Regular Java Developer

🏢 Summary: B2B role for an experienced Java Developer to design and develop high-availability, horizontally scalable microservices supporting an advertising and billing platform. The position involves working on production systems with real impact on architecture, distributed communication, and system performance. Collaboration with cross-functional teams and Polish-speaking stakeholders is required. 🗂️ Requirements: Minimum 4 years commercial experience as Java Developer, Hands-on experience in production environments, Higher education in relevant field (completed or in progress), Professional proficiency in Polish (spoken and written), Strong knowledge of Java 11+, Practical experience with Spring Boot, Experience with microservices architecture in production, Experience with Kafka or RabbitMQ, Understanding of distributed systems, Advanced knowledge of SQL without ORM usage, Experience with monitoring, logging and metrics, Understanding of asynchronous communication, Familiarity with reactive programming 📃 Skills: Java, Spring, SpringBoot, SQL, NoSQL, Kafka, RabbitMQ, WebFlux, Reactor, Microservices, Kotlin, Hibernate, JPA, Monitoring, Logging 🏢 Description: Salary: 750 - 1000 PLN/MD on B2B Work model: elastic hybrid from Gdynia/Warszawa/Rzeszów/Kraków Why choose this offer? Real impact on system architecture Opportunity to design solutions with high availability and horizontal scalability Collaboration within a mature, cross-functional team Direct communication with Product Owners and non-technical stakeholders Project The team is directly involved in managing advertising campaigns. This enables sellers and advertising agencies to create ads, which are then delivered for airing on the company's portal (e.g., sponsored listings, homepage) and on other platforms such as Google. Additionally, the team is responsible for budgeting and advertising billing. They collaborate closely with teams handling the airing of various types of ads, frontend development, and offers visible on the portal. The project is conducted primarily in Polish, therefore professional working proficiency in Polish (spoken and written) is required. Expected competences and knowledge Minimum 4 years of commercial experience as a Java Developer, with mandatory hands-on experience in production environments Required higher education in a relevant field (or currently in progress) Fluent or professional working proficiency in Polish (spoken and written) Good knowledge of Java 11+ (Kotlin is a plus) First hands-on experience with Spring Boot Practical experience with microservices architecture in production environments Familiarity with messaging systems such as Kafka or RabbitMQ Basic understanding of distributed systems and asynchronous communication Solid understanding of relational databases ( SQL ), including indexes, constraints, and transactions (without relying on ORM frameworks such as Hibernate/JPA) Experience working with monitoring, logging, and application metrics Ability to work in a cross-functional team environment Familiarity with reactive programming concepts Technologies you'll work with Java 11+ Spring Boot NoSQL databases Spring WebFlux / Project Reactor Relational databases (advanced SQL) Nice to have: Kafka Kotlin Event-driven architecture Client – why choose this particular client from the Jit portfolio? Our Client dominates the Polish e-commerce arena as the market leader since 1999 . With a user base of over 20 million and growing, this well-established platform is at the forefront of e-commerce, constantly striving for growth through market expansion and investment. As a major player in technology, our Client boasts a talented IT team of over 1,000 employees who focus on developing their own cutting-edge technologies. Jit Team has had a successful partnership with our Client since spring 2021 , with multiple software development teams dedicated to our Client's platforms. These teams operate autonomously, designing platform components through micro-services. Working with our Client offers a chance to contribute to a solution used by millions on a daily basis and to tackle the challenge of delivering software at a massive scale , where even a single second of delay can have a significant impact. This project provides a unique opportunity to work with state-of-the-art technologies and tools, making it a rare and valuable experience. About Jit Team The Human factor of IT - it's not just a slogan, it's a philosophy. The foundation of Jit Team is people, which is why we prioritise you. We employ over 700 experienced experts . We create highly specialised teams for clients from all over the world. We offer team members developmental projects, a wide range of benefits and a proprietary professional development programme. Behind our maxim are also charitable and educational activities. We support pupils and students by donating learning equipment. We offer internships to help launch careers in IT. We support water rescuers and hospitals by providing the necessary equipment. We are a Polish company and we share what we have achieved over 15 years of activity . By supporting indigenous initiatives, we ensure the circulation of good energy.

