Senior Backend Developer

We're Concentrix. The intelligent transformation partner. Solution-focused. Tech-powered. Intelligence-fueled.

The global technology and services leader that powers the world’s best brands, today and into the future. We’re solution-focused, tech-powered, intelligence-fueled. With unique data and insights, deep industry expertise, and advanced technology solutions, we’re the intelligent transformation partner that powers a world that works, helping companies become refreshingly simple to work, interact, and transact with. We shape new game-changing careers in over 70 countries, attracting the best talent.

In our Information Technology and Global Security team, you will deliver the latest technology infrastructure, transformative software solutions and industry-leading global security for our staff and clients. You will work with the best in the world to design, implement and strategize IT, security, application development, innovation, and solutions in today’s hyperconnected world. You will be part of the technology team that is core to our vision of develop, build and run the future of Integrated Services. Our game-changers around the world have devoted their careers to ensuring every relationship is exceptional. And we’re proud to be recognized with awards such as "World's Best Workplaces," “Best Companies for Career Growth,” and “Best Company Culture,” year after year. We embrace our game-changers with open arms, people from diverse backgrounds, who are curious and willing to learn. Your natural talent to help others and go beyond WOW for our customers will fit right in with what we do and who we are. Join us and be part of this journey towards greater opportunities and brighter futures.

Join us in shaping the future of intelligent customer service solutions. We are looking for an experienced Senior Backend Developer to lead the design and development of scalable AI-powered Retrieval-Augmented Generation (RAG) systems behind kBot – our no-code assistant that empowers support agents with fast, accurate information across languages and systems.

This role focuses on building robust backend services that integrate generative AI with enterprise data sources, using modern frameworks, cloud-native patterns, and LLM technologies. You’ll collaborate with cross-functional teams in an Agile/Kanban setup, contributing to a globally scalable knowledge solution that enhances the productivity of our customer service professionals.

Key Responsibilities:

• Design, develop, and maintain backend services and APIs for AI-powered applications.
• Integrate LLM frameworks, vector databases, and data processing pipelines to enhance backend intelligence.
• Collaborate with cross-functional teams in an Agile/Kanban environment to deliver high-quality, maintainable solutions.
• Ensure compliance with best practices in the software development life cycle, security, and maintenance standards.
• Optimize performance, scalability, and resilience of backend systems in cloud-native environments.
• Contribute to CI/CD pipelines, infrastructure automation, and deployment workflows.
• Mentor and guide junior developers, fostering a culture of technical excellence and knowledge sharing.

Location: POL Krakow - ul. Lubomirskiego 20, Unity Tower 14th Flr

Why join us?

• Work on cutting-edge backend and cloud-native solutions.
• Collaborate with talented professionals in an Agile-driven environment.
• Access to modern technology stacks, including AI/ML and automation frameworks.
• Opportunities for career growth and mentorship in a fast-paced, innovative setting.

Qualifications & Skills:

Required:

• 5-8 years of experience in backend development.
• Strong proficiency in Python, with practical experience in building APIs and microservices.
• Experience with PHP (Symfony framework) and PostgreSQL.
• Hands-on experience with cloud-native development, preferably in Azure (AWS or GCP experience is a plus).
• Expertise in API management, microservices architecture, and API authentication protocols (OAuth, JWT, etc.).
• Experience with Kubernetes, Terraform, and Docker for containerized and cloud-based deployments.
• Familiarity with Agile methodologies (Scrum/Kanban) and CI/CD best practices.
• Proven experience in mentoring and guiding junior team members.

Nice to have:

• Experience in designing and implementing AI solutions like LLMs, vector databases, or RAG pipelines.
• Experience in frontend development (React) is a plus for full-stack capability.
• Experience in C# and MS SQL is a plus.
• Familiarity with queueing systems such as Azure Service Bus.