Java Developer · IT Recruiting
Senior Java developers who make your backend stable, scalable and maintainable
Sample profiles from our network
Sample profile: Senior Java Backend Engineer with streaming focus
More than 10 years of experience with distributed and event-driven systems. As Java team lead, owned the backend architecture of a social media platform handling more than 10,000 requests per second – including sharding, caching and search. Today builds Kafka and Flink pipelines for network monitoring. Focus: Java 17, Spring Boot, Kafka, Flink, Kubernetes, AWS.
Sample profile: Senior Java Developer with microservices focus
13 years of Java development experience. Led the integration of new banking partners for a banking-as-a-service platform from requirements to go-live and has migrated monoliths to microservices. Experience in logistics, retail and fintech. Focus: Java 21, Spring Boot, CQRS, Kafka, MongoDB, Oracle. Oracle Certified Professional.
Sample profile: Senior Java Engineer with trading experience
Builds integrations for an internationally established trading venue – with the FIX protocol, low-latency optimization and JVM tuning. Previously developed personalization services for a major US sports media platform and data pipelines on Google Cloud. Focus: Java 17, Spring, Kafka, Cassandra, GCP. Google Cloud Associate Cloud Engineer.
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Request profilesWhat does a senior Java developer do?
A senior Java developer builds and owns the backend systems your business runs on: APIs, business logic, data storage and integrations with third-party systems. Typical tools are Spring Boot, Hibernate/JPA, relational and NoSQL databases and messaging with Apache Kafka.
The difference to a mid-level profile isn't syntax, it's decisions: how to cut a service, how to keep a system stable under load, how to modernize a monolith without downtime – and how to write code your team will still understand in five years.
Core tasks of a senior Java developer
Backend architecture & microservices
Cuts services sensibly, chooses fitting patterns such as event-driven or CQRS and keeps the architecture maintainable for years.
APIs & integrations
Builds REST and GraphQL APIs and connects partners, payment providers or business systems cleanly – up to protocols like FIX.
Performance & scaling
Optimizes database access, caching and concurrency so your system responds reliably even under high load.
Event streaming & data processing
Builds pipelines with Kafka, Kafka Streams or Flink for real-time processing, monitoring and reporting.
Code quality & testing
Secures changes with unit, integration and contract tests and makes code reviews a fixed part of development.
Modernization & ownership
Moves legacy systems step by step to modern architectures, plans migrations with fallbacks and supports junior developers.
Technologies this role brings
When you need a senior Java developer
New features take longer and longer because every change to a grown monolith has unexpected side effects. Under load, response times climb, database queries become the bottleneck and outages hit your customers directly. At the same time, interfaces to partners, payment providers or business systems depend on code that hardly anyone on the team fully understands anymore.
At the latest when a move to microservices is due, your product needs to grow significantly or your internal team can no longer keep up with the backlog, you need experienced developers who take ownership. These are exactly the situations in which companies contact us.
How the hiring process works
Intro call (30 minutes)
You tell us about your project, tech stack and timeline. Together we sharpen the role profile.
Direct interviews
You talk directly to the shortlisted candidates – no lengthy pre-screening loops.
Contract & start
Once you approve, we handle contract and onboarding. The start is possible from one week.
Let's talk about your backend
Book an intro callFrequently asked questions
Senior profiles make architecture and technology decisions, own systems all the way into production and spot risks early. Our sample profiles have led backend teams, modernized monoliths and run systems under high load.
