Senior Fullstack Node.js+React Engineer

Job Summary

As a Senior Full-stack Engineer, you will architect and deliver end-to-end solutions for our cutting-edge Skin Gambling and Casino Platform, seamlessly integrating robust back-end services with responsive front-end experiences. Using Node.js and React, you’ll transform design visions into a high-performance, secure platform that operates flawlessly across web and mobile devices, serving players globally.

Required Qualifications

• 6+ years of commercial software development experience, with a portfolio demonstrating complex web applications.
• 3+ years of experience as a Fullstack JavaScript/TypeScript Developer
• Solid expertise in Node.js, Nest.js, TypeORM, WebSockets, PostgreSQL, and Redis.
• Deep knowledge of SQL and NoSQL database architecture, optimization, and management.
• Proven hands-on experience with React.js and Next.js for building complex interactive web interfaces for desktop and mobile devices.
• Proficiency in TypeScript, MobX/Redux for state management, and modern CSS frameworks (SCSS or Tailwind CSS).
• Hands-on experience with Vite, monorepo tooling (e.g., Turborepo), and WebSocket integration.
• Experience with SSR and SPA architectures, understanding of reactive programming, and state management.
• Experience writing and executing tests, including unit, integration, and failure tests.
• Knowledge of Docker, Kubernetes, and the concepts and benefits of CI/CD processes.
• Knowledge of SOLID, GRASP, CQRS principles, GoF design patterns, and DDD concepts. 
• Knowledge of Event Sourcing, including events, aggregates, projections, and event streams.
• Good knowledge of traditional monolithic architectures, microservices architecture, and hexagonal architecture's emphasis on separation of concerns.
• Fluency in Ukrainian or Russian and proficiency in English for technical collaboration in a remote/global team setting.
• Ability to work within the CET/EET time zone.

Your Advantage

• Experience with Skin/NFT Gambling or Online Casinos.
• Experience with high-load systems and payment service providers integration.
• Experience with blockchain technology in iGaming or Fintech.
• Previous experience working in a start-up environment with rapid iteration cycles.
   

Key Responsibilities

• Architect & Develop Full-Stack Solutions: Design, build, test, deploy, and maintain secure, scalable features for our Skin Gambling/Casino Platform using Node.js (Nest.js) and React.js (Next.js) across web and mobile.
• Build & Optimize Backend Services: Develop high-performance backend logic, APIs (including WebSockets), data access layers, and integrations using Node.js, PostgreSQL, Redis, and TypeORM.
• Engineer Frontend Experiences: Create responsive, complex UIs with React.js, Next.js, TypeScript, MobX/Redux, and modern CSS (SCSS/Tailwind), ensuring optimal user experience.
• Apply Architectural Principles: Implement SOLID, GRASP, DDD, CQRS, Event Sourcing, and design patterns (GoF), choosing appropriate architectures (mono/microservices, hexagonal).
• Ensure Performance & Scalability: Identify and resolve bottlenecks, optimize databases (PostgreSQL), implement caching (Redis), and design for global traffic demands.
• Uphold Quality: Write and execute comprehensive tests (unit, integration, E2E); conduct code reviews to ensure stability and prevent regressions.
• Partner Cross-Functionally: Collaborate with Product, Design, QA, and stakeholders to translate requirements into technical solutions on time.
• Solve Problems & Innovate: Troubleshoot complex issues; research and propose new technologies to enhance platform capabilities and efficiency.
• Document Systems: Create and maintain clear technical documentation for architectures, APIs, and processes.