🏢 Summary: Oferta dotyczy pracy zdalnej dla doświadczonego Backend Developera rozwijającego skalowalne aplikacje i mikroserwisy w Java i Kotlin w środowisku Google Cloud Platform. Projekt obejmuje wykorzystanie Generative AI i modeli LLM w rzeczywistych zastosowaniach biznesowych oraz wpływ na architekturę i decyzje technologiczne. Praca realizowana jest dla dużej platformy e-commerce obsługującej miliony użytkowników. 🗂️ Requirements: Minimum 5 lat doświadczenia w programowaniu backendowym, Bardzo dobra znajomość Java, Gotowość do pracy z Kotlin, Doświadczenie ze Spring Boot, Doświadczenie z architekturą mikroserwisową, Praktyczna znajomość Google Cloud Platform, Znajomość Docker, Znajomość Kubernetes, Doświadczenie z komunikacją asynchroniczną, Znajomość relacyjnych lub NoSQL baz danych, Znajomość Clean Code, Znajomość SOLID, Znajomość DDD, Znajomość REST, Doświadczenie z CI/CD, Znajomość Git, Komercyjne doświadczenie z AI/LLM, Znajomość platform lub frameworków AI, Umiejętność projektowania aplikacji wykorzystujących LLM, RAG, embeddingi lub agentów AI 📃 Skills: Java, Kotlin, Spring, SpringBoot, GCP, CloudRun, GKE, PubSub, CloudStorage, BigQuery, Docker, Kubernetes, Kafka, CI/CD, Git, VertexAI, OpenAI, LangChain, SpringAI, Gemini, LLM, RAG, Embeddingi, GenerativeAI, REST, DDD, SQL, NoSQL 🏢 Description: Wynagrodzenie: 1000-1280 PLN netto/ dziennie Miejsce i model pracy: Praca zdalna z terenu Polski z okazjonalnymi wizytami w biurze w Poznaniu/Warszawie (średnio raz w miesiącu) Dlaczego warto wybrać tę ofertę? Będziesz rozwijać rozwiązania backendowe wykorzystywane przez miliony użytkowników każdego dnia. Zyskasz możliwość pracy z nowoczesnym stackiem technologicznym obejmującym Java, Kotlin oraz Google Cloud Platform. Weźmiesz udział w projektach wykorzystujących Generative AI i modele LLM w rzeczywistych zastosowaniach biznesowych. Będziesz mieć realny wpływ na architekturę, decyzje technologiczne oraz rozwój skalowalnych systemów opartych o mikroserwisy. Projekt Projekt obejmuje projektowanie i rozwój skalowalnych aplikacji backendowych w Java i Kotlin oraz budowę mikroserwisów działających w środowisku Google Cloud Platform. Zespół koncentruje się na tworzeniu rozwiązań o wysokiej dostępności , wydajności i niezawodności, wykorzystując nowoczesne technologie chmurowe oraz rozwiązania oparte o Generative AI i modele LLM. Zakres obowiązków Projektowanie i rozwój skalowalnych aplikacji backendowych w Java i Kotlin Budowa oraz rozwój mikroserwisów działających w środowisku Google Cloud Platform Projektowanie rozwiązań z naciskiem na wysoką dostępność, wydajność i niezawodność Tworzenie oraz rozwój API i integracji pomiędzy systemami Współpraca z Product Managerami, Architektami, Data Engineerami oraz zespołami AI Wykorzystywanie rozwiązań opartych o Generative AI oraz LLM w produktach lub procesach biznesowych Optymalizacja wydajności aplikacji oraz monitorowanie środowisk produkcyjnych Udział w code review, projektowaniu architektury oraz podejmowaniu decyzji technologicznych Wspieranie mniej doświadczonych programistów oraz aktywne dzielenie się wiedzą Oczekiwane kompetencje i doświadczenie Minimum 5 lat doświadczenia w programowaniu backendowym Bardzo dobra znajomość Java oraz otwartość na praće z Kotlin Doświadczenie z Spring Boot oraz budową aplikacji opartych o architekturę mikroserwisową Praktyczna znajomość Google Cloud Platform (Cloud Run, GKE, Pub/Sub, Cloud Storage, BigQuery lub pokrewne usługi) Znajomość Dockera oraz Kubernetes Doświadczenie z komunikacją asynchroniczną (Kafka lub Pub/Sub) Dobra znajomość relacyjnych i/lub NoSQL baz danych Znajomość dobrych praktyk projektowych (Clean Code, SOLID, DDD, REST) Doświadczenie z CI/CD oraz Git Komercyjne doświadczenie w wykorzystaniu rozwiązań AI/LLM w projektach produkcyjnych Praktyczna znajomość przynajmniej jednej platformy lub frameworka AI (np. Vertex AI, OpenAI API, LangChain, Spring AI, Gemini lub podobnych) Umiejętność projektowania aplikacji wykorzystujących modele językowe, RAG, embeddingi, prompt engineering lub agentów AI Mile widziane Doświadczenie w projektach z obszaru e-commerce Znajomość zagadnień związanych z oceną jakości modeli, kosztami inferencji oraz bezpieczeństwem danych Technologie z jakimi będziesz pracować Java Kotlin Spring Boot Google Cloud Platform (Cloud Run, GKE, Pub/Sub, Cloud Storage, BigQuery) Docker Kubernetes Kafka / Pub/Sub CI/CD Git Vertex AI / OpenAI API / LangChain / Spring AI / Gemini LLM, RAG, Embeddingi, Generative AI Klient – dlaczego warto wybrać akurat tego klienta z portfolio JIT? Nasz Klient to lider polskiego rynku e-commerce , który od lat wyznacza kierunki rozwoju branży. Z platformy korzysta ponad 20 milionów użytkowników , a organizacja nieustannie inwestuje w rozwój produktów, technologii i nowych obszarów biznesowych. To jedna z największych firm technologicznych w Polsce , zatrudniająca ponad 1000 specjalistów IT pracujących nad nowoczesnymi, autorskimi rozwiązaniami. Dołączając do projektu, będziesz współtworzyć systemy wykorzystywane każdego dnia przez miliony użytkowników. To doskonała okazja do pracy z nowoczesnymi technologiami, w środowisku stawiającym na skalowalność, wydajność i rozwój innowacyjnych rozwiązań. O Jit Team The Human factor of IT - to nie tylko slogan, to filozofia. Fundamentem Jit Team są ludzie, dlatego to właśnie Was traktujemy priorytetowo. Zatrudniamy ponad 770 doświadczonych ekspertów , którym oferujemy rozwojowe projekty, szeroki zakres benefitów oraz autorski program rozwoju zawodowego. Wspólnie z klientami z całego świata tworzymy innowacyjne rozwiązania IT, dostarczane przez wysoko specjalizowane i efektywne zespoły. Za naszą maksymą stoją, także działania charytatywne i edukacyjne. Wspieramy szkoły, uczelnie i instytucje edukacyjne – prowadząc zajęcia, projekty edukacyjne, sponsorując wydarzenia czy przekazując sprzęt do nauki. Oferujemy staże umożliwiające rozpoczęcie kariery w IT. Wspieramy ratowników wodnych oraz szpitale, dostarczając potrzebne wyposażenie. Wspieramy też liczne organizacje charytatywne wspierające ubogich, dzieci i osoby starsze. Jesteśmy Polską firmą i dzielimy się tym, co osiągnęliśmy przez ponad 15 lat działalności. Wspierając rodzime inicjatywy, dbamy o obieg dobrej energii.

