Backend Developer

🏢 Summary: The offer is for a backend-focused engineer working on modernising Java/Scala services and data pipelines, upgrading core frameworks, and migrating authentication to OAuth. The role involves heavy work with Spark-based batch pipelines and Play Framework services, with opportunities to apply GenAI tooling for large-scale code transformations. DevOps experience with build systems and CI/CD is an advantage. 🗂️ Requirements: Hands-on experience with production Java services, Hands-on experience with production Scala services, Familiarity with Play Framework internals, Experience with Spark for data pipelines, Experience with OAuth-based authentication patterns, Ability to modernise and upgrade JDK, Scala, and Play Framework versions, Experience building batch data migration pipelines, Experience extending and maintaining backend services 📃 Skills: Java, Scala, Play, Spark, OAuth, React, TypeScript, Gradle, CI/CD, JDK, GenAI 🏢 Description: What we're looking for • Hands-on experience with production Java/Scala services • Familiarity with the Play Framework internals • Spark experience for pipeline-heavy work • Comfortable with OAuth-based authentication patterns • React/TypeScript familiarity is a plus • For DevOps-leaning candidates: experience with build systems (Gradle), scripting, and CI/CD pipelines Example of work tasks • Modernise backend services and pipelines: upgrade to latest JDK, Scala 3.x, and Play Framework 3.x • Apply GenAI tooling throughout to automate code transformations, dependency resolution, and compatibility fixes — producing reusable tools, prompts, and a documented runbook • Migrate authentication across a large number of backend services from a legacy API to an OAuth-based solution. • Replace per-unit data stores with a single versioned table: build Spark/ Java batch pipelines for backfill/migration and extend Scala/Play backends

🏢 Summary: Backend Developer role focused on modernizing and optimizing backend services, upgrading core technologies, and implementing automation using GenAI tooling. The position involves migrating authentication systems to OAuth, consolidating data stores, and building Spark-based batch pipelines. It emphasizes performance improvements, scalable architecture, and robust backend engineering practices. 🗂️ Requirements: Hands-on experience with production Java services, Hands-on experience with production Scala services, Familiarity with Play Framework internals, Experience with Spark for pipeline-heavy workloads, Experience with OAuth-based authentication patterns 📃 Skills: Java, Scala, Play, Spark, OAuth, JDK, GenAI 🏢 Description: Summary The Backend Developer role is aimed at enhancing and modernizing backend services and pipelines within the organization. This position primarily focuses on improving system performance, ensuring robust authentication mechanisms, and implementing automation to streamline processes. Main Responsibilities Modernise backend services and pipelines by upgrading to the latest JDK, Scala 3.x, and Play Framework 3.x. Apply GenAI tooling to automate code transformations, dependency resolution, and compatibility fixes, producing reusable tools and documentation. Migrate authentication frameworks from legacy APIs to OAuth-based solutions across various backend services. Replace multiple data stores with a single versioned table, creating Spark/Java batch pipelines for backfill/migration and extending Scala/Play backends. Key Requirements Hands-on experience with production Java/Scala services. Familiarity with Play Framework internals. Experience with Spark for pipeline-heavy work. Comfortable with OAuth-based authentication patterns. Nice to Have Familiarity with React/TypeScript. For DevOps-leaning candidates: experience with Gradle, scripting, and CI/CD pipelines. Other Details Location: Not specified. Team Structure: Not specified. Tools/Methodologies: Java, Scala, Play Framework, Spark, OAuth.

🏢 Summary: Full-time hybrid Backend Developer contract focused on modernizing backend services, migrating authentication systems to OAuth, and building Spark-based data migration pipelines. The role involves upgrading Java/Scala ecosystems, automating transformations with GenAI tooling, and extending Scala/Play Framework backends in an English-speaking international environment. 🗂️ Requirements: Production experience with Java, Production experience with Scala, Knowledge of Play Framework internals, Experience with Spark, Knowledge of OAuth authentication patterns, Availability for hybrid work in Krakow, English proficiency 📃 Skills: Java, Scala, Play, Spark, OAuth, GenAI, React, TypeScript, Gradle, CI/CD 🏢 Description: Industry: Technology solutions - consumer electronics, software, streaming Client: global enterprise, Swedish entity Work model: full time, hybrid 3 days/week on-site fromKrakow (Equal Business Park) office Project language: English Onboarding : 3 days in Malmo, Sweden Start: ASAP or 1 week notice ideally / at latest start 27th July 2026 Assignment type: B2B Remuneration: up to 200 PLN/h net + VAT FTE: full-time Summary: The Backend Developer role is aimed at enhancing and modernizing backend services and pipelines within the organization. This position primarily focuses on improving system performance, ensuring robust authentication mechanisms, and implementing automation to streamline processes. Main Responsibilities: Modernise backend services and pipelines by upgrading to the latest JDK, Scala 3.x, and Play Framework 3.x. Apply GenAI tooling to automate code transformations, dependency resolution, and compatibility fixes, producing reusable tools and documentation. Migrate authentication frameworks from legacy APIs to OAuth-based solutions across various backend services. Replace multiple data stores with a single versioned table, creating Spark/Java batch pipelines for backfill/migration and extending Scala/Play backends. Key Requirements: Hands-on experience with production Java/Scala services . Familiarity with Play Framework internals or Akka. Experience with Spark for pipeline-heavy work. Comfortable with OAuth-based authentication patterns. Nice to Have: Familiarity with React/TypeScript. For DevOps-leaning candidates: experience with Gradle, scripting, and CI/CD pipelines.

