Senior Full Stack Developer

Superduper

Portugal · Full-time · Mid-Senior

About Us

We are an innovative iGaming company offering a comprehensive suite of crypto-focused products, including sportsbook and casino experiences. By combining cutting-edge technology with a deep understanding of the crypto space, we aim to revolutionise the betting and gaming experience for a global audience.

Our mission is to create the most effortless and accessible betting and gaming entertainment experience, delivering innovation and personalisation at every touchpoint.

Our vision is to become a leading player in the betting industry by combining seamless user experiences with groundbreaking personalisation and community-driven engagement.

Whether it’s through competitive sportsbook offerings or immersive casino gameplay, we are dedicated to creating a unique and engaging platform. Join us in shaping the future of crypto iGaming.

Senior Fullstack Developer

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.

Requirements:

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 Qualifications:

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.

Superduper is a leading web3 entertainment company that develops rich IP, as well as games and other media around for each IP. Superduper also develops a web3 publishing and rewards platform called Portal.

Portal's proprietary technology facilitates interoperability of onchain virtual goods and economies, unifying the web3 gaming ecosystem that has been fragmenting through the expanding range of blockchains, wallets, marketplaces, and other parts of the web3 stack.

Key Skills

Ranked by relevance

typescript postgresql serverless aws containerization design systems restful apis javascript cloudflare responsive webpack reactjs graphql docker devops svelte mysql redis html5 oauth cloud sass cicd css git vue gcp isr ui ux

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