience writing and debugging native code across platforms.

• Advanced JavaScript skills with a solid understanding of Node.js internals and the module ecosystem.

• Experience building native addons for Node.js or similar runtimes (N-API, node-gyp, or equivalent).

• Familiarity with libuv or other asynchronous I/O frameworks.

• Comfortable working across macOS, Linux, Android, and iOS build toolchains.

• Experience with cross-compilation and platform-specific system APIs (Bluetooth, networking, filesystem).

• Ability to read and navigate large C and C++ codebases.

• Self-directed work style with strong written communication skills.