🏢 Summary: Backend Developer role focused on modernizing and optimizing backend services and data pipelines, including migration to newer Java/Scala and Play Framework versions and implementation of OAuth-based authentication. The position involves automation with GenAI tools and Spark-based data migrations in a hybrid work model. B2B contract with onboarding in Sweden and full-time engagement in English. 🗂️ Requirements: Hands-on experience with production Java services, Hands-on experience with production Scala services, Experience with Play Framework internals, Experience with Spark for pipeline-heavy work, Experience with OAuth-based authentication patterns, Availability to work hybrid from Warsaw or Cracow office, Availability for 2-week onboarding in Malmo, Sweden, Fluency in English 📃 Skills: Java, Scala, Play, Spark, OAuth, JDK, GenAI, Gradle, CI/CD, React, TypeScript 🏢 Description: 🌍 Work mode: hybrid –  3 days from the Warsaw OR Cracow office. ⏳ Duration : > 3 months contracts . 🔍 Onboarding : 2 weeks in Malmo, Sweden. ⏰ Start : August 3rd at the latest. 📝 Contract : B2B > up 195 zl/h. ⚙️ Recruitment process : 2 meetings. 📕Project language : English. 💼 Industry : Technology. 💻 Workload : Full time (40 hours per week). Summary: The Backend Developer role is aimed at enhancing and modernizing backend services and pipelines within the organization. This position primarily focuses on improving system performance, ensuring robust authentication mechanisms, and implementing automation to streamline processes. Main Responsibilities: Modernise backend services and pipelines by upgrading to the latest JDK, Scala 3.x, and Play Framework 3.x. Apply GenAI tooling to automate code transformations, dependency resolution, and compatibility fixes, producing reusable tools and documentation. Migrate authentication frameworks from legacy APIs to OAuth-based solutions across various backend services. Replace multiple data stores with a single versioned table, creating Spark/Java batch pipelines for backfill/migration and extending Scala/Play backends. Key Requirements: Hands-on experience with production Java/Scala services . Familiarity with Play Framework internals. Experience with Spark for pipeline-heavy work. Comfortable with OAuth-based authentication patterns. Nice to Have: Familiarity with React/TypeScript. For DevOps-leaning candidates: experience with Gradle, scripting, and CI/CD pipelines. Other Details: Tools/Methodologies: Java, Scala, Play Framework, Spark, OAuth.

🏢 Summary: Backend Developer role focused on modernizing and optimizing backend services and data pipelines, including technology upgrades, authentication migration, and automation initiatives. The position involves working with Java/Scala ecosystems, Spark pipelines, and OAuth-based security in a hybrid model with onboarding in Sweden. B2B contract with competitive hourly rate and English as the project language. 🗂️ Requirements: Hands-on experience with production Java services, Hands-on experience with production Scala services, Familiarity with Play Framework internals, Experience with Spark for data pipelines, Experience with OAuth-based authentication patterns, Availability for hybrid work (3 days/week in Warsaw or Cracow), Availability for 2-week onboarding in Malmo, Sweden, Fluent English 📃 Skills: Java, Scala, Play, Spark, OAuth, Gradle, CI/CD, React, TypeScript 🏢 Description: 🌍 Work mode: hybrid –  3 days from the Warsaw OR Cracow office. ⏳ Duration : > 3 months contracts . 🔍 Onboarding : 2 weeks in Malmo, Sweden. ⏰ Start : August 3rd at the latest. 📝 Contract : B2B > up 200 zl/h. ⚙️ Recruitment process : 2 meetings. 📕Project language : English. 💼 Industry : Technology. 💻 Workload : Full time (40 hours per week). Summary: The Backend Developer role is aimed at enhancing and modernizing backend services and pipelines within the organization. This position primarily focuses on improving system performance, ensuring robust authentication mechanisms, and implementing automation to streamline processes. Main Responsibilities: Modernise backend services and pipelines by upgrading to the latest JDK, Scala 3.x, and Play Framework 3.x. Apply GenAI tooling to automate code transformations, dependency resolution, and compatibility fixes, producing reusable tools and documentation. Migrate authentication frameworks from legacy APIs to OAuth-based solutions across various backend services. Replace multiple data stores with a single versioned table, creating Spark/Java batch pipelines for backfill/migration and extending Scala/Play backends. Key Requirements: Hands-on experience with production Java/Scala services . Familiarity with Play Framework internals. Experience with Spark for pipeline-heavy work. Comfortable with OAuth-based authentication patterns. Nice to Have: Familiarity with React/TypeScript. For DevOps-leaning candidates: experience with Gradle, scripting, and CI/CD pipelines. Other Details Tools/Methodologies: Java, Scala, Play Framework, Spark, OAuth.

