Full Stack Developer (Next.js / NestJS)

🏢 Summary: Join an early-stage product team to design and deliver scalable, high-volume backend systems using Node.js, TypeScript, and AWS. The role offers end-to-end ownership, influence over architecture and engineering practices, and mentoring responsibilities in a hybrid Kraków setup. 🗂️ Requirements: 5+ years of production software development with Node.js and TypeScript, Practical AWS knowledge, Distributed systems design knowledge, Scalability knowledge, Event-driven architecture experience, Automated testing experience, Independent problem-solving ability, English communication skills, Ability to work in an evolving, fast-paced environment 📃 Skills: Node.js, TypeScript, AWS, Lambda, ECS, S3, RDS, Jest, Vitest, Playwright 🏢 Description: Build high-scale systems from the beginning We’re hiring an experienced backend engineer to help create a new product. You’ll influence early technical decisions, build systems designed for demanding workloads, and take meaningful ownership from architecture through production. The technology processes large volumes of information and supports products where speed, availability, and accuracy matter. This role offers the opportunity to solve difficult engineering problems, make pragmatic architectural decisions, and see work reach production. What you’ll be doing • Design and deliver scalable backend services with Node.js and TypeScript. • Build APIs and asynchronous, event-driven workflows in AWS. • Engineer reliable systems capable of supporting intensive, high-volume workloads. • Own features throughout their lifecycle, from technical discovery and design to deployment and ongoing improvement. • Help establish the architecture and engineering practices of a new product. • Partner with product specialists and engineers across multiple disciplines. • Support other developers through mentoring, thoughtful reviews, and knowledge sharing. • Strengthen standards around testing, security, maintainability, and operational reliability. • Respond constructively as requirements evolve and new technical challenges emerge. What we’re looking for • At least five years of professional experience building production software with Node.js and TypeScript. • Strong practical knowledge of AWS. • Experience with services such as Lambda, ECS, S3, or RDS is especially relevant. • A solid understanding of distributed system design, scalability, and event-driven architecture. • Experience using modern automated testing tools such as Jest, Vitest, or Playwright. • The confidence to investigate unfamiliar problems and move work forward independently. • Clear English communication skills. • Comfort working in an energetic environment where priorities and products continue to evolve. Additional experience we’d value You don’t need to bring everything on this list, but any of the following would be useful: • Go development. • Distributed platforms or messaging-based systems. • Large language models or contemporary AI development tools. • React. • Relational and non-relational databases. • Docker and Kubernetes. • CI/CD pipelines and modern delivery practices. Why consider this opportunity? • Join at an early stage and help shape a product’s technical direction. • Work on challenging systems where performance and reliability are fundamental. • Take genuine ownership without unnecessary layers of decision-making. • Become part of a new engineering group in Kraków with room to influence how it develops. • Collaborate in an international, English-speaking environment. • Choose between an employment contract and a B2B arrangement. • Work within a hybrid model in Kraków. • Join a profitable, expanding business focused on sustainable long-term growth.

