👉Java Developer

🏢 Summary: The role involves developing and maintaining high-performance backend systems for advertising and e-commerce platforms, focusing on scalable microservices and real-time data processing using Kotlin and Spring Boot. You will design low-latency services, contribute to system architecture, and support production environments in a high-scale setting. The position also emphasizes AI-assisted development practices and collaboration within engineering teams. 🗂️ Requirements: 3+ years of backend development experience, Very good knowledge of Kotlin, Very good knowledge of Spring Boot, Hands-on experience with microservices architecture, Experience with NoSQL databases, Experience with MongoDB, Experience building and maintaining backend systems and APIs, Understanding of system design and scalable architecture, Experience with high-performance and high-scale systems, English B2 level, Polish C1 level, Work permit in the European Union, Openness to occasional visits to Warsaw office, Experience using AI-powered coding assistants 📃 Skills: Kotlin, SpringBoot, MongoDB, NoSQL, Microservices, REST, APIs, GenAI, Claude, GitHubCopilot, Cursor, AWS, Azure 🏢 Description: 🟣 You will be: developing and maintaining backend systems for advertising and e-commerce platforms, building low-latency, high-performance services processing large volumes of data, developing scalable microservices and APIs using Kotlin and Spring Boot, working on real-time event processing and advertising targeting mechanisms, contributing to architecture design and system scalability improvements, collaborating with stakeholders and supporting engineering best practices, including code reviews and code quality standards, participating in technical readiness/on-call support for production incidents a few days per month. 🟣 Your profile: 3+ years of professional experience in backend development, very good knowledge of Kotlin and Spring Boot, openness to occasional visits to the Warsaw office (1–2 days per quarter), hands-on experience with microservices architecture, practical experience working with NoSQL databases, especially MongoDB, experience building and maintaining backend systems and APIs, understanding of system design and scalable architecture principles, experience working with high-performance and high-scale systems, strong analytical thinking and problem-solving skills, ability to collaborate effectively with stakeholders and engineering teams, good communication skills in English (B2) and Polish (C1), practical experience using AI-powered assistants (e.g. Claude Code, GitHub Copilot, Cursor) to improve productivity, quality, or decision-making in software delivery. Work from the European Union region and a work permit are required. 🟣 Nice to have: experience applying GenAI in a more structured way within the SDLC, including defined workflows, prompt patterns, or tool integrations embedded into daily work, interest in and familiarity with emerging AI-driven practices (e.g. agent-based workflows, automation patterns, AI-augmented development), with a willingness to explore and experiment beyond standard approaches. 🟣 Recruitment Process: CV review – HR call – Technical Interview – Client Interview – Decision 🎁 Benefits 🎁 ✍ Development: development budgets of up to 6,800 PLN, we fund certifications e.g.: AWS, Azure, access to Udemy, O'Reilly (formerly Safari Books Online) and more, events and technology conferences, technology Guilds, internal training, Xebia Upskill. 🩺 We take care of your health: private medical healthcare, multiSport card - we subsidise a MultiSport card, mental Health Support. 🤸‍♂️ We are flexible: B2B or employment contract, contract for an indefinite period.

