Backend Developer

🏢 Summary: The role focuses on developing and maintaining a mobile application for warehouse terminal operations, ensuring seamless integration with backend systems and reliable offline performance. The Mobile Developer builds high-quality features, optimizes scanning workflows, and supports real-time data exchange within the STAR Ecosystem. The position involves close collaboration in an agile squad and contributes to performance, scalability, and operational excellence of logistics processes. 🗂️ Requirements: Proven experience in mobile application development (Android, Kotlin Multiplatform Mobile), Strong programming skills in Kotlin, Familiarity with Jetpack Compose, Koin, SqlDelight, Familiarity with MVI architectural pattern, Experience with REST APIs and authentication flows, Experience with Git and CI/CD pipelines, Fluent English 📃 Skills: Android, Kotlin, KotlinMultiplatform, JetpackCompose, Koin, SqlDelight, MVI, REST, Git, CI/CD, MDM, OfflineFirst, BarcodeScanning 🏢 Description: PLEASE REMEMBER TO CLICK "APPLY" BUTTON AFTER SAVING YOUR PROFILE TO COMPLETE YOUR APPLICATION PROCESS The Mobile Developer in the Terminal Squad plays a critical role in designing, building, and maintaining the mobile application that enables efficient, paperless warehouse operations across the STAR Ecosystem. This role ensures seamless integration with backend systems, delivering a reliable and intuitive user experience for warehouse staff. By developing high quality mobile solutions, the Mobile Developer contributes directly to operational excellence, process digitization, and the continuous improvement of our logistics workflows. Your responsibilities: Develop high-quality mobile features for the Terminal App used in DSV warehouses Optimize performance for scanning workflows, offline usage, and rugged terminal device environments Ensure code is clean, maintainable, testable, and aligned with engineering standards Work closely with backend, middleware, and architecture teams to integrate terminal features with STAR Ecosystem services Contribute to API design, communication flows, and data structures to ensure real-time and reliable data exchange Collaborate with the Terminal Squad, including Product Owner, Scrum Master, QA, UX/UI, and fellow developers Participate in agile ceremonies (planning, refinement, daily stand-up, retrospectives) Contribute to technical discussions, architectural decisions, and grooming sessions Build and maintain automated tests (unit, integration, UI tests) Troubleshoot issues raised from test environments and live operations Support QA in developing and improving test strategies for the mobile environment Ensure the mobile application remains reliable for high-volume terminal operations Support monitoring and alerting of mobile-related incidents Investigate and resolve root causes of operational disruptions Document code, architecture, and operational guidelines Identify technical improvements and propose enhancements for performance, maintainability, and scalability Stay up to date with mobile technologies, frameworks, and industry best practices Our requirements: Proven experience in mobile application development ( Android, Kotlin Multiplatform Mobile ) Strong programming skills in relevant languages ( Kotlin ) Familiarity with Jetpack Compose, Koin, Sql Delight Familiarity with MVI architectural pattern Familiarity with REST APIs, authentication flows, and enterprise integration patterns Experience with version control (Git) and CI/CD pipelines Knowledge of mobile device management (MDM), offline-first architectures, or barcode scanning is a plus Fluent in English What we offer: Employment based on an employment contract, along with a comprehensive benefits package Training and development programs, as well as access to an e-learning platform Onboarding program with the support of a dedicated Buddy Participation in an annual, company-wide integration event A work environment based on Scandinavian organizational culture Opportunities for growth through our internal program Benefits: Sharing the costs of sports activities Private medical care Sharing the costs of foreign language classes Sharing the costs of professional training & courses Life insurance Integration events Corporate gym Corporate sports team Coffee / tea Parking space for employees Extra social benefits Holiday funds Christmas gifts Employee referral program Charity initiatives Bicycle parking Modern and ergonomic office Yoga in the office GBS/GIT/MDEV/114348/635

