Senior Java Developer

About the Role

We are looking for an experienced Senior Java Developer to join our engineering team and help design, build, and maintain scalable, reliable, and high-performance backend systems.

You will work closely with product managers, architects, QA engineers, DevOps engineers, and other developers to deliver high-quality software solutions. You will also contribute to system architecture, technical decision-making, code quality, and engineering best practices.

Responsibilities

• Design, develop, test, and maintain scalable backend applications using Java and Spring Boot.

• Design and implement RESTful APIs and distributed services.

• Participate in system architecture and technical solution design.

• Build reliable and high-performance microservices and distributed systems.

• Work with relational and NoSQL databases, including database schema design, query optimization, and performance tuning.

• Integrate with internal and external systems through APIs, messaging systems, and event-driven architectures.

• Troubleshoot complex production issues and perform root cause analysis.

• Improve application performance, scalability, availability, and security.

• Write clean, maintainable, testable, and well-documented code.

• Conduct code reviews and ensure engineering standards and best practices are followed.

• Collaborate with DevOps/SRE teams on deployment, monitoring, CI/CD, and production operations.

• Participate in technical discussions and contribute to architecture and technology decisions.

• Mentor junior and mid-level developers and provide technical guidance.

• Continuously improve development processes, engineering practices, and system reliability.

Requirements

• Bachelor's degree in Computer Science, Software Engineering, or a related field, or equivalent practical experience.

• 5+ years of professional software development experience, with strong experience in Java backend development.

• Strong knowledge of Java 8/11/17+ and the Java ecosystem.

• Solid experience with Spring Boot, Spring Framework, Spring MVC, and Spring Data.

• Strong understanding of object-oriented programming, design patterns, data structures, and algorithms.

• Experience building and maintaining microservices and distributed systems.

• Strong knowledge of REST APIs, HTTP, JSON, and API design principles.

• Hands-on experience with relational databases such as PostgreSQL, MySQL, or Oracle.

• Experience with caching technologies such as Redis.

• Experience with messaging systems such as Kafka, RabbitMQ, or similar technologies.

• Good understanding of concurrency, multithreading, JVM internals, and application performance optimization.

• Experience with Git, Maven/Gradle, Docker, and CI/CD pipelines.

• Familiarity with cloud platforms such as AWS, Azure, or Google Cloud.

• Strong troubleshooting and problem-solving skills.

• Good understanding of software engineering principles, including SOLID, Clean Code, automated testing, and code review practices.

• Good communication skills and ability to work effectively in an international and cross-functional team.

• Professional working proficiency in English.

Nice to Have

• Experience with Kubernetes and container orchestration.

• Experience with high-availability and high-concurrency systems.

• Experience with event-driven architecture and domain-driven design (DDD).

• Experience with observability tools such as Prometheus, Grafana, ELK.

• Experience with database sharding, distributed transactions, or large-scale data processing.

• Knowledge of application security, OAuth 2.0, OIDC, JWT, and API security.

• Experience working in FinTech, Banking, Payments, E-commerce, or other high-transaction-volume industries.

• Experience designing systems with strict requirements around reliability, consistency, reconciliation, and auditability.