🏢 Summary: Backend Java Developer role focused on building and maintaining high-performance, scalable systems for transaction, payment, and cashier functionalities within a complex trading platform. The position involves developing RESTful and RPC APIs, handling high-concurrency and large-scale data processing in distributed environments, and integrating with third-party services. The role requires strong production troubleshooting skills and collaboration within cross-functional teams. 🗂️ Requirements: 5+ years of Java backend development experience, Strong experience with Java 8+, Strong experience with Spring Boot, Experience in fintech product development, Experience with B2B systems, Hands-on experience with high-concurrency and multi-threaded environments, Experience with high-volume traffic systems, Experience with large-scale data processing, Knowledge of MyBatis, Redis, and message queues, Experience with MySQL and complex query optimization, Experience with Elasticsearch, Experience with Hadoop or big data technologies, Experience with event-driven architectures, Experience with unit and integration testing, Experience integrating third-party APIs, Understanding of distributed systems and microservices, EU work permit and EU-based work availability 📃 Skills: Java, Spring, SpringBoot, MyBatis, Redis, MySQL, Elasticsearch, Hadoop, Dubbo, REST, RPC, SQL, Multithreading, Microservices, Kafka, RabbitMQ 🏢 Description: 🟣 You will be: designing, developing, and maintaining high-performance backend systems using Java and Spring Boot, working on transaction, payment, and cashier-related functionalities within a complex trading platform, building and maintaining RESTful and RPC APIs (e.g. using Apache Dubbo), developing solutions capable of handling high-volume traffic, high concurrency, and multi-threaded environments, processing and optimizing large volumes of data within distributed systems, collaborating with cross-functional teams to deliver scalable and reliable systems, integrating backend services with third-party applications and external systems, troubleshooting, debugging, and optimizing system performance in production environments. 🟣 Your profile: 5+ years of professional experience in Java backend development, strong experience with Java (8+) and Spring Boot, experience in business product development within fintech environments, experience working on B2B products, hands-on experience with high-concurrency systems, multi-threading, and high-volume traffic environments, proven experience working with large-scale data processing systems, solid knowledge of technologies such as MyBatis, Redis, and message queue systems, experience working with relational databases such as MySQL, including writing complex queries and performance tuning, experience working with Elasticsearch and big data technologies such as Hadoop, experience with messaging systems (queues) and event-driven architectures, experience with unit and integration testing, experience integrating with third-party services and APIs, strong debugging and problem-solving skills, solid understanding of software design patterns and backend architectures, practical experience using AI-powered assistants (e.g. Claude Code, GitHub Copilot, Cursor) to improve productivity, quality, or decision-making in software delivery, good communication skills and ability to work in a team environment, immediate availability or a short notice period is preferred. Work from the European Union region and a work permit are required. 🟣 Nice to have: familiarity with RPC frameworks such as Apache Dubbo, experience working with systems serving large-scale user bases, understanding of distributed systems and microservices architecture, experience applying GenAI in a more structured way within the SDLC, including defined workflows, prompt patterns, or tool integrations embedded into daily work, interest in and familiarity with emerging AI-driven practices (e.g. agent-based workflows, automation patterns, AI-augmented development), with a willingness to explore and experiment beyond standard approaches. 🟣 Recruitment Process: CV review – HR call – Technical Interview – Client Interview – Decision 🎁 Benefits 🎁 ✍ Development: development budgets of up to 6,800 PLN, we fund certifications e.g.: AWS, Azure, access to Udemy, O'Reilly (formerly Safari Books Online) and more, events and technology conferences, technology Guilds, internal training, Xebia Upskill. 🩺 We take care of your health: private medical healthcare, multiSport card - we subsidise a MultiSport card, mental Health Support. 🤸‍♂️ We are flexible: B2B or employment contract, contract for an indefinite period.

