Backend Developer

🏢 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: 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: 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.

🏢 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 heavy Spark-based data pipelines. The position requires hybrid work in Warsaw or Kraków with an initial onboarding in Sweden. 🗂️ Requirements: 5+ years commercial backend experience, Production experience with Java, Production experience with Scala, Experience with Play Framework or Akka/Pekko, Hands-on Spark experience, Experience with OAuth authentication, Professional English proficiency, Availability for 2-week onboarding in Sweden, Hybrid availability 3 days/week in Warsaw or Kraków office 📃 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.

🏢 Summary: Full Stack Engineer role in the banking sector focused on building and delivering high-quality solutions within a microservices architecture. The position involves hands-on backend development, REST API design, and collaboration within a global team while promoting engineering best practices. Long-term project with frequent production deployments and strong emphasis on scalable architecture. 🗂️ Requirements: Strong software engineering experience, Backend application design and development expertise, Experience with microservices architecture, Experience delivering changes to production frequently, Experience developing and deploying RESTful APIs, Experience writing schemas for PostgreSQL, Experience working with PostgreSQL databases, Fluent English for project communication 📃 Skills: Java, REST, PostgreSQL, Microservices, Docker, Kubernetes, GCP, ReactJS 🏢 Description: 🌍 Work mode: hybrid – 6 days per month in the Kraków office (days of your choice, including the option to attend all 6 days in a row). ⏰Start: ASAP/1 month. 📝Contract: B2B. ⚙️Recruitment process: 2 meetings; live coding, technical interview. ⏳Duration: >12 months contracts. 📕Project language: English. 💼Industry: Banking. 💻Workload: Full time. Summary: This full stack engineer role focuses on delivering high-quality code through a microservices architecture while promoting engineering best practices within the team. Main Responsibilities: Be hands-on, delivering code to production, supporting the architecture and design aligned to a microservice structure. Maintain awareness of business, engineering, and non-functional requirements to support company growth. Drive a positive engineering culture across teams. Collaborate with a global team across regional boundaries. Proactively remove impediments, address risks, and communicate issues to program management. Identify process inefficiencies and find innovative solutions to eliminate them. Key Requirements: Strong experience in software engineering with proven expertise in backend application design, development, and deployment. Experience with delivering code in a microservice architecture. Demonstrated ability to deliver changes to production frequently. Experience in developing and deploying RESTful APIs. Prior experience writing schemas for and working with PostgreSQL databases. Nice to Have: Experience with Java, preferably recent versions. Understanding of containerization and orchestration technologies like Docker/Kubernetes and GCP Cloud platform. Experience in developing UI applications using ReactJS. Previous experience in the financial sector, specifically banking. Other Details: Team Structure: Global team collaboration across regions. Project Context: Focus on microservices and engineering culture.

🏢 Summary: Full Stack Engineer role in the banking industry focused on building and delivering high-quality solutions within a microservices architecture. The position involves hands-on backend and API development, frequent production deployments, and collaboration with global teams to promote strong engineering practices. Hybrid work model with long-term B2B contract and technical recruitment process including live coding. 🗂️ Requirements: Strong experience in backend application design, development, and deployment, Experience delivering code in microservices architecture, Experience deploying changes to production frequently, Experience developing and deploying RESTful APIs, Experience writing schemas and working with PostgreSQL databases, Fluent English for project communication 📃 Skills: Java, REST, PostgreSQL, Docker, Kubernetes, GCP, ReactJS, Microservices 🏢 Description: 🌍 Work mode: hybrid – 6 days per month in the Kraków office (days of your choice, including the option to attend all 6 days in a row). ⏰Start: ASAP/1 month. 📝Contract: B2B. ⚙️Recruitment process: 2 meetings; live coding, technical interview. ⏳Duration: >12 months contracts. 📕Project language: English. 💼Industry: Banking. 💻Workload: Full time. Summary: This full stack engineer role focuses on delivering high-quality code through a microservices architecture while promoting engineering best practices within the team. Main Responsibilities: Be hands-on, delivering code to production, supporting the architecture and design aligned to a microservice structure. Maintain awareness of business, engineering, and non-functional requirements to support company growth. Drive a positive engineering culture across teams. Collaborate with a global team across regional boundaries. Proactively remove impediments, address risks, and communicate issues to program management. Identify process inefficiencies and find innovative solutions to eliminate them. Key Requirements: Strong experience in software engineering with proven expertise in backend application design, development, and deployment. Experience with delivering code in a microservice architecture. Demonstrated ability to deliver changes to production frequently. Experience in developing and deploying RESTful APIs. Prior experience writing schemas for and working with PostgreSQL databases. Nice to Have: Experience with Java, preferably recent versions. Understanding of containerization and orchestration technologies like Docker/Kubernetes and GCP Cloud platform. Experience in developing UI applications using ReactJS. Previous experience in the financial sector, specifically banking. Other Details: Team Structure: Global team collaboration across regions. Project Context: Focus on microservices and engineering culture.