🏢 Summary: Senior Fullstack Developer role focused on building sustainable crop science solutions within a global healthcare and agriculture environment. The position involves designing and delivering business-critical, identity-related systems using modern JavaScript technologies in an agile, product-oriented team. Hybrid work model in Warsaw with strong emphasis on cloud architecture, scalability, and technical leadership. 🗂️ Requirements: 5+ years of software development experience, Strong knowledge of JavaScript ecosystem, Commercial experience with Node.js, Proficiency in TypeScript, Strong experience with React, Experience with AWS services (DynamoDB, Lambda, Step Functions), Experience designing technical architecture, Experience working in agile teams, Fluent English communication skills, Legal right to work in Europe 📃 Skills: JavaScript, Node.js, TypeScript, React, AWS, DynamoDB, Lambda, StepFunctions, APIs, Cloud, Architecture, Agile 🏢 Description: Ignite innovation in environmental care — shape sustainable solutions through cutting-edge software engineering. Warsaw-based opportunity with a hybrid work model (once every two weeks in the office). As a Senior Fullstack Developer , you will be working for our client, a global leader in healthcare and agriculture. You will contribute to solving major global challenges by developing innovative crop science solutions that promote sustainability, resilience, and community well-being. This role offers a platform for impactful work and career growth in a dynamic, global environment. Your main responsibilities: Develop and support business-critical solutions within an agile, product-oriented team. Solve organization-wide challenges related to identity and account management. Design and document technical architecture and software solutions across multiple teams. Ensure consistency, quality, and performance of all developed solutions. Evaluate and recommend new technologies to enhance system efficiency and scalability. Build and maintain relationships with key stakeholders and partner organizations. Mentor junior engineers, fostering technical growth and best practices. Continuously enhance your technical skills in a fast-paced environment. You're ideal for this role if you have: 5+ years of experience in software development or engineering. Strong problem-solving skills, proactive attitude, and collaborative mindset. Deep knowledge of JavaScript, including runtimes, APIs, and ecosystem. Extensive experience with backend development using Node.js. Proficiency in TypeScript and writing clean, maintainable code. Strong front-end skills in React, build tools, and performance optimization. Cloud expertise with AWS services, including DynamoDB, Lambda, and Step Functions. Product-oriented mindset, understanding business domains to suggest pragmatic solutions. Excellent English communication skills and experience working in an agile, global team. Willingness to learn, develop, and innovate in a fast-paced environment. It is a strong plus if you have: Knowledge of Medusa.js. Experience with SAP or Salesforce integrations. Language required for the role: Communicative English. Eligibility to work in: 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 Fullstack Developer role focused on building sustainable crop science solutions in a global agile environment. The position involves developing and optimizing fullstack applications, solving identity and account management challenges, and designing scalable cloud-based architectures using modern JavaScript technologies. Fully remote work opportunity based in Warsaw with strong emphasis on innovation, collaboration, and mentoring. 🗂️ Requirements: 5+ years of software development experience, Strong JavaScript knowledge, Experience with Node.js backend development, Proficiency in TypeScript, Strong React frontend development skills, Experience with AWS services, English communication skills, Experience working in agile global teams, Legal right to work in Europe 📃 Skills: JavaScript, Node.js, TypeScript, React, AWS, DynamoDB, Lambda, StepFunctions, Medusa, SAP, Salesforce 🏢 Description: Ignite innovation in environmental care — shape sustainable solutions through cutting-edge software engineering. Warsaw-based opportunity with a fully remote workmode! As a Senior Fullstack Developer , you will be working for our client, a global leader in healthcare and agriculture. You will contribute to solving major global challenges by developing innovative crop science solutions that promote sustainability, resilience, and community well-being. This role offers a platform for impactful work and career growth in a dynamic, global environment. Your main responsibilities: Develop and support business-critical solutions within an agile, product-oriented team. Solve organization-wide challenges related to identity and account management. Design and document technical architecture and software solutions across multiple teams. Ensure consistency, quality, and performance of all developed solutions. Evaluate and recommend new technologies to enhance system efficiency and scalability. Build and maintain relationships with key stakeholders and partner organizations. Mentor junior engineers, fostering technical growth and best practices. Continuously enhance your technical skills in a fast-paced environment. You're ideal for this role if you have: 5+ years of