Senior Backend Engineer

About the role

We are looking for a Senior Backend Engineer 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