Javascript Senior Software Engineer (AI SDK) (100% remote)

Tether.io; Netherlands; Remote; EUR 85,690 - 145,673; Full time

Job summary

A leading fintech company is seeking a Senior SDK Developer to create innovative SDKs for their AI platform. You will ensure performance, reliability, and security in the SDK architecture. The ideal candidate has over 6 years of experience with Nodejs/JavaScript and a strong background in developer-facing SDKs. Join us to drive the future of digital finance with cutting-edge technology.

Qualifications

• 6+ years of experience working with Nodejs/JavaScript in production environments.
• Proven track record in designing and maintaining developer-facing SDKs.
• Strong understanding of modular architecture, versioning strategies, and semantic API design.

Responsibilities

• Develop and maintain modular, versioned SDKs for Tether's platform.
• Design resilient logic to ensure SDK performance and reliability at scale.
• Embed security practices in SDK architecture.

Skills

Nodejs

JavaScript

SDK design and maintenance

Security practices

AI domain applications

Modular architecture

Tools

NPM packages

API clients

Job description

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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:

As a Senior SDK Developer, you will be a part of the team that works on the development of the new and cutting edge Tether AI SDK.

• Developer-Facing SDKs & APIs: Tether is committed to delivering world-class developer experiences through robust and intuitive SDKs. You will design, build, and maintain modular, versioned SDKs that abstract complex backend logic into clean, usable interfaces — enabling seamless integration with Tether’s platform across various client environments.
• Performance & Reliability at Scale: SDKs must be fast, lightweight, and reliable — even when performing heavy and demanding operations. You’ll design resilient logic (retry policies, offline handling, batching) and contribute to the scalability of platform-facing interfaces and services powering the SDKs.
• Security-First Engineering: You’ll embed best-in-class security practices directly into the SDK architecture, including secure communication, encrypted storage and rigorous input validation. Your work will help ensure safe integration pathways for all developers working with the Tether ecosystem.
• +6 years of experience working with Nodejs/JavaScript in production environments.
• Proven track record in designing and maintaining developer-facing SDKs (npm packages, API clients, or instrumentation libraries)
• Strong understanding of modular architecture, versioning strategies, and semantic API design
• Have actively participated in the development of a complex platform
• Experience with AI domain applications (RAG, Agents, Inference, AI SDKs)
• Ability to quickly learn new technologies
• Good understanding of security practices
  
  

Nice to have

• Familiar with Peer-to-Peer technologies (Kademlia, bittorent, libp2p)
• Comfortable with high-availability concepts
• Rust or C++ skills are a plus
• Familiarity with real-time data delivery (NodeJS/other streaming)

Seniority level

• Seniority level

  Not Applicable

Employment type

• Employment type

  Full-time

Job function

• Job function

  Information Technology

• Industries

  Technology, Information and Internet

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