Senior Backend Developer

🏢 Summary: Senior Backend Developer role focused on designing, building, and maintaining scalable, secure backend services for a cloud-native digital platform supporting IoT-enabled solutions. The position involves end-to-end ownership of features, including development, testing, deployment, monitoring, and incident handling in a data-intensive, high-traffic environment. You will collaborate cross-functionally to deliver reliable systems using modern AWS-based infrastructure and DevOps practices. 🗂️ Requirements: Minimum 7 years of backend development experience, Strong knowledge of algorithms, data structures, system design, Proficiency in JavaScript and TypeScript, Experience with Node.js and npm, Hands-on experience with AWS services (Lambda, S3, DynamoDB, RDS, VPC), Experience with Kubernetes and Terraform, Experience building REST APIs, Knowledge of API security, authentication, authorization, OWASP, Experience with event-driven architecture, Experience with unit, E2E, and load testing, Experience with CI/CD pipelines and Docker, Experience monitoring and supporting production systems, Experience with data-intensive and high-traffic applications, Fluent English, Ability to work hybrid from Tumba office 3 days per week 📃 Skills: JavaScript, TypeScript, Node.js, npm, AWS, Lambda, S3, DynamoDB, RDS, VPC, CDK, Kubernetes, Terraform, REST, OWASP, Jest, Cypress, JMeter, SonarQube, Git, CI/CD, Docker, Grafana, Loki, Sentry, OpsGenie, Algorithms, DataStructures, SystemDesign 🏢 Description: 🚀 Senior Backend Developer Location: Krakow, Poland or Tumba, Sweden (Hybrid) Contract: B2B, Full-Time Join the Future of Digital Tech with Kolomolo At Kolomolo , we don’t just follow trends - we set them. As a global supplier of IT services and digital modernization solutions, we help businesses embrace cutting-edge technology to optimize their operations. Now, we are growing and looking for fresh talent to grow with us. Are you proactive, tech-savvy, and eager to build your career in IT? This role could be your perfect fit. About the Role Are you a backend developer who enjoys solving real-world problems with clean, scalable code? Do you want your work to have a meaningful impact beyond the screen? At Kolomolo,we are looking for a technically driven and collaborative Senior Backend Developer to join our cross-functional team developing our digital platform supporting modern dairy farmers around the world. In this role, you will work closely with Product Owners, Project Managers, Scrum Masters, UX Designers, QA Engineers, and other developers to build and maintain the backend services powering our website. You will be involved in the entire feature lifecycle - from design and development to testing, deployment, monitoring, and incident handling. You will build and evolve backend functionality that supports Service Technicians and Installers in their daily work. This includes solutions for installation, configuration, equipment health monitoring, troubleshooting, sw/fw update orchestration, device lifecycle orchestration, and IoT-enabled services. You will help shape robust, secure, scalable, and observable backend services using modern, cloud-native technologies. This role is ideal for someone who’s excited to deliver reliable systems at scale, enjoys working with data-intensive applications, and is passionate about making a difference in the lives of real users. What You’ll Be Doing Design, build, and maintain backend services for our platform; Collaborate with a cross-functional team to deliver high-quality features end to end; Write secure and testable APIs following OWASP and clean code principles; Manage infrastructure and deployments using modern IaC and DevOps tools; Work on data-heavy services that are central to our platform’s performance and reliability; Monitor services in production, respond to incidents, and continuously improve system resilience; Contribute to our culture of learning and knowledge sharing. What We Are Looking For We are looking for someone with at least 7 years of backend development experience. You should also have a solid foundation in computer science, with strong knowledge of algorithms, data structures, and system design. Languages & Runtime: JavaScript, TypeScript, Node.js, npm; Cloud & Infrastructure: AWS (Lambda, S3, DynamoDB, RDS, VPC), CDK, Kubernetes, Terraform; Architecture & Patterns: REST API development, API security (authentication, authorization, OWASP best practices), event-driven architecture; Testing & Quality: Jest (unit testing), Cypress (E2E), JMeter (load testing),SonarQube; DevOps & Observability: Git, CI/CD