🏢 Summary: Oferta dotyczy rozwoju skalowalnych aplikacji backendowych i mikroserwisów w Java oraz Kotlin z wykorzystaniem Google Cloud Platform i technologii AI/LLM. Rola obejmuje projektowanie architektury, rozwój API oraz optymalizację środowisk produkcyjnych w dużej skali. Praca odbywa się zdalnie z Polski z okazjonalnymi wizytami w biurze w Warszawie lub Poznaniu. 🗂️ Requirements: Minimum 3 lata doświadczenia w programowaniu backendowym, Bardzo dobra znajomość Java, Praktyczna znajomość Spring Boot, Praktyczna znajomość Kotlin, Doświadczenie z architekturą mikroserwisową, Doświadczenie z Google Cloud Platform, Znajomość Docker, Znajomość Kubernetes, Znajomość Git, Znajomość CI/CD 📃 Skills: Java, Kotlin, Spring, GCP, CloudRun, GKE, PubSub, CloudStorage, BigQuery, Docker, Kubernetes, Kafka, REST, SQL, NoSQL, Git, CI/CD, VertexAI, OpenAI, LangChain 🏢 Description: Wynagrodzenie: 600 - 1000 PLN netto + VAT/ MD Praca zdalna: praca zdalna z terenu Polski z okazjonalnymi wizytami w biurze w Warszawie / Poznaniu (ok. raz w miesiącu) Dlaczego warto wybrać tę ofertę? Praca przy rozwoju nowoczesnych aplikacji backendowych w PHP Realny wpływ na architekturę i kierunek rozwoju tworzonych rozwiązań Udział w rozwiązywaniu złożonych wyzwań technologicznych i optymalizacji środowisk produkcyjnych Bliska współpraca z doświadczonymi specjalistami z obszaru Product, QA i IT Kultura oparta na wymianie wiedzy, code review i ciągłym doskonaleniu jakości kodu Projekt Dołączysz do zespołu rozwijającego skalowalne aplikacje i usługi chmurowe. Będziesz tworzyć nowoczesne rozwiązania backendowe oraz wdrażać funkcjonalności oparte na Generative AI we współpracy z zespołami produktowymi, architektonicznymi i AI. Zakres obowiązków: Rozwój aplikacji backendowych w Java i Kotlin Tworzenie i r ozwój mikroserwisów oraz API Projektowanie wydajnych i skalowalnych rozwiązań w Google Cloud Platform Wykorzystanie technologii AI/LLM w produktach Udział w projektowaniu architektury, code review i optymalizacji aplikacji Wymagane kompetencje i doświadczenie: Min. 3 lata doświadczenia w programowaniu backendowym Bardzo dobra znajomość Java, Spring Boot Praktyczna znajomość Kotlin Doświadczenie z architekturą mikroserwisową oraz Google Cloud Platform Znajomość Docker, Kubernetes, Git i CI/CD Doświadczenie z AI/LLM oraz narzędziami takimi jak Vertex AI, OpenAI API, LangChain lub Spring AI będzie dużym atutem Technologie z jakimi będziesz pracować Java Kotlin Spring Boot Google Cloud Platform (Cloud Run, GKE, Pub/Sub, Cloud Storage, BigQuery) Docker Kubernetes Kafka / Google Cloud Pub/Sub REST API Relacyjne i NoSQL bazy danych Git CI/CD Klient – dlaczego warto wybrać akurat tego klienta z portfolio JIT? Nasz klient to największy fintech w Europie środkowej - unikalne miejsce, gdzie na bardzo dużą skalę można obsługiwać finanse, korzystając z najnowszych technologii. Jest to spółka wspierająca lidera polskiego rynku e-commerce (z 20 milionami użytkowników). Jest to również duża firma technologiczna, rozwijająca swoje własne technologie i inwestująca szeroko w różne „nowinki” techniczne . Współpraca z tym klientem rozpoczęła wiosną 2021 roku. Zespoły Jit Team zajmują się rozwojem systemu dotyczącego odroczonych płatności oraz wprowadzeniem własnej metody płatności, która ma zastąpić dotychczasowe rozwiązanie. Współpraca z tym Klientem, to okazja do budowania powszechnego rozwiązania, używanego na co dzień przez wielu z nas. To również okazja do budowy oprogramowania, które działa w naprawdę dużej skali – gdzie każda sekunda opóźnienia pomnożona przez liczby użytkowników to ogromny problem. Jest to również okazja do pracy z nowoczesnymi, innowacyjnymi technologiami i narzędziami, które trudno znaleźć gdzie indziej. O Jit Team The Human factor of IT - to nie tylko slogan, to filozofia. Fundamentem Jit Team są ludzie, dlatego to właśnie Was traktujemy priorytetowo. Zatrudniamy ponad 770 doświadczonych ekspertów , którym oferujemy rozwojowe projekty, szeroki zakres benefitów oraz autorski program rozwoju zawodowego. Wspólnie z klientami z całego świata tworzymy innowacyjne rozwiązania IT, dostarczane przez wysoko specjalizowane i efektywne zespoły. Za naszą maksymą stoją, także działania charytatywne i edukacyjne. Wspieramy szkoły, uczelnie i instytucje edukacyjne – prowadząc zajęcia, projekty edukacyjne, sponsorując wydarzenia czy przekazując sprzęt do nauki. Oferujemy staże umożliwiające rozpoczęcie kariery w IT. Wspieramy ratowników wodnych oraz szpitale, dostarczając potrzebne wyposażenie. Wspieramy też liczne organizacje charytatywne wspierające ubogich, dzieci i osoby starsze. Jesteśmy Polską firmą i dzielimy się tym, co osiągnęliśmy przez ponad 15 lat działalności. Wspierając rodzime inicjatywy, dbamy o obieg dobrej energii.

