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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Software Engineer - Fullstack - **Company:** Fanatics Inc - **Location:** Jacksonville, FL, United States (Remote available) - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** Java (Programming Language), JavaScript (Programming Language), A/B Testing, Artificial Intelligence, Software Quality, Code Review, Cursor (Graphical User Interface Elements), Programming Tools, Python (Programming Language), PostgreSQL, Software Tools, Next.js, Responsive Web Design, Systems Integration, Strategies of Testing, TypeScript, Web Applications, Web Standards, Tailwind, GitHub Copilot, ReactJS, Backend, Event Driven Architecture, Information Technology, Production Code, Apache Kafka, Front End Software Development, Web Api - **Published:** September 10, 2026 - **Apply:** https://arc.dev/remote-jobs/j/redirect/pj27jij2xe ## About the Role * Over 6 years experience and/or operating at Senior/Staff level building highly scalable, production systems - whether that's user-facing web applications in modern JavaScript/TypeScript and React, or backend services in a language like Go, Java or Python. If you're frontend-strong, you don't need to arrive fluent in Go - just curious about what's happening beneath the UI * Experience in React architecture, component-driven development, and modern state management patterns, libraries like NextJS, TanStack Query, Tailwind, Zustand - or, on the backend, experience with data modeling and event-driven architecture (e.g. Postgres, Kafka/PubSub) * Deep knowledge of your primary language's features, idioms, and best practices (JavaScript/TypeScript or a backend language), with the ability to influence team standards * Strong understanding of performance and reliability - responsive design, accessibility, and web standards on the front end; scalability, observability, and correctness on the backend * Experience integrating with backend APIs and collaborating with cross-functional platform/infra teams * Experience with CI/CD pipelines, testing strategies, and safe deployment practices for web applications * Team-first mentality, with a willingness to do what it takes to get the job done and a desire to strive for better * Demonstrated experience using AI tools (Claude Code, Codex, Cursor, Copilot, etc.) to ship production code * Can demonstrate specific examples of workflow improvements (e.g., "reduced boilerplate generation time by 40%") * Effectively communicates complex technical concepts clearly to diverse audiences, including engineers and stakeholders * Thrives in a high-growth environment where priorities evolve regularly and decisions are made quickly * Strong ability to collaborate cross-functionally across diverse teams within large enterprise environments, supporting alignment and shared success _You don't need to tick every box - strength in one area and a willingness to learn goes a long way., * Previous experience in early-stage or high-growth startup environments * Contributions to open-source projects or technical community * Experience with real-money transaction systems and regulatory compliance * Background in building developer tools or improving engineering productivity * Experience leading without authority and influencing technical direction across teams * BSc in Computer Science or related field 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 connections 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. ## Description This Senior Software Engineer role is an IC with significant ownership across our full stack: the web application customers use to interact with our product, and the backend systems that power it. Whichever side you're strongest on, you'll have real room to deepen your reach into the other as you join a product at an exciting early stage, helping define the product, technical foundations, and ways of working from scratch. You'll lead by example, establishing best practices for AI-assisted development while building systems that can handle millions of events daily., On the engineering side, we're pioneering the use of AI as a code collaborator. We need engineers who have gone beyond experimentation-who actively use Claude Code, Codex, GitHub Copilot, or similar tools to ship production code faster while maintaining exceptional quality standards., * Lead the design, development, testing, and deployment of scalable, high-quality experiences - whether that's front-end work in React, Next.js, and modern TypeScript, or backend work in Go (modeling data for markets, orders, and transactions) - while making meaningful contributions on the other side of the stack too * Drive the technical evolution of our Markets platform, partnering closely with product and design to deliver engaging, performant, and accessible features * Own features end-to-end: spec writing * implementation * instrumentation * deployment * monitoring * iteration based on metrics * Design and implement experimentation capabilities (feature flags, A/B tests) to validate ideas quickly and safely * Integrate with backend APIs and collaborate with platform teams to build reliable, observable systems * Conduct thorough code reviews, raising the bar on code quality, readability, and maintainability * Leverage AI tools to accelerate development velocity while maintaining high standards for security, correctness, and performance * Establish and document team standards for AI usage (prompt patterns, code review checklists, validation strategies) * Contribute to an early stage product environment, unblocking others and taking initiative where processes are still being defined ## Related Videos - [Watch Tests Go Brrrr! : Getting Started with Cypress in ReactJS](https://www.wearedevelopers.com/videos/282-watch-tests-go-brrrr-getting-started-with-cypress-in-reactjs) - [GraphQL + Apollo + Next.js: A Lovely Trio](https://www.wearedevelopers.com/videos/311-graphql-apollo-next-js-a-lovely-trio) - [Web APIs you might not know about](https://www.wearedevelopers.com/videos/281-web-apis-you-might-not-know-about) - [Emergency Discussion: Can’t Hire the Right Developers? Here’s What Everyone Else Misses](https://www.wearedevelopers.com/videos/1748-emergency-discussion-can-t-hire-the-right-developers-here-s-what-everyone-else-misses) - [From Zero to Hero: NextJS 13 and Tailwind CSS for Beginners](https://www.wearedevelopers.com/videos/766-from-zero-to-hero-nextjs-13-and-tailwind-css-for-beginners) - [WeAreDevelopers LIVE – AI, Freelancing, Keeping Up with Tech and More](https://www.wearedevelopers.com/videos/1786-wearedevelopers-live-ai-freelancing-keeping-up-with-tech-and-more) ## Related Articles - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs) - [How Much FAANG Companies Actually Pay Software Engineers in 2025](https://www.wearedevelopers.com/magazine/230-how-much-faang-companies-actually-pay-software-engineers-in-2025) - [What’s the Difference Between Frontend and Backend Development?](https://www.wearedevelopers.com/magazine/240-what-s-the-difference-between-frontend-and-backend-development) - [Where to Find Entry-Level Software Engineering Jobs](https://www.wearedevelopers.com/magazine/397-where-to-find-entry-level-software-engineering-jobs) - [Why Attend a Developer Event in 2026?](https://www.wearedevelopers.com/magazine/688-why-attend-a-developer-event-in-2026) - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated)