Senior Mobile Developer (React Native)

EngineeringFull TimeWorldwide (remote)

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About Horizon Blockchain Games

At Horizon, we’re building a New Dimension where Internet economies are fun, accessible, and for the benefit of all participants.

We have two amazing products to make this real:

Sequence, our Web3 wallet and platform, provides a seamless user and developer experience for Ethereum, NFTs, Web3, DeFi and Dapps, allowing any web application to integrate with blockchain in two minutes.

And Skyweaver, a digital trading card game—powered by Sequence—where players actually own the game items they win and purchase. For the first time, gamers can easily and securely sell and trade their items.

Skyweaver has the chance to become a groundbreaking TCG with its unprecedented player-owned economy, novel gameplay, and an already fervent community during its Private Beta. And, Sequence is poised to drive Web3 adoption on a massive scale by making blockchain easy, fun and powerful for users and developers.

While the challenge is hard, we find it incredibly fun. And we have the ingredients to make it happen: A well-capitalized company with some of the best investors in the world (Reddit co-founder, Coinbase), an amazing team of leaders in the blockchain space, engineers who have built widely popular open source, a former top McKinsey strategy consultant, gaming industry veterans, and founders who have built and sold successful companies. You'll get to work with and learn from them all.

About the Role

We are looking for someone who is passionate and experienced in building and shipping production-quality mobile applications that are seamless and easy for users all around the globe.

This individual will own the Sequence Web3 Wallet mobile app for both iOS and Android by architecting and building significant new features in the mobile app. If you don't have blockchain experience, there's no need to fear! Our Sequence.js stack--which is open source--has been hand-crafted by our expert team to make it easy for you to build a beautiful front-end experience. We have a wonderful team and strong collaborative culture, so we'll ramp you up to build the best wallet in the world.

You will get the opportunity to not only create intuitive, robust and reusable user interfaces using modern frameworks, but you also get to work alongside world class experts in blockchain and open-source technology while doing it.

We admire passionate individuals that take pride in writing clean code that is well documented and well tested driven by the philosophy to maintain efficiency throughout the development cycle.

You are self-driven, open-minded, committed to learning, and are excited by working in a dynamic team environment where your efforts will make a big impact.


  • Collaborate with the design, product and engineering teams to ensure we ship quickly and iterate on high-quality features
  • Design robust and sound architectural foundations, so that future engineers can build on your work with ease and speed
  • Build secure and scalable systems for the Sequence mobile app
  • Write clean, well-documented, and well tested code using best practices for React Native development
  • Help make Sequence Wallet the best possible application it can be


  • 5+ years professional experience in quality software development
  • 4+ years experience with React Native on the Android and iOS platforms
  • Emphasis on creating secure mobile apps that perform at scale
  • A passion for shipping applications that users love
  • Experienced with continuous software integration and deployment
  • Experienced developing and deploying frontend, web APIs, databases, and backend systems
  • Ability to take extreme ownership for your work
  • Ability to work through difficult React Native issues and contribute to libraries as needed
  • Rigorous eye for detail
  • Collaborative and open-minded
  • A passion for software development and a commitment to continued learning and growth
  • Strong communication skills in English, both verbal and written

Nice to Have

  • Comfortable working with and guiding intermediate and junior engineers
  • Experience writing native iOS and/or Android apps, for the times when going under the hood is necessary with React Native
  • Knowledge and passion for Web3, Ethereum and blockchain
  • Contributed to open source projects

Why Horizon?

  • Chance to deliver massive impact at a small and quickly growing company
  • Accelerate your career by joining at the early stages
  • Be part of defining Web3, the next generation of the Internet, and creating symbiotic economies where both users and creators share in the value generated by networks
  • Work with an outstanding team made of wonderful people who have built and sold successful companies, launched amazing products, and have rich experience in infrastructure, architecture, blockchain, games, finance, investing, strategy, consulting, design, marketing, community, and more.
  • Work life balance unlike the “crunch” culture you find at larger studios
  • New PC, and generous allowance for work-from-home setup
  • Competitive salary and equity package
  • Health, dental, and vision benefits
  • We’re conscious about mental health and have modern vacation policies
  • We invest in everyone’s personal development and subsidize courses, books, and conferences, so you never stop learning
  • Work on hard, big, meaningful problems that can shift markets
  • Learn more about our values and the traits we embody at

We are committed to diversity

We are committed to diversity and encourage applicants from all backgrounds, genders and faiths. While we're building incredible products, we also want to add to our wonderful team and company. The best way to do that is to attract talented folks from all areas and to have their experiences inform their work.