🏢 Summary: Remote B2B role focused on building and expanding a large-scale analytical and operational data ecosystem delivering campaign performance insights and investment decision support. The position involves developing high-throughput data pipelines, reporting engines, and attribution systems using a modern cloud-based stack. You will work on production-grade data models and scalable systems supporting millions of users. 🗂️ Requirements: Minimum 3 years commercial experience with Java or Kotlin or Scala, Experience with distributed data pipelines, Experience with data processing and analytics systems, Knowledge of GCP cloud environment, Experience with large-scale data systems, Understanding of microservices architecture, Understanding of event-driven systems, Knowledge of data modeling, Willingness to participate in on-call duties, Availability for monthly visits to Warsaw 📃 Skills: Java, Kotlin, Scala, GCP, BigQuery, PostgreSQL, Airflow, Composer, Spark, Spring, Kafka, Microservices, Avro, Terraform, Analytics, DataModeling 🏢 Description: Salary: 600-960 pln/md on B2B Work mode: Remote (with visits to Warsaw once a month and w illingness to participate in on-call duties) Why choose this offer? Work on a high-impact data ecosystem Exposure to large-scale data processing , advanced analytics, and production-grade data models Modern tech stack (GCP, Spark, Airflow, Kafka, microservices) Project Development and expansion of an advanced analytical and operational ecosystem . The project focuses on delivering precise campaign performance data (Insights & Performance) and building tools that support large-scale investment decision-making. It includes creating reliable reporting systems, data attribution models, and scalable data pipelines, ensuring high-quality data availability for professional users. Expected competences and knowledge At least 3 years of commercial experience with Java / Kotlin / Scala Solid understanding of data processing and analytics systems Experience with distributed data pipelines and orchestration tools Knowledge of GCP cloud environment Experience working with large-scale data systems (e.g. BigQuery, Spark) Familiarity with microservices architecture and event-driven systems Understanding of data modeling and data productionization Nice to have Knowledge of Apache ecosystem, Avro, Terraform Responsibilities you’ll have Designing and developing reporting engines and attribution systems (Insights & Performance) Building and maintaining high-throughput data pipelines Collaborating with Data Science teams to productionize advanced data models Ensuring scalability, reliability, and performance of data systems Developing internal tools (bulk management, agency panels, RBAC systems) Supporting complex account structures and permissions management Willingness to participate in on-call duties Technologies you'll work with Java / Kotlin / Scala GCP (BigQuery) PostgreSQL Apache Airflow / Composer Apache Spark Spring Boot Kafka Microservices architecture Apache, Avro, Terraform Client – why choose this particular client from the Jit portfolio? Our Client dominates the Polish e-commerce arena as the market leader since 1999 . With a user base of over 20 million and growing, this well-established platform is at the forefront of e-commerce, constantly striving for growth through market expansion and investment. As a major player in technology, our Client boasts a talented IT team of over 1,000 employees who focus on developing their own cutting-edge technologies. Jit Team has had a successful partnership with our Client since spring 2021 , with multiple software development teams dedicated to our Client's platforms. These teams operate autonomously, designing platform components through micro-services. Working with our Client offers a chance to contribute to a solution used by millions on a daily basis and to tackle the challenge of delivering software at a massive scale , where even a single second of delay can have a significant impact. This project provides a unique opportunity to work with state-of-the-art technologies and tools, making it a rare and valuable experience. About Jit Team The Human factor of IT - it's not just a slogan, it's a philosophy. The foundation of Jit Team is people, which is why we prioritise you. We employ over 700 experienced experts . We create highly specialised teams for clients from all over the world. We offer team members developmental projects, a wide range of benefits and a proprietary professional development programme. Behind our maxim are also charitable and educational activities. We support pupils and students by donating learning equipment. We offer internships to help launch careers in IT. We support water rescuers and hospitals by providing the necessary equipment. We are a Polish company and we share what we have achieved over 15 years of activity . By supporting indigenous initiatives, we ensure the circulation of good energy.