🏢 Summary: The offer is for a Back End Developer responsible for building and maintaining APIs, backend services, and scalable system architecture within the .NET ecosystem. The role focuses on designing microservices-based solutions, integrating databases and third-party services, and ensuring high performance, security, and reliability. It includes remote work options under a B2B contract. 🗂️ Requirements: Strong knowledge of backend technologies, especially .NET ecosystem, Experience with .NET 8+ and ASP.NET Core, Experience with relational databases (PostgreSQL or MySQL), Experience with NoSQL databases (MongoDB), Experience building RESTful APIs using Swagger / OpenAPI, Experience with Microservices Architecture, Experience with RabbitMQ for message queuing, Experience with Docker and Kubernetes, Experience with Auth0 and JWT-based authentication, Experience with cloud services (AWS, Azure or GCP) 📃 Skills: .NET, ASP.NET, C#, PostgreSQL, MySQL, MongoDB, REST, Swagger, OpenAPI, Microservices, RabbitMQ, Docker, Kubernetes, Auth0, JWT, AWS, Azure, GCP 🏢 Description: Description The Back End Developer will develop and maintain APIs, services, and server-side logic and databases. You'll contribute to system architecture and help scale our platforms. You will ensure high performance and responsiveness of applications, working alongside frontend developers and other team members. Responsibilities Design, build and implement backend services and APIs Design data models and manage database integration Integrate with databases and third-party APIs Implement security and data protection measures Optimize performance and security of systems Requirements Strong knowledge of backend technologies / languages, particularly .NET ecosystem Experience in .NET 8+ (or latest version), including ASP.NET Core for building web APIs and services. Experience with relational databases, such as PostgreSQL, MySQL for structured data, complex queries, and ACID compliant operations Experience with NoSQL databases, such as MongoDB, for handling unstructured or semi-structured data, schema flexibility, and high-throughput scenarios Experience with RESTful APIs for development of robust, secure RESTful services with best practice for APU design, versioning and documentation, using Swagger / Open API Experience in Microservices Architecture, for design, implementation, and management of distributed systems using microservices principles, ensuring loose coupling, scalability, and resilience Experience in Message Queuing:, using RabbitMQ for asynchronous communication, event-driven architecture, and reliable message brokering between services Experience in Containerization and Orchestration, using Kubernetes (K8s) for deploying, scaling, and managing containerized applications in production environments and Docker for containerization Experience in Authentication, using Auth0 for identity management, JWT-based authentication Experience in Cloud Services, such as AQS, Azure, GC Nice to have Experience in Rabbit MQ Middleware Prior experience in the EdTech domain (e-learning platforms, digital classrooms, LMS) Knowledge of learning science, instructional design, or accessibility standards (e.g., WCAG) Familiarity with tools like Moodle, Canvas, Zoom SDK, or Google Classroom integration Working conditions Partly / fully remote B2B contract

🏢 Summary: Backend Developer role focused on designing and building scalable, cloud-based applications using Java and Spring Boot in a microservices architecture. The position involves developing and deploying distributed, event-driven services on Azure using modern containerization and API technologies. The offer emphasizes building reliable, high-quality backend systems with up-to-date cloud-native practices. 🗂️ Requirements: Strong Java development experience, Experience with Spring Boot, Experience with microservices architecture, Experience with cloud-native applications, Familiarity with Azure, Knowledge of Kafka or similar messaging systems, Understanding of GraphQL or REST APIs, Experience with Docker, Experience with Kubernetes 📃 Skills: Java, Spring, SpringBoot, Microservices, Azure, Kafka, GraphQL, REST, Docker, Kubernetes 🏢 Description: We are seeking a talented Backend Developer to join our team, contributing to the design and development of modern, cloud-based applications. The role focuses on building scalable and maintainable services using up-to-date technologies and best practices. Key Responsibilities: Develop and maintain backend services using Java and Spring Boot . Build and support microservices solutions for distributed systems. Work with cloud platforms such as Azure , including event-driven architectures. Implement and consume APIs using GraphQL or REST. Package and deploy applications using Docker and Kubernetes . Collaborate with team members to deliver reliable, high-quality software. Required Skills & Experience: Strong background in Java development with Spring Boot . Experience with microservices and cloud-native applications. Familiarity with Azure , Kafka , or similar messaging/event systems. Understanding of API design ( GraphQL /REST). Practical experience with containerization ( Docker , Kubernetes ). Nice to Have: Knowledge of CI/CD practices and automated deployments. Experience with monitoring, logging, or observability in distributed systems.

