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Superduper · 1 month ago

Senior Fullstack Developer

United States

Full-time

Remote

Senior Level

5+ years exp

Superduper is an innovative iGaming company focused on revolutionizing the betting and gaming experience through cutting-edge technology and crypto products. The Senior Fullstack Developer will architect and develop services, manage API contracts, and collaborate with teams to deliver seamless user experiences while ensuring backend reliability and performance optimization.

BlockchainFashionGamingMedia and EntertainmentWeb3

Responsibilities

Architect and develop services using Node.js and TypeScript, powering seamless, high-performance frontend applications

Implement and manage routes, serverless functions, and custom endpoints to serve dynamic content and support hybrid rendering strategies (SSR, ISR, SSG)

Build and maintain GraphQL and RESTful APIs that serve as the backbone for frontend experiences, ensuring fast response times, clear contracts, and data efficiency

Collaborate with frontend developers to define API contracts, data transformation layers, and client-side caching strategies

Handle authentication and authorization flows, including JWT, OAuth, SSO, and session management tailored to frontend security needs

Integrate deeply with third-party services and APIs (e.g., payment processors, analytics, CMSs), abstracting complexity and delivering a clean interface to the UI

Work with databases (e.g., PostgreSQL, MongoDB) to support dynamic content, user data, and transactional operations

Develop and maintain middleware logic, including rate limiting, input validation, logging, and error handling to ensure backend reliability and observability

Optimise frontend performance from the backend side via caching strategies (Redis, edge caching), content preloading, and smart data fetching approaches

Collaborate with DevOps/infra teams to implement secure and scalable deployment pipelines using platforms like Vercel, AWS, or Cloudflare

Establish strong testing practices for API endpoints and business logic using tools like Jest, Supertest, or Playwright

Proactively identify and resolve performance bottlenecks at the data-fetching, API, or rendering layer

Contribute to platform architecture discussions with a focus on developer experience, modularity, and code reuse across frontend and backend layers

Work closely with product teams and designers to break down complex features into efficient technical solutions that align with both UX and architectural goals

Qualification

TypeScriptNode.jsReact.jsAPI designPostgreSQLMongoDBCI/CD workflowsHTML5CSS3JavaScript ES6+Communication skillsCollaboration skills

Required

Bachelor's degree in Computer Science, Engineering, or equivalent experience in a related technical field

5+ years of professional development experience, with 3+ years working across both frontend and backend

Expertise in TypeScript, including advanced typing strategies and safe code patterns

Deep knowledge of React.js, Next.js, and Node.js, including serverless functions, API routes, and hybrid rendering

Strong skills in HTML5, CSS3 (e.g., Tailwind CSS, styled-components, or Sass), and modern JavaScript (ES6+)

Proven experience in backend architecture, including API design, authentication flows, session/token management, and data modeling

Experience with databases like PostgreSQL, MongoDB, or MySQL, and ORMs such as Prisma or TypeORM

Solid understanding of CI/CD workflows, Git, and build tools such as Webpack, Turbopack, or Vite

Mastery of responsive and adaptive design principles with strong attention to cross-browser and cross-device compatibility

Strong communication and collaboration skills, working efficiently with product managers, designers, and engineers across disciplines

Passion for clean, maintainable, and well-documented code with a test-driven mindset

Preferred

Experience leading fullstack projects or engineering squads in Agile/Scrum environments

Familiarity with modern frameworks beyond React/Next.js (e.g., Remix, Svelte, or Vue). Knowledge of performance optimization at both the frontend (lazy loading, code splitting, image optimization) and backend (caching, rate limiting, DB indexing)

Exposure to DevOps principles, including monitoring, observability, containerization (e.g., Docker), and cloud platforms (e.g., Vercel, AWS, GCP)

Experience contributing to or maintaining design systems and internal component libraries

Background in high-performance domains such as gaming, fintech, e-commerce, or real-time applications