Senior Fullstack Developer (React & Java) (m/f/d)

Position Description

We’re establishing a brand-new technology and innovation hub in Sofia – and you can be part of it from day one. Here, you won’t just be shaping our services for German clients; you’ll also help us build a strong presence in the Bulgarian market. You’ll collaborate closely with our teams in Germany, bring in your ideas, and influence the tools, processes, and culture of our new Sofia location from the ground up.

In short: We’re blending the energy of a fresh start with the reliability of a global player. If you’re excited about building something new both locally and internationally, this is the place to make your mark. Apply now and be part of our success story in Sofia! #BePartofourStory Your future duties and responsibilities

We are looking for a Senior Fullstack Developer with a strong focus on frontend development to join our team and contribute to a complex enterprise application. In this role, you will primarily work on the frontend, building and enhancing scalable, data-driven user interfaces, while also supporting backend development when needed. We expect someone who is comfortable working within an established architecture, can quickly understand existing patterns, and contribute to their consistent evolution.

You will play a key role in delivering high-quality, maintainable solutions end-to-end, combining strong frontend expertise with solid fullstack capabilities.

• Develop and maintain scalable, high-quality web applications as a Fullstack Developer, with a primary focus on frontend development
• Design, build, and enhance complex, data-driven user interfaces using modern frontend technologies
• Work within an existing enterprise application, extending and improving established architectural patterns and reusable components
• Collaborate closely with cross-functional teams to deliver end-to-end features, from UI to backend integration
• Implement and manage state using structured approaches (e.g. Redux and async flows)
• Integrate REST APIs and ensure seamless communication between frontend and backend layers
• Contribute to backend development tasks when needed, using Java-based technologies
• Ensure code quality, consistency, and maintainability through best practices, testing, and code reviews

Required Qualifications To Be Successful In This Role

• Proven experience as a Fullstack Developer with a strong focus on frontend development
• Solid expertise in React and modern frontend ecosystems in medium to large-scale applications
• Strong experience with Redux and async state management (e.g. thunks)
• Hands-on experience building complex business applications (forms, CRUD operations, data grids, dashboards)
• Experience integrating REST APIs into frontend applications
• Working knowledge of backend technologies such as Java and Spring Boot
• Understanding of authentication, authorization, and internationalization (i18n) concepts

What We Offer:

• Team Culture: You’ll find colleagues here who make collaboration enjoyable. We interact openly, use first names across all levels, and don’t think in hierarchies or silos.
• Contract & Working Time: Permanent, full-time contract with a standard 8-hour workday.
• Flexible Work Setup: Enjoy the best of both worlds with our hybrid work model – combining office presence in Sofia with remote work from home.
• Working Hours: Flexible working hours tailored to project needs and client requirements.
• Leave Policy: 25 days of paid vacation.
• Volunteer Opportunities: Make a positive impact with 8 hours of paid leave for voluntary work.
• Career Development: Benefit from clear career progression paths and opportunities to grow within the company.
• Continuous Learning: Access our internal learning platform, CGI Academia, to shape your skills based on your interests. Learn up to 9 languages via goFLUENT.
• Referral Rewards: Extend your network – refer friends and earn bonuses through our rewarded referral program.
• Health & Wellbeing: Access our Health and Wellbeing Portal for resources that support your physical and mental health.
• Workplace Equipment: Receive a budget for noise-cancelling headphones, ergonomic office equipment, and optical glasses for screen work.
• Office Environment: Work in a state-of-the-art co-working space in Sofia, with complimentary coffee, tea, and water to keep you refreshed throughout the day.

Together, as owners, let’s turn meaningful insights into action. Life at CGI is rooted in ownership, teamwork, respect and belonging. Here, you’ll reach your full potential because… You are invited to be an owner from day 1 as we work together to bring our Dream to life. That’s why we call ourselves CGI Partners rather than employees. We benefit from our collective success and actively shape our company’s strategy and direction.

Your work creates value. You’ll develop innovative solutions and build relationships with teammates and clients while accessing global capabilities to scale your ideas, embrace new opportunities, and benefit from expansive industry and technology expertise.

You’ll shape your career by joining a company built to grow and last. You’ll be supported by leaders who care about your health and well-being and provide you with opportunities to deepen your skills and broaden your horizons.

Come join our team—one of the largest IT and business consulting services firms in the world.