🏢 Summary: The role involves developing and maintaining scalable backend services for business-critical applications using Java within an agile environment. The position focuses on building RESTful APIs, implementing persistence layers, and ensuring system quality and stability. The developer collaborates on code reviews, debugging, and continuous improvement of backend solutions. 🗂️ Requirements: Strong experience with Java 17+, Hands-on experience with Spring, Hands-on experience with Spring Boot, Knowledge of Hibernate and ORM concepts, Experience with PostgreSQL, Experience with Git version control platforms, Strong debugging skills, Experience in agile development environments 📃 Skills: Java, Spring, SpringBoot, Hibernate, PostgreSQL, REST, Git, ORM 🏢 Description: Backend Developer (Java) We are looking for a Backend Developer to join a development team responsible for building and maintaining backend services for business-critical applications. The role focuses on developing scalable, maintainable solutions and contributing to the overall quality and stability of the system within an agile setup. Responsibilities: Develop and maintain backend services using Java 17+ Design and implement RESTful APIs with Spring and Spring Boot Work with relational databases, including schema design and query optimization in PostgreSQL Implement persistence layers using Hibernate Debug, troubleshoot, and resolve backend issues Collaborate with the team using a GitHub-like platform, including code reviews and version control Participate in agile ceremonies and contribute to continuous improvement Requirements: Strong experience with Java 17+ Hands-on experience with Spring and Spring Boot Knowledge of Hibernate and ORM concepts Experience working with PostgreSQL Familiarity with GitHub-like platforms and team workflows Strong debugging and problem-solving skills Experience working in agile development environments

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

🏢 Summary: Senior Backend Developer role focused on designing and developing scalable backend services in Python for a global technology platform supporting digital services management and quotation processes. The position involves building REST APIs, integrating external systems, implementing business logic, and ensuring high performance and code quality. The role offers real impact on system architecture and collaboration within an international team. 🗂️ Requirements: Minimum 7 years of backend development experience in Python, Strong knowledge of Python frameworks (FastAPI, Flask, Django, NumPy, Pandas), Experience in designing and implementing REST API, Experience in system integrations and working with external services, Knowledge of software development best practices (testing, Git, code review, CI/CD), Experience in building scalable, production-ready backend solutions, Experience with databases and business data processing, Experience working in service-oriented architecture environment, Very good communication skills, Good command of English 📃 Skills: Python, FastAPI, Flask, Django, NumPy, Pandas, REST, API, Git, CI/CD, C#, C++, AWS, OpenAPI, Swagger, Pydantic, OR-Tools, PuLP 🏢 Description: Dołącz do międzynarodowego zespołu rozwijającego nowoczesną platformę technologiczną wykorzystywaną przez globalne organizacje do zarządzania usługami cyfrowymi i procesami ofertowania. Poszukujemy doświadczonego Backend Developera, który będzie miał realny wpływ na rozwój kluczowych komponentów systemu odpowiedzialnych za integracje, przetwarzanie danych oraz generowanie ofert dla klientów na całym świecie. Zakres obowiązków Projektowanie, rozwój i utrzymanie usług backendowych w Pythonie Tworzenie oraz rozwijanie REST API wykorzystywanych przez aplikacje i systemy zewnętrzne Implementacja logiki biznesowej związanej z procesami ofertowania i integracjami partnerskimi Integracja zewnętrznych źródeł danych oraz systemów dostawców Współpraca przy rozwoju istniejącej platformy opartej o technologie Python i C# Dbanie o jakość kodu poprzez testy jednostkowe, integracyjne oraz code review Refaktoryzacja i optymalizacja istniejących rozwiązań pod kątem wydajności i skalowalności Tworzenie i utrzymywanie dokumentacji technicznej oraz kontraktów API Współpraca z zespołami biznesowymi i produktowymi przy analizie wymagań oraz projektowaniu rozwiązań Udział w planowaniu