pipelines, Docker, Grafana, Loki, Sentry, OpsGenie; Best Practices: Clean code, secure coding, code reviews, production monitoring, incident response; Special Focus: Experience working with data-intensive and high-traffic applications; Computer Science Fundamentals: Algorithms, data structures, system design. You are not just a developer – you are a team player and a problem solver. We believe you will thrive here if you: • Take responsibility for your work and follow through; • Have strong technical curiosity and a drive to continuously learn; • Are proactive and enjoy taking initiative; • Value collaboration and helping others succeed; • Have experience handling incidents and working with customer service to improve production systems; • Have worked with production-grade systems and understand the importance of quality, reliability, and supportability; • Are fluent in English (required) and preferably also in Swedish; • Are able and willing to work from our Tumba office at least 3 days per week. What is in It for You Competitive salary and benefits; Career development opportunities in a growing tech company; Continuous learning culture: mentorship, internal training, and certifications; Flexible, agile work environment (hybrid in Kraków); Office perks: great coffee, tea, fresh fruit, snacks, and a fun atmosphere; Flat management structure, where your voice matters; Regular team events and a social, supportive work culture; B2B contract or Contract of Mandate (Umowa Zlecenie); 🌟 Why Join Kolomolo? At Kolomolo , we prioritize innovation, agility, and autonomy. Our teams have the freedom to own their work, share ideas, and make meaningful contributions. Inspired by Scandinavian values , we believe in work-life harmony and creating an inclusive culture where everyone thrives. You will be part of a passionate, skilled, and friendly team that works hard and celebrates together. Here, you can build your career on your own terms, with opportunities to grow, learn, and make a real impact. Our Flat Structure & The Culture of Inclusion At Kolomolo, we break the corporate mold. We offer: Agile Teams & Autonomy : No micromanagement. You’ll own your projects and enjoy the freedom to innovate. Work-Life Harmony : Inspired by Scandinavian values, we prioritize balance and flexibility, where remote work and asynchronous collaboration are in our DNA. Learning & Growth : Continuous learning is at our core. We reward hard work, value smart ideas, and foster an environment of mutual respect and trust. Inclusive Culture : We believe in DEI: diversity, equity and inclusion. We are committed to creating an environment where every individual, regardless of background, identity, or experience feels valued, respected, and empowered to thrive. Join Kolomolo and elevate your career with cutting-edge technology, a supportive team, and a company that truly values your input. Ready for the next step? Apply now and start an exciting journey of growth and innovation with us!

🏢 Summary: Full Stack Developer role focused on building and maintaining scalable, cloud-based applications for enterprise data exchange with external government systems. The position involves developing Java (Spring Boot) services, REST APIs, frontend components, and data synchronization processes within a microservices architecture. It includes working in an Agile team and contributing to CI/CD pipelines and automated testing. 🗂️ Requirements: 3+ years experience as Full Stack Developer, Strong proficiency in Java, Experience with Spring Boot, Experience with REST APIs, Experience with microservices architecture, Experience with relational databases, Experience with PostgreSQL, Experience with Node.js, Experience with modern frontend frameworks, Experience with React, Familiarity with CI/CD pipelines, Experience with GitLab CI, Experience with event-driven systems or messaging solutions, Familiarity with AWS, Experience in Agile/Scrum teams 📃 Skills: Java, Spring, SpringBoot, REST, Microservices, PostgreSQL, SQL, Node.js, JavaScript, TypeScript, React, AWS, Git, GitLab, CI/CD, Messaging, Scrum 🏢 Description: 🚀 Java Full Stack Developer (Maternity Cover) Location: Poland - Hybrid (Kraków) Contract: B2B, Full-Time Join the Future of Digital Tech with Kolomolo At Kolomolo , we don’t just follow trends - we set them. As a global supplier of IT services and digital modernization solutions, we help businesses embrace cutting-edge technology to optimize their operations. Now, we are growing and looking for fresh talent to grow with us. Are you proactive, tech-savvy, and eager to build your career in IT? This role could be your