experience in software development or engineering. Strong problem-solving skills, proactive attitude, and collaborative mindset. Deep knowledge of JavaScript, including runtimes, APIs, and ecosystem. Extensive experience with backend development using Node.js. Proficiency in TypeScript and writing clean, maintainable code. Strong front-end skills in React, build tools, and performance optimization. Cloud expertise with AWS services, including DynamoDB, Lambda, and Step Functions. Product-oriented mindset, understanding business domains to suggest pragmatic solutions. Excellent English communication skills and experience working in an agile, global team. Willingness to learn, develop, and innovate in a fast-paced environment. It is a strong plus if you have: Knowledge of Medusa.js. Experience with SAP or Salesforce integrations. Language required for the role: Communicative English. Eligibility to work in: 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 Fullstack Developer role focused on building sustainable crop science solutions in a global agile environment. The position involves developing and supporting business-critical applications, designing technical architectures, and solving identity and account management challenges using modern fullstack technologies. Hybrid work model in Warsaw with opportunities for innovation, mentoring, and collaboration across global teams. 🗂️ Requirements: 5+ years of software development or engineering experience, Strong knowledge of JavaScript runtimes, APIs, and ecosystem, Experience with backend development using Node.js, Proficiency in TypeScript, Strong frontend development skills with React, Experience with AWS services, Ability to design and document technical architecture, Experience working in agile global teams, Excellent English communication skills, Legal right to work in Europe 📃 Skills: JavaScript, Node.js, TypeScript, React, AWS, DynamoDB, Lambda, StepFunctions, Medusa.js, SAP, Salesforce 🏢 Description: Ignite innovation in environmental care — shape sustainable solutions through cutting-edge software engineering. Warsaw-based opportunity with a fully remote workmode! As a Senior Fullstack Developer , you will be working for our client, a global leader in healthcare and agriculture. You will contribute to solving major global challenges by developing innovative crop science solutions that promote sustainability, resilience, and community well-being. This role offers a platform for impactful work and career growth in a dynamic, global environment. Your main responsibilities: Develop and support business-critical solutions within an agile, product-oriented team. Solve organization-wide challenges related to identity and account management. Design and document technical architecture and software solutions across multiple teams. Ensure consistency, quality, and performance of all developed solutions. Evaluate and recommend new technologies to enhance system efficiency and scalability. Build and maintain relationships with key stakeholders and partner organizations. Mentor junior engineers, fostering technical growth and best practices. Continuously enhance your technical skills in a fast-paced environment. You're ideal for this role if you have: 5+ years of experience in software development or engineering. Strong problem-solving skills, proactive attitude, and collaborative mindset. Deep knowledge of JavaScript, including runtimes, APIs, and ecosystem. Extensive experience with backend development using Node.js. Proficiency in TypeScript and writing clean, maintainable code. Strong front-end skills in React, build tools, and performance optimization. Cloud expertise with AWS services, including DynamoDB, Lambda, and Step Functions. Product-oriented mindset, understanding business domains to suggest pragmatic solutions. Excellent English communication skills and experience working in an agile, global team. Willingness to learn, develop, and innovate in a fast-paced environment. It is a strong plus if you have: Knowledge of Medusa.js. Experience with SAP or Salesforce integrations. Language required for the role: Communicative English. Eligibility to work in: 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 focused on driving platform evolution, contributing to architecture decisions, and maintaining high code quality standards. The position involves hands-on development in Node.js and TypeScript, strong ownership of AWS-based cloud infrastructure, and collaboration on scalable, secure backend systems. The role also includes defining technical direction, improving CI/CD and observability, and mentoring team members. 