🏢 Summary: Senior Fullstack Engineer role focused on building intelligent advertising systems using React and Kotlin, including ML-driven recommendation engines and automated campaign management tools. The position involves developing scalable, event-driven cloud architectures and high-performance APIs for analytical platforms within a GCP environment. Hybrid work model in Warsaw with strong emphasis on modern microservices and microfrontend architectures. 🗂️ Requirements: Minimum 3 years of full-stack development experience, Strong experience with React and Kotlin, Proficiency in TypeScript, HTML, CSS, Experience with Spring Boot and microservices architecture, Experience with GCP cloud environment, Experience with MongoDB and SQL databases, Understanding of event-driven architectures and large-scale data processing, Experience with testing frameworks such as Jest, Vitest, or Playwright, Communicative Polish and English, Legal right to work in the European Union 📃 Skills: Kotlin, React, TypeScript, HTML, CSS, SpringBoot, MongoDB, SQL, GCP, Microservices, Microfrontends, Jest, Vitest, Playwright, APIs, SSR, Accessibility, EventDriven 🏢 Description: Unleash innovation — design the future of intelligent advertising ecosystems! Warszawa-based opportunity with hybrid work model. As a Senior Fullstack Engineer – React and Kotlin Specialists , you will be working for our client, a leader in building advanced advertising tools, focusing on creating intelligent recommendation systems and automating campaign management for advertisers on Allegro Ads. Join a mission-driven project that revolutionizes how businesses grow through cutting-edge technology and data-driven insights, offering exciting avenues for professional growth and innovation. Your main responsibilities: Develop and maintain backend services using Kotlin, integrating machine learning-driven recommendation engines in collaboration with data science teams. Build scalable, event-driven architectures to process large data volumes within cloud environments, leveraging GCP. Design and implement high-performance APIs to support analytical dashboards and market benchmarks. Create and optimize scalable microfrontends using React, prioritizing accessibility and server-side rendering for analytical tools. Collaborate with cross-functional teams to deliver seamless, secure, and efficient software solutions. Ensure high code quality through testing frameworks such as Jest, Vitest, or Playwright, with a focus on performance and reliability. Contribute to evolving microservice architectures, utilizing Spring Boot, MongoDB, SQL, and cloud-native tools. Participate actively in code reviews, sprint planning, and technical discussions to foster continuous improvement. You're ideal for this role if you have: At least 3 years of experience in full-stack development, with a focus on React and Kotlin. Strong proficiency in TypeScript, React, HTML/CSS, and backend technologies like Kotlin, Spring Boot, and microservices. Experience working with cloud ecosystems, preferably GCP. Solid understanding of database management, including MongoDB and SQL. Familiarity with event-driven architectures and large-scale data processing. Ability to communicate effectively in Polish and English. Experience working in an Agile environment with a focus on delivering high-quality software. It is a strong plus if you have: (optional) Certifications related to GCP or microservices architecture. Experience with agentic coding tools like Copilot/OpenCode. Knowledge of accessibility standards (a11y) and performance optimization techniques. Language Required for the role: Polish (Communicative) English (Communicative) Eligibility for this role: Only candidates with an existing legal right to work in the European Union will be considered for this role. #MAKEYourCareerBETTER Interested? Apply now and include your CV (preferably in English) along with a statement confirming your consent to the processing and storage of your personal data.

🏢 Summary: Backend Developer role focused on designing, building, and maintaining scalable Java and Kotlin-based applications and microservices within an international team. The position involves developing high-quality backend systems, collaborating with cross-functional teams, and optimizing distributed systems performance. The role emphasizes clean code, modern frameworks, and agile delivery practices. 