prac, przeglądach sprintów oraz identyfikowaniu ryzyk projektowych Wymagania Minimum 7 lat doświadczenia w tworzeniu aplikacji backendowych w Pythonie Znajomość frameworków/bibliotek (np. FastAPI, Flask, Django, NumPy/Pandas) Bardzo dobra znajomość projektowania i implementacji REST API Doświadczenie w integracji systemów i pracy z zewnętrznymi usługami Znajomość dobrych praktyk programistycznych, takich jak testowanie, Git, code review oraz CI/CD Umiejętność tworzenia skalowalnych i produkcyjnych rozwiązań backendowych Doświadczenie w pracy z bazami danych oraz przetwarzaniem danych biznesowych Umiejętność pracy w środowisku opartym o architekturę usług i integracji Bardzo dobre umiejętności komunikacyjne oraz współpraca z interesariuszami biznesowymi Samodzielność, inicjatywa oraz poczucie odpowiedzialności za dostarczane rozwiązania Dobra znajomość języka angielskiego Mile widziane Znajomość C# lub/i C++ Doświadczenie z usługami chmurowymi AWS Doświadczenie z OpenAPI / Swagger oraz Pydantic Znajomość narzędzi do optymalizacji i rozwiązywania problemów (OR-Tools, PuLP lub podobne) Doświadczenie w środowisku SaaS, telekomunikacyjnym lub logistycznym Oferujemy Pracę przy rozwoju nowoczesnego produktu o globalnym zasięgu Możliwość realnego wpływu na architekturę i kierunek rozwoju platformy Współpracę z międzynarodowym zespołem specjalistów Dostęp do nowoczesnych technologii i dużych projektów integracyjnych Atrakcyjne wynagrodzenie oraz stabilne zatrudnienie Program emerytalny Hybrydowy model pracy Możliwość dalszego rozwoju technicznego i udziału w strategicznych inicjatywach biznesowych

🏢 Summary: Oferta dotyczy roli Backend Developera odpowiedzialnego za rozwój i utrzymanie kluczowych usług backendowych w Pythonie w globalnej platformie do zarządzania usługami cyfrowymi i procesami ofertowania. Stanowisko obejmuje projektowanie REST API, integracje z systemami zewnętrznymi oraz rozwój skalowalnych rozwiązań przetwarzających dane biznesowe. Rola daje realny wpływ na architekturę systemu oraz współpracę z międzynarodowym zespołem przy dużych projektach integracyjnych. 🗂️ Requirements: Minimum 7 lat doświadczenia w backendzie Python, Znajomość FastAPI, Flask lub Django, Bardzo dobra znajomość projektowania i implementacji REST API, Doświadczenie w integracji systemów i pracy z zewnętrznymi usługami, Znajomość testowania, Git, code review oraz CI/CD, Doświadczenie z bazami danych i przetwarzaniem danych biznesowych, Umiejętność tworzenia skalowalnych rozwiązań produkcyjnych, Doświadczenie w architekturze usług i integracjach, Bardzo dobra znajomość języka angielskiego 📃 Skills: Python, FastAPI, Flask, Django, NumPy, Pandas, REST, Git, CI/CD, SQL, C#, C++, AWS, OpenAPI, Swagger, Pydantic, OR-Tools, PuLP 🏢 Description: Dołącz do międzynarodowego zespołu rozwijającego nowoczesną platformę technologiczną wykorzystywaną przez globalne organizacje do zarządzania usługami cyfrowymi i procesami ofertowania. Poszukujemy doświadczonego Backend Developera, który będzie miał realny wpływ na rozwój kluczowych komponentów systemu odpowiedzialnych za integracje, przetwarzanie danych oraz generowanie ofert dla klientów na całym świecie. Zakres obowiązków Projektowanie, rozwój i utrzymanie usług backendowych w Pythonie Tworzenie oraz rozwijanie REST API wykorzystywanych przez aplikacje i systemy zewnętrzne Implementacja logiki biznesowej związanej z procesami ofertowania i integracjami partnerskimi Integracja zewnętrznych źródeł danych oraz systemów dostawców Współpraca przy rozwoju istniejącej platformy opartej o technologie Python i C# Dbanie o jakość kodu poprzez testy jednostkowe, integracyjne oraz code review Refaktoryzacja i optymalizacja istniejących rozwiązań pod kątem wydajności i skalowalności Tworzenie i utrzymywanie dokumentacji technicznej oraz kontraktów API Współpraca z zespołami biznesowymi i produktowymi przy analizie wymagań oraz projektowaniu rozwiązań Udział w planowaniu prac, przeglądach sprintów oraz identyfikowaniu ryzyk projektowych Wymagania Minimum 7 lat doświadczenia w tworzeniu aplikacji backendowych w Pythonie Znajomość frameworków/bibliotek (np. FastAPI, Flask, Django, NumPy/Pandas) Bardzo dobra znajomość projektowania i implementacji REST API Doświadczenie w integracji systemów i pracy z zewnętrznymi usługami Znajomość dobrych praktyk programistycznych, takich jak testowanie, Git, code review oraz CI/CD