Technical Lead ReactJS

Tryzens Limited is a fast growing IT solutions consultancy based in the City of London with offices in Bulgaria, India and Australia. Our areas of expertise include delivery of eCommerce solutions, multi-channel retail solutions and project management amongst others. We provide best of breed solutions and services to several blue chip clients primarily within retail, financial services and other industries. We have built our delivery focused reputation upon technical innovation, in-depth business knowledge, and creative vision, all of which supports our objective of helping clients to gain true value from eCommerce. We love what we do and our clients love our work.

Due to expanding our team in Sofia we are looking for a Technical lead ReactJS. Please note that this is an on-site role based in Bulgaria and is not a remote position.

Requirements

• 6–8 years of overall IT experience
• At least 4 years of web development experience
• At least 3 years of production React experience, including modern patterns (hooks, Server Components, Suspense)
• Strong experience with at least one modern React meta-framework (Next.js, React Router/Remix, or equivalent)
• Hands-on experience with Vite as a build tool and dev environment
• Proficiency with modern state management (Zustand, Jotai, TanStack Query, or React Context patterns)
• Strong experience with TypeScript in production codebases
• Proficiency with a modern CSS/UI approach (Tailwind CSS, CSS-in-JS, or component libraries like shadcn/ui, Radix, MUI)
• At least 2 years of experience leading or managing engineering teams
• Strong JavaScript fundamentals, including the language object model, async patterns, and modern ES features
• Deep understanding of React core principles, rendering behavior, and performance optimization
• Solid grasp of web fundamentals: accessibility, performance, usability, and information architecture
• Experience with Git and modern CI/CD workflows
• Ability to lead technical and business discussions with clients and internal teams

Preferences will be given to candidates with:

• Experience with React Server Components and streaming/SSR patterns
• Experience with testing (Vitest, React Testing Library, Playwright/Cypress)
• Familiarity with data fetching/caching libraries (TanStack Query, SWR)
• Experience consuming and designing REST and/or GraphQL APIs
• Understanding of TDD and component-driven development
• Experience with edge/serverless deployment (Cloudflare Workers, Vercel, etc.)
• Monorepo experience (Turborepo, Nx, pnpm workspaces)

Responsibilities:

• Leading technical and business discussion with clients and internal team
• Work closely with our customers to understand their business requirements and propose technical solutions
• Champion good engineering and management practices in the team, and continual improvement of related processes
• Developing new user-facing features using React.js
• Building reusable components and front-end libraries for the future use
• Translating designs and wireframes into high-quality code
• Create and oversee the development of testable/maintainable/readable code
• Optimizing components for maximum performance across a vast array of web-capable devices and browsers

Benefits

• extremely competitive remuneration package
• technical trainings and certifications
• flexible working hours
• food and gift vouchers
• additional health insurance
• great work-life balance and 25 days annual vacation
• 1 day birthday leave
• regular team events
• a positive and fun environment