🏢 Summary: Hybrid Backend Developer role focused on modernizing and optimizing backend services, upgrading core technologies, and improving authentication and data pipelines. The project involves Java/Scala development, Play Framework upgrades, Spark-based batch processing, and OAuth migration. B2B contract with fast recruitment process and onboarding in Sweden. 🗂️ Requirements: Hands-on experience with production Java services, Hands-on experience with production Scala services, Familiarity with Play Framework internals, Experience with Spark for pipeline-heavy work, Experience with OAuth-based authentication patterns, Fluent English for project communication 📃 Skills: Java, Scala, Play, Spark, OAuth, JDK, GenAI, Gradle, CI/CD, React, TypeScript 🏢 Description: 🌍 Work mode: hybrid –  3 days from the Warsaw office. 🔍 Onboarding : 2 weeks in Malmo, Sweden. ⏰ Start : 1 week notice period, August 3rd at the latest. 📝 Contract : B2B > up 195 zl/h. ⚙️ Recruitment process : 1 meeting with the client. ⏳ Duration : > 3 months contracts + extensions. 📕Project language : English. 💼 Industry : Technology. 💻 Workload : Full time (40 hours per week). Summary: The Backend Developer role is aimed at enhancing and modernizing backend services and pipelines within the organization. This position primarily focuses on improving system performance, ensuring robust authentication mechanisms, and implementing automation to streamline processes. Main Responsibilities: Modernise backend services and pipelines by upgrading to the latest JDK, Scala 3.x, and Play Framework 3.x. Apply GenAI tooling to automate code transformations, dependency resolution, and compatibility fixes, producing reusable tools and documentation. Migrate authentication frameworks from legacy APIs to OAuth-based solutions across various backend services. Replace multiple data stores with a single versioned table, creating Spark/Java batch pipelines for backfill/migration and extending Scala/Play backends. Key Requirements: Hands-on experience with production Java/Scala services . Familiarity with Play Framework internals. Experience with Spark for pipeline-heavy work. Comfortable with OAuth-based authentication patterns. Nice to Have: Familiarity with React/TypeScript. For DevOps-leaning candidates: experience with Gradle, scripting, and CI/CD pipelines. Other Details Tools/Methodologies: Java, Scala, Play Framework, Spark, OAuth.

