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: Remote B2B role for a Mobile Developer to build and optimize advertising components in a large-scale Android e-commerce application. The position focuses on native Android development combined with WebView-based ad integrations in a performance-critical environment. You will ensure high app performance while integrating JavaScript-driven advertising solutions. 🗂️ Requirements: 3+ years commercial experience in native Android development with Kotlin, Strong knowledge of mobile architecture patterns (MVVM, MVI, Clean Architecture), Hands-on experience with Android WebView and native-to-web communication, Solid knowledge of JavaScript, HTML and CSS, Experience with REST APIs and asynchronous programming, Ability to write unit and integration tests, Strong understanding of software engineering principles, Knowledge of data structures and algorithms 📃 Skills: Kotlin, Android, WebView, JavaScript, HTML, CSS, REST, Git, MVVM, MVI, CleanArchitecture, Asynchronous, UnitTesting, IntegrationTesting, DataStructures, Algorithms 🏢 Description: Salary: 960 - 1200 PLN/MD + VAT (B2B) Work Model: remote Why choose this offer? Impact on the development of the largest e-commerce system in Poland You can expect a flexible work organization The Jit community will bring you a nice time during regular integration meetings Project We are looking for a Mobile Developer to support a project in the Advertising domain for one of Poland’s leading e-commerce platforms. The engineer will work within a team responsible for the technological layer of ad delivery in a large-scale mobile application. You will contribute to building and optimizing advertising components in a performance-critical environment, balancing monetization goals with excellent user experience. This includes ensuring that advertising scripts and integrations do not negatively impact application performance (e.g., blocking the main thread). We are looking for a hybrid-minded developer who understands both native mobile development and web-based ad technologies—especially JavaScript execution within WebView contexts—while maintaining a strong foundation in the native Android stack. Expected competences and knowledge 3+ years of commercial experience in native Android development (Kotlin) Strong understanding o f mobile application architecture patterns (e.g., MVVM, MVI, Clean Architecture) Hands-on experience with Android WebView , including native-to-web communication Solid understanding of JavaScript, HTML, and CSS Experience with REST APIs and asynchronous programming Ability to write unit and integration tests Strong understanding of software engineering principles, data structures, and algorithms Proactive problem-solving mindset and passion for building high-quality user experiences (UX) Nice to have : Experience with high-traffic mobile applications Knowledge of RxJava/RxKotlin, Coroutines, or Jetpack Compose Familiarity with A/B testing Open-source contributions or active GitHub profile Experience in Agile/Scrum environments Technologies you'll work with Kotlin (Android) JavaScript HTML / CSS Android WebView REST APIs Git Jetpack Compose Coroutines / RxJava 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 Mobile Developer role for a large-scale e-commerce mobile application focused on ad delivery and user experience improvements. The position involves designing, developing, and optimizing high-performance Android features while collaborating with cross-functional teams in a fast-paced environment. The offer includes remote work with occasional visits to Warsaw and a high degree of team autonomy. 🗂️ Requirements: 5+ years of commercial Android development experience, Strong Kotlin knowledge, Experience with MVVM, MVI, or Clean Architecture, Experience with REST APIs, Knowledge of asynchronous programming, Ability to write unit and integration tests, Experience with Git, Understanding of software engineering principles, data structures, and algorithms, Experience with CI/CD pipelines, English communication skills 📃 Skills: Kotlin, Android, REST, Git, MVVM, MVI, CI/CD, RxJava, RxKotlin, Coroutines, JetpackCompose 🏢 Description: Salary: 1000 - 1200/ MD + VAT (B2B) Remote: remotely (with occasional visits to the client's office - Warsaw) Why choose this offer? Working in a team you can always count on we have on board top-class specialists and experts in their areas of expertise A high degree of autonomy in terms of organizing your teams work - we encourage you to develop continuously and try out new things Work on a consumer-focused mobile project improving category experience and user interactions, directly impacting business results Project We are looking for a Senior Mobile Developer to support a project for one of Poland’s leading e-commerce platforms. The engineer will work within a team responsible for the technological layer of ad delivery in a large-scale mobile application. You will work closely with product owners, designers, and other engineers to translate user needs into robust, high-performance mobile experiences . This role is ideal for someone with solid experience in mobile development, a strong understanding of software engineering principles, and a desire to grow their expertise in a fast-paced e-commerce environment. What you will be doing on this postion: Design, develop, test, and deploy features, ensuring high quality, performance, and responsiveness Collaborate with product, design, and other engineering teams to define and implement innovative solutions Participate in code reviews, contribute to technical discussions, and help maintain high code quality standards Identify