java software engineer

Nov 10, 2026 · Code.Hub

Αττική·Nov 10, 2026

ΑττικήHybridΠληροφορικήPermanentFull Time

JOBILY AI SUMMARY

What you'll do

Lead analysis, design, development and optimization initiatives across enterprise applications
Identify performance bottlenecks and implement solutions to improve scalability, efficiency and reliability
Ensure application performance and stability under high-load, mission-critical conditions
Contribute to architectural improvements, modernization initiatives and technical debt reduction
Optimize distributed systems, microservices and event-driven architectures
Perform JVM tuning, system profiling and database optimization
Support deployments, monitor application health and contribute to system stability
Collaborate with engineering, architecture, DevOps and other technical teams

Key requirements

5+ years' experience
Java enterprise development with Spring Boot, Hibernate, JPA and JavaEE/JakartaEE
Performance optimization, JVM tuning and profiling
Distributed systems, microservices and event-driven architectures
Kubernetes and Docker
Oracle SQL optimization
RabbitMQ and REST APIs with OAuth2/OIDC

Benefits

Hybrid working model, signing bonus, brand new equipment, private health insurance, learning and development opportunities, LinkedIn Learning access, degree sponsorship, mentoring, performance planning, internal competitions and rewards, and referral bonus.

About the job

Our Gaming project sits at the intersection of technology, performance and scale, powering high-traffic, mission-critical systems in one of the most dynamic digital industries. It offers the opportunity to work on complex engineering challenges where scalability, reliability and performance are at the heart of the technology.

Language Requirement: English, Greek

Minimum Years of Experience: 5

Key Responsibilities

Leading analysis, design, development and optimization initiatives across enterprise-level applications.
Identifying performance bottlenecks and implementing solutions to improve system scalability, efficiency and reliability.
Ensuring application performance and stability under high-load and mission-critical conditions.
Contributing to architectural improvements, modernization initiatives and technical debt reduction.
Optimizing distributed systems, microservices and event-driven architectures.
Performing JVM tuning, system profiling and database optimization.
Supporting deployment processes, monitoring application health and contributing to ongoing system stability.
Collaborating closely with engineering, architecture, DevOps and other technical teams to deliver robust and scalable solutions.

Required Qualifications

Strong professional experience in enterprise-level Java development.
Strong hands-on expertise with Java, Spring Boot, Hibernate, JPA and JavaEE/JakartaEE.
Proven experience in performance optimization, performance tuning and scalability improvements within distributed systems.
Hands-on experience with Kubernetes, Docker and containerized environments.
Solid knowledge of Oracle SQL optimization, query performance and database tuning.
Strong experience with JVM tuning, profiling and troubleshooting.
Experience designing and working with microservices and event-driven architectures.
Experience with messaging technologies such as RabbitMQ.
Familiarity with monitoring and observability tools such as Grafana and ELK Stack.
Experience with load and performance testing tools such as JMeter or Gatling.
Strong understanding of REST APIs, OAuth2/OIDC and system integration patterns.
Ability to work effectively with high-load, highly available and mission-critical systems.
Strong analytical and problem-solving capabilities.
Excellent communication, collaboration and stakeholder-management skills.

Tech Stack

Java | Spring Boot | Hibernate | JPA | JavaEE/JakartaEE | Microservices | Kubernetes | Docker | Oracle SQL | RabbitMQ | REST APIs | OAuth2/OIDC | Grafana | ELK | JMeter | Gatling | JVM Profiling & Tuning

Nice-to-Have Skills

Experience working in Gaming or other high-traffic digital environments.
Exposure to application modernization and technical debt reduction initiatives.
Experience collaborating with Architecture and DevOps teams on performance-related improvements.
Familiarity with enterprise-scale, mission-critical application environments.
Experience contributing to system architecture and scalability improvements.

Salary (Ind.): 3200-3600 € / Per month Gross

Let’s Talk About Us

Hybrid working model.
Signing Bonus.
Brand new equipment.
Exciting & friendly work environment.
Career & competencies’ development.
Continuous learning & development experience based on infinity model through Code.Hub’s Code.Learn.
L&D plan for your career improvement.
A truly open, inclusive, and competitive-free environment to grow your skills and have fun!
Internal competitions & rewards.

Let’s Talk About Code.Hub-ers

You are eligible to free LinkedIn trainings.
You are eligible to have free pass to all training Code.Learn activities after 6 months from your induction.
Training & Tech Mentor for your induction.
Unlimited access to LinkedIn Learning platform (1st semester).
Sponsoring of a Bachelor and/or Master’s Degree from Athens Tech College.
Private Health Insurance.
Performance planning each six months and each two years planning of promotion.
Cocktail Fridays @ our offices.
Referral Bonus.