Senior Backend Developer – Developer Platform

🏢 Summary: Long-term remote B2B opportunity for a Senior Frontend Developer to build a secure, real-time incident reporting platform for a European Union institution. The role focuses on micro-frontend architecture, modernization of monolithic applications, performance optimization, and collaboration across multidisciplinary teams. 🗂️ Requirements: University degree in Computer Science, Computer Engineering, Telecommunications, Information Technology, Business Administration and Management, or related discipline, 5+ years of professional frontend development experience, Advanced JavaScript and TypeScript knowledge, Experience with Angular, Experience with SPA and micro-frontend architectures, Experience with .NET and C#, Knowledge of HTML5, Web Components, and browser APIs, Knowledge of web application performance, scalability, and security, Familiarity with cloud environments and container platforms 📃 Skills: JavaScript, TypeScript, Angular, NET, C#, HTML5, WebComponents, SPA, Microfrontends, Microservices, OpenShift, Cloud, Containers, UI/UX 🏢 Description: Currently, for one of our Partners, we are looking for an experienced Senior Frontend Developer (m/f/n) to support a long‑term project delivered for an organization of the European Union based in Warsaw. You will be joining a strategic project for a European institution, linked to security and border control activities. The project aims to develop a new generation of systems capable of reporting and disseminating information on incidents in real time. The solution will implement the new requirements set out in the regulation recently adopted by the European Commission. Tasks: As a Senior Front-End Engineer, you will participate in the definition, design and implementation of the new platform, working closely with multidisciplinary teams to build scalable, secure and high-performance solutions: Design and implement solutions based on micro-frontend architecture. Participate in the transformation of monolithic applications into architectures based on microservices and micro-frontends. Analyse, optimise and improve the performance, scalability and maintainability of applications. Apply security best practices from the design phase (Security by Design). Collaborate with business analysts in defining and validating functional requirements. Work closely with backend and frontend teams to ensure integrated and consistent solutions. Produce high-quality technical documentation. Carry out code reviews and contribute to the continuous improvement of development standards. Support the analysis and design of user interfaces (UI/UX) Requirements: A university degree in Computer Science, Computer Engineering, Telecommunications, Information Technology, Business Administration and Management, or related disciplines. A minimum of 5 years of demonstrable professional experience in front-end development. Advanced knowledge of JavaScript and TypeScript. Solid experience with modern frameworks such as Angular. Practical experience with SPA and micro-frontend architectures. Experience in .NET with C#. In-depth knowledge of HTML5, Web Components and standard browser APIs. Knowledge of performance optimisation, scalability and security in web applications. Familiarity with cloud environments and container platforms (experience with OpenShift will be an advantage). Offer: B2B contract Remote set-up Rate: 165-175 PLN netto + VAT/H

🏢 Summary: Senior Java Developer role focused on building and modernizing secure, scalable backend platforms and microservices for investment management products. The position offers hands-on architectural ownership, production support responsibilities, and collaboration across Agile engineering and business teams in a hybrid Krakow model. 🗂️ Requirements: 6+ years of commercial Java enterprise application development, Java 17+ proficiency, Advanced Spring and Spring Boot experience, REST API and backend service development experience, Microservices architecture knowledge, Object-oriented design, clean code, and design patterns, SQL query analysis and optimization, Docker and Kubernetes production experience, Kafka or event-streaming platform familiarity, CI/CD and DevOps practices experience, Secure coding and application security knowledge, Security scanning or vulnerability detection tools experience, Logging, monitoring, metrics, and distributed tracing familiarity, Business-critical production support and troubleshooting experience, Cross-functional collaboration with architects, QA, DevOps, and business teams, Very good English communication skills 📃 Skills: Java, Spring, SpringBoot, REST, SQL, Docker, Kubernetes, Kafka, CI/CD, DevOps, Microservices, Agile 🏢 Description: We are hiring on