and resolve performance and scalability issues Continuously improve our development processes, tools, and infrastructure Expected competences and knowledge 5+ years of commercial experience in native Android development (Kotlin) Strong understanding o f mobile application architecture patterns (e.g., MVVM, MVI, Clean Architecture) Experience with REST APIs and asynchronous programming Proficiency in writing unit and integration tests Familiarity with version control systems (e.g., Git) Solid understanding of software engineering principles, data structures, and algorithms Experience with continuous integration and continuous delivery (CI/CD) pipelines Good communication skills in English, both written and spoken Nice to have : Experience with high-traffic mobile applications Knowledge of RxJava/RxKotlin, Coroutines, or Jetpack Compose Familiarity with A/B testing Open-source contributions or active GitHub profile Experience in Agile/Scrum environments Technologies you'll work with Kotlin (Android) REST APIs Git Jetpack Compose Coroutines / RxJava 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 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: Junior-level role in a project building a high-performance, scalable messaging platform for financial institutions, focused on message transport, transformation, routing, and monitoring in a critical environment. The position offers hands-on experience with enterprise financial systems and development toward Java backend or DevOps paths. Work is in a hybrid model with on-call support in a time-sensitive setup. 🗂️ Requirements: Basic experience in Java, Interest in DevOps, Good command of English (spoken and written), Availability for on-call support (rotational shifts), Ability to work in time-sensitive environments, Problem-solving skills, Willingness to work on-site 2 days per week 📃 Skills: Java, Spring, SpringBoot, Kubernetes, OpenShift, Docker, ActiveMQ, IBMMQ, Elasticsearch, PostgreSQL, DB2, ArgoCD, GitOps, Incentage 🏢 Description: Salary: 252 - 350 PLN/ day net + vat (B2B/Civil contract) Remote: elastic hybrid from our office in Gdynia/Gdańsk (2 days per week on-site) Why choose this offer? International working environment High level of autonomy and collaboration within the team Scandinavian organizational culture supporting real work-life balance Opportunity to learn how financial products and markets operate Project You’ll join a project focused on building a robust, scalable, high-performance messaging platform for financial institutions. The system handles message transport, data transformation, routing, validation, sequencing, and monitoring. It’s a critical, high-throughput environment where reliability matters and attention to detail makes a real impact. Expected competences and knowledge Junior level with strong learning mindset): Basic experience in Java (commercial or solid personal projects) Interest in DevOps, with an eagerness to learn Good command of spoken and written English Problem-solving mindset and ability to react quickly to issues Responsibility and readiness to work in time-sensitive environments Openness to collaboration and knowledge sharing (tech + business teams) Availability for on-call support (morning/evening shifts on rotation) Nice to have: Spring Boot Kubernetes / OpenShift Docker Messaging systems (Apache ActiveMQ, IBM MQ) Elasticsearch Databases (PostgreSQL, DB2) GitOps (ArgoCD) Experience with low-code platforms (e.g., Incentage IMS) What you gain: Exposure to real-world, large-scale financial systems Fast learning curve in a complex enterprise environment Supportive team that helps you grow (no “figure it out alone” culture) Development path toward Java backend / DevOps / Site Reliability Engineer Technologies you'll work with Spring Boot Kubernetes / OpenShift Docker Messaging systems (Apache ActiveMQ, IBM MQ) Elasticsearch Databases (PostgreSQL, DB2) GitOps (ArgoCD) Low-code platforms (e.g., Incentage IMS) Client – why choose this particular client from the Jit portfolio? Jit Team is proud to partner with one of the leading European financial groups responsible for the registration, ownership records, and financial settlement of securities traded on financial markets in Norway and recently extended to other European markets. Jit Team has been a strategic partner to our client in the area of software development since 2017 . Over the course of the partnership, Jit Team's dedicated team working for our client has grown from three to over 30 people , who have worked on the modernization of legacy applications, the implementation of new systems, and the development of a private cloud-based platform to host a variety of financial systems . 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: Backend Engineer role focused on developing and scaling a Promoted Offers system in a microservices architecture. The project involves building recommendation mechanisms, campaign effectiveness services, and evolving the system toward Domain Driven Design. Work includes designing and maintaining backend services and APIs in a large-scale e-commerce environment. 