Senior Blockchain Engineer - Full Stack

Fanatics, Inc.; Remote; GBP 125,000 - 150,000; Full time

Job summary

A major sports technology company in the United Kingdom is looking for a Full Stack Software Engineer III to contribute to developing predictive technology solutions. The ideal candidate should have 3 to 5 years of experience in software development, solid backend expertise in Go or Java, and strong skills in frontend technologies like ReactJS and Node.js. This role supports remote work with potential home office stipends, emphasizing teamwork and communication. Join us to help shape the future of sports betting.

Benefits

Home office setup stipend

Remote working flexibility

Qualifications

• 3 to 5 years of professional software development experience.
• Strong proficiency in backend languages such as Go or Java.
• Solid experience with frontend technologies including ReactJS, Node.js, Redux, JavaScript, HTML, and CSS.

Responsibilities

• Design, develop, test, deploy, and maintain scalable software applications.
• Build and optimize RESTful APIs and backend services.
• Collaborate closely with product managers, designers, QA, and other engineering teams.

Skills

Proficiency in Go

Proficiency in Java

Frontend technologies (ReactJS, Node.js, Redux)

HTML and CSS

Debugging and troubleshooting

Collaboration

Agile development

Education

Bachelor's degree in Computer Science or related field

Tools

PostgreSQL

MySQL

MongoDB

AWS

Jest

React Testing Library

Job description

Job Description

This job is brought to you by Jobs/Redefined, the UK's leading over-50s age inclusive jobs board.

About Fanatics Markets

Fanatics Markets is the real-money prediction and trading app where you can invest in moments you care about. Built on a secure platform, we let users predict real-world outcomes and trade on events they actually follow - from sports and entertainment to political elections and beyond. Our mission is to redefine how fans engage with the moments and markets that matter most. We're looking for the right people to help us build the future of prediction markets.

Overview

We are seeking a highly skilled and experienced full stack Software Engineer III to join our growing engineering team. As a Software Engineer III, you will contribute significantly to the design, development, and maintenance of our core applications. You will work independently and collaboratively on complex projects, leveraging your expertise in Go, Java, JavaScript, HTML, ReactJS, Node, Redux, and more to build robust and scalable systems. This role requires a strong understanding of software engineering principles, experience with various technologies, and a passion for building high‑quality, maintainable software.

Responsibilities

• Design, develop, test, deploy, and maintain scalable and reliable full stack software applications using Go, Java, ReactJS, Node.js, Redux, HTML, and CSS.
• Build and optimize RESTful APIs and backend services while developing responsive and accessible user interfaces aligned with the design system.
• Work with relational databases such as PostgreSQL or MySQL and NoSQL databases like MongoDB; write efficient queries and optimize database performance.
• Debug and troubleshoot complex production issues with the help of monitoring and logging tools.
• Participate actively in system design discussions, proposing balanced and scalable solutions that consider maintainability and performance.
• Write and maintain automated tests for both frontend and backend components using tools such as Jest and React Testing Library.
• Contribute to CI/CD pipeline improvements and deployment automation.
• Collaborate closely with product managers, designers, QA, and other engineering teams to deliver high-impact solutions.
• Document technical decisions, design patterns, and system architectures clearly for team and organizational knowledge sharing.
• Actively participate in technical discussions and code reviews, providing constructive feedback.
• Continuously improve developer workflows through tooling, linting, and automation.
• Support onboarding and mentoring of junior engineers.
• Stay up-to-date with emerging technologies and best practices, sharing insights and recommendations with the team.

Qualifications

• Bachelor's degree in Computer Science or related field, or equivalent experience.
• 3 to 5 years of professional software development experience.
• Strong proficiency in backend languages such as Go or Java.
• Solid experience with frontend technologies including ReactJS, Node.js, Redux, JavaScript, HTML, and CSS.
• Experience designing and developing RESTful APIs.
• Hands‑on experience with relational and/or NoSQL databases.
• Familiarity with cloud platforms, preferably AWS, is a good‑to‑have.
• Experience with CI/CD pipelines is a plus.
• Strong debugging and troubleshooting skills.
• Experience writing automated tests for both frontend and backend.
• Excellent communication skills, with proven ability to collaborate effectively across teams and with product managers.
• Experience working in Agile development environments.
• Experience with design systems, Storybook, or similar tools is a plus.

Remote employee may also be eligible for a home office setup stipend.

Depending on the role, your interview and onboarding experience may include in-person components, such as onsite interviews or Launching into Better: LIVE-a multi‑day cultural immersion in New York City for full‑time, non‑seasonal hires. These sessions are designed to build connection and bring our culture to life, though specific travel and participation requirements will be confirmed based on your role and location. Your recruiter will provide clear guidance at each stage of the process.

Ready to build the future of sports betting? If you possess some of these skills but not all of them, we still encourage you to apply! Please note that visa sponsorship is not available for this position. We are open to fully remote candidates based in the United Kingdom. Remote employee may also be eligible for a home office setup stipend.