Umiejętność tworzenia skalowalnych i produkcyjnych rozwiązań backendowych Doświadczenie w pracy z bazami danych oraz przetwarzaniem danych biznesowych Umiejętność pracy w środowisku opartym o architekturę usług i integracji Bardzo dobre umiejętności komunikacyjne oraz współpraca z interesariuszami biznesowymi Samodzielność, inicjatywa oraz poczucie odpowiedzialności za dostarczane rozwiązania Dobra znajomość języka angielskiego Mile widziane Znajomość C# lub/i C++ Doświadczenie z usługami chmurowymi AWS Doświadczenie z OpenAPI / Swagger oraz Pydantic Znajomość narzędzi do optymalizacji i rozwiązywania problemów (OR-Tools, PuLP lub podobne) Doświadczenie w środowisku SaaS, telekomunikacyjnym lub logistycznym Oferujemy Pracę przy rozwoju nowoczesnego produktu o globalnym zasięgu Możliwość realnego wpływu na architekturę i kierunek rozwoju platformy Współpracę z międzynarodowym zespołem specjalistów Dostęp do nowoczesnych technologii i dużych projektów integracyjnych Atrakcyjne wynagrodzenie oraz stabilne zatrudnienie Program emerytalny Hybrydowy model pracy Możliwość dalszego rozwoju technicznego i udziału w strategicznych inicjatywach biznesowych

🏢 Summary: Frontend Developer role focused on rebuilding a core logistics operating system into a microservices-based architecture by implementing modern, scalable, and maintainable user interfaces. The position involves developing reusable frontend foundations, refactoring legacy applications, and ensuring high performance, accessibility, and quality standards. The role requires close collaboration with cross-functional teams to deliver enterprise-grade frontend solutions. 🗂️ Requirements: 5+ years of web frontend development experience in enterprise-scale environments, Excellent knowledge of HTML, CSS, JavaScript, Experience with Angular 19+ and TypeScript, Experience with SCSS, Experience with CI/CD tools, Knowledge of microfrontend architecture and composition patterns, Experience building and maintaining Design Systems and shared libraries, Strong browser debugging and troubleshooting skills, Strong focus on testing, performance, and accessibility best practices, Good English skills (spoken and written), Computer science degree or equivalent 📃 Skills: HTML, CSS, JavaScript, Angular, TypeScript, SCSS, Jenkins, AWS, CI/CD, Microfrontends, DesignSystems 🏢 Description: Job Overview We’re looking for a Frontend Developer to join our transformation program, where we’re rebuilding our core logistics operating system into a microservices-based architecture—right within our IT Germany team. Your job? Implement the diverse user interfaces needed by our core logistic operating system, collaborating with a diverse team across our IT frontend chapter. If you love building products that truly make a difference, this could be a great fit. Our team focuses on developing and improving applications that deliver real value to both our parcel logistics colleagues and our customers. Main Responsibilities - Collaborate with UX/UI designers to implement modern, responsive, and accessible user interfaces, integrated with APIs and backend systems; - Build and maintain reusable frontend foundations (shared libraries, patterns, and components) to support multiple applications and teams; - Rebuild or refactor legacy frontends using modern frameworks and platforms, ensuring long-term maintainability; - Define and apply frontend standards and best practices (coding guidelines, testing approach, and documentation) to ensure consistent quality; - Optimize applications for maximum speed, scalability, and reliability (including performance tuning and bundle optimization); - Work closely with backend developers, QA, DevOps, product owners, and business analysts to deliver stable and user-centered solutions. Key Requirements - 5+ years’ experience in web frontend development, ideally in enterprise-scale environments; - Excellent knowledge of browser troubleshooting and debugging practices and techniques; - Excellent knowledge of HTML, CSS, JavaScript; - Experience with Angular 19+, TypeScript, SCSS, and CI/CD tools (Jenkins, AWS Cloud); - Experience building and evolving Design Systems and internal shareable libraries, including documentation and adoption support; - Knowledge of microfrontend architecture and composition patterns, with attention to dependency management and compatibility; - Strong focus on quality (testing mindset, performance awareness, and accessibility best practices); - Sense of ownership and pride in your performance and impact on company’s success; - Good English skills both spoken and written; - Computer science degree or equivalent. Nice to Have - Experience with Agile methodologies and collaboration tools;- Familiarity with backend development concepts;- Interest in continuous learning and professional development.