behalf of our client – a global financial services organization recognized for its premium service, deep domain expertise, and strong technology-driven approach. The company partners with clients, helping them solve complex challenges across investor services and capital markets. Their culture is built on collaboration, knowledge sharing, and empowering individuals to contribute beyond their immediate role. As a Senior Java Developer , you will design and develop core backend platforms and scalable microservices. You will contribute to new product development and modernization initiatives, influence architectural decisions, and work closely with engineering and business stakeholders throughout the software development lifecycle. This is a senior, hands-on engineering role with strong ownership expectations. You will help shape technical solutions, improve engineering practices, and ensure that business-critical systems remain secure, reliable, maintainable, and ready to scale. Key takeaways: Stack: Java 17+, Spring, Spring Boot, REST APIs, SQL, Docker, Kubernetes, Kafka, CI/CD Salary: 27 000 - 30 000 PLN gross on the Contract of Employment Working model : Hybrid - 3 days/week from the office (2 days per week for parents of children up to 4 years old) Location: ul. Klimeckiego, Krakow Recruitment process : A call with MOTIFE Recruiter (30 min) Technical interview with the Manager (1h) Technical interview with the Team (1h) Responsibilities: Backend Development Design, develop, and maintain enterprise-grade applications using Java 17+, Spring, and Spring Boot. Build scalable microservices and REST APIs supporting investment management products. Apply object-oriented design, clean code principles, and established software design patterns. Develop solutions that meet demanding performance, reliability, security, and maintainability standards. Architecture and Technical Excellence Contribute to architectural decisions and translate business requirements into effective technical solutions. Drive technical improvements across existing platforms and modernization initiatives. Participate in code reviews and promote consistent engineering standards across the team. Ensure solutions follow secure coding principles and software development lifecycle best practices. Cross-Functional Collaboration Partner with architects, QA engineers, DevOps specialists, and business stakeholders throughout the development lifecycle. Work within a cross-functional Agile team delivering web, backend, and mobile platform capabilities. Communicate technical decisions, risks, and dependencies clearly to technical and non-technical stakeholders. Support knowledge sharing and mentor other engineers where required. Delivery and Production Ownership Troubleshoot and resolve complex technical and production issues. Improve logging, monitoring, metrics, and distributed tracing across services. Enhance CI/CD pipelines to streamline software delivery and deployment. Drive continuous improvements in development processes, engineering tooling, and operational reliability. Requirements: Technical Expertise At least 6 years of hands-on commercial experience developing enterprise applications in Java. Strong practical knowledge of Java 17 or newer. Advanced experience with Spring, Spring Boot, REST APIs, and backend service development. Strong understanding of microservices architecture, object-oriented design, clean code, and software design patterns. Solid SQL skills, including practical experience with query analysis and optimization. Production experience with Docker and Kubernetes. Familiarity with messaging or event-streaming platforms such as Kafka. Experience working with CI/CD pipelines and modern DevOps practices. Security and Production Engineering Understanding of secure coding principles and common application security risks. Experience using security scanning or vulnerability detection tools. Familiarity with application logging, metrics, monitoring, and distributed tracing. Experience troubleshooting and supporting business-critical production systems. Collaboration and Mindset Proven ability to take ownership of technical solutions from design through production support. Strong problem-solving skills and the ability to resolve complex engineering challenges. Ability to collaborate effectively with architects, QA, DevOps, and business teams. Very good English communication skills. What we offer: Private medical care Life insurance Professional training and certification support Social fund benefits platform Stable employment with a long-term contract Apply now Join a senior engineering team building secure and scalable platforms for the investment management industry. Please apply via our careers page and submit your CV in English.

