Backend Developer – Python/Go; Kotlin/SpringBoot (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

In this role, you will contribute to the development of modern backend systems that connect software platforms with device clusters and gateways. Depending on your technical background, your focus will be either on backend services built with Python and Go or on backend and gateway services implemented with Kotlin and Spring Boot. You are not expected to cover all technologies — we value strong expertise in one of these backend stacks.

• Design, develop, and maintain backend services for device- and cluster-based platforms.
• Take ownership of backend components based on your expertise as a Python/Go Backend Developer or a Kotlin/Spring Boot Backend Developer.
• Develop services for cluster creation, device configuration, software updates, and metrics management or gateway services that act as a connection layer between SDKs and devices.
• Implement and maintain service communication using gRPC and REST.
• Coordinate backend workflows such as bootstrapping, execution, and service orchestration.
• Work with Linux-based environments and system-level integrations where required.
• Contribute to architectural decisions, technical standards, and best practices.

Required qualifications to be successful in this role:

• Minimum 3+ years of experience in backend development
• Strong expertise as either:
  • a Python and/or Go Backend Developer with solid Linux knowledge or
  • a Kotlin Backend Developer with advanced Spring Boot experience
• Experience building scalable backend or gateway architectures
• Practical experience with gRPC; REST API experience is a plus
• For Python/Go-focused profiles:
  • Experience with Linux-based systems; knowledge of systemd, dpkg, or avahi is a plus
  • Familiarity with automation or configuration tools such as Ansible
• For Kotlin/Spring Boot-focused profiles:
  • Advanced Kotlin skills and deep understanding of Spring Boot–based services
• Frontend exposure (e.g. TypeScript/React) is a plus, but not required
• Fluent English communication skills

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.