Senior Java Software Engineer – Hybrid

1 day ago

Athens, Attica, Greece DT-tech Full time €24,000 - €72,000 per year

Senior Java Software Engineer – Hybrid

We are seeking an experienced Senior Java Software Engineer with proven expertise in performance optimization and scalable system design to join our engineering team.

The successful candidate will play a critical role in fine-tuning our systems to run efficiently under heavy loads while ensuring scalability to meet growing business demands.

Key Responsibilities

  • Optimize and scale distributed, mission-critical applications for performance, resilience, and efficiency.
  • Enhance and maintain Java-based systems across both legacy (Java 8) and modern versions (up to Java 21+).
  • Improve the performance of applications running on WildFly and Spring Boot, ensuring high availability.
  • Design and implement solutions for containerized deployments using Kubernetes and Docker.
  • Collaborate with cross-functional teams to ensure robust system design, scalability, and reliability.
  • Conduct system profiling, JVM tuning, and GC strategy optimization to maximize throughput.
  • Apply clean code principles and architectural best practices in system design and implementation.

Requirements

  • Extensive experience in high-performance, customer-facing, scalable environments with elastic loads.
  • Proven hands-on work with Java (8–21+) and optimization of distributed applications.
  • Strong knowledge of microservices architecture, event-driven systems, and streaming technologies.
  • Solid expertise with WildFly, Spring Boot, and containerization of monolithic applications.

System Architecture & Performance

  • Kubernetes & Docker for deployment and orchestration.
  • JVM performance profiling, garbage collection strategies, and tuning.
  • Advanced Oracle SQL performance tuning, indexing, and query optimization.
  • Familiarity with Redis or other key-value stores for caching and performance.
  • Hands-on experience with RabbitMQ and distributed messaging patterns.
  • Strong understanding of OAuth2 and OIDC for secure authentication/authorization.

Tools & Monitoring

  • Proficiency with build tools (Gradle, Maven) and version control (Git).
  • Monitoring and observability using Grafana, ELK Stack, and related tools.
  • Load testing with JMeter, Gatling, or equivalent tools.
  • Comfort with Linux systems and Bash scripting.

Soft Skills

  • Detail-oriented with focus on clean, maintainable, and high-quality code (Clean Code, Clean Architecture).
  • Strong team collaboration skills and experience working in Agile environments.
  • Excellent communication skills, with the ability to convey complex technical concepts clearly to both technical and non-technical stakeholders.

What's in it for you

  • Competitive salary & benefits package.
  • Flexible hybrid work model.
  • Unlimited access to learning resources, certifications, and trainings.
  • Special employee discounts and perks.

Είδος Εργασίας: Πλήρης απασχόληση

Αμοιβή: 1.600,00€ ,00€ ανά μήνα

  • Senior C#/Java Software Engineer

    1 week ago

    Athens, Attica, Greece Egon Software Greece Full time €45,000 - €75,000 per year

    Company Overview:Egon Software Pvt. Ltd. (ESL) is a wholly owned subsidiary of Egon Holdings SA, a Luxembourg-based company. Egon Holdings (EHS) is a privately owned conglomerate with diverse interests inDiamonds & Jewelry, Mining, Real Estate, and Investments, conducting operations in13 countrieswith a strong reputation for service reliability and...

  • Senior Java Software Engineer

    7 days ago

    Athens, Attica, Greece iKnowHow S.A. Full time €65,000 - €85,000 per year

    IKH is a leading Software & Robotics Solutions company operating internationally. Within just a couple of years, our team has grown up by more than 80%, we moved into a new spacious and modern office, and we kicked off 2025 with several new and exciting projects in digital transformation, custom software and robotics.We are now looking for an...

  • Senior Java Software Engineer

    7 days ago

    Athens, Attica, Greece iKnowHow S.A. Full time €40,000 - €80,000 per year

    IKH is a leading Software & Robotics Solutions company operating internationally. Within just a couple of years, our team has grown up by more than 80%, we moved into a new spacious and modern office, and we kicked off 2025 with several new and exciting projects in digital transformation, custom software and robotics.We are now looking for an...

  • Senior Java Software Engineer

    7 days ago

    Athens, Attica, Greece IKNOWHOW SA Full time €35,000 - €60,000 per year

    IKHis a leading Software & Robotics Solutions company operating internationally. Within just a couple of years, our team has grown up by more than 80%, we moved into a new spacious and modern office, and we kicked off 2025 with several new and exciting projects in digital transformation, custom software and robotics.We are now looking for an...

  • Senior Java Software Engineer

    7 days ago

    Athens, Attica, Greece Byte Computer S.A. Full time €60,000 - €80,000 per year

    Company DescriptionBYTE COMPUTER S.A is a leading Information Technology and Communications (ICT) Integrator in Greece, with over 30 years of dynamic presence in the ICT market focusing on the private sector. BYTE also ranks among the top five ICT vendors for projects in the Greek public sector, contributing significantly to the national economy. BYTE's...

  • Senior Java Engineer

    1 day ago

    Athens, Attica, Greece Uni Systems Full time €30,000 - €60,000 per year

    At Uni Systems, we are working towards turning digital visions into reality. We are continuously growing and looking for a Senior Java Engineer to join our UniQue Public Administration and Enterprise Projects team.In this role, you will have the opportunity to work closely with our customers in the public sector and you will be responsible for developing...

  • Java Software Engineer

    1 week ago

    Athens, Attica, Greece iKnowHow S.A. Full time €35,000 - €60,000 per year

    Description IKH is a leading Software & Robotics Solutions company operating internationally. Within just a couple of years, our team grew up more than 80%, we moved into a new spacious and modern office, and we kicked off 2025 with several new and exciting projects in digital transformation, custom software and robotics. We are now looking for an...

  • Java Software Engineer

    7 days ago

    Athens, Attica, Greece iKnowHow S.A. Full time €30,000 - €60,000 per year

    IKH is a leading Software & Robotics Solutions company operating internationally. Within just a couple of years, our team grew up more than 80%, we moved into a new spacious and modern office, and we kicked off 2025 with several new and exciting projects in digital transformation, custom software and robotics.We are now looking for an experienced Java...

  • Java Software Engineer

    1 week ago

    Athens, Attica, Greece iKnowHow S.A. Full time €30,000 - €60,000 per year

    IKH is a leading Software & Robotics Solutions company operating internationally. Within just a couple of years, our team grew up more than 80%, we moved into a new spacious and modern office, and we kicked off 2025 with several new and exciting projects in digital transformation, custom software and robotics.We are now looking for an experienced Java...

  • Senior Java Engineer

    2 weeks ago

    Athens, Attica, Greece Uni Systems Full time €60,000 - €90,000 per year

    At Uni Systems, we are working towards turning digital visions into reality. We are continuously growing, and we are looking for a Senior Java Engineer to join our UniQue team.What will you be bringing to the team?Lead the design, development and optimization of enterprise Java-based applications using Spring, Java EE, or QuarkusDefine and enforce software...