MongoDB Engineer / Administrator

🏢 Summary: Senior Backend Developer role focused on designing, developing and maintaining scalable backend systems and APIs within a global, technology-driven environment. The position involves shaping system architecture, ensuring quality and performance, and contributing to high-impact digital products supporting international business operations. Hybrid work model with strong influence on technical decisions and engineering standards. 🗂️ Requirements: Minimum 8 years of experience in Java development, Experience in designing distributed systems, Experience with microservices architecture, Practical experience in designing and developing REST APIs, Knowledge of relational or NoSQL databases, Experience with cloud environments, Experience with containerization, Strong knowledge of design patterns, Experience in testing and code review practices, Very good command of English 📃 Skills: Java, REST, PostgreSQL, MySQL, MongoDB, GCP, Docker, Kubernetes, Microservices, SQL, NoSQL 🏢 Description: Klient : Międzynarodowa firma działająca w branży agrobiznesowej i technologicznej, która rozwija zaawansowane rozwiązania cyfrowe wspierające globalne łańcuchy dostaw w obszarze żywności, pasz i paliw. Firma wykorzystuje dane oraz nowoczesne technologie, aby optymalizować procesy biznesowe na dużą skalę i budować przewagę konkurencyjną w dynamicznym, międzynarodowym środowisku. Dołącz do międzynarodowego zespołu technologicznego pracującego nad rozwojem nowoczesnych produktów cyfrowych, które mają realny wpływ na globalny biznes i procesy operacyjne. Będziesz odpowiadać za projektowanie, rozwój i utrzymanie wydajnych oraz skalowalnych systemów backendowych. 🛠 Stack technologiczny: Java, Microservices, REST API, Docker, Kubernetes, GCP, PostgreSQL, MySQL, MongoDB. Lokalizacja biura: Warszawa. Model pracy: hybrydowy (2 dni z biura, 3 dni zdalnie). Zakres obowiązków: Projektowanie oraz rozwój skalowalnych systemów backendowych i API Współodpowiedzialność za jakość, wydajność i bezpieczeństwo rozwiązań Współpraca z zespołami produktowymi, analitycznymi oraz innymi zespołami technologicznymi w środowisku międzynarodowym Identyfikowanie i rozwiązywanie złożonych problemów technicznych Przeglądy kodu oraz aktywne podnoszenie jakości wytwarzanego oprogramowania Mentoring i wsparcie mniej doświadczonych członków zespołu Wpływ na kierunek rozwoju architektury oraz dobór narzędzi i technologii Udział w podejmowaniu decyzji technologicznych oraz współtworzenie standardów inżynierskich Szukamy osoby, która: myśli systemowo i lubi rozwiązywać złożone problemy chce mieć wpływ na architekturę i jakość rozwiązań dobrze odnajduje się w środowisku międzynarodowym potrafi dzielić się wiedzą i wspierać innych wykazuje inicjatywę i poczucie odpowiedzialności za dostarczane rozwiązania Główne wymagania: Minimum 8 lat doświadczenia w tworzeniu oprogramowania w języku Java Doświadczenie w projektowaniu i budowie systemów rozproszonych oraz architektury mikroserwisowej Praktyczna znajomość projektowania i rozwijania REST API Znajomość baz danych (np. PostgreSQL, MySQL, MongoDB) Znajomość środowisk chmurowych (mile widziane doświadczenie z GCP ) Doświadczenie w pracy z konteneryzacją (Docker, Kubernetes) Ugruntowana znajomość wzorców projektowych oraz dobrych praktyk inżynierskich Doświadczenie w zapewnianiu jakości (testy, code review, dobre praktyki) Bardzo dobra znajomość języka angielskiego (codzienna praca w środowisku międzynarodowym) Mile widziane: Doświadczenie z Java 21+ Doświadczenie w pracy z innymi językami (np. .NET, Python, Node.js) Doświadczenie w pracy z systemami o dużej skali i wysokiej dostępności Firma oferuje: Stabilną, długofalową współpracę na podstawie umowy o prace (KUP) Udział w projektach o globalnym zasięgu i realnym wpływie na biznes Pracę w doświadczonym, międzynarodowym zespole Możliwość wpływu na architekturę i standardy technologiczne Możliwość rozwoju technicznego i mentoringowego Kulturę organizacyjną oparta na jakości, współpracy i ciągłym doskonaleniu Pracę w modelu hybrydowym (2 dni z biura, 3 dni zdalnie) Elastyczne godziny pracy Atrakcyjny pakiet benefitów (prywatna opieka medyczna, karta Multisport, ubezpieczenie na życie)

