Senior Backend Engineer

We are looking for a Senior Backend Enginee r with strong technical and communication skills to contribute throughout the development lifecycle of products in various exciting domains, which are realized with Commencis’ expertise in a fast-paced team environment.

If you are curious by nature, adaptive, collaborative, and always one step ahead, then join us and be a Commencer!

Responsibilities

• Design, develop, and maintain scalable and high-performance backend systems using Java and Spring Framework (Spring Boot, Spring MVC, Spring Data, Spring Security, etc.)
• Contribute to system architecture decisions and lead the design of both monolithic and microservices-based solutions
• Develop and maintain Backend-for-Frontend (BFF) layers and core backend services to support scalable applications
• Strong understanding of design principles, design patterns, and architectural best practices (DDD, TDD, and layered architecture)
• Build and maintain RESTful APIs and ensure high availability and performance
• Collaborate with cross-functional teams including product, design, and QA to deliver high-quality solutions
• Ensure code quality through code reviews, best practices, and clean code principles
• Write and maintain unit and integration tests
• Troubleshoot, debug, and optimize existing systems
• Participate in CI/CD processes and support deployment activities
• Mentor junior developers and contribute to team knowledge sharing
• Stay up to date with emerging technologies and industry best practices

Qualifications

• BSc/MSc/PhD degree in Computer Science or a related field, or equivalent practical experience
• At least 5 years of professional experience in backend development with Java Strong experience with Spring Framework (Spring Boot, Spring MVC, Spring Data, Spring Security, etc.)
• Strong understanding of OOP principles, design patterns, and scalable system design
• Experience with microservices architecture and distributed systems
• Hands-on experience with relational and non-relational databases (e.g., PostgreSQL, MySQL, MongoDB, Redis)
• Familiarity with message brokers (e.g., Kafka, RabbitMQ) is a plus
• Basic knowledge of front-end technologies such as JavaScript, HTML5 and CSS3
• Strong unit test and debugging skills
• Proficiency in code versioning tools such as Git
• Familiarity with CI/CD pipelines and DevOps practices is a plus
• Strong sense of analytical thinking and problem-solving skills
• Excellent attention to detail
• Highly effective time management and multitasking skills
• Strong verbal and written communication skills in English
• Experience with AI technologies and a strong interest in learning and applying them in real-world use cases
• Proficiency in AI-assisted development practices, with the ability to effectively integrate AI tools into daily software development workflows.
• Experience or domain knowledge in banking and financial services is considered a plus