🗂️ Requirements: 5+ years of backend development experience, Strong hands-on experience with Node.js, Strong hands-on experience with TypeScript, Deep expertise in AWS cloud services, Experience with ALB and NLB management, Experience with AWS WAF configuration and operations, Experience building secure and scalable cloud-native applications, Production experience with MongoDB, Strong understanding of RESTful APIs, Experience with complex backend integrations, Proficiency with Git, Experience with Docker, Experience with CI/CD tools such as GitHub Actions or Jenkins 📃 Skills: Node.js, TypeScript, AWS, ALB, NLB, WAF, MongoDB, REST, Git, Docker, CICD, GitHubActions, Jenkins 🏢 Description: Opis stanowiska: Work closely with the system architect to drive platform evolution and long-term technical decisions Actively contribute to development, architecture discussions, and code quality initiatives Define and plan technical work in collaboration with stakeholders and team members Promote engineering excellence: clean code, peer reviews, testing, observability, and CI/CD Provide mentoring, support, and guidance to team members Wymagania: 5+ years of backend development experience with strong hands-on skills in Node.js and TypeScript Deep expertise in AWS, with focus on: Load Balancer (ALB/NLB) management, AWS WAF setup and operations, Security and scalability in cloud-native applications Production experience with MongoDB Solid understanding of RESTful APIs and complex backend integrations Proficiency with Git, Docker, and CI/CD tools (e.g., GitHub Actions, Jenkins) Excellent communication skills in English — written and spoken — to work effectively in international teams Proactive, structured, and able to drive initiatives independently Optional Experience with event-driven systems (e.g., Kafka) Exposure to IoT or Smart Home platforms Familiarity with tools like Confluence, JIRA, React, or similar Oferujemy: Dynamic International Environment: Collaborate with diverse teams globally, enriching your experience and expanding your professional network Collaborative Team Culture: Join a supportive team that values your contributions and encourages your growth Professional Development Opportunities: Expand your skills through engaging projects and responsibilities that challenge and inspire you Flexible hybrid work arrangements: Enjoy a mix of remote work and office collaboration, with a minimum of one day per week in our modern offices Comprehensive Benefits Package: Enjoy private health care, a Lunchpass card, a sports card, group insurance options and employee discounts

🏢 Summary: Senior Full Stack Developer role focused on architecting and delivering high-performance web applications using React and Node.js. The position involves leading system design, building scalable front-end and back-end solutions, and overseeing cloud-based deployments and DevOps processes. The role includes technical ownership of microservices, APIs, databases, and application performance in a hybrid Warsaw-based setup. 🗂️ Requirements: 7+ years full stack development experience, 2+ years in senior or technical lead role, Expert-level React.js with Hooks and Redux, Advanced JavaScript ES6+ proficiency, Strong Node.js and Express.js experience, Experience designing REST or GraphQL APIs, Experience with OAuth, JWT, sessions, RBAC, Database design and optimization with PostgreSQL, MySQL, or MongoDB, Hands-on Docker experience, Experience with AWS, Azure, or GCP, CI/CD pipeline management experience, Proficiency with Git workflows, Bachelor’s or Master’s in Computer Science or related field 📃 Skills: React, Redux, JavaScript, HTML5, CSS3, Node.js, Express, GraphQL, REST, OAuth, JWT, RBAC, PostgreSQL, MySQL, MongoDB, Docker, Kubernetes, AWS, Azure, GCP, Git, CI/CD, Webpack, Babel, Vite 🏢 Description: 🧩 About the Company Our client is a rapidly growing US-based technology firm with global operations. With a strong commitment to innovation and quality engineering, the company is building a new engineering hub in Warsaw. This is your opportunity to join a high-performing team and play a pivotal role in developing next-generation digital solutions for the private capital markets. 📍 Location & Setup Start remotely and transition to a hybrid model based in Warsaw (3 days/week in the office in the coming months). 🧠 The Role: Senior Full Stack Developer (React & Node.js) We’re looking for an expert-level Senior Full Stack Developer with at least 7 years of professional experience in designing, architecting, and delivering high-performance web applications. You will take ownership of complex technical challenges across both the front-end and back-end, drive architectural decisions, and provide technical leadership and mentorship within the software development lifecycle. 🔧 Key Responsibilities Technical Leadership: Architect and develop scalable, responsive UIs with React.js, Redux, and modern JavaScript (ES6+). System Design: Design, build, and scale advanced server-side applications, microservices architecture, and RESTful/GraphQL APIs with Node.js and Express. Data Architecture: Lead database design, optimization, and integration strategies (PostgreSQL, MySQL, or MongoDB). Quality Assurance: Define testing strategies, write robust unit/integration tests, and establish efficient debugging protocols for the team. DevOps & Deployment: Oversee and optimize CI/CD pipelines, containerization using Docker, and cloud deployments. Agile Mentorship: Lead agile collaboration with product managers, designers, and engineers, while mentoring mid-level and junior developers. Performance: Proactively monitor system performance, identify bottlenecks, and maintain high-availability production-grade applications. Standards: Establish and maintain comprehensive technical documentation and coding standards. 