🏢 Summary: 100% remote B2B opportunity to lead a development team in building and maintaining scalable applications within an agile environment. The role combines hands-on full-stack development with strategic technical leadership, focusing on robust system architecture and faster delivery of new solutions. Long-term cooperation with a two-stage recruitment process including a technical test. 🗂️ Requirements: Proficiency in .NET, Proficiency in C#, Experience in full-stack development, Experience with front-end technologies, Experience with document-based databases, Knowledge of event-based messaging frameworks, Experience with cloud services, Experience with containerization, Ability to lead development teams, Experience working in agile environment 📃 Skills: .NET, C#, Angular, MongoDB, Cloud, Docker, Microservices, REST, Git 🏢 Description: Work model: 100% remote Start date: Flexible Rate: up to 215 PLN/h netto + VAT Contract : B2B, long-term cooperation (12-month contract up front + extensions) Recruitment process : 2 stages, including a technical test estimated to take 2-4 hours. Summary: The role focuses on leading the development team to create new solutions and maintain systems within an agile environment, emphasizing the importance of robust applications and strategic direction. Main Responsibilities: Lead the development team in creating and maintaining applications. Adopt wider technology practices and address the speed of new application delivery. Engage in hands-on development while guiding the strategic direction of projects. Collaborate with teams to gather specifications and perform technical analysis. Navigate complex systems and ensure they are built to scale. Manage developer quality and capacity amidst organizational constraints. Key Requirements: Proficient in .NET and C#. Experience with full-stack development, including front-end technologies. Familiarity with document-based databases. Knowledge of event-based messaging frameworks. Experience with cloud services and containerization. Nice to Have: Prior experience in the banking or financial services sector. Familiarity with Angular or other modern front-end frameworks. Experience with MongoDB or similar environments. Other Details: Environment: .NET, C#, Angular, MongoDB, moving towards cloud solutions. Team Structure: Full Stack Developers working closely with Business Analysts.

🏢 Summary: Remote position for an experienced full‑stack developer responsible for building new APIs, maintaining and upgrading backend and frontend applications, and improving product quality. The role involves bug fixing and continuous enhancement of existing systems using modern Java and JavaScript technologies. Salary depends on experience (3+ years). 🗂️ Requirements: Minimum 3 years of experience with Java, Minimum 3 years of experience with AWS, Minimum 3 years of experience with MongoDB, Minimum 3 years of experience with PostgreSQL, Minimum 3 years of experience with React.js, Minimum 3 years of experience with Spring Boot 📃 Skills: Java, AWS, MongoDB, PostgreSQL, React, SpringBoot, APIs 🏢 Description: Location: 100% remote Salary: 105–175 PLN net/h ( depending on experience, we are looking for candidates with 3 to +8 years of experience ) Tasks Development of new APIs to support clients Fixing bugs Upgrading and maintaining backend and frontend applications Looking for opportunities to improve the product Requirements Java – minimum 3 years of experience AWS – minimum 3 years of experience MongoDB – minimum 3 years of experience PostgreSQL – minimum 3 years of experience React.js – minimum 3 years of experience Spring Boot – minimum 3 years of experience Offer Multisport card Private healthcare Access to an e‑learning platform Group life insurance