🗂️ Requirements: Proficiency in Java, Experience with microservices architecture, Experience in system architecture design, Experience in backend and API development, English level B2+, Availability for on-call duties 📃 Skills: Java, Kotlin, Microservices, DDD, API, GCP, Backend, Architecture 🏢 Description: Stawka: 800-1200 pln/md na B2B Tryb pracy: Praca zdalna z kwartalnymi przyjazdami do Warszawy/Poznania Dlaczego warto wybrać ten projekt? Możliwość pracy w nowoczesnej architekturze mikroserwisowej Współpraca z interdyscyplinarnym zespołem (produkt, dane, UX) Rozwój techniczny w backendzie oraz projektowaniu systemów skalowalnych Projekt Projekt koncentruje się na rozwoju systemu Ofert Promowanych , którego celem jest zwiększenie efektywności sprzedaży oraz widoczności ofert. Zakres prac obejmuje budowę mechanizmów automatycznej rekomendacji ofert o wysokim potencjale sprzedażowym oraz systemów informujących sprzedawców o skuteczności kampanii promocyjnych. Dodatkowo projekt zakłada rozwój funkcjonalności na rynkach międzynarodowych oraz transformację architektury w kierunku Domain Driven Design. Oczekiwana wiedza i kompetencje Znajomość języka programowania Java Doświadczenie w pracy w architekturze mikroserwisowej Umiejętność projektowania i rozwijania architektury systemów Doświadczenie w tworzeniu i utrzymywaniu backendu oraz API Znajomość języka angielskiego na poziomie B2+ Milew widziane Znajomość języka Kotlin Znajomość rozwiązań chmurowych (preferencyjnie GCP) Do Twoich obowiązków należeć będzie Projektowanie, tworzenie, testowanie i utrzymywanie wysokiej jakości kodu dla usług backendowych, API oraz skryptów automatyzacji Projektowanie i rozwój architektury nowych systemów oraz usprawnianie istniejących rozwiązań Praca w architekturze mikroserwisowej Współpraca z zespołami produktowymi, analitykami danych, UX oraz innymi inżynierami w celu doprecyzowania wymagań Koordynowanie zadań w ramach projektów zespołowych Dostępność na on-calle (2 tygodnie co kwartał) Technologie , z którymi będziesz pracować Java Kotlin Mikroserwisy DDD API GCP Klient - dlaczego warto wybrać tego klienta z portfolio Jit? 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. O 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: Senior Frontend Developer role focused on stabilizing and developing a complex cross-platform application built with React and Electron, integrating web, desktop, and embedded environments with hardware devices via proprietary protocols. The position involves architectural contributions, code refactoring, and close collaboration with backend and hardware teams in a technically demanding environment. Remote work with occasional on-site presence in Rzeszów. 🗂️ Requirements: Senior-level experience as Frontend Developer, Advanced knowledge of React, Advanced knowledge of JavaScript, Experience with Electron, Experience integrating applications with hardware or devices, Understanding of cross-platform systems (web, desktop, embedded), Ability to work with low-level or proprietary communication protocols, Experience analyzing and refactoring complex systems, Good understanding of backend architecture and collaboration 📃 Skills: React, JavaScript, TypeScript, Electron, IoT, Embedded, Protocols, Web, Desktop 🏢 Description: Salary: 1100-1150 PLN/day on B2B Remote: remote / hybrid Rzeszów (2 days from the office per week) Why choose this offer? Development and maintenance of a frontend application based on React and JavaScript Support in stabilizing the existing solution and identifying architectural issues Working with system–device communication (client’s proprietary protocol) Development of a desktop application based on Electron Collaboration with backend and hardware/embedded teams Analysis and refactoring of code shared across web, desktop, and embedded environments Contribution to designing the solution architecture in a cross-platform environment Supporting the team in making technical and architectural decisions Project We are looking for an experienced Senior Frontend Developer to support the team in stabilizing and further developing an existing web application that integrates with hardware via a dedicated network protocol. The project is complex in nature—the application communicates with hardware devices, and part of the codebase has been designed in a universal way, enabling its use across web, desktop, and embedded environments. Therefore, a strong understanding of such systems and experience working at the intersection of software and hardware are essential. Expected competences and knowledge Very strong experience as a Frontend Developer (Senior / Lead) Advanced knowledge of React and JavaScript (TypeScript is a plus) Experience working with Electron Experience working with applications integrating with devices / hardware (e.g., IoT, embedded systems, device communication) Understanding of challenges related to cross-platform systems (web / desktop / embedded) Ability to work with more “low-level” system communication logic (proprietary or similar protocols) Experience in analyzing and refactoring existing, complex systems Good understanding of backend (in terms of collaboration and architecture) Ability to work in a highly complex technical environment Technologies you'll work with React JavaScript TypeScript Electron Client – why choose this particular client from the Jit portfolio? Our Client engineers technologies that enable the world of tomorrow to do more with less. They meet the growing need for infrastructure, food supply, energy efficiency and climate-friendly solutions . Their products and services are used in areas such as refrigeration, air conditioning, heating, motor control and mobile machinery. They are also active in the field of renewable energy as well as district heating infrastructure for cities and urban communities. Their innovative engineering dates back to 1933 and today our Client is a world-leader , employing more than 27,000 employees and serving customers in more than 100 countries . They are still privately held by the founding family. 