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Position: Java Application Developer
Contract: B2B Freelance
Location: Poznan, Poland (Onsite)
Duration: 6-12 Months - Extendable
Job Description:
- Extensive experience in Java/J2EE application development.
- Lead architecture reviews, design sessions, and technical decision-making across teams.
- Collaborate closely with business stakeholders, product owners, and engineering leadership to align technical solutions with business goals.
- Evaluate, recommend, and drive adoption of appropriate technology stacks, frameworks, and tools.
- Strong expertise in Core Java (Java 17 and above), including JVM internals, concurrency, and performance optimization.
- Extensive hands-on experience with the Spring ecosystem, including Spring Boot, Spring Cloud, and Spring Security.
- Proven ability to design and implement scalable microservices and distributed systems.
- In-depth knowledge of RESTful API design, API gateways, and service mesh architectures.
- Hands-on experience with ORM frameworks such as Hibernate and JPA.
- Deep understanding of both SQL and NoSQL databases, including PostgreSQL, Oracle, MongoDB, and Cassandra.
- Experience working with messaging and streaming platforms such as Kafka, RabbitMQ, and ActiveMQ.
- Strong command of design patterns, SOLID principles, and Domain-Driven Design (DDD).
Key Skills
Ranked by relevance
java
design patterns
microservices
spring boot
postgresql
rabbitmq
oracle
nosql
kafka
cloud
sql
jvm
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- Posted
- Jan 27, 2026
- Type
- Full-time
- Level
- Associate
- Location
- Poznan Metropolitan Area
- Company
- Sharp Brains
Industries
Technology
Information
Media
Categories
Information Technology
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3 roles aligned with this opportunity
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