🏢 Summary: Long-term remote B2B contract for a technical leader responsible for guiding a development team in building and maintaining scalable applications within an agile environment. The role combines hands-on .NET development with strategic oversight, technical analysis, and quality management. Focus is on delivering robust, cloud-oriented solutions and improving application delivery speed. 🗂️ Requirements: Proficiency in .NET and C#, Experience in full-stack development, Experience with front-end technologies, Experience with document-based databases, Knowledge of event-based messaging frameworks, Experience with cloud services, Experience with containerization, Ability to lead development team, Experience in building scalable systems 📃 Skills: .NET, C#, Angular, MongoDB, Cloud, Docker, Messaging, SQL 🏢 Description: Work model: 100% remote Start date: 30.06.2026 Rate: 160-180 PLN/h netto + VAT Contract : B2B, long-term cooperation (12-month contract up front + extensions) Recruitment process : 2 stages, including a technical test estimated to take 2-4 hours. Summary: The role focuses on leading the development team to create new solutions and maintain systems within an agile environment, emphasizing the importance of robust applications and strategic direction. Main Responsibilities: Lead the development team in creating and maintaining applications. Adopt wider technology practices and address the speed of new application delivery. Engage in hands-on development while guiding the strategic direction of projects. Collaborate with teams to gather specifications and perform technical analysis. Navigate complex systems and ensure they are built to scale. Manage developer quality and capacity amidst organizational constraints. Key Requirements: Proficient in .NET and C#. Experience with full-stack development, including front-end technologies. Familiarity with document-based databases. Knowledge of event-based messaging frameworks. Experience with cloud services and containerization. Nice to Have: Prior experience in the banking or financial services sector. Familiarity with Angular or other modern front-end frameworks. Experience with MongoDB or similar environments. Other Details: Environment: .NET, C#, Angular, MongoDB, moving towards cloud solutions. Team Structure: Full Stack Developers working closely with Business Analysts.

🏢 Summary: Technical leadership role focused on driving the development and maintenance of scalable .NET-based applications in an agile environment. The position combines hands-on full-stack development with strategic oversight of architecture, quality, and delivery speed. It involves close collaboration with cross-functional teams to build robust, cloud-oriented solutions. 🗂️ Requirements: Proficiency in .NET and C#, Experience in full-stack development, Knowledge of front-end technologies, Experience with document-based databases, Knowledge of event-based messaging frameworks, Experience with cloud services, Experience with containerization, Ability to design scalable systems, Experience leading development teams 📃 Skills: .NET, C#, Angular, MongoDB, Cloud, Docker, Kubernetes, Microservices, REST, Git 🏢 Description: Work model: 100% remote Start date: 30.06.2026 Rate: 160-180 PLN/h netto + VAT Contract : B2B, long-term cooperation (12-month contract up front + extensions) Recruitment process : 2 stages, including a technical test estimated to take 2-4 hours. Summary: The role focuses on leading the development team to create new solutions and maintain systems within an agile environment, emphasizing the importance of robust applications and strategic direction. Main Responsibilities: Lead the development team in creating and maintaining applications. Adopt wider technology practices and address the speed of new application delivery. Engage in hands-on development while guiding the strategic direction of projects. Collaborate with teams to gather specifications and perform technical analysis. Navigate complex systems and ensure they are built to scale. Manage developer quality and capacity amidst organizational constraints. Key Requirements: Proficient in .NET and C#. Experience with full-stack development, including front-end technologies. Familiarity with document-based databases. Knowledge of event-based messaging frameworks. Experience with cloud services and containerization. Nice to Have: Prior experience in the banking or financial services sector. Familiarity with Angular or other modern front-end frameworks. Experience with MongoDB or similar environments. Other Details: Environment: .NET, C#, Angular, MongoDB, moving towards cloud solutions. Team Structure: Full Stack Developers working closely with Business Analysts.

🏢 Summary: Full-Stack / Backend Developer role focused on building and maintaining scalable applications and REST APIs that support client products. The position involves developing new integrations, enhancing existing backend and frontend systems, and improving platform performance and reliability. You will contribute to architecture improvements and work within a cloud-based environment. 🗂️ Requirements: Minimum 3 years commercial experience, Experience with Java, Experience with Spring Boot, Experience with AWS, Experience with MongoDB, Experience with PostgreSQL, Experience with React.js, Experience designing REST APIs, Knowledge of backend architecture, Experience with cloud environments, Understanding of clean code principles, Experience working in Agile environment 📃 Skills: Java, SpringBoot, AWS, MongoDB, PostgreSQL, React, REST, Agile, Cloud, Architecture 🏢 Description: We are looking for an experienced Full-Stack / Backend Developer to join our team and help build scalable applications and APIs supporting our clients’ products. You will work on both backend and frontend solutions, contributing to product development, system improvements, and ongoing platform stability. Your Responsibilities Develop new APIs to support client integrations and business features. Maintain and enhance existing backend and frontend applications. Fix bugs and improve application performance and reliability. Upgrade and support operational aspects of the platform. Identify opportunities to improve product quality, architecture, and development processes. Collaborate with developers, product teams, and stakeholders to deliver high-quality solutions. Participate in code reviews and contribute to best engineering practices. Required Skills Minimum 3 years of commercial experience with: Java Spring Boot AWS MongoDB PostgreSQL React.js Experience designing and developing REST APIs. Knowledge of backend architecture and modern web applications. Experience working with cloud-based environments (AWS). Understanding of software development best practices and clean code principles. Ability to work in an Agile development environment.