🏢 Summary: Senior Backend Java Developer role in a long-term project building scalable, high-performance backend systems integrated with AWS cloud services. The position focuses on clean architecture, batch processing, and containerized deployments within an agile environment. Opportunity to shape technical decisions while working on a business-critical enterprise system. 🗂️ Requirements: Minimum 8 years of experience in Java backend development, Strong proficiency in Java, Solid knowledge of PostgreSQL, Experience with database optimization, Hands-on experience with Hibernate Criteria API, Experience with Spring Boot, Experience with Spring Batch, Experience with batch processing, Practical knowledge of AWS services (ECS, S3, RDS), Experience with Docker, Knowledge of REST API design, Understanding of clean architecture principles 📃 Skills: Java, Spring, SpringBoot, SpringBatch, Hibernate, PostgreSQL, AWS, ECS, S3, RDS, Docker, REST, SQL, AI 🏢 Description: Salary: 1200 - 1600 pln/md on B2B Hybrid model : hybrid from Gdynia (2 day working from the office, final details to be discussed with the team) Why choose this offer? Be part of a development team working on a long-term project Opportunity to shape technical decisions and best practices from the start Work on a scalable, high-performance system with a strong focus on clean architecture Gain hands-on experience with cloud technologies and containerization Project This project will focus on developing scalable backend solutions for high-demand business operations, integrating cloud services, and ensuring system reliability. You will work in an agile environment with a strong emphasis on code quality, clean architecture, and performance optimization. Expected competences and knowledge Min. 8 years of experience and proficiency in Java and backend development principles Solid understanding of PostgreSQL and database optimization techniques Hands-on experience with Hibernate Criteria API for efficient data queries Experience with Docker for containerization and deployment In-depth knowledge of the Spring ecosystem ( Spring Boot, Spring Batch) Experience in batch processing using Spring Batch Practical knowledge of AWS services , including ECS, S3, and RDS Openness to adopting and working with AI tools What you'll be doing Developing new application modules based on business requirements Reviewing and improving code , ensuring high maintainability and scalability Designing and implementing efficient backend solutions Writing clean, structured, and scalable code following best practices Technologies you'll work with Java Spring (Boot, Batch) Hibernate REST API PostgreSQL AWS (ECS, S3, RDS) Docker AI Client – why choose this particular client from the Jit portfolio? We have partnered with our Client, a leading HR company with over 60 years of experience and a presence in multiple countries around the world. Our Client provides a wide range of recruitment and job placement services and is dedicated to helping individuals achieve their career goals. In Poland, our Client has been operating for over 20 years and is at the forefront of digitization in the HR services industry. Our team has been building the Time tracking system for our Client since 2019 , a complex tool for registering and settling the working time of full-time and temporary employees working under different legal and organizational conditions, supporting on-boarding processes, and integrating with the employee portal and mobile app. As a member of Jit Team, you will have the opportunity to work on a modern, complex enterprise-class system built in modern technologies such as Java and the AWS cloud . With a business-critical operation, the Work Time system settles working time for tens of thousands of employees every month and contributes to our Client's revenue. About Jit Team The Human Factor of IT - it’s not just a slogan, it’s a philosophy. The foundation of Jit Team is people, which is why we prioritise you. We employ over 770 experienced experts , to whom we offer developmental projects, a wide range of benefits, and a proprietary professional development programme. Together with clients from around the world, we create innovative IT solutions delivered by highly specialised and efficient teams. Behind our maxim are also charitable and educational activities. We support schools, universities, and educational institutions by conducting workshops, running educational projects, sponsoring events, and donating learning equipment. We offer internships that help launch careers in IT. We support water rescuers and hospitals by providing the necessary equipment. We also support numerous charitable organisations helping people in need, children, and the elderly. We are a Polish company and we share what we have achieved over more than 15 years of activity. By supporting local initiatives, we contribute to the circulation of good energy.

🏢 Summary: Development, modernization and maintenance of IT systems for the national power transmission operator, supporting the energy sector and renewable sources. The role includes building microservice-based solutions, preparing technical documentation, R&D activities and business process automation. Long-term remote B2B cooperation with systems critical to the power grid reliability. 🗂️ Requirements: Minimum 10 years of experience in Java, Minimum 10 years of experience in TypeScript, Experience in microservices architecture, Experience with SQL databases, Experience with DevSecOps practices, Experience with containerization and orchestration tools 📃 Skills: Java, TypeScript, JakartaEE, Quarkus, JPA, Hibernate, Angular, Microprofile, REST, HTML, CSS, SQL, Oracle, Docker, Kubernetes, Nomad, Kafka, Redis, Jenkins, GitLab, Testcontainers, Microservices, DevSecOps, Reactive, Messaging 🏢 Description: Wynagrodzenie: 1000 - 1100 PLN/MD na B2B Model pracy: praca zdalna (z przyjazdami do biura we Wrocławiu raz na dwa miesiące) Dlaczego warto wybrać tę ofertę? Praca przy systemach dla krajowego operatora systemu przesyłowego Udział w projektach wspierających system elektroenergetyczny oraz odnawialne źródła energii Świadczenie usług budowy systemów informatycznych Stabilna współpraca przy długofalowym rozwoju systemów Projekt Projekt polega na budowie, rozwoju i utrzymaniu systemów informatycznych oraz sporządzaniu ich dokumentacji zgodnie ze zleceniami Zamawiającego. Systemy są rozwijane i modernizowane w sektorze energetycznym. Prace obejmują również działania badawczo‑rozwojowe oraz automatyzację procesów biznesowych. Celem projektu jest zapewnienie efektywnej i niezawodnej pracy systemu elektroenergetycznego . Wymaganiem jest minimum 10 lat doświadczenia w programowaniu w językach Java i TypeScript. Dodatkowym atutem jest znajomość branży energetycznej. Technologie z jakimi będziesz pracować Java TypeScript Wzorce projektowe, wzorce integracyjne Mikroserwisy JakartaEE Quarkus JPA, Hibernate Angular Microprofile Reactive Messaging REST API HTML / CSS Bazy danych SQL (Oracle) Praktyki DevSecOps Docker, Kubernetes (K8s) lub NomadApache Kafka, Redis, Jenkins, GitLab Pipelines, Testcontainers Klient – dlaczego warto wybrać akurat tego klienta z portfolio JIT? Nasz klient specjalizuje się w rozwijaniu innowacyjnych rozwiązań technologicznych w sektorze energetycznym i działa na terenie całej Polski od ponad 12 la t. Klient wspiera krajowego operatora systemu przesyłowego poprzez budowę i modernizację systemów informatycznych oraz prowadzenie prac badawczo-rozwojowych. Firma wdraża także zaawansowaną automatyzację procesów biznesowych, co pozwala na zwiększenie efektywności działania. Głównym założeniem naszego klienta jest zapewnienie efektywnej i niezawodnej pracy systemu elektroenergetycznego, wspierając jednocześnie rozwój odnawialnych źródeł energii. O Jit Team The Human factor of IT – to nie tylko slogan, to filozofia. Fundamentem Jit Team są ludzie, dlatego to właśnie Was traktujemy priorytetowo. Zatrudniamy ponad 700 doświadczonych ekspertów. Tworzymy wysoko specjalizowane zespoły dla klientów z całego świata. Członkom zespołu oferujemy rozwojowe projekty, szeroki zakres benefitów oraz autorski program rozwoju zawodowego. Za naszą maksymą stoją, także działania charytatywne i edukacyjne. Wspieramy uczniów i studentów, przekazując sprzęt do nauki. Oferujemy staże ułatwiające rozpoczęcie kariery w IT. Wspieramy ratowników wodnych oraz szpitale, dostarczając potrzebne wyposażenie. Jesteśmy Polską firmą i dzielimy się tym, co osiągnęliśmy przez 15 lat działalności. Wspierając rodzime inicjatywy, dbamy o obieg dobrej energii.

