Senior Software Engineer - P2P (100% Remote)

Tether EV; A distancia; EUR 60.000 - 80.000; Jornada completa

Descripción de la vacante

A cutting-edge fintech company based in Barcelona seeks an experienced full-stack developer to build decentralized communication tools. The ideal candidate will have over 5 years of professional experience, strong skills in React Native, and a passion for developing cross-platform applications. This is a fully remote role, offering the chance to innovate in peer-to-peer technologies. Join a global team aiming to shape the future of digital finance.

Formación

• 5+ years of professional software engineering experience.
• Strong production experience with React Native and/or Electron.
• Experience designing and building local-first applications.

Responsabilidades

• Build and maintain flagship desktop and mobile applications.
• Design cross-platform UX for file sharing, messaging, and video calls.
• Integrate and extend the Pear Runtime / Holepunch stack.

Conocimientos

React Native

JavaScript

Node.js

cross-platform development

asynchronous programming

communication skills

Descripción del empleo

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

At Tether, we’re building the next generation of decentralized, peer‑to‑peer communication and data‑sharing tools (including KEET and future products) on top of cutting‑edge P2P technology.

We are looking for an experienced full‑stack/mobile/desktop developer who loves shipping rock‑solid cross‑platform applications and has a strong interest (or existing experience) in peer‑to‑peer and distributed systems.

You’ll work in a small, high‑impact team alongside the core Holepunch engineers, helping bring fully decentralized apps to hundreds of millions of users worldwide.

Responsibilities

• Build and maintain flagship desktop (Electron) and mobile (React Native) applications that run fully peer‑to‑peer with zero central servers.
• Design beautiful, performant cross‑platform UX for file sharing, messaging, video calls, and collaborative tools.
• Integrate and extend the Pear Runtime / Holepunch stack (Hypercore, Hyperdrive, Hyperswarm, etc.).
• Ship new features rapidly, participate in code reviews, write tests, and optimize performance.
• Help external partners and the open‑source community build on the platform.
• Occasionally contribute improvements and bug fixes back to the underlying open‑source modules.

Qualifications

• 5+ years of professional software engineering experience
• Strong production experience with React Native and/or Electron (shipping apps that real users love)
• Very comfortable with Node.js and modern JavaScript/TypeScript ecosystems
• Proven experience designing and building local‑first applications where the local data model is the primary source of truth.
• Hands‑on experience with local‑first data technologies (storage, conflict resolution, event sourcing, etc.)
• Familiarity with cross‑platform packaging & deployment
• Familiarity with end‑to‑end encryption and secure local storage.
• Solid grasp of asynchronous programming, networking, and data synchronization concepts
• Experience with git, code reviews, CI/CD, and collaborative open‑source workflows
• Excellent communication skills (fully remote, global team)

Nice‑to‑have

• Background in building productivity tools, media players or developer tools.
• Knowledge of streaming protocols
• Experience with file system integrations
• Experience designing synchronization processes (background sync, sync queues, retry, etc.)

Important information for candidates

Recruitment scams have become increasingly common. To protect yourself, please keep the following in mind when applying for roles:

• Apply only through our official channels. We do not use third‑party platforms or agencies for recruitment unless clearly stated.
• All open roles are listed on our official careers page.
• Verify the recruiter's identity. All our recruiters have verified LinkedIn profiles.
• If you’re unsure, you can confirm their identity by checking their profile or contacting us through our website.
• Be cautious of unusual communication methods. We do not conduct interviews over WhatsApp, Telegram, or SMS.
• All communication is done through official company emails and platforms.
• Double‑check email addresses. All communication from us will come from emails ending @tether.io.
• We will never request payment or financial details. If someone asks for personal financial information or payment at any point during the hiring process, it is a scam.
• Please report it immediately.
• When in doubt, feel free to reach out through our official website.

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