Senior Full Stack Engineer (React, Node & Nest) - Tieto Tech Consulting (m/f/d)

Employment: Full-time Experience level: Mid-Senior Level Job Description Tieto Tech Consulting (MentorMate from 2001 to 2026) provides design-led, data-centric, and AI-powered digital engineering & consulting services to enterprises worldwide. With a strong heritage of Nordic quality, local presence, and global-scale operations, we are backed by 8,500+ IT professionals. Our clients trust us for advanced data and analytics skills, top industry-specific expertise, specialized software R&D, and the capabilities of a multinational team. We are part of Tieto, a leading technology company with an annual revenue of approximately EUR 2bn.    Tieto Tech Consulting’s team in Bulgaria consists of 500+ professionals specializing in the development of tailored digital solutions in diverse industries. We are looking to hire a  Senior Full Stack Engineer , who will play a key role in developing scalable web applications and backend-for-frontend services using  React, TypeScript, Node.js, and NestJS . Working closely with cross-functional teams, you will help deliver reliable, user-focused healthcare solutions while contributing across the full software development lifecycle. The role combines hands-on engineering, collaboration, and continuous improvement, with strong emphasis on code quality, automated testing, maintainability, and Agile delivery practices.    Key Responsibilities  Develop and enhance frontend functionality for modern healthcare-focused web applications  Build and maintain backend-for-frontend services using Node.js and NestJS  Collaborate closely with Product Owners, Business Analysts, designers, QA engineers, and developers to deliver high-quality features  Participate in feature refinement, technical discussions, sprint planning, and Agile ceremonies  Contribute to building scalable, maintainable, and well-tested solutions following engineering best practices  Write and maintain unit and automated tests to ensure product quality and reliability  Investigate and resolve application issues in collaboration with support and QA teams  Support continuous improvement initiatives across development processes, tooling, and team collaboration    Required Experience & Qualifications  5+ years of professional software development experience  Strong experience building modern web applications using React and TypeScript  Solid backend development experience with Node.js and NestJS  Experience working in large-scale frontend projects and distributed development teams  Strong understanding of modern frontend architecture and component-based development  Hands-on experience with automated testing frameworks such as Vitest, Jest, Cypress, or Playwright  Experience applying Test-Driven Development (TDD) and writing maintainable, well-tested code  Proficiency with Git and collaborative development workflows  Experience with styling solutions such as Tailwind CSS, Styled Components, or Emotion  Understanding of software engineering best practices, code quality, and maintainability  Strong communication skills and fluent English    A significant advantage would be     Experience with UI component libraries such as Material UI  Familiarity with messaging and event-streaming platforms such as Kafka  Understanding of Web Accessibility standards and best practices  Exposure to CI/CD workflows and tools such as GitHub Actions  Experience collaborating with designers using tools like Figma  Familiarity with design systems and reusable component libraries  Experience working in healthcare, regulated, or enterprise environments is considered an advantage  Familiarity with Agentic coding practices and AI-assisted development tools  Additional Information At Tieto, we believe in the power of diversity, equity, and inclusion. We encourage applicants of all backgrounds, genders (m/f/d), and walks of life to join our team, as we believe that this fosters an inspiring workplace and fuels innovation. Our commitment to openness, trust, and diversity is at the heart of our mission to create digital futures that benefit businesses, societies, and humanity. Diversity, equity and inclusion | Sustainability | Tieto