🏢 Summary: Remote Java Developer role focused on building and maintaining highly scalable backend services for advertising campaign management, including budgeting and billing domains. The position involves designing high-availability, horizontally scalable solutions within a cross-functional team and collaborating directly with product stakeholders. Opportunity to work in a cloud-based, distributed environment supporting large-scale, data-intensive systems. 🗂️ Requirements: Commercial experience in Java or Kotlin, Experience with Spring Boot, Knowledge of object-oriented programming and design patterns, Understanding of microservices architecture and distributed systems, Experience with PostgreSQL, Basic knowledge of MongoDB, Understanding of asynchronous and event-driven systems, Experience with REST APIs and service integration, Ability to work in cloud-based environments 📃 Skills: Java, Kotlin, Spring, SpringBoot, MongoDB, PostgreSQL, Kafka, Microservices, REST, Git, CI/CD, GoogleCloud, BigQuery 🏢 Description: Salary: 600 - 1000 PLN / dzień Remote work Why choose this offer? Real impact on system architecture Opportunity to design solutions with high availability and horizontal scalability Collaboration within a mature, cross-functional team Direct communication with Product Owners and non-technical stakeholders Project We are looking for a Java Developer to join a team responsible for developing and maintaining core services related to advertising campaign management. The team builds solutions that enable business users and advertising agencies to create and manage advertising campaigns, which are then delivered to various advertising channels and platforms. The scope of responsibility also includes budgeting and billing services related to advertising activities. The team works closely with multiple engineering and product teams responsible for campaign delivery, frontend applications, and other business-critical domains. The environment consists of highly scalable backend systems, distributed services, and data-intensive solutions that support key business processes. Expected competences and knowledge Commercial experience in Java and/or Kotlin development Good understanding of backend application development using Spring Boot Knowledge of object-oriented programming principles and software design patterns Familiarity with microservices architecture and distributed systems concepts Experience working with relational databases PostgreSQL Basic knowledge of NoSQL databases MongoDB Understanding of asynchronous communication and event-driven systems Experience with REST APIs and integration between services Eagerness to learn and develop in a modern cloud-based environment Technologies you'll work with Java, Kotlin Spring Boot MongoDB PostgreSQL Kafka Event-Driven Architecture Google Cloud BigQuery Microservices REST APIs Git CI/CD Pipelines Cloud-based services and distributed systems Client – why choose this particular client from the Jit portfolio? Our Client dominates the Polish e-commerce arena as the market leader since 1999 . With a user base of over 20 million and growing, this well-established platform is at the forefront of e-commerce, constantly striving for growth through market expansion and investment. As a major player in technology, our Client boasts a talented IT team of over 1,000 employees who focus on developing their own cutting-edge technologies. Jit Team has had a successful partnership with our Client since spring 2021 , with multiple software development teams dedicated to our Client's platforms. These teams operate autonomously, designing platform components through micro-services. Working with our Client offers a chance to contribute to a solution used by millions on a daily basis and to tackle the challenge of delivering software at a massive scale , where even a single second of delay can have a significant impact. This project provides a unique opportunity to work with state-of-the-art technologies and tools, making it a rare and valuable experience. About Jit Team The Human Factor of IT - it’s not just a slogan, it’s a philosophy. The foundation of Jit Team is people, which is why we prioritise you. We employ over 770 experienced experts , to whom we offer developmental projects, a wide range of benefits, and a proprietary professional development programme. Together with clients from around the world, we create innovative IT solutions delivered by highly specialised and efficient teams. Behind our maxim are also charitable and educational activities. We support schools, universities, and educational institutions by conducting workshops, running educational projects, sponsoring events, and donating learning equipment. We offer internships that help launch careers in IT. We support water rescuers and hospitals by providing the necessary equipment. We also support numerous charitable organisations helping people in need, children, and the elderly. We are a Polish company and we share what we have achieved over more than 15 years of activity. By supporting local initiatives, we contribute to the circulation of good energy.