🗂️ Requirements: 5+ years of backend development experience with Java 8+ and Kotlin, Strong knowledge of Spring Framework and Spring Boot, Experience building RESTful APIs and microservices, Experience with SQL and NoSQL databases, Understanding of Agile/Scrum methodologies 📃 Skills: Java, Kotlin, Spring, SpringBoot, REST, Microservices, SQL, NoSQL, PostgreSQL, MongoDB, Agile, Scrum 🏢 Description: We are looking for skilled Java & Kotlin Developers to join our growing technology team in Poland. As part of an international development group, you’ll design, build, and maintain scalable backend systems using Java and modern frameworks. You’ll collaborate closely with cross-functional teams to deliver high-quality, reliable, and efficient software solutions. Key Responsibilities Design, develop, and maintain Java-based applications and microservices. Write clean, efficient, and testable code following best practices and coding standards. Collaborate with front-end developers , DevOps engineers , and QA teams to ensure seamless integration and delivery. Participate in code reviews , architecture discussions, and agile ceremonies. Contribute to technical documentation and continuous improvement of development processes. Troubleshoot and optimize performance across distributed systems. Requirements 5+ years of experience in backend development using Java 8+ Kotlin . Strong understanding of Spring Framework / Spring Boot . Experience with RESTful APIs , microservices , and SQL / NoSQL databases (e.g., PostgreSQL, MongoDB). Knowledge of Agile / Scrum methodologies. Good command of English (B2 or higher) – Polish language skills are a plus. Nice to Have Experience with cloud platforms (AWS, Azure, or GCP). Familiarity with message brokers (Kafka, RabbitMQ). Knowledge of unit testing and test automation frameworks (JUnit, Mockito). Interest in DevOps or system design concepts. How to Apply If you’re passionate about building high-quality Java applications and want to be part of a dynamic engineering team, send your CV

🏢 Summary: The offer is for a DevOps Engineer responsible for building and supporting tools, processes, and infrastructure that enable fast, reliable, and scalable software delivery. The role focuses on CI/CD, cloud infrastructure, container orchestration, observability, and integrating AI-powered tools into the software development lifecycle. It involves ensuring high availability, automation, and operational insight across AWS-based environments. 🗂️ Requirements: 3+ years of experience with DevOps practices and Continuous Delivery, Practical experience with AI-powered development assistants, Hands-on experience with AWS services and networking, Experience with Kubernetes and container orchestration, Knowledge of Python, Experience with GitOps practices, Experience with CI/CD pipelines and tooling, Experience with monitoring, logging, and observability tools, Knowledge of Terraform and Helm, Proficiency in Bash and PowerShell scripting, Knowledge of API management tools, Security awareness (OWASP, encryption, secrets management), Upper intermediate/advanced English (B2/C1), Work permit and residence in the EU 📃 Skills: AWS, Kubernetes, EKS, Python, GitOps, ArgoCD, Terraform, Helm, Bash, PowerShell, GitLab, GitHub, CI/CD, Prometheus, Grafana, AppDynamics, OpenSearch, Apigee, Tyk, Kiro, OWASP, Encryption 🏢 Description: 🟣 You will be: building and supporting the tools, processes and infrastructure empowering the faster delivery and scaling of software iterations (ideally with greater quality and the necessary operational insight), ensuring availability, reliability and scalability of application infrastructure, building and supporting continuous integration/delivery and release tools, ensuring the right metrics are collected and monitored. 🟣 Your profile: mart and tech-savvy engineer with 3+ years of experience working with DevOps practices and Continuous Delivery, practical experience using AI-powered assistants (e.g. Claude Code, GitHub Copilot, Cursor) to improve productivity, quality, or decision-making in software delivery, practical knowledge of AWS services, infrastructure and networking, working experience with Kiro, practical knowledge of Tyk, proficiency in Google Cloud Apigee, experience with Kubernetes (ideally EKS on AWS) and container orchestration, Python knowledge, hands-on with GitOps practices, preferably with ArgoCD, medium skills in Terraform and Helm, proficiency in Bash and PowerShell scripting, experience with CI/CD pipelines and tooling (GitLab CI/CD, GitHub Actions, or similar), experience with monitoring, observability, and logging tools, such as Prometheus, Grafana, AppDynamics, and OpenSearch, security awareness (OWASP, encryption, secrets management), very communicative and collaborative, with a strong sense of ownership, upper intermediate/advanced English (B2/C1). Work from the European Union region and a work permit are required. 🟣 Nice to have: Experience applying GenAI in a more structured way within the SDLC, including defined workflows, prompt patterns, or tool integrations embedded into daily work. Interest in and familiarity with emerging AI-driven practices (e.g. agent-based workflows, automation patterns, AI-augmented development), with a willingness to explore and experiment beyond standard approaches. 🟣 Recruitment Process: CV review – HR Interview – Technical Interview - Client Interview – Decision 🎁 Benefits 🎁 ✍ Development: development budgets of up to 6,800 PLN, we fund certifications e.g.: AWS, Azure, access to Udemy, O'Reilly (formerly Safari Books Online) and more, events and technology conferences, technology Guilds, internal training, Xebia Upskill. 🩺 We take care of your health: private medical healthcare, MultiSport card - we subsidise a MultiSport card, mental Health Support.

