Senior React, Node.js Fullstack At BetSymphony, we are embarking on an ambitious project to revolutionize the online gambling industry. Our vision is to develop a cutting-edge gambling platform that will serve as the backbone for multiple different brands, each with its unique identity and target audience. This platform will leverage the latest technologies to ensure a seamless, secure, and engaging experience for users across the globe. As a Fullstack Developer on our team, you will own end-to-end delivery of the BetSymphony Backoffice and frontend applications — a mission-critical internal tool used by operators to manage players, trading, promotions, casino, payments, and reporting in a regulated environment where correctness, performance, and reliability are non-negotiable. We are a team that embraces AI-assisted development as a standard part of the engineering workflow. We expect our engineers to actively use AI tools to accelerate delivery, improve code quality, and reduce time spent on repetitive work — not as an experiment, but as an everyday practice. Mandatory: 5+ years of total software development experience 3+ years of production experience with React, including complex state management (Redux / Redux Toolkit) 2+ years of Node.js experience, with hands-on use of Express.js in a production BFF or API layer Strong proficiency in TypeScript across both frontend and backend Experience with unit and integration testing (Vitest, Jest, or similar) Experience working in a microservices architecture, including understanding of BFF layer integration Familiarity with Docker and basic Kubernetes workflows Proven experience using AI-assisted development tools (e.g., Claude, Cursor, GitHub Copilot, ChatGPT) in daily work (code generation, refactoring, debugging, testing, documentation) — this is a standard expectation, not optional Strong English communication skills (B2+) Self-organized, proactive, and comfortable working in a distributed team Desirable: Experience with JIRA, and Confluence. Experience with ElasticSearch Experience in gambling or online gaming. Experience with TDD development processes. Strong interest in applying AI-powered tools (e.g. Claude, ChatGPT, Copilot, Cursor or similar) to speed up day-to-day development tasks. Proven ability or strong motivation to use AI to reduce development time, improve code quality, and automate repetitive engineering work. Job ResponsibilitiesNew features development within the existing product. Resolving technical problems as they arise. Bug fixing of developed features.Actively leverage AI-assisted tools to improve efficiency across coding, testing, debugging, and other SDLC activitiesWriting Unit tests and integration tests. Communicating with team members and the Product team. Scrum ceremonies participation. Mentoring middle and junior colleagues might be required. At BetSymphony, we are embarking on an ambitious project to revolutionize the online gambling industry. Our vision is to develop a cutting-edge gambling platform that will serve as the backbone for multiple different brands, each with its unique identity and target audience. This platform will leverage the latest technologies to ensure a seamless, secure, and engaging experience for users across the globe. As a Fullstack Developer on our team, you will own end-to-end delivery of the BetSymphony Backoffice and frontend applications — a mission-critical internal tool used by operators to manage players, trading, promotions, casino, payments, and reporting in a regulated environment where correctness, performance, and reliability are non-negotiable. We are a team that embraces AI-assisted development as a standard part of the engineering workflow. We expect our engineers to actively use AI tools to accelerate delivery, improve code quality, and reduce time spent on repetitive work — not as an experiment, but as an everyday practice. Mandatory: 5+ years of total software development experience 3+ years of production experience with React, including complex state management (Redux / Redux Toolkit) 2+ years of Node.js experience, with hands-on use of Express.js in a production BFF or API layer Strong proficiency in TypeScript across both frontend and backend Experience with unit and integration testing (Vitest, Jest, or similar) Experience working in a microservices architecture, including understanding of BFF layer integration Familiarity with Docker and basic Kubernetes workflows Proven experience using AI-assisted development tools (e.g., Claude, Cursor, GitHub Copilot, ChatGPT) in daily work (code generation, refactoring, debugging, testing, documentation) — this is a standard expectation, not optional Strong English communication skills (B2+) Self-organized, proactive, and comfortable working in a distributed team Desirable: Experience with JIRA, and Confluence. Experience with ElasticSearch Experience in gambling or online gaming. Experience with TDD development processes. Strong interest in applying AI-powered tools (e.g. Claude, ChatGPT, Copilot, Cursor or similar) to speed up day-to-day development tasks. Proven ability or strong motivation to use AI to reduce development time, improve code quality, and automate repetitive engineering work. Job ResponsibilitiesNew features development within the existing product. Resolving technical problems as they arise. Bug fixing of developed features.Actively leverage AI-assisted tools to improve efficiency across coding, testing, debugging, and other SDLC activitiesWriting Unit tests and integration tests. Communicating with team members and the Product team. Scrum ceremonies participation. Mentoring middle and junior colleagues might be required.