perfect fit. About the Role Kolomolo is looking for a Java Full Stack Developer to join an international project team delivering modern digital services for a large-scale, enterprise environment. This is a maternity cover position , offering the opportunity to work on high-impact systems, collaborate with senior engineers, and contribute to the development and maintenance of scalable applications. You will be working on a platform responsible for exchanging operational data between our product and external government systems. The solution enables: Two-way data synchronization (both manual and automated) Visibility into pending work items Access to historical records Validation of both system-generated and manually entered data This is a full-stack role with a strong focus on Java, offering the opportunity to work across the entire application and contribute to its evolution. You will be involved in both backend and frontend development, working within a cloud-based architecture and Agile delivery model. What You’ll Be Doing Designing, building, and maintaining application services and APIs using Java (Spring Boot) Developing and enhancing data synchronization processes and system integrations Extending and maintaining existing application components Ensuring performance, scalability, and reliability of the system Contributing to CI/CD pipelines and deployment processes Writing and maintaining automated tests (unit and integration) Collaborating across the application stack to deliver cohesive solutions Tech Stack Frontend: JavaScript / TypeScript, React (or similar) Backend: Node.js Cloud: AWS (preferred) Architecture: Microservices Tools: Git, CI/CD pipelines, modern testing frameworks What We Are Looking For 3+ years of experience as a Full Stack Developer. Strong proficiency in Java. Experience with REST APIs and microservices architecture. Experience with relational databases (e.g., PostgreSQL) Familiarity with CI/CD pipelines (e.g., GitLab CI) Experience with event-driven systems or messaging solutions Strong grasp of software design, scalability, and performance principles Experience with Node.js on the backend. Experience with modern frontend frameworks (e.g., React). Understanding of REST APIs and web services. Familiarity with cloud environments (AWS preferred). Experience working in Agile/Scrum teams. Strong problem-solving skills and attention to detail. Good communication skills in an international environment. Nice to Have Experience with serverless architecture Knowledge of microservices-based systems Experience with automated testing (unit/integration) Exposure to DevOps practices and CI/CD What is in It for You Competitive salary and benefits. Career development opportunities in a growing tech company. Continuous learning culture: mentorship, internal training, and certifications. Flexible, agile work environment (remote, hybrid, or on-site in Kraków). Office perks: great coffee, tea, fresh fruit, snacks, and a fun atmosphere. Flat management structure, where your voice matters. Regular team events and a social, supportive work culture. B2B contract or Contract of Mandate (Umowa Zlecenie). 🌟 Why Join Kolomolo? At Kolomolo , we prioritize innovation, agility, and autonomy. Our teams have the freedom to own their work, share ideas, and make meaningful contributions. Inspired by Scandinavian values , we believe in work-life harmony and creating an inclusive culture where everyone thrives. You will be part of a passionate, skilled, and friendly team that works hard and celebrates together. Here, you can build your career on your own terms, with opportunities to grow, learn, and make a real impact. Our Flat Structure & The Culture of Inclusion At Kolomolo, we break the corporate mold. We offer: Agile Teams & Autonomy : No micromanagement. You’ll own your projects and enjoy the freedom to innovate. Work-Life Harmony : Inspired by Scandinavian values, we prioritize balance and flexibility, where remote work and asynchronous collaboration are in our DNA. Learning & Growth : Continuous learning is at our core. We reward hard work, value smart ideas, and foster an environment of mutual respect and trust. Inclusive Culture : We believe in DEI: diversity, equity and inclusion. We are committed to creating an environment where every individual, regardless of background, identity, or experience feels valued, respected, and empowered to thrive. Join Kolomolo and elevate your career with cutting-edge technology, a supportive team, and a company that truly values your input. Ready for the next step? Apply now and start an exciting journey of growth and innovation with us!

