Senior Software Engineer (Web)

LiftedanUpworkCompany

Sofia, Sofia City Province, Bulgaria Remote contract

Posted: April 15, 2026

Job Description

Summary

An enterprise client is looking for a Senior Software Engineer (Web) to build and scale modern frontend applications using React and TypeScript. This role is hands-on and spans the full development lifecycle—from design collaboration through production deployment—while contributing to architecture, mentoring engineers, and driving best practices across the frontend ecosystem.

The role will be based out of Bulgaria. The ideal candidate would be located in Sofia and be willing to occasionally visit the office.

Responsibilities

• Build and ship React features end-to-end, including scoping, design review, implementation, testing, and deployment
• Collaborate daily with product, design, and backend teams in an agile environment (standups, sprint planning, retrospectives)
• Review pull requests with focus on performance, accessibility, maintainability, and correctness
• Write and maintain unit, integration, and end-to-end tests (Jest, Playwright, Cypress)
• Contribute to frontend architecture decisions including component design, state management, and API contracts
• Use AI coding tools (e.g., GitHub Copilot, Cursor) and LLM APIs to accelerate development and prototyping
• Debug production issues, participate in incident response, and drive root cause analysis
• Support containerized deployments using Docker and Kubernetes
• Mentor junior and mid-level engineers through code reviews and pair programming
• Improve developer experience, tooling, and CI/CD pipelines
• Stay current with the React ecosystem and recommend improvements or migrations

Required Skills

• 5+ years of frontend development experience
• Expert-level React (hooks, context, performance optimization, testing)
• Strong TypeScript proficiency
• Experience with design systems (Mantine, MUI, Chakra, or similar)
• Node.js experience for tooling, APIs, or BFF patterns
• Python experience (API integration, scripting, or data processing)
• Testing experience across unit, integration, and end-to-end levels
• Proficiency with Git
• Experience with Docker (build, run, debug containers)
• Strong communication skills and ability to work cross-functionally
• Bachelor’s or Master’s degree in Computer Science or related field
• Ability to manage priorities in a fast-paced environment

Preferred Skills

• Experience with AI coding assistants (GitHub Copilot, Cursor)
• PHP API development (legacy system exposure)
• Kubernetes fundamentals (pods, services, deployments, configmaps)
• Azure KeyVault or similar secrets management tools
• CI/CD pipelines (Jenkins, GitHub Actions, Azure DevOps)
• OAuth2 / OpenID Connect authentication flows
• Airline or travel industry experience

AI Fluency & Growth Mindset

• Apply AI concepts ethically to improve productivity and decision-making
• Write effective prompts for high-quality AI outputs
• Explore agentic AI systems to automate workflows
• Leverage AI tools to enhance efficiency and innovation
• Stay adaptable and continuously experiment with AI-driven solutions

• Remote candidates based in Bulgaria will also be considered.
• The role is expected to be full time (40 hours a week) and last for about 9 months.

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