🏢 Summary: Hybrid Senior Java Backend Developer role in Krakow focused on building secure, scalable distributed microservices for modern banking messaging platforms. The role covers application design and development, quality standards, testing, automation, and technical mentoring within an Agile product team. 🗂️ Requirements: 5+ years of senior experience with Java, Spring Boot, and Kubernetes, Hands-on AWS cloud experience, CI/CD experience with GitHub, Jira, Jenkins, Maven, and Groovy, API design expertise: Swagger, OpenAPI 3.0, REST, JSON, microservices, OAuth 2.0 authentication and authorization experience, Kong API Gateway experience, TDD and Agile/Scrum development experience, Ability to translate business requirements into technical solutions, Communicative English proficiency, Legal right to work in Europe 📃 Skills: Java, Spring, Kubernetes, AWS, GitHub, Jira, Jenkins, Maven, Groovy, Swagger, OpenAPI, REST, JSON, Microservices, OAuth, Kong, TDD, Scrum 🏢 Description: Kick-start innovation in banking technology — develop scalable, secure, and high-performing microservices! Krakow-based opportunity with hybrid work model (up to 3 remote days per week). As a Senior Java Backend Developer – Cloud and Microservices Expertise , you will be working for our client, a leading financial institution dedicated to delivering state-of-the-art messaging solutions to enhance customer engagement. Your expertise will drive the design and development of distributed systems, supporting the modernization and standardization of critical messaging platforms. Join us and contribute to shaping the future of banking communication technology. Your main responsibilities: Applying your technical expertise to develop high-quality applications/systems in line with requirements and standards. Collaborating within a multi-disciplinary, Agile product team to design and build distributed microservices using modern technology stacks. Defining and maintaining technical quality standards across platforms. Building strong decision-making and problem-solving skills within your area of expertise. Producing efficient, maintainable code that aligns with business needs and technical dependencies. Conducting thorough unit testing to ensure software performance and reliability. Challenging code and design quality to uphold industry standards and project excellence. Contributing to automation test coverage and quality assurance processes. Maintaining effective communication with team members and stakeholders. Promoting innovative technologies and mentoring engineering colleagues. You’re ideal for this role if you have: Minimum of 5 years’ senior experience in Java, Spring Boot, and Kubernetes. Practical experience working with Cloud platforms, especially AWS. Strong knowledge of CI/CD tools such as GitHub, Jira, Jenkins, Maven, and Groovy. Expertise in API design standards: Swagger, OpenAPI 3.0, REST, JSON, Microservices architecture. Knowledge of authentication and authorization via OAuth 2.0, with experience using Kong API Gateway. Familiarity with Agile testing methodologies, particularly TDD, and extensive Agile/Scrum development experience. Ability to work closely with business stakeholders to translate functional requirements into robust technical solutions. Strong problem-solving capability with a focus on innovative, scalable solutions. It is a strong plus if you have: Experience with additional cloud services or certifications. Knowledge of DevOps practices beyond the core technologies listed. Language Required for the role: English – Communicative proficiency essential for effective collaboration and stakeholder engagement. Eligibility for the role: Only candidates with an existing legal right to work in Europe will be considered for this role. #MAKEYourCareerBETTER Interested? Apply now and include your CV (preferably in English) along with a statement confirming your consent to the processing and storage of your personal data.