📌 What We’re Looking For Front-End: Expert-level experience with React.js, Hooks, Redux, and complex component-based architecture. Deep mastery of HTML5, CSS3, and ES6+. Advanced configuration and optimization experience with build tools like Webpack, Babel, or Vite. Back-End: Senior-level proficiency in Node.js & Express.js for enterprise applications. Extensive API design and architecture experience (GraphQL highly preferred, alongside REST). Deep understanding and implementation experience with advanced security and authentication protocols: OAuth, JWT, sessions, and RBAC. Databases & DevOps: Proven experience in scaling and optimizing relational and non-relational databases (PostgreSQL, MySQL, or MongoDB). Solid hands-on experience with Docker; Kubernetes experience is highly advantageous. Demonstrated experience designing and deploying applications on cloud platforms (AWS, Azure, or GCP). Advanced proficiency with Git workflows and driving Agile/Scrum methodologies. 🎓 Qualifications Bachelor’s or Master’s in Computer Science or a related field. 7+ years of hands-on experience in full stack development. 2+ years of experience in a senior or technical lead capacity. Proven track record of architecting, deploying, and maintaining high-traffic production applications. 💡 Soft Skills Strategic, analytical thinker and highly effective problem-solver. Strong technical leadership, team collaboration, and cross-functional communication skills. Self-motivated with excellent time management and the ability to drive projects autonomously. Passion for continuous learning, adopting new technologies, and sharing knowledge with the team. 🎁 What’s Offered Competitive salary up to $6,200 USD/month. Hybrid remote role with 3 days form office in the heart of Warsaw Generous Paid Time Off (PTO). Comprehensive full benefits package. The unique chance to shape the technical foundation of a new engineering hub and lead high-impact projects. A supportive, innovation-driven work environment that values technical excellence.

🏢 Summary: Hybrid B2B Full-stack Developer role focused on designing and building scalable backend and frontend applications, with strong emphasis on Java/Spring-based microservices and React frontend. The position involves API development, cloud-ready architecture, CI/CD practices, and ensuring non-functional requirements such as security and resilience. The developer will collaborate cross-functionally to deliver reliable, high-quality solutions in an Agile environment. 🗂️ Requirements: Experience developing APIs and Microservices using Java or Spring Boot, Experience with Java/J2EE and Spring Framework, Experience with Hibernate JPA, Experience building and consuming REST web services, Experience processing XML and JSON data, Experience with RDBMS databases (Oracle, PostgreSQL), Experience with MongoDB, Experience working in Agile/Scrum/Kanban methodologies, Experience with CI/CD pipelines, Experience with Jenkins, Experience with Docker, Experience with Git, Knowledge of Unix, Frontend experience with React.js, Experience with JavaScript and TypeScript, Understanding of code security principles 📃 Skills: Java, Spring, SpringBoot, J2EE, Hibernate, JPA, REST, XML, JSON, Oracle, PostgreSQL, MongoDB, Jenkins, Docker, Git, Unix, React, JavaScript, TypeScript, CI/CD 🏢 Description: Summary: The Full-stack Developer role focuses on developing and maintaining applications across both backend and frontend, ensuring a balanced skill set in both areas to accommodate market demands. Work model: Hybrid (6 times per month work from office-Cracow) Business trips: n/a Start: ASAP/ one month notice period Assignment type: B2B Budget: 150-170 zł/h Main Responsibilities: Knowledge of Data modelling and Data Architecture concepts, security concepts, Architecture design, Business Functional Domains. Awareness of Infrastructure Design, Integration concepts, techniques, and patterns. Ensuring non-functional requirements (NFRs) are architected into the design, including API governance for various types of APIs. Developing skills for cloud design, creating resilient and flexible solutions. Building scalable and reliable product features through design, implementation, and maintenance of applications. Applying problem-solving and analytical skills to a variety of issues. Collaborating with cross-functional teams for scalable solutions. Estimating engineering efforts and creating realistic schedules. Identifying and resolving complex production issues. Rapidly fixing bugs and solving problems. Conducting design and code reviews, performing unit-testing for robustness and reliability. Utilizing source control and bug tracking systems effectively. Key Requirements: Hands-on experience in developing APIs and Microservices using core Java and/or Spring Boot; understanding of code security principles. Experience with application development in Java/J2EE, including Spring Framework and Hibernate JPA. Experience in developing reusable APIs and working with web services (REST), processing data (XML/JSON). Expertise in Agile/Scrum/Kanban methodologies, with experience in working with Databases (RDBMS) - Oracle, PostgreSQL, MongoDB. Expertise with CI/CD pipelines, Jenkins, Docker, shell scripting, and GIT; knowledge of Unix. Frontend experience with React.js, JavaScript, and TypeScript. Nice to Have: Experience in JavaScript frameworks such as React.js, Node.js, Angular, and jQuery. Familiarity with JavaScript build tools and dependency management. Experience in creating responsive web designs (Bootstrap, mobile, etc.). Experience with cloud platforms such as GCP, GKE, AWS is advantageous. Knowledge in system architecture and solution design. Experience with Python, Machine Learning, and Data Science.