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: Remote B2B role for an experienced Drupal Developer to build and maintain a large-scale, high-traffic content platform supporting marketing and editorial initiatives. The position focuses on developing scalable backend solutions, custom modules, and system integrations within a modern, high-performance architecture. You will collaborate with cross-functional teams to deliver reliable solutions used by millions of users. 🗂️ Requirements: 5+ years of Drupal development experience, Strong knowledge of PHP, Strong knowledge of Drupal APIs, Experience with custom Drupal module development, Experience with HTML5, CSS3, JavaScript, Experience with REST API integrations, Knowledge of Git and modern development workflows, Experience working in Agile/Scrum environments 📃 Skills: Drupal, PHP, HTML5, CSS3, JavaScript, REST, Git, CI/CD 🏢 Description: Salary: 900 - 1300 PLN/day net+vat on B2B Work model: 100% remote Why choose this offer? Work on a high-traffic content and marketing platform used by millions of users Real impact on user-facing campaigns, landing pages, and editorial content Modern development environment with scalable architecture Project You will join a team responsible for developing and maintaining a large-scale content platform built on Drupal, supporting marketing and editorial initiatives. The platform enables the creation of landing pages, campaign content, and editorial materials used across a leading e-commerce ecosystem. Your role will focus on building scalable and high-performance backend solutions, integrating with other systems, and ensuring smooth collaboration with frontend developers, designers, and product teams. Expected competences and knowledge 5+ years of experience in Drupal development Strong knowledge of PHP and Drupal APIs Experience with HTML5, CSS3, JavaScript Experience with custom module development Knowledge of Git and modern development workflows Understanding of REST APIs and system integrations Experience working in Agile/Scrum environments Technologies you'll work with Drupal PHP HTML5, CSS3, JavaScript REST APIs Git CI/CD tools and modern development workflows 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: Hybrid Java Backend Developer role in a fintech environment focused on building and maintaining backend services for complex financial instruments and calculations. The position involves end-to-end feature delivery, including functional frontend contributions and integration with third-party systems. You will work with modern architectures and AI-assisted coding tools in a regulated, data-intensive domain. 🗂️ Requirements: 10+ years of backend or full-stack development experience, Strong proficiency in Java, Experience building REST APIs and microservices, Experience with HTTP-based integrations, Ability to implement and modify frontend features, Experience with SQL and NoSQL databases, Knowledge of CI/CD pipelines and deployment processes, Active use of AI coding tools, Experience in fintech or financial domain 📃 Skills: Java, REST, HTTP, Microservices, SQL, NoSQL, PostgreSQL, MongoDB, Redis, Angular, React, CI/CD, Copilot, Cursor 🏢 Description: Salary: 1100-1400 pln/md Work model: Hybrid from Gdynia/Gdańsk (once per week from the office) Why choose this offer? End‑to‑end ownership with a modern tech stack Stability combined with continuous growth Autonomy and high‑quality collaboration Project We are looking for a Java Backend Developer with a pragmatic, end-to-end mindset - someone who is not afraid to step into frontend territory when needed and treats AI-assisted coding as a natural part of their workflow. You will be working on complex financial instruments and calculations in a fintech environment , building and maintaining backend services while contributing to full product delivery when required. Responsibilities you'll have Design, develop, and maintain robust backend services and APIs in Java Deliver end-to-end features independently - from backend logic to frontend implementation (e.g. generating monthly cash statements, reports, financial calculations) Work with frontend layers (Angular or other frameworks) at a functional level - not as a specialist, but as someone who can get things done Integrate backend systems with frontend and third-party services Participate in code reviews , maintain code quality standards Support CI/CD pipelines and production releases Leverage AI coding tools (agentic coding, vibe coding) as an active part of daily workflow Expected competences and knowledge 10+ years of experience in backend/full-stack development Strong Java experience (core requirement) Experience building REST APIs, microservices, HTTP -based integrations Basic exposure to frontend frameworks (Angular, React, or other) - ability to implement and modify frontend features, not expert-level Solid SQL / NoSQL (PostgreSQL, MongoDB, Redis) Knowledge of CI/CD pipelines and deployment processes Active use of AI coding tools (Copilot, Cursor, or similar) Experience in fintech or financial domain (complex financial instruments, calculations, reporting) Technologies you'll work with Java REST APIs / HTTP Microservices architecture SQL NoSQL PostgreSQL MongoDB Redis Frontend frameworks CI/CD AI coding tools Client – why choose this particular client from the Jit portfolio? Our client is an international financial services organization operating in the capital markets domain, focused on processing and analyzing large volumes of transactional data. The company develops modern data platforms that support trading, operational efficiency, and regulatory reporting. It operates in a fast-paced, highly regulated environment with a strong emphasis on scalability, data quality, and advanced analytics. 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.