Senior Java Engineer

Quick Facts

• Role: Senior Java Engineer

• Employment: Full-time (B2B), remote working possible

• Salary: B2B 37 E/h + VAT

Description

You will own the full lifecycle of backend development—design, development, testing, deployment, and maintenance—within a cross-functional agile team. The role focuses on building RESTful APIs and microservices with Java and Spring Boot, as well as serverless and event-driven systems using Kafka and AWS. You’ll also ensure reliability during high-traffic events and document system architecture.

Responsibilities

• Own the full software development lifecycle (design, development, testing, deployment, maintenance)

• Design and build backend services with RESTful APIs and microservices

• Build serverless and event-driven systems (serverless services and data pipelines with Kafka/queues)

• Create and maintain secure integrations with external APIs (auth flows, webhooks)

• Document system architecture with sequence diagrams showing service interactions and data flow

• Design, implement, and maintain databases and caching layers (modeling, integrity, performance, maintainability)

• Apply DevOps practices by managing/improving CI/CD pipelines (GitLab CI/CD)

• Use infrastructure as code with Terraform and Kubernetes to scale across cloud regions

• Monitor production services, investigate incidents, and keep systems reliable

• Review code, provide feedback, and share knowledge

• Work in an agile way and adapt to changing requirements

Requirements

• 5+ years of backend development experience

• Strong Java and Spring Boot skills, including build tooling such as Gradle

• Experience designing, consuming, and architecting REST APIs

• Hands-on AWS experience: Lambda, DynamoDB, S3, SQS, EventBridge

• Experience with Kafka or similar messaging systems

• Hands-on NoSQL databases and caching (e.g., DynamoDB, Redis)

• Solid understanding of OAuth 2.0 and secure handling of user data

• Experience writing unit and integration tests for distributed systems

• Ability to produce sequence diagrams and technical documentation

• Proficiency with CI/CD tools, especially GitLab CI/CD

• Experience with Terraform and Kubernetes

• Fluent English

• Openness and adaptability to learn new tools/technologies

• Hands-on experience with AI coding assistants and the judgment to validate AI-generated code

Benefits

• Friendly, open-door environment with strong community and experienced colleagues

• Growth focus on large-scale projects with global impact

• Tailored learning: meetups, conferences, workshops, Udemy access, language courses, and paid certifications

• Internal mobility to explore diverse domains

• Flexibility with full remote working possibilities

• Company-paid premium medical package through Luxmed

• MyBenefit cafeteria platform to choose perks