🏢 Summary: Frontend Architect role in a financial project focused on building secure, high-performance, interactive web applications supporting complex workflows and real-time data. The position involves shaping frontend architecture, developing Web Components, and ensuring code quality and performance across large-scale systems. Hybrid work model with strong emphasis on technical excellence and collaboration in international teams. 🗂️ Requirements: Strong expertise in HTML, CSS, JavaScript, TypeScript, Experience with Web Components and Lit, Solid understanding of Node.js and npm ecosystem, Experience writing unit tests with Vitest, Strong knowledge of frontend architecture and design patterns, Experience with performance optimization and Core Web Vitals, Ability to integrate REST and GraphQL APIs, Experience in large-scale, modular frontend codebases 📃 Skills: TypeScript, JavaScript, HTML5, CSS3, Sass, WebComponents, Lit, Node.js, npm, Vitest, Playwright, REST, GraphQL, CI/CD, GitHubActions, GitLabCI, Kafka, MQ, NinjaFork 🏢 Description: Salary: 900-1200 PLN/day on B2B Work model: hybrid from Gdynia / Gdańsk / Warszawa / Łódź (2/3 days per week from the office) Why choose this offer? You can expect a flexible work organization The international work environment will give you the opportunity to interact with the English language on a daily basis Scandinavian organizational culture will provide you with work-life balance, you will gain time for additional training (financed by Jit) The Jit community will bring you a nice time during regular integration meetings Project You will be involved in a financial project focused on building secure, high‑performance, and highly interactive web applications that support complex business workflows, real‑time data processing, and seamless user experiences. You’ll play a key role in shaping the frontend architecture, ensuring code quality, and driving technical excellence across the team. Responsibilities you'll have Architect and implement complex, interactive user interfaces and single‑page applications using TypeScript and JavaScript Define and maintain best practices for frontend architecture, state management, and component reusability Develop and maintain Web Components using Lit, ensuring modularity and long‑term maintainability Optimize application performance, improve Core Web Vitals, and ensure smooth experiences across devices and browsers Collaborate closely with backend engineers, UX/UI designers, and product managers to deliver end‑to‑end product features Integrate with REST and GraphQL APIs, ensuring reliability, security, and consistency of data flows. Conduct performance audits, code reviews, and mentor other developers Contribute to CI/CD pipelines and deployment workflows (nice‑to‑have) Participate in system design discussions and influence technical decisions across the product Expected competences and knowledge Strong expertise in HTML, CSS, JavaScript, TypeScript Experience with Web Components and Lit Solid understanding of Node.js and npm ecosystem Experience writing unit tests with Vitest Strong knowledge of frontend architecture, design patterns, and performance optimization Ability to work with REST/GraphQL APIs Experience in large‑scale, modular frontend codebases Strong communication skills and ability to collaborate in cross‑functional teams Technologies you'll work with TypeScript, JavaScript Web Components, Lit HTML5, CSS3, Sass Node.js, npm Vitest, Playwright (optional) REST, GraphQL CI/CD tools (GitHub Actions, GitLab CI, or similar) Kafka, MQ systems (nice‑to‑have) NinjaFork (nice‑to‑have) Client – why choose this particular client from the Jit portfolio? Jit Team has had an over-decade-long relationship with the leading financial group in the Nordic countries, and we are privileged to be our client's premier partner in Poland. At present, over 200 Jit personnel are engaged in the completion of more than 60 projects for this Norwegian major provider of financial services with a global presence and a strong focus on modern technology. Our customer's work atmosphere is epitomized by the Scandinavian culture , which is conducive to people who place emphasis on work-life balance and feedback culture . Furthermore, all projects are executed in international teams, giving constant exposure to the English language. About Jit Team The Human Factor of IT - it’s not just a slogan, it’s a philosophy. The foundation of Jit Team is people, which is why we prioritise you. We employ over 770 experienced experts , to whom we offer developmental projects, a wide range of benefits, and a proprietary professional development programme. Together with clients from around the world, we create innovative IT solutions delivered by highly specialised and efficient teams. Behind our maxim are also charitable and educational activities. We support schools, universities, and educational institutions by conducting workshops, running educational projects, sponsoring events, and donating learning equipment. We offer internships that help launch careers in IT. We support water rescuers and hospitals by providing the necessary equipment. We also support numerous charitable organisations helping people in need, children, and the elderly. We are a Polish company and we share what we have achieved over more than 15 years of activity. By supporting local initiatives, we contribute to the circulation of good energy.