🏢 Summary: Entry-level Backend Engineer role focused on supporting the development of backend services and REST APIs under senior guidance. The position involves contributing to production systems, writing tested and maintainable code, and collaborating within a cross-functional engineering team. Ideal for candidates with foundational Java experience seeking hands-on experience in scalable and secure systems. 🗂️ Requirements: Bachelor's degree in Computer Science or related field (or currently pursuing), Minimum 0.5 years of Java experience, Practical experience with RESTful APIs, Ability to work with HTTP methods, status codes, and JSON, Experience writing SQL queries (SELECT, JOIN, WHERE, GROUP BY) or using ORM, Basic understanding of SQL and NoSQL differences, Knowledge of data structures and algorithms, Ability to use Git in a team environment (branching, pull requests, merge conflicts), Experience writing unit tests, Experience contributing code to production through review and deployment process 📃 Skills: Java, REST, HTTP, JSON, SQL, NoSQL, ORM, Git, JUnit, Pytest, Jest, CI, Algorithms, DataStructures, APIs, Testing 🏢 Description: (5190) About This Role You will be a part of the Engineering team and reports to our Manager, Engineering. You will support the development of backend services and APIs that power customer’s products. Working under close guidance from experienced engineers, you will gain hands-on experience contributing to real-world systems while learning best practices in software development, scalability, and security. Key Responsibilities Support the development of backend services and APIs under direct supervision of senior engineers Assist with writing clean, maintainable, and well-documented code following team standards Help debug, test, and troubleshoot backend systems and services Contribute to small tasks or components within larger projects Collaborate with cross-functional teams including Frontend, Product, and DevOps Participate in code reviews and apply feedback to improve technical skills Assist in writing unit tests and validating functionality Document technical processes and development work Required Qualifications Bachelor's degree in Computer Science or a related field; Currently pursuing is also an option Strong theoretical knowledge of Java, at least 0.5 years of experience Practical experience building and consuming RESTful APIs — HTTP methods, status codes, JSON, request/response handling, basic error handling. Working knowledge of databases — has written real SQL queries (SELECT, JOIN, WHERE, GROUP BY) or used an ORM in production code; understands the difference between SQL and NoSQL at a basic level. Solid understanding of data structures and algorithms — arrays, hash maps, trees, basic Big-O analysis — sufficient to discuss simple coding problems and reason about correctness. Comfortable with Git in a team setting — branching, pull requests, code review, addressing feedback, resolving merge conflicts; has worked in a shared repository with at least one other developer. Hands-on experience writing unit tests for their own code (pytest, JUnit, Jest, or equivalent), and basic familiarity with how testing fits into a CI pipeline. Demonstrated ability to ship code to production — even small features or bug fixes — through a real review and deployment process; ability to clearly describe what they built, how it was reviewed, and how it was tested. Genuine interest in cryptocurrency, blockchain, or Web3 (self-taught is fine — owning crypto, reading, side projects, hackathons) and willingness to learn the regulated FinTech context; English level: Upper-intermediate or higher, sufficient for daily team communication and code review discussions. Bonus: exposure to Linux / command line, Docker basics, message queues (Kafka, RabbitMQ), cloud platforms (AWS, GCP), open-source contributions, hackathon participation, or an active public GitHub portfolio.