🏢 Summary: B2B contract for a remote Backend Java Developer responsible for designing and developing scalable microservices-based systems. The role focuses on building event-driven solutions, system integrations, and maintaining high performance and code quality in CI/CD environments. Long-term cooperation with full DevOps collaboration is offered. 🗂️ Requirements: Minimum 3 years of backend development experience in Java, Strong knowledge of Spring Boot, Spring Framework, Hibernate, Experience with messaging systems (Kafka or MQ), Practical experience with microservices architecture, Strong understanding of OOP and design patterns, Experience with Oracle or PostgreSQL and SQL, Experience with system integrations (REST, SOAP, JMS), Experience with Git and Maven or Gradle, Experience with CI/CD environments, Experience with Docker and Kubernetes, Ability to build scalable and high-performance systems, Higher education in Computer Science or related field 📃 Skills: Java, Spring, SpringBoot, SpringFramework, Hibernate, Kafka, MQ, Microservices, OOP, SQL, Oracle, PostgreSQL, REST, JSON, SOAP, XML, WSDL, JMS, Git, Maven, Gradle, CICD, Docker, Kubernetes 🏢 Description: Wymagania: Minimum 3 lata doświadczenia w programowaniu backendu w Java Dobra znajomość Spring (Spring Boot, Spring Framework, Hibernate) Doświadczenie w pracy z systemami kolejkowymi (np. Kafka, MQ) Praktyczna znajomość architektury mikroserwisowej Dobra znajomość OOP oraz wzorców projektowych Doświadczenie w pracy z bazami danych ( Oracle, PostgreSQL ) oraz znajomość SQL Znajomość integracji systemowych (REST, JSON, SOAP, XML, WSDL, JMS) Doświadczenie z narzędziami: Git, Maven lub Gradle Praktyka w środowisku CI/CD oraz konteneryzacji (Docker, Kubernetes) Umiejętność tworzenia wydajnych i skalowalnych rozwiązań Wykształcenie wyższe (informatyka lub kierunki pokrewne) Mile widziane: Doświadczenie w pracy w środowisku chmurowym (AWS, Azure, GCP) Znajomość narzędzi monitoringu i logowania (np. Prometheus, Grafana, ELK) Obowiązki: Projektowanie i rozwój aplikacji backendowych w technologii Java Tworzenie i rozwój systemów opartych o architekturę mikroserwisową Implementacja rozwiązań event-driven (np. z użyciem Kafka, MQ) Integracja systemów z wykorzystaniem REST, SOAP, JMS Współpraca z zespołem DevOps przy wdrożeniach CI/CD Dbanie o wydajność, skalowalność i jakość kodu Oferujemy: Kontrakt B2B z możliwością długoterminowej współpracy Praca 100% zdalna Prywatna opieka medyczna (Luxmed) Karta Multisport

🏢 Summary: Full-stack developer role focused primarily on Java backend (60%) with Angular frontend (40%) responsibilities. The position involves designing REST APIs, integrating messaging systems, implementing security, and working with databases and CI/CD pipelines in a containerized environment. 🗂️ Requirements: Proficiency in Java 11 or 17, Experience with Spring ecosystem (MVC, Boot, Batch, Security), Experience with JPA, Hibernate, Spring Data JPA, JDBC, Knowledge of REST API design and development, Strong SQL skills with MS SQL, Ability to analyze SQL queries using Query Plan, Experience with JWT and OAuth2, Experience with RabbitMQ or Kafka, Experience with Angular 8+, Knowledge of Maven, Proficiency with Git and Jenkins, Experience with Docker and Kubernetes or OpenShift, Ability to write unit tests using JUnit, Understanding of OOP, SOLID, ACID principles, Knowledge of C4 model 📃 Skills: Java, Spring, SpringBoot, SpringMVC, SpringBatch, SpringSecurity, JPA, Hibernate, JDBC, REST, SQL, MSSQL, QueryPlan, JWT, OAuth2, RabbitMQ, Kafka, Angular, npm, d3, Maven, Git, Jenkins, Docker, Kubernetes, OpenShift, JUnit, OOP, SOLID, ACID, C4 🏢 Description: Requirements description Knowledge of the Java language and its Enterprise features for Back End development, including technologies such as: Java 11, 17 Spring Ecosystem (Spring MVC, Spring Boot, Spring Batch, Spring Security, etc.) Database Access (JPA, Spring Data JPA, Hibernate, JDBC) Security protocols and technologies (JWT, Oauth2) Messaging systems (RabbitMQ, Kafka) UI Angular 8+, npm, d3 REST API Knowledge of database programming via SQL (MS SQL preferable), including SQL SQL analyzing tools, like Query Plan Knowledge of Build tools like Maven. An IDE like Eclipse or IntelliJ. Knowledge of Unit testing tools like JUnit and unit testing strategies. Knowledge container and orchestrator such as Docker, Kubernetes (and/or OpenShift) Knowledge of CI/CD tools and mainly git, Jenkins Strong understanding of OOP, SOLID, and ACID principles Knowledge and understanding of C4 model. Knowledge of cloud solutions (AWS or Azure) and Redis will be additional asset Soft skills Good interpersonal skills and flexibility Teamwork Time management Your responsibilities Back-end development in Java (60%) and Front-end development in Angular(40%)