🏢 Summary: B2B contract role for a Platform/Automation Engineer to build and enhance a Developer Experience Portal based on Backstage.io within a Zero Trust environment. The position focuses on improving developer productivity through self-service automation, platform APIs, and UX/UI-driven solutions using Node.js and React. Hybrid work model with strong emphasis on modern platform engineering practices. 🗂️ Requirements: Strong Node.js programming skills, Advanced knowledge of React, Experience with Backstage.io and plugin development, Experience in UX/UI design, Experience with YAML-based configuration, Experience with Infrastructure as Code, Ability to develop and integrate Platform APIs 📃 Skills: Node.js, React, Backstage, YAML, IaC, APIs, UX/UI 🏢 Description: Salary: 1000-1300 PLN/day on B2B Work model: elastic hybrid from Warszawa (3 days per week from the office) Why choose this offer? You can expect a flexible work organization The international work environment will give you the opportunity to interact with the English language on a daily basis Scandinavian organizational culture will provide you with work-life balance, you will gain time for additional training (financed by Jit) The Jit community will bring you a nice time during regular integration meetings Project You will be involved in a financial project focused on building and enhancing a Developer Experience Portal based on Backstage.io within a Zero Trust security environment. The role is part of the Automation / Platform Engineering area, aiming to improve developer productivity, self-service capabilities, and secure platform access. Responsibilities you'll have Development of the Developer Experience Portal (Backstage.io) using Node.js and React Designing UX/UI solutions for both personal implementations and broader developer usage Building and maintaining self-service automation workflows and templates Developing and integrating Platform APIs Contributing to platform engineering and tech stack evolution Collaborating with Zero Trust and Developer Experience teams Expected competences and knowledge Strong Node.js programming skills Advanced knowledge of React Experience with Backstage.io , including plugin development UX/UI design experience with strong aesthetic sense Experience with YAML -based configuration (Infrastructure as Code) Nice to have Experience with CI/CD pipelines and automation Knowledge of Docker and Kubernetes Experience with network segmentation automation, including: Physical firewalling (Check Point, Ansible), Virtual firewalling (NSX DFW, Terraform), Google Cloud firewalling Technologies you'll work with Node.js React Backstage.io YAML / IaC CI/CD tools Docker Kubernetes Ansible Terraform NSX DFW Google Cloud Platform (GCP) Client – why choose this particular client from the Jit portfolio? Jit Team has had an over-decade-long relationship with the leading financial group in the Nordic countries, and we are privileged to be our client's premier partner in Poland. At present, over 200 Jit personnel are engaged in the completion of more than 60 projects for this Norwegian major provider of financial services with a global presence and a strong focus on modern technology. Our customer's work atmosphere is epitomized by the Scandinavian culture , which is conducive to people who place emphasis on work-life balance and feedback culture . Furthermore, all projects are executed in international teams, giving constant exposure to the English language. About Jit Team The Human factor of IT - it's not just a slogan, it's a philosophy. The foundation of Jit Team is people, which is why we prioritise you. We employ over 700 experienced experts . We create highly specialised teams for clients from all over the world. We offer team members developmental projects, a wide range of benefits and a proprietary professional development programme. Behind our maxim are also charitable and educational activities. We support pupils and students by donating learning equipment. We offer internships to help launch careers in IT. We support water rescuers and hospitals by providing the necessary equipment. We are a Polish company and we share what we have achieved over 15 years of activity . By supporting indigenous initiatives, we ensure the circulation of good energy.

🏢 Summary: Senior Frontend Developer with strong .NET background to design and build a financial web application (Economic Profitability Calculator) in an Agile environment. The role focuses on Angular-based frontend development with backend support in .NET, ensuring high code quality and CI/CD automation. Hybrid work model with close collaboration with Product Owner and domain experts. 🗂️ Requirements: 8+ years of experience with Angular, 5+ years of experience in web development (HTML, JavaScript, TypeScript, CSS), 3+ years of experience in .NET and C# web development, 3+ years of experience with SQL, 2+ years of experience with Docker and Kubernetes, Experience with CI/CD process automation, Experience working in Agile environment, English proficiency minimum B2 level 📃 Skills: Angular, TypeScript, HTML, JavaScript, CSS, .NET, C#, SQL, Docker, Kubernetes, MSSQL, Dapper, Git, JIRA, Bamboo, Confluence, Bitbucket 🏢 Description: Salary: 900 - 1200 PLN/day on B2B Work model: elastic hybrid from Gdynia / Gdańsk (at least 2 days per week from the office) Why choose this offer? You can expect a flexible work organization The international work environment will give you the opportunity to interact with the English language on a daily basis Scandinavian organizational culture will provide you with work-life balance, you will gain time for additional training (financed by Jit) The Jit community will bring you a nice time during regular integration meetings Project We are looking for a passionate developer with a strong focus on frontend development and a background in .NET to join the Economic Profitability Calculator Team of our financial sector client. You will play a valuable role in designing and building an EPC web application, working closely with Subject Matter Experts and having a real influence on the product. Responsibilities you'll have Designing and implementing EPC business processes with a strong focus on the frontend part Ensuring code quality through high test automation coverage, code reviews, and pair programming Working in an Agile setup Cooperating closely with the Product Owner and Subject Matter Experts Maintaining and extending CI/CD process automation Expected competences and knowledge 8+ years of experience with Angular 5+ years of experience in web development ( HTML, JavaScript, TypeScript, CSS ) 3+ years of experience in .NET and C# web development 3+ years of experience with SQL 2+ years of experience with Docker and Kubernetes Technology enthusiast focused on high product quality and good UX Passion for frontend development with experience in backend development Team-player mindset Willingness to continuously improve competences Good communication skills, including communication in English (min. B2 level) Nice to have Experience with UI test automation Experience with CI/CD tools (Bamboo) Experience using an AI coding assistant Technologies you'll work with Angular TypeScript HTML JavaScript CSS .NET C# Docker Kubernetes MS SQL Server Dapper Git Atlassian Stack (JIRA, Bamboo, Confluence, Bitbucket) Client – why choose this particular client from the Jit portfolio? Jit Team has had an over-decade-long relationship with the leading financial group in the Nordic countries, and we are privileged to be our client's premier partner in Poland. At present, over 200 Jit personnel are engaged in the completion of more than 60 projects for this Norwegian major provider of financial services with a global presence and a strong focus on modern technology. Our customer's work atmosphere is epitomized by the Scandinavian culture , which is conducive to people who place emphasis on work-life balance and feedback culture . Furthermore, all projects are executed in international teams, giving constant exposure to the English language. About Jit Team The Human factor of IT - it's not just a slogan, it's a philosophy. The foundation of Jit Team is people, which is why we prioritise you. We employ over 700 experienced experts . We create highly specialised teams for clients from all over the world. We offer team members developmental projects, a wide range of benefits and a proprietary professional development programme. Behind our maxim are also charitable and educational activities. We support pupils and students by donating learning equipment. We offer internships to help launch careers in IT. We support water rescuers and hospitals by providing the necessary equipment. We are a Polish company and we share what we have achieved over 15 years of activity . By supporting indigenous initiatives, we ensure the circulation of good energy.