🏢 Summary: Senior Backend Developer role for a greenfield maritime logistics system, focused on building backend services and integrations for vessel and port administration processes. The position involves designing secure, reliable, and scalable APIs and system integrations within a modern backend architecture (Java or .NET). The project is international, integration-heavy, and allows real influence on technology stack and architecture decisions. 🗂️ Requirements: Minimum 3 years commercial experience as Backend Developer, Senior-level expertise in Java or .NET, Participation in at least 3 international projects, Participation in at least 2 maritime domain projects, Experience building integration-heavy systems, Experience working with REST APIs and system integrations, Strong knowledge of security, scalability, performance, maintainability, Good command of English, Ukrainian language proficiency at minimum B2 level 📃 Skills: Java, .NET, REST, APIs, Microservices, Event-driven, Azure, AWS, GCP, Docker, Kubernetes, CI/CD, Security, Scalability, Performance 🏢 Description: Project Description For one of our clients participating in a public tender, we are looking for Senior Backend Developers who, together with a Frontend React Developer, will form a recommended delivery team. The project involves building a greenfield solution in the maritime / port logistics domain, supporting processes related to vessel visits and integrations with various maritime administrations and port-related systems. The system will be developed using a modern backend services architecture, with a strong focus on integrations, reliability, data security, and operational stability. The backend technology stack will be recommended by the vendor (preferred Java or .NET). Responsibilities •     Design and develop backend services for a maritime / logistics / vessel management system •     Develop backend services and APIs (REST / system integrations) •     Participate in business and technical requirements analysis •     Implement integrations with external maritime and port administration systems •     Design and optimize data models and business logic •     Work in an international environment and collaborate closely with the client and project team •     Ensure code quality (code reviews, testing, standards, documentation) •     Support the definition of the technology stack and solution architecture Requirements (Must Have) •     Minimum 3 years of commercial experience as a Backend Developer •     Senior-level expertise in Java or .NET •     Participation in at least 3 international projects •     Participation in at least 2 maritime domain projects (e.g., ships, ports, vessel visits handling, harbor logistics, maritime administration systems, shipping) •     Experience in building integration-heavy systems and working with APIs •     Strong knowledge of backend engineering topics: security, scalability, performance, maintainability •     Good command of English (international environment) •     Ukrainian language skills at minimum B2 level Nice to Have •     Experience in public sector projects or mission-critical systems •     Knowledge of microservices and/or event-driven architecture •     Cloud experience (Azure / AWS / GCP) •     CI/CD, Docker/Kubernetes •     Experience working with systems involving multiple integrations and complex business processes •     Knowledge of logistics and transportation domain We Offer / Engagement Conditions •     Work on a high-impact greenfield project •     Long-term cooperation •     100% remote work model •     Real influence on technology stack selection and system architecture •     Collaboration in an international environment and participation in a maritime industry project