🏢 Summary: Senior Backend Engineer role building and operating scalable core services and developer-facing tools for a voice platform. The position spans backend and frontend development, with end-to-end ownership of distributed, cloud-native production systems and collaboration with ML teams. 🗂️ Requirements: 6+ years building and operating distributed backend services, Professional Java experience, Experience designing gRPC/HTTP APIs, Experience with distributed systems and event-driven architectures, Experience operating cloud-native infrastructure in production, End-to-end production system ownership, Ability to collaborate with ML and cross-functional teams, Clear communication of technical trade-offs 📃 Skills: Java, Python, gRPC, HTTP, APIs, Cloud-native, Distributed, Event-driven 🏢 Description: We are looking for a Senior backend Engineer to help build the core services and user-facing tools that power a voice platform. In this role, you will develop and operate the platform's foundational backend systems while also building intuitive frontend experiences. You will work across the full stack, designing scalable backend services and creating high-quality frontend applications that enable internal teams and partners to build, test, and manage voice experiences. This is an opportunity to work on distributed systems at scale, shape developer-facing tools, and own features from concept through production. What You'll Do Design, build, and operate scalable backend services. Develop and maintain distributed systems using gRPC/HTTP APIs and event-driven architectures. Build cloud-native services with a strong focus on reliability, scalability, and performance. Own production systems end-to-end, including architecture, implementation, deployment, monitoring, and iteration. Partner closely with ML engineers to design robust interfaces between backend services and model-serving infrastructure. Collaborate with engineers and cross-functional stakeholders to deliver high-quality technical solutions. Champion engineering best practices, operational excellence, and maintainable system design. Who You Are You have 6+ years of experience building and operating distributed backend services. You have strong professional experience with Java and Python. Experience with Java is essential, while Python is a plus because much of the team's tooling is built in it. You have experience designing and developing gRPC/HTTP APIs, distributed systems, and event-driven architectures. You have experience building and operating cloud-native infrastructure in production environments. You take ownership of systems throughout their full lifecycle, from design through production support. You collaborate effectively with machine learning teams and cross-functional partners. You are an excellent communicator who can clearly explain technical trade-offs to both technical and non-technical stakeholders.

🏢 Summary: Senior Java Developer role focused on building and modernizing a global enterprise data integration platform. The position delivers scalable microservices, event-driven data processing, and system integrations, with Apache Kafka production expertise as a core requirement. 🗂️ Requirements: 10+ years of commercial software development experience, Senior-level Java backend expertise, Production experience with Apache Kafka, Experience designing microservices and scalable backend services, Experience with event-driven architectures, Experience with distributed systems and enterprise integrations, Experience with data-processing solutions, Ability to contribute independently to technical design and architecture discussions, Very good English communication skills, Residence in Poland, Valid Confluent Certified Developer for Apache Kafka (CCDAK) certification 📃 Skills: Java, SpringBoot, ApacheKafka, Microservices, EventDriven, DistributedSystems, APIs, Messaging, DDD, CCDAK 🏢 Description: We are looking for an experienced Senior Java Developer to join a team building a modern enterprise data integration and processing platform that supports key logistics and transportation processes on a global scale. This role focuses on developing scalable backend services, microservices, and event-driven integrations within a complex enterprise environment. You will contribute to the design and implementation of solutions that enable efficient data processing and communication across business systems. An important part of the role involves modernizing legacy applications and delivering solutions aligned with Domain-Driven Design principles. We are looking for a self-driven professional who can actively participate in architecture discussions and make sound technical decisions. Strong hands-on production experience with Apache Kafka is essential for success in this role. Your tasks Designing, developing, and maintaining scalable backend services and microservices using Java and Spring Boot Implementing event-driven architectures and data-processing solutions based on Apache Kafka Building enterprise integrations between internal and external systems using APIs, messaging platforms, and asynchronous communication mechanisms Participating in technical design and solution architecture discussions, providing expertise in distributed systems and integration patterns Supporting the modernization and transformation of legacy applications into scalable, maintainable, and cloud-ready solutions Monitoring, troubleshooting, and optimizing application performance, reliability, and scalability across distributed environments Collaborating closely with developers, architects, and business stakeholders to deliver strategic data integration and digital transformation initiatives Requirements Minimum 10 years of commercial software development experience, including strong senior-level expertise in Java backend development Strong hands-on production experience with Apache Kafka Proven experience designing and building microservices, scalable backend services, and event-driven architectures Practical experience working with distributed systems, enterprise integrations, and data processing solutions Ability to contribute independently to technical design and solution architecture discussions Very good English communication skills, enabling effective collaboration in an international environment Residence in Poland Valid Confluent Certified Developer for Apache Kafka (CCDAK) certification Nice-to-have requirements Production experience with Kafka Streams and Kafka Connect Experience with cloud-native and containerized environments, including Azure, Kubernetes, OpenShift, Docker, or Podman