🏢 Summary: Full Stack Engineer role in the banking sector focused on building and deploying high-quality solutions within a microservices architecture. The position involves hands-on backend development, frequent production releases, and collaboration within a global team. The contract is long-term B2B with a hybrid work model. 🗂️ Requirements: Strong software engineering experience, Backend application design and development expertise, Experience with microservices architecture, Experience delivering code to production frequently, Experience developing and deploying RESTful APIs, Experience with PostgreSQL and schema design, Fluent English for technical communication 📃 Skills: Java, REST, PostgreSQL, Microservices, Docker, Kubernetes, GCP, ReactJS 🏢 Description: 🌍 Work mode: hybrid – 6 days per month in the Kraków office (days of your choice, including the option to attend all 6 days in a row). ⏰Start: ASAP/1 month. 📝Contract: B2B. ⚙️Recruitment process: 2 meetings; live coding, technical interview. ⏳Duration: >12 months contracts. 📕Project language: English. 💼Industry: Banking. 💻Workload: Full time. Summary: This full stack engineer role focuses on delivering high-quality code through a microservices architecture while promoting engineering best practices within the team. Main Responsibilities: Be hands-on, delivering code to production, supporting the architecture and design aligned to a microservice structure. Maintain awareness of business, engineering, and non-functional requirements to support company growth. Drive a positive engineering culture across teams. Collaborate with a global team across regional boundaries. Proactively remove impediments, address risks, and communicate issues to program management. Identify process inefficiencies and find innovative solutions to eliminate them. Key Requirements: Strong experience in software engineering with proven expertise in backend application design, development, and deployment. Experience with delivering code in a microservice architecture. Demonstrated ability to deliver changes to production frequently. Experience in developing and deploying RESTful APIs. Prior experience writing schemas for and working with PostgreSQL databases. Nice to Have: Experience with Java, preferably recent versions. Understanding of containerization and orchestration technologies like Docker/Kubernetes and GCP Cloud platform. Experience in developing UI applications using ReactJS. Previous experience in the financial sector, specifically banking. Other Details: Team Structure: Global team collaboration across regions. Project Context: Focus on microservices and engineering culture.