🏢 Summary: Senior Magento 2 / Adobe Commerce Backend Developer role focused on building and maintaining scalable e-commerce solutions. The position involves developing custom modules, integrating external services, optimizing performance, and ensuring high code quality in an agile environment. The role also includes working with APIs, message queues, and cloud-based infrastructure to support reliable commerce platforms. 🗂️ Requirements: 7+ years commercial experience with Magento 2 / Adobe Commerce backend, Strong knowledge of Magento architecture, modules, and customization, Proficiency in PHP (OOP, MVC), Strong knowledge of MySQL, Hands-on experience with REST and GraphQL APIs, Experience with message queues (RabbitMQ), Experience integrating payment gateways and logistics systems, Experience with Elasticsearch, Familiarity with monitoring tools, Knowledge of DevOps practices and Adobe Cloud, Ability to perform code reviews and ensure code quality, Experience working in Agile environment, Very good English (min. B2), Work authorization in the EU 📃 Skills: Magento, AdobeCommerce, PHP, MySQL, REST, GraphQL, RabbitMQ, Elasticsearch, NewRelic, Datadog, SumoLogic, CloudFront, Cloudflare, DevOps, AdobeCloud, AI, Claude, Copilot, Cursor 🏢 Description: 🟣 You will be: developing and maintaining backend solutions based on Magento 2 / Adobe Commerce, designing and implementing custom modules, integrations, and platform enhancements, working with APIs (REST, GraphQL) and integrating external services (payments, logistics, booking systems), ensuring high code quality through code reviews and best engineering practices, collaborating with cross-functional teams in an agile environment, supporting performance optimization, monitoring, and reliability of e-commerce platforms. 🟣 Your profile: 7+ years of commercial experience with Magento 2 / Adobe Commerce backend development, very good understanding of Magento architecture, modules, and customization best practices, solid knowledge of PHP (OOP, MVC) and MySQL, hands-on experience with Magento APIs (REST, GraphQL) and message queues (e.g. RabbitMQ), experience integrating external services such as payment gateways and logistics systems, familiarity with Elasticsearch and monitoring tools (e.g. New Relic, Datadog, Sumo Logic), experience working with CDN services (e.g. CloudFront, Cloudflare), understanding of Agile methodologies, competence in performing code reviews (PRs) with a strong focus on code quality and best practices, along with good knowledge of DevOps and Adobe cloud management, practical experience using AI-powered assistants (e.g. Claude Code, GitHub Copilot, Cursor) to improve productivity, quality, or decision-making in software delivery, strong communication skills and ability to work in a collaborative environment, very good command of English (min. B2), availability to start as soon as possible (or within a short notice period). Work from the European Union region and a work permit are required. 🟣 Nice to have: familiarity with CI/CD pipelines (e.g. GitHub, CircleCI) and external booking systems, knowledge of analytics tools (e.g. Google Analytics, Google Tag Manager) and A/B testing solutions, experience with consent management tools (e.g. OneTrust), expertise in performance optimization and scalable e-commerce solutions, experience with React, Knockout.js, jQuery, familiarity with tools such as Vertex AI, CAPTCHA solutions, or review platforms (e.g. Trustpilot), experience working with multi-vendor e-commerce setups or marketing tools (e.g. Klaviyo), experience applying GenAI in a more structured way within the SDLC, including defined workflows, prompt patterns, or tool integrations embedded into daily work, interest in and familiarity with emerging AI-driven practices (e.g. agent-based workflows, automation patterns, AI-augmented development), with a willingness to explore and experiment beyond standard approaches. 🟣 Recruitment Process: CV review – HR call – Technical Interview – Client Interview – Decision 🎁 Benefits 🎁 ✍ Development: development budgets of up to 6,800 PLN, we fund certifications e.g.: AWS, Azure, access to Udemy, O'Reilly (formerly Safari Books Online) and more, events and technology conferences, technology Guilds, internal training, Xebia Upskill. 🩺 We take care of your health: private medical healthcare, multiSport card - we subsidise a MultiSport card, mental Health Support.