🏢 Summary: Hybrid B2B Full-stack Developer role focused on designing and maintaining scalable backend and frontend applications with strong emphasis on Java-based APIs, microservices, and cloud-ready architecture. The position involves building resilient solutions, ensuring non-functional requirements, and collaborating with cross-functional teams in an Agile environment. The role requires regular office presence in Cracow and offers a competitive hourly rate. 🗂️ Requirements: Hands-on experience with Java and Spring Boot for APIs and Microservices, Experience with Java/J2EE, Spring Framework, Hibernate JPA, Experience with REST web services and XML/JSON processing, Understanding of code security principles, Experience with RDBMS databases (Oracle, PostgreSQL) and MongoDB, Experience with CI/CD pipelines and Jenkins, Experience with Docker, GIT, shell scripting, Unix, Frontend experience with React.js, JavaScript, TypeScript, Experience working in Agile/Scrum/Kanban methodologies, Knowledge of data modelling and architecture design concepts 📃 Skills: Java, Spring, SpringBoot, J2EE, Hibernate, JPA, REST, XML, JSON, Oracle, PostgreSQL, MongoDB, Jenkins, Docker, GIT, Unix, Shell, React, JavaScript, TypeScript, CI/CD, Microservices 🏢 Description: Summary: The Full-stack Developer role focuses on developing and maintaining applications across both backend and frontend, ensuring a balanced skill set in both areas to accommodate market demands. Work model: Hybrid (6 times per month work from office-Cracow) Business trips: n/a Start: ASAP/ one month notice period Assignment type: B2B Budget: 150-170 zł/h Main Responsibilities: Knowledge of Data modelling and Data Architecture concepts, security concepts, Architecture design, Business Functional Domains. Awareness of Infrastructure Design, Integration concepts, techniques, and patterns. Ensuring non-functional requirements (NFRs) are architected into the design, including API governance for various types of APIs. Developing skills for cloud design, creating resilient and flexible solutions. Building scalable and reliable product features through design, implementation, and maintenance of applications. Applying problem-solving and analytical skills to a variety of issues. Collaborating with cross-functional teams for scalable solutions. Estimating engineering efforts and creating realistic schedules. Identifying and resolving complex production issues. Rapidly fixing bugs and solving problems. Conducting design and code reviews, performing unit-testing for robustness and reliability. Utilizing source control and bug tracking systems effectively. Key Requirements: Hands-on experience in developing APIs and Microservices using core Java and/or Spring Boot; understanding of code security principles. Experience with application development in Java/J2EE, including Spring Framework and Hibernate JPA. Experience in developing reusable APIs and working with web services (REST), processing data (XML/JSON). Expertise in Agile/Scrum/Kanban methodologies, with experience in working with Databases (RDBMS) - Oracle, PostgreSQL, MongoDB. Expertise with CI/CD pipelines, Jenkins, Docker, shell scripting, and GIT; knowledge of Unix. Frontend experience with React.js, JavaScript, and TypeScript. Nice to Have: Experience in JavaScript frameworks such as React.js, Node.js, Angular, and jQuery. Familiarity with JavaScript build tools and dependency management. Experience in creating responsive web designs (Bootstrap, mobile, etc.). Experience with cloud platforms such as GCP, GKE, AWS is advantageous. Knowledge in system architecture and solution design. Experience with Python, Machine Learning, and Data Science.