🏢 Summary: Role focused on developing backend services in Java (60%) and frontend features in Angular (40%) within an enterprise environment. The position involves building secure REST APIs, integrating messaging systems, and working with relational databases using modern DevOps and containerization practices. 🗂️ Requirements: Proficiency in Java 11 or 17, Experience with Spring ecosystem, Experience with JPA, Hibernate, JDBC, Knowledge of JWT and OAuth2, Experience with RabbitMQ or Kafka, Experience with Angular 8+, Experience with REST APIs, Strong SQL skills (MS SQL preferred), Experience with Maven, Experience with JUnit, Experience with Docker and Kubernetes or OpenShift, Experience with Git and Jenkins, Understanding of OOP, SOLID, ACID principles, Knowledge of C4 model 📃 Skills: Java, Spring, Hibernate, JPA, JDBC, JWT, OAuth2, RabbitMQ, Kafka, Angular, npm, d3, REST, SQL, MSSQL, Maven, Eclipse, IntelliJ, JUnit, Docker, Kubernetes, OpenShift, Git, Jenkins, OOP, SOLID, ACID, C4 🏢 Description: Requirements description Knowledge of the Java language and its Enterprise features for Back End development, including technologies such as: Java 11, 17 Spring Ecosystem (Spring MVC, Spring Boot, Spring Batch, Spring Security, etc.) Database Access (JPA, Spring Data JPA, Hibernate, JDBC) Security protocols and technologies (JWT, Oauth2) Messaging systems (RabbitMQ, Kafka) UI Angular 8+, npm, d3 REST API Knowledge of database programming via SQL (MS SQL preferable), including SQL SQL analyzing tools, like Query Plan Knowledge of Build tools like Maven. An IDE like Eclipse or IntelliJ. Knowledge of Unit testing tools like JUnit and unit testing strategies. Knowledge container and orchestrator such as Docker, Kubernetes (and/or OpenShift) Knowledge of CI/CD tools and mainly git, Jenkins Strong understanding of OOP, SOLID, and ACID principles Knowledge and understanding of C4 model. Knowledge of cloud solutions (AWS or Azure) and Redis will be additional asset Soft skills Good interpersonal skills and flexibility Teamwork Time management Your responsibilities Back-end development in Java (60%) and Front-end development in Angular(40%)

🏢 Summary: Senior Backend Engineer role for a 3-month modernization project focused on upgrading Java and Scala backend services, migrating authentication systems to OAuth, and building large-scale Spark data pipelines. The position requires hybrid work in Warsaw or Kraków, with a fully covered onboarding period in Sweden. 🗂️ Requirements: 5+ years commercial backend experience, Strong production experience with Java, Strong production experience with Scala, Experience with Play Framework or Akka/Pekko, Hands-on experience with Spark, Experience with OAuth authentication, Professional English proficiency, Availability for 2-week onboarding in Sweden, Hybrid availability in Warsaw or Kraków office 3 days/week 📃 Skills: Java, Scala, Play, Akka, Pekko, Spark, OAuth, React, TypeScript, CI/CD, Gradle 🏢 Description: co.brick talents — powered by AI, powered by people. Senior Backend Engineer (Scala / Java) – 3-Month Project Salary: Up to 175 PLN/h net + VAT (B2B Contract) Location: Hybrid – Warsaw or Kraków ( strictly 3 days/week from the office – non-negotiable) Onboarding: 2 weeks on-site in Malmö, Sweden (fully covered) Project Duration: 3 months Start Date: ASAP/Beginning of August at the ABSOLUTE LATEST About the Client & Project On behalf of our client, an innovative company from the technology sector, we are looking for a Strong Senior Backend Developer to join a short-term, high-impact project. The main goal is to modernize and optimize core backend services, streamline data pipelines, and enhance system security. This is a highly autonomous role requiring a seasoned engineer who can jump straight into a complex ecosystem, utilize automation tools for framework upgrades, and handle heavy data migration tasks. Key Responsibilities Modernize and refactor backend services by upgrading legacy Java and Scala-based frameworks. Leverage automation and modern tooling to expedite code transformations, dependency resolution, and compatibility fixes. Migrate legacy authentication mechanisms across various services to secure, OAuth-based solutions. Consolidate multiple data stores into unified, versioned tables by designing and executing heavy Spark/Java batch pipelines. Requirements Minimum of 5 years of commercial backend experience (7+ years is highly preferred). Deep production experience with Java and Scala . Strong familiarity with Play Framework OR Akka (experience with Akka/Pekko is highly acceptable if you are ready to work with Play environments). Hands-on experience with Spark for complex, heavy data pipeline processing. Solid understanding and practical experience with OAuth authentication patterns. Excellent communication skills with Full Professional English (the project language is 100% English). Full availability for a 2-week onboarding trip to Sweden at the very start of the contract. Nice to Have Basic understanding or exposure to frontend technologies (React / TypeScript). DevOps mindset: familiarity with CI/CD pipelines, Gradle, and scripting. What We Offer A transparent, quick 2-stage recruitment process. An attractive hourly rate with seamless B2B invoicing. An opportunity to work on a high-exposure architectural modernization project for an international client.