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Sharp Brains

Java Software Engineer

Sharp Brains
Poland · Full-time · Associate

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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Country Guide

Poland

Fast-growing Central European IT hub

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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