Senior Frontend Engineer; React

About Block Labs

Block Labs is a leading force in the Web3 space, incubating, investing in, and accelerating top-tier fintech, crypto, and iGaming projects. With a mission to shape the future of decentralized technology, we partner with visionary startups to raise funding, refine product‑market fit, and grow their audiences.

As a Senior Frontend Engineer, you will help build high-performance, modular and visually engaging interfaces across a range of cutting‑edge platforms. You will work within a cross‑functional team of engineers, product managers and designers to deliver seamless user experiences across web application. This is a hands‑on role with significant influence over architectural choices, component design and frontend tooling.

• Design and implement user‑facing features with strong attention to performance, responsiveness and UX
• Build, maintain and refactor modular React‑based interfaces for scalability and reusability
• Collaborate with product and backend teams to define API contracts and feature behavior
• Advocate for clean, testable and maintainable code through peer reviews and documentation
• Optimize applications for speed, cross‑browser compatibility and accessibility
• Work within a modern CI/CD pipeline to ship features efficiently and safely
• Contribute to shared design systems or internal tooling as needed

• You have over 5 years of experience in frontend engineering with a focus on creating high‑quality, scalable web applications
• Strong expertise in React (or comparable frameworks) and modern JavaScript/Type Script
• Previous experience with micro frontend architectures is a plus
• Experience with build tools (like Bun, Vite, Webpack) and testing frameworks (such as Cypress or Selenium) is essential
• You have experience in Dev Ops practices and containerization technologies in cloud environments
• You are passionate about software quality and creating exceptional user experiences
• You have a strong command of both verbal and written English
• Background in fintech, DeFi, or iGaming is a bonus

Mature, mission‑driven, and low‑ego. We value clarity over noise, outcomes over theatrics, and pace without chaos. If you’re one of the smartest minds in your craft and want to build with other experts, you’ll feel at home here.

Mid‑Senior level

Full‑time

Engineering and Information Technology

Technology, Information and Internet