🏢 Summary: Full Stack Engineer role focused on building and delivering high-quality backend solutions within a microservices architecture in the banking domain. The position involves hands-on development, frequent production deployments, and collaboration within a global team to support scalable systems. The engineer will design, develop, and maintain RESTful services and ensure alignment with engineering best practices. 🗂️ Requirements: Strong experience in backend application design, development, and deployment, Experience delivering solutions in microservices architecture, Experience developing and deploying RESTful APIs, Experience working with PostgreSQL databases and writing schemas, Ability to deliver changes to production frequently 📃 Skills: Microservices, REST, PostgreSQL, Backend, APIs, Deployment 🏢 Description: 🌍 Work mode: hybrid – 6 days per month in the Kraków office (days of your choice, including the option to attend all 6 days in a row). ⏰Start: ASAP/1 month. 📝Contract: B2B. ⚙️Recruitment process: 2 meetings; live coding, technical interview. ⏳Duration: >12 months contracts. 📕Project language: English. 💼Industry: Banking. 💻Workload: Full time. Summary: This full stack engineer role focuses on delivering high-quality code through a microservices architecture while promoting engineering best practices within the team. Main Responsibilities: Be hands-on, delivering code to production, supporting the architecture and design aligned to a microservice structure. Maintain awareness of business, engineering, and non-functional requirements to support company growth. Drive a positive engineering culture across teams. Collaborate with a global team across regional boundaries. Proactively remove impediments, address risks, and communicate issues to program management. Identify process inefficiencies and find innovative solutions to eliminate them. Key Requirements: Strong experience in software engineering with proven expertise in backend application design, development, and deployment. Experience with delivering code in a microservice architecture. Demonstrated ability to deliver changes to production frequently. Experience in developing and deploying RESTful APIs. Prior experience writing schemas for and working with PostgreSQL databases. Nice to Have: Experience with Java, preferably recent versions. Understanding of containerization and orchestration technologies like Docker/Kubernetes and GCP Cloud platform. Experience in developing UI applications using ReactJS. Previous experience in the financial sector, specifically banking. Other Details: Team Structure: Global team collaboration across regions. Project Context: Focus on microservices and engineering culture.

🏢 Summary: Backend Developer role focused on designing and building scalable, secure microservices and APIs using Java and Spring Boot in a cloud-oriented environment. The position emphasizes strong data modeling, architecture design, and CI/CD-driven delivery within Agile teams. The contractor will develop resilient backend solutions and ensure high code quality and reliability. 🗂️ Requirements: Hands-on experience with API and Microservices development in Java or Spring Boot, Proficiency in Java/J2EE application development, Experience with Spring Framework and Hibernate JPA, Experience building and consuming REST web services, Experience working with XML and JSON, Experience with relational or NoSQL databases (Oracle, PostgreSQL, MongoDB), Experience with CI/CD pipelines and Jenkins, Experience with Docker and Git, Unix proficiency, Experience working in Agile methodologies (Scrum or Kanban) 📃 Skills: Java, Spring, SpringBoot, J2EE, Hibernate, JPA, REST, XML, JSON, Oracle, PostgreSQL, MongoDB, Jenkins, Docker, Git, Unix, CICD, Microservices, Agile, Scrum, Kanban 🏢 Description: Location : Cracow Mode : Hybrid (6 days per month at the office - flexible) Contract : B2B Rate : 160-170 PLN/h Introduction & Summary We are seeking a skilled Backend Developer who possesses a deep knowledge of data modeling and architecture. The ideal candidate should have extensive experience in API development using core Java and Spring Boot, with a strong grasp of security principles and Agile methodologies. The role requires an analytical mindset, capable of designing resilient and scalable solutions while working cross-functionally to foster collaboration and innovation. Main Responsibilities Ensure proper definition and architecture of non-functional requirements in design. Develop and grow skills in designing cloud-based, secure, and adaptable solutions. Build scalable, highly reliable product features through effective software design and implementation. Apply problem-solving and analytical skills to diverse challenges. Interact with cross-functional teams for scalable solution production. Estimate engineering efforts and develop realistic schedules. Identify and resolve complex production issues efficiently. Conduct comprehensive design and code reviews and perform unit testing. Utilize source control and bug tracking systems responsibly. Key Requirements Hands-on experience in API and Microservices development using core Java and/or Spring Boot . Proficient in application development using Java/J2EE and related technologies, including Spring Framework and Hibernate JPA. Experience in developing reusable APIs and consuming web services (REST), as well as processing data formats like XML/JSON. Expert knowledge of Agile/Scrum/Kanban development methodologies and experience with databases (Oracle, Postgre, MongoDB). Extensive knowledge of CI/CD deployment pipelines, including Jenkins, Docker, shell scripting, and GIT with Unix proficiency. Nice to Have Experience in JavaScript frameworks such as ReactJs, Node JS, Angular, and jQuery. Familiarity with JavaScript build tools and dependency management. Experience in creating responsive designs using frameworks like Bootstrap. Knowledge of GCP, GKE, AWS is an advantage. Experience or knowledge in system architecture and solution design. Hands-on experience in Python, Machine Learning, and Data Science.