🏢 Summary: Hybrid B2B Full-stack Developer role focused on designing, developing, and maintaining scalable backend and frontend applications with strong emphasis on API and microservices architecture. The position involves building resilient cloud-ready solutions, ensuring non-functional requirements, and collaborating with cross-functional teams in an Agile environment. The role requires strong Java/Spring expertise, frontend experience with React, and hands-on knowledge of CI/CD and modern DevOps practices. 🗂️ Requirements: Hands-on experience developing APIs and Microservices using Java or Spring Boot, Experience with Java/J2EE application development, Experience with Spring Framework and Hibernate JPA, Experience building REST web services and processing XML/JSON, Understanding of code security principles, Experience with RDBMS databases, Experience with Oracle, PostgreSQL, or MongoDB, Experience working in Agile/Scrum/Kanban environments, Experience with CI/CD pipelines, Experience with Jenkins and Docker, Experience with shell scripting and Git, Knowledge of Unix, Frontend experience with React.js, Proficiency in JavaScript and TypeScript 📃 Skills: Java, J2EE, Spring, SpringBoot, Hibernate, JPA, REST, XML, JSON, Oracle, PostgreSQL, MongoDB, Jenkins, Docker, Git, Unix, React, JavaScript, TypeScript, CI/CD 🏢 Description: Summary: The Full-stack Developer role focuses on developing and maintaining applications across both backend and frontend, ensuring a balanced skill set in both areas to accommodate market demands. Work model: Hybrid (6 times per month work from office-Cracow) Business trips: n/a Start: ASAP/ one month notice period Assignment type: B2B Budget: 150-170 zł/h Main Responsibilities: Knowledge of Data modelling and Data Architecture concepts, security concepts, Architecture design, Business Functional Domains. Awareness of Infrastructure Design, Integration concepts, techniques, and patterns. Ensuring non-functional requirements (NFRs) are architected into the design, including API governance for various types of APIs. Developing skills for cloud design, creating resilient and flexible solutions. Building scalable and reliable product features through design, implementation, and maintenance of applications. Applying problem-solving and analytical skills to a variety of issues. Collaborating with cross-functional teams for scalable solutions. Estimating engineering efforts and creating realistic schedules. Identifying and resolving complex production issues. Rapidly fixing bugs and solving problems. Conducting design and code reviews, performing unit-testing for robustness and reliability. Utilizing source control and bug tracking systems effectively. Key Requirements: Hands-on experience in developing APIs and Microservices using core Java and/or Spring Boot; understanding of code security principles. Experience with application development in Java/J2EE, including Spring Framework and Hibernate JPA. Experience in developing reusable APIs and working with web services (REST), processing data (XML/JSON). Expertise in Agile/Scrum/Kanban methodologies, with experience in working with Databases (RDBMS) - Oracle, PostgreSQL, MongoDB. Expertise with CI/CD pipelines, Jenkins, Docker, shell scripting, and GIT; knowledge of Unix. Frontend experience with React.js, JavaScript, and TypeScript. Nice to Have: Experience in JavaScript frameworks such as React.js, Node.js, Angular, and jQuery. Familiarity with JavaScript build tools and dependency management. Experience in creating responsive web designs (Bootstrap, mobile, etc.). Experience with cloud platforms such as GCP, GKE, AWS is advantageous. Knowledge in system architecture and solution design. Experience with Python, Machine Learning, and Data Science.

