Senior Java Engineer

3 dni temu

Gdańsk, Pomerania, Polska Scalac Pełny etat 60 000 € - 180 000 € rocznie

Senior Java Engineer (Java 21 / Kafka / Spring)
B2B | Hybrid | Location: Gdańsk or Warsaw
Project:
Modernization of a banking-sector system

Rate:
30 EUR/h

Join a project focused on modernizing and optimizing a long-standing legacy system. The current architecture struggles to meet evolving business requirements, and the system requires deep analysis and refactoring to reach the target performance level of
around 2500 requests per second
.

You will work in an environment with 4 microservices and a team of
6 experienced engineers
. Your role will be crucial in performance engineering, data integration, and modernizing Kafka-based components.

Responsibilities

  • Analyzing current system performance and implementing improvements to achieve ~2500 req/s.
  • Optimizing communication between microservices and working with distributed systems.
  • Enhancing data flows (Kafka) and refactoring legacy components.
  • Developing and expanding APIs and service-level components.
  • Working in a client-facing role and closely collaborating with a 6-person team.
  • Resolving issues related to data quality and consistency.
  • Preparing the system for increased load with a deadline set for April 2026.

Requirements

  • Minimum 5 years of experience as a Java Engineer or Data Engineer.
  • Good knowledge of Java 21, Kafka, and Spring.
  • Experience working with distributed systems and microservice architecture.
  • Practical experience in API development and data engineering (data transmission and processing).

About Scalac
For over 10 years, Scalac has been delivering high-quality software, successfully aiding FinTechs, HealthTechs, EdTechs, AdTechs, and startups in their efforts to scale. What's our secret? There is none - just choosing the best technologies and connecting you with the top specialists to implement them. All done by working remotely

With over 50 experts on board, from 13 different countries - in Scala, Java, Spark, Rust, Akka, React, Angular, Kafka, blockchain, and more - there is no project we couldn't enhance, no process we're not able to support, and no software we couldn't deliver from start to finish.

Sounds like a fit?

Apply now and join our team

  • Senior Java Engineer

    3 dni temu

    Gdańsk, Pomerania, Polska Scalac Pełny etat 160 000 € - 200 000 € rocznie

    Senior Java Engineer (Java 21 / Kafka / Spring)B2B | Hybrid | Location: Gdańsk or Warsaw Project: Modernization of a banking-sector systemRate: 30 EUR/hJoin a project focused on modernizing and optimizing a long-standing legacy system. The current architecture struggles to meet evolving business requirements, and the system requires deep analysis and...

  • Senior Java Engineer

    18 godzin temu

    Gdańsk, Pomerania, Polska Scalac Pełny etat

    Senior Java Engineer (Java 21 / Kafka / Spring)B2B | Hybrid ( 1-2x every two months at the office).Location: Gdańsk or Warsaw Project: Modernization of a banking-sector systemRate: 30-50 EUR/hJoin a project focused on modernizing and optimizing a long-standing legacy system. The current architecture struggles to meet evolving business requirements, and...

  • Senior Java Developer

    5 dni temu

    Gdańsk, Pomerania, Polska Develocraft Pełny etat 80 000 zł - 96 000 zł rocznie

    Senior Software Engineer – JavaAbout the roleWe are Develocraft, and we're looking for a Senior Java Software Engineer to join our client's engineering team working on cutting-edge financial technology solutions. You'll take part in designing and building scalable backend systems and APIs that handle large amounts of data in secure cloud environments. If...

  • Senior Java Architect

    3 dni temu

    Gdańsk, Pomerania, Polska Scalac Pełny etat 60 000 € - 120 000 € rocznie

    Senior Java Architect (Java 21 / Kafka / Spring)B2B | Hybrid | Location: Gdańsk or WarsawProject:Modernization of a banking-sector systemRate: EUR/hJoin a project focused on modernizing and optimizing a long-standing legacy system. The current architecture struggles to meet evolving business requirements, and the system requires deep analysis and...

  • Senior Java Software Engineer

    5 dni temu

    Gdańsk, Pomerania, Polska Dynatrace Pełny etat 144 000 zł - 300 000 zł rocznie

    Your role at DynatraceYou will work on a product that processes and integrates data collected from a distributed debugger running invisibly in complex production environments.You will develop enterprise Java service working in on-premises environments.As Java enterprise engineer you will be responsible for implementing and maintaining features covering...

  • Senior Fullstack Engineer Java/Angular

    7 dni temu

    Gdańsk, Pomerania, Polska Dynatrace Pełny etat 80 000 zł - 120 000 zł rocznie

    Your role at DynatraceDynatrace is the world's leading Software Intelligence monitoring platform, delivering answers—not just data—about application performance and end-user experience. We're looking for experienced Software Engineers who are passionate not only about technology but also about people.Your role:You will work on a product that processes...

  • Middle Java Software Engineer

    7 dni temu

    Gdańsk, Pomerania, Polska Ciklum Pełny etat 60 000 zł - 80 000 zł rocznie

    Ciklumis looking for aMiddle Java Software Engineerto join our team in Poland.We are a custom product engineering company that supports both multinational organizations and scaling startups to solve their most complex business challenges. With a global team of over 4,000 highly skilled developers, consultants, analysts and product owners, we engineer...

  • Senior Java Developer

    7 dni temu

    Gdańsk, Pomerania, Polska B2B S.A Pełny etat 900 000 zł - 1 200 000 zł rocznie

    Dołącz do zespołu technologicznego Nordea, który tworzy nową, wspólną platformę API dla krajów nordyckich (Nordea API Platform).Projekt wspiera wdrożenie regulacji PSD2/PSD3 i rozwój usług Open Banking.To strategiczna inicjatywa bankowa, która łączy nowoczesną architekturę mikroserwisową z bezpieczeństwem klasy enterprise.Lokalizacja:...

  • Senior Software Engineer

    5 dni temu

    Gdańsk, Pomerania, Polska Acoustic, L.P. Pełny etat 60 000 zł - 120 000 zł rocznie

    Senior Software EngineerWe expect you to have:8+ years of commercial experience with Java.Experience with ORM technologies.Experience with Spring/JEE.Experience with database design: Relational Databases.Experience with building web services (REST).Experience with messaging technologies.Knowledge of testing methodologies (such as TestNG, JUnit,...

  • Senior Test Automation Engineer with Python or Java

    7 dni temu

    Gdańsk, Pomerania, Polska Nordea Asset Management Portugal Pełny etat 50 000 zł - 100 000 zł rocznie

    Senior Test Automation Engineer with Python or Java - Cards TechnologyGdańsk, PL, Gdynia, PL, Warszawa, PL, Helsinki, FI, 500Job ID: 30711Would you like to join a team delivering competitive, streamlined and compliant card products for everyday spending to our customers.At Nordea, we are at the forefront of a technology-driven revolution in banking,...