🏢 Summary: Backend Engineer role in the Advertising team focused on building and operating high-scale, cloud-native systems and end-to-end ML infrastructure for a real-time marketplace. The position involves developing microservices, data pipelines, and advertising systems using Kotlin/Scala, Spring, Kafka, and big data technologies. You will own services end-to-end in a high-availability environment handling massive traffic and complex distributed challenges. 🗂️ Requirements: Proficiency in Kotlin or Scala, Experience with Spring Boot, Experience with Kafka, Hands-on experience with Apache Airflow, Hands-on experience with Apache Spark, Proficiency in PostgreSQL, Experience with database migrations, Experience designing and integrating APIs, English level B2 or higher 📃 Skills: Kotlin, Scala, Spring, SpringBoot, Kafka, Airflow, Spark, PostgreSQL, BigQuery, Kubernetes, Docker, Consul, GitHub, GitHubActions, React, TypeScript 🏢 Description: About the job Massive Scale : Design, build, and optimize systems that handle thousands of requests per minute. This is high-availability, high-performance engineering in practice. Modern Tech Stack : Work with a world-class, cloud-native environment. Our core technologies include Kotlin, Spring, Kafka, and Kubernetes. We're not shy when it comes to ML too :) True Ownership & Autonomy : We live by a "you build it, you run it" philosophy. You'll join an agile, autonomous team with full ownership of your microservices, from design to deployment. Complex Challenges : From distributed systems and data streaming to algorithmic optimization, you'll tackle the complex backend problems that power a massive, real-time marketplace. End-to-End ML Systems: Bridge the gap between big data and real-time product impact. You’ll build the infrastructure using BigQuery and Apache Spark for offline data processing. You’ll integrate these components with our microservices architecture to create the sophisticated advertising system that powers a personalized user experience. Join the Advertising team! You will have a chance to build Allegro Ads - one of the most visible products on the platform. Your team works closely with the Machine Learning team, creating the best experience for customers. High performance, engineering best practices and great atmosphere in the team guaranteed! Important things for you Flexible working hours in the hybrid model (4/1) - working hours start between 7:00 a.m. and 10:00 a.m. We also have 30 days of occasional remote work. The salary range for this position depending on the skill set is as follows (contract of employment, tax-deductible cost): PLN 18 850 - 25 900 Annual bonus based on your annual performance and company results. Our team is based in Warsaw. We are looking for people who: Code in Kotlin or Scala and have experience with Spring Boot and Kafka to build robust backend systems; Have hands-on experience with Apache Airflow and Spark , enabling them to manage high-velocity data pipelines and build scalable reporting engines; Are proficient in PostgreSQL and have experience with database migrations and designing integrations via APIs; Enjoy close collaboration with Data Scientists and Analysts, working together to implement complex models and turn raw data into actionable insights; Are enthusiastic about AI and want to stay at the forefront of technical innovation; Want to build impactful tools for a diverse range of users, helping them understand campaign performance through advanced statistics and dashboards; Experience with frontend technologies (React/TypeScript) is a “Nice to have” to help build modern frontend reporting components; Are excited to join a growing team where they can influence the technical vision and help shape new projects from the ground up within the ecosystem; Know English at at least B2 level. What's in it for you: Well-located offices (with e.g. fully equipped kitchens, bicycle parking, terraces full of greenery) and excellent work tools (e.g., raised desks, ergonomic chairs, interactive conference rooms). A 16" or 14" MacBook Pro or corresponding Dell with Windows (if you don't like Macs) and all the necessary accessories. A wide selection of fringe benefits in a cafeteria plan - you choose what you like (e.g., medical, sports or lunch packages, insurance, purchase vouchers). English classes that we pay for related to the specific nature of your job. A training budget, inter-team tourism ( see more here ), hackathons, and an internal learning platform where you will find multiple trainings. An additional day off for volunteering, which you can use alone, with a team, or with a larger group of people connected by a common goal. Social events for Allegro people - Spin Kilometers, Family Day, Fat Thursday, Advent of Code, and many other occasions we enjoy. And that's just the beginning! You can read more about the benefits