🏢 Summary: Backend and Cloud Engineer role focused on designing and scaling IoT-driven, cloud-native platforms in AWS. The position involves building distributed backend services, event-driven architectures, and telemetry processing systems while owning infrastructure and CI/CD pipelines. The engineer contributes to architecture decisions and ensures secure, scalable, and production-ready solutions. 🗂️ Requirements: University degree in Computer Science or related field, 5+ years of backend engineering experience, Strong expertise in TypeScript and Node.js, Hands-on experience with NestJS and scalable REST APIs, Deep experience with AWS services including IoT Core, Lambda, Kinesis, SQS, Timestream, IAM, CloudWatch, Experience with infrastructure as code and Kubernetes, Experience with containerization and CI/CD pipelines, Strong knowledge of distributed systems and event-driven architectures, Experience with IoT communication patterns such as MQTT, Fluent English and Polish, Availability for hybrid work (1–2 office visits per week) 📃 Skills: TypeScript, Node.js, NestJS, Fastify, REST, OpenAPI, AWS, IoT, IoTCore, Lambda, Kinesis, SQS, Timestream, IAM, CloudWatch, MQTT, PostgreSQL, Aurora, Terraform, OpenTofu, Kubernetes, Helm, GitLab, CI/CD 🏢 Description: Responsibilities We are looking for a strong backend and cloud engineer with deep experience in IoT and distributed systems who wants to shape and scale modern cloud - native platforms . You will design and evolve IoT and cloud architectures at OBI Smart Technologies Poland , working across device communication , telemetry processing and automation workflows . You act as a technical driver within the team, contributing to architecture decisions and ensuring scalable, secure and production-ready solutions across AWS environments . Your key responsibilities include: Design and develop scalable backend services using TypeScript, Node.js, NestJS and Fastify within distributed systems. Lead the design and evolution of REST APIs using OpenAPI standards and robust validation and versioning strategies. Design and operate AWS - native IoT and event-driven architectures using IoT Core, MQTT, Lambda, Kinesis and related services. Build scalable data processing and automation workflows for telemetry and energy-related data using Timestream , SQS and streaming services . Design and optimize persistence layers using PostgreSQL or Aurora and ensure data consistency and performance. Own infrastructure and deployment design using Terraform or OpenTofu , Kubernetes , Helm and GitLab CI/CD pipelines . Drive engineering best practices , observability , reliability and security standards while supporting GDPR-related backend processes and mentoring team members. Benefits Motivizer Benefits Platform to choose and manage all your benefits in one place. You receive a budget (550 PLN monthly). You can choose medical care package, meal tickets, sports cards (we have Multisport and on preferential terms, we have membership cards to one of the most popular Gyms), cinema tickets, shop vouchers, discounts and many more. Language Courses – you'll have access to a multi-language learning platform enabling you to practice your language skills and learn new ones! Regular and systematic further training opportunities - both internally and from external providers. We support your ongoing learning and development. Cooperation within an internal community is our everyday reality. We have networking events, coding challenges, and company parties for different occasions. Qualifications Completed university degree in Computer Science or a comparable technical field. 5+ years of professional experience in backend engineering with strong expertise in TypeScript and Node . js . Strong hands-on experience with NestJS and designing scalable REST APIs in production environments. Deep experience with AWS cloud services including IoT Core , Lambda , Kinesis , SQS , Timestream , IAM and CloudWatch . Strong experience with infrastructure as code , Kubernetes , containerization and CI/CD pipelines . Solid understanding of distributed systems, event-driven architectures and IoT communication patterns such as MQTT . Ability to translate complex business requirements into scalable technical solutions. Fluent communication skills in English and Polish and availability to work in a hybrid mode with 1–2 office visits per week. About OBI Smart Technologies WHO ARE WE: We are a joint venture between OBI and Reply Group, responsible for co-designing, building and operating mission-critical digital platforms for commerce, customer service, and omnichannel retail. OUR MISSION: " We unite technology leadership with deep retail vision to implement standardized processes and scalable digital products that drive efficient support for one of Europe’s largest DIY retailers. Leveraging proven best practices, we advance the internationalization of products and the digital mindset of our partners, delivering consistent and business-critical solutions to support the targets of our customer. "