🏢 Summary: Full Stack Developer role focused on building and maintaining an in-house electronic trading application, including real-time data visualization and position management. The team follows a DevOps approach and is currently migrating the system from on-premise infrastructure to GCP. Responsibilities include feature development, automated testing, CI/CD, and production ownership. 🗂️ Requirements: Minimum 4 years of Java development experience, Hands-on experience with GCP, Experience with Terraform, Experience with TDD, Experience with CI/CD pipelines, Proficiency with Git, Proficiency with Gradle, Proficiency with TeamCity, Proficiency with GitHub, Experience with Apache Kafka, Experience with Kafka Streams 📃 Skills: Java, GCP, Terraform, TDD, CI, CD, Git, Gradle, TeamCity, GitHub, Kafka, KafkaStreams, REST, MongoDB, JVM 🏢 Description: You will join a global team of Full Stack Developers working on an in-house application supporting electronic trading. The team works with modern technologies, a DevOps approach, and close collaboration with the business. Currently, the team is focused on migrating the application from an on-premise environment to GCP. The application is responsible for position management and real-time data visualization. You and your teammates are responsible for all aspects of delivering software to your users: Development of new features. Speaking to the product owner (traders) to understand new feature requirements. Automating regression testing of new software. Frequent deployment of multiple software packages to production. Production availability – we collectively build and own the service. Peer review of colleague’s changes. Speak up and help shape how we do things better. Required skills and experience: Expertise of Java development, with at least 4 years of experience Exposure to cloud technologies such as GCP and Terraform . Familiar with TDD, continuous integration and delivery environment using Git/Gradle/Teamcity/Github Experience with Apache Kafka and Kafka Streams Fluent English (min. B2) Nice to have skills and experience: Experience with REST, messaging technologies and JVM performance tuning. MongoDB An interest in Equity or Equity Derivatives trading business Trading or Risk analysis systems domain knowledge A passion for software development outside of work through involvement in open source, working groups, meetups etc.

🏢 Summary: B2B contract for a Senior Python Backend Developer to design, build, and maintain scalable backend systems in a fully remote environment (Poland-based). The role focuses on developing production-grade services and APIs using Python and FastAPI, with end-to-end ownership of features. You will contribute to microservices architecture and asynchronous processing solutions. 🗂️ Requirements: Minimum 5 years of commercial experience, Strong experience with Python, Strong experience with FastAPI, Experience building backend systems and APIs, Experience with RESTful services, Experience with microservices architecture, Experience with messaging or queue systems, Hands-on experience in production environments, Ability to work independently, Ability to manage tasks end-to-end 📃 Skills: Python, FastAPI, REST, Microservices, API, Queues, Messaging, Async, Backend 🏢 Description: Location: 100% Remote (candidates must be located in Poland) Start Date: ASAP /  2 weeks Contract Type: B2B via Experis About the Role We are looking for an experienced Python Backend Developer to join our team and contribute to building and maintaining scalable backend systems. You will work on production-grade solutions and take ownership of features end-to-end. Key Responsibilities Design and develop backend services using Python and FastAPI Build and maintain REST APIs and microservices architectures Work with queues and asynchronous processing Support and improve production systems Take ownership of tasks from concept to delivery (end-to-end) Collaborate with cross-functional teams in a fully remote setup Requirements Minimum 5 years of experience Strong experience with Python and FastAPI (mandatory) Proven track record in building backend systems and APIs Experience with RESTful services, microservices, and messaging/queue systems Hands-on experience working on production environments Ability to work independently and manage tasks end-to-end Strong problem-solving and communication skills What We Offer Access to Medicover healthcare Multisport card E-learning platform access Group life insurance