here . #goodtobehere means that: You will join a team you can count on - we work with top-class specialists who have knowledge- and experience-sharing in their DNA. You will love our level of autonomy in team organization, the space for continuous development, and the opportunity to try new things. You get to choose which technology solves the problem and you are responsible for what you create. You will value our Developer Experience and the full platform of tools and technologies that make creating software easier. We rely on an internal ecosystem based on self-service and widely used tools such as Kubernetes, Docker, Consul, GitHub, and GitHub Actions. Thanks to this, you can contribute to Allegro from your very first days on the job. You will be equipped with modern AI tools to automate repetitive tasks, allowing you to focus on developing new services and refining existing ones (also leveraging AI support). You will create solutions that will be used (and loved!) by your friends, family and millions of our customers. You will meet the Allegro Scale , which starts with over 1000 microservices, an open-source data bus (Hermes) with 300K+ rps, a Service Mesh with 1M+ rps, tens of petabytes of data, and production-used machine learning. You will become part of Allegro Tech - We speak at industry conferences, cooperate with tech communities, run our own blog (it's been over 10 years!), record podcasts, lead guilds, and we organize our own internal conference - the Allegro Tech Meeting. We create solutions we love (and can) to talk about! Send us your CV and… see you at Allegro!

🏢 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: Mid-Level Kotlin/Java Developer role focused on building and enhancing a microservices-based Developer Experience platform in the fintech domain. The position involves designing and implementing web applications and APIs, improving compliance and automation through scalable cloud-integrated solutions. The role follows a hybrid model in Krakow and emphasizes Agile delivery and high-quality code practices. 🗂️ Requirements: 3+ years experience with Java or Kotlin, Experience in API development, Experience with SQL databases, Knowledge of HTML, Knowledge of JavaScript, Understanding of microservices architecture, Experience working in Agile environments, Experience with Jira and Confluence, Strong troubleshooting skills, English B2+ level, Legal right to work in the EU 📃 Skills: Java, Kotlin, SQL, HTML, JavaScript, Microservices, APIs, Agile, Jira, Confluence, CICD, Jenkins, AWS, Azure, GCP, Linux, AIX, WAS, Testing, TestAutomation 🏢 Description: Unleash innovation through code — drive the next evolution of microservices and cloud integration! Krakow-based opportunity with hybrid work model As a Mid-Level Kotlin/Java Developer , you will be working for our client, a leading player in the financial technology industry, focused on building a cutting-edge Developer Experience platform. You will help develop a robust microservice architecture to enhance compliance and streamline development processes, shaping the future of software control and automation. Join us and be part of a transformative journey that fosters innovation and career growth. Your main responsibilities: Collaborate with cross-functional teams to design, develop, and implement web applications and APIs using Kotlin and Java. Build and maintain microservices that address critical business challenges and improve developer experience. Work closely with testers and other developers to ensure high-quality, efficient code delivery. Proactively engage with customers and internal stakeholders to resolve issues and incorporate feature requests. Participate in Agile practices, including peer reviews, automated testing, and continuous integration/deployment workflows. You're ideal for this role if you have: 3+ years of experience in Java, Kotlin, or related development fields. Strong expertise in API development, databases (SQL), and front-end technologies such as HTML/Javascript. Solid troubleshooting skills and experience working within Agile environments using Jira/Confluence. Good understanding of microservice architecture. Excellent communication skills in English (B2+). It is a strong plus if you have: (optional) Cloud technology experience (AWS, Azure, GCP). Knowledge of CI/CD toolchains like Jenkins. Background in Systems Administration across Linux/AIX/WAS platforms. Test Automation skills. Language Required for the role: English (B2+ level) Eligibility for the role: Only candidates with an existing legal right to work in the European Union will be considered for this role. #MAKEYourCareerBETTER Interested? Apply now and include your CV (preferably in English) along with a statement confirming your consent to the processing and storage of your personal data.

🏢 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.