🏢 Summary: The offer is for a Database Administrator / Engineer specializing in Db2 and cloud migration, responsible for maintaining and migrating enterprise Db2 databases from on-premises VMware environments to Google Cloud Platform. The role focuses on performance tuning, troubleshooting, compliance in regulated environments, and supporting hybrid cloud architectures. It involves close collaboration with cloud and platform teams to ensure smooth and secure database transitions. 🗂️ Requirements: 4+ years of hands-on experience as Db2 DBA or Database Engineer, Strong knowledge of Db2 on Linux/Unix, Experience in enterprise Db2 environments, Experience with cloud or hybrid deployments, Experience supporting systems in regulated environments, Ability to perform database migrations to cloud platforms, Experience with performance tuning and capacity planning, Experience with database upgrades and troubleshooting 📃 Skills: Db2, Linux, Unix, VMware, GCP, SQL, Bash, Python, Terraform, Networking, Cloud, Automation 🏢 Description: As a recruitment company, DCG understands that every business is powered by experienced professionals. Our management style and partnership approach enable us to meet your needs and provide continuous support. Due to our ongoing growth and the large number of recruitment projects we undertake for our partners, we are currently looking for: Database Administrator / Engineer (Db2 / Cloud Migration) Responsibilities: Support and maintain Db2 databases across on-premises (VMware) and Google Cloud environments Plan, test, and execute complex database migrations to GCP with minimal operational disruption Perform senior-level database administration tasks, including performance tuning, capacity planning, and upgrades Troubleshoot complex incidents and resolve performance bottlenecks in a hybrid architecture Ensure database compliance, risk mitigation, and adherence to strict audit requirements in a regulated financial environment Collaborate closely with cloud architects, platform engineers, and application teams to ensure smooth transitions Create and maintain detailed documentation and operational runbooks for the new cloud-based environment Requirements: 4+ years of hands-on experience as a Db2 DBA / Database Engineer Strong knowledge of Db2 on Linux/Unix platforms Proven experience working in enterprise Db2 environments Exposure to cloud or hybrid deployments (Google Cloud Platform preferred) Experience supporting critical systems in regulated environments Nice to have: Direct experience executing large-scale database modernization or cloud migration programs (e.g., VMware to Cloud) Proficiency in automation and scripting (Bash, Python, Terraform, etc.) Solid understanding of cloud networking concepts and security fundamentals Offer: Private medical care Co-financing for the sports card Constant support of dedicated consultant Employee referral program

🏢 Summary: Senior Full Stack Engineer role focused on building scalable and resilient applications within a cross-functional engineering team. The position involves backend and frontend development using modern JavaScript frameworks and enterprise databases, with containerization and CI/CD practices. Available as hybrid or remote engagement across several European countries. 🗂️ Requirements: Experience with Node.js, Experience with React, Strong knowledge of PL/SQL, Experience with Oracle databases, Experience with Docker, Experience with Kubernetes or ECS, Experience with CI/CD pipelines, Experience with Jenkins or GitLab CI or GitHub Actions, Experience with MongoDB or DynamoDB or PostgreSQL 📃 Skills: Node.js, React, PL/SQL, Oracle, Docker, Kubernetes, ECS, CI/CD, Jenkins, GitLab, GitHub, MongoDB, DynamoDB, PostgreSQL 🏢 Description: Dear Consultant, We are looking for an experienced Senior Full Stack Engineer to join a cross-functional engineering team focused on building scalable and resilient applications. 📍 Poland / Romania / Bulgaria / Spain / Czech Republic / Slovakia 🏠 Hybrid / Remote 💼 Employment Contract / B2B (depending on country) Must Have: • Node.js • React • PL/SQL • Oracle databases • Docker • Kubernetes / ECS • CI/CD • Jenkins / GitLab CI / GitHub Actions • MongoDB / DynamoDB / PostgreSQL Nice to Have: • Java / SpringBoot • Kafka • Microservices • Terraform / CloudFormation • GCP / BigQuery • German language 📩 DM me if interested. marcillina.tietjen@dcvtechnologies.co.uk DCV/CKL/JO/Re:18.05.2026