🏢 Summary: Senior Backend Developer role focused on building and scaling an enterprise-grade internal developer platform for a global financial institution. The position involves designing backend services, contributing to platform architecture, and collaborating with distributed teams in a hybrid Kraków-based environment. Candidates will work with modern platform technologies and DevOps practices to improve developer experience at scale. 🗂️ Requirements: 5+ years of backend development experience, Proficiency in Java, Kotlin, or Node.js, Experience in enterprise or platform environments, Strong communication skills, Ability to work independently in a hybrid setup, Fluent English, Legal right to work in the European Union 📃 Skills: Java, Kotlin, Node.js, DevOps, IaaS, Vercel, Heroku, Coolify 🏢 Description: Ignite the Future of Developer Platforms — Shape Scalable, Enterprise-Grade Solutions! Kraków-based opportunity with hybrid work model (up to 3 days remote/week) As a Senior Backend Developer , you will be working for our client, a leading financial institution, pioneering the development of a cutting-edge internal developer platform. This long-term, multi-year project aims to revolutionize how teams deliver and host their projects at enterprise scale, employing innovative technology akin to Vercel, Heroku, and Coolify. Your expertise will directly impact the creation of a world-class developer experience, fostering agility and efficiency across global teams. Your main responsibilities: Design, develop, and maintain backend services and platform components to ensure robustness and scalability Collaborate with senior management and large developer teams to define platform strategy and drive delivery Contribute to architectural decisions and establish platform standards to support enterprise needs Engage with stakeholders at all levels to gather requirements and communicate technical progress effectively Work across multiple languages and technical domains, applying best practices in development and DevOps Participate in code reviews, testing, and documentation to uphold high-quality standards Maintain a strong focus on security, performance, and maintainability of platform components You're ideal for this role if you have: At least 5 years of professional experience in backend development within enterprise or platform environments Strong proficiency in Java, Kotlin, or Node.js (at least one is a must) Excellent communication skills, capable of engaging both senior management and large developer communities Self-driven attitude with the ability to work independently in a hybrid setting Familiarity with building or working on developer platforms or internal tooling is an advantage Experience working in internationally distributed teams It is a strong plus if you have: Hands-on experience with platforms such as Vercel, Heroku, or Coolify Background in DevOps or infrastructure-as-a-service (IaaS) solutions Language required for the role: Fluent English Eligibility to work in Europe: Only candidates with an existing legal right to work in the European Union 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 Back End JavaScript Developer role focused on building scalable, event-driven backend services for fraud detection and platform integrity. The position involves full ownership of backend solutions within a cross-functional team, designing and implementing high-volume data processing systems in a cloud-based microservices environment. The work directly supports AI-driven fraud prevention for a large-scale global platform. 🗂️ Requirements: 7+ years of backend software development experience, Strong expertise in JavaScript, TypeScript, and Node.js, Experience with AWS services: API Gateway, Lambda, ECS, SQS, SNS, DynamoDB, Experience with Infrastructure as Code using Terraform or CloudFormation, Knowledge of event-driven and microservices architecture, Experience with Serverless Framework, Proficiency in NoSQL databases (DynamoDB), Proficiency in relational databases (PostgreSQL), Experience with CI/CD pipelines (GitHub Actions), Experience with Docker and container orchestration (ECS or Kubernetes) 📃 Skills: JavaScript, TypeScript, Node.js, AWS, API Gateway, Lambda, ECS, SQS, SNS, DynamoDB, Terraform, CloudFormation, Serverless, PostgreSQL, CI/CD, GitHub, Docker, Kubernetes 🏢 Description: Salary range: B2B - up to 43 E/h + VAT 💰 Ciklum is looking for a Senior Back End JavaScript Developer to join our team and work directly with our partner, Trustpilot in Poland. We are a custom product engineering company that supports both multinational organizations and scaling startups to solve their most complex business challenges. With a global team of over 4,000 highly skilled developers, consultants, analysts and product owners, we engineer technology that redefines industries and shapes the way people live. About Trustpilot: Trustpilot is on an incredible journey to become the universal symbol of trust. As the world's largest independent consumer review platform, they bring consumers and businesses together to foster transparency and improvement. With over 300 million reviews and 64 million monthly active users, the work we do together has a massive global impact, helping millions of people make better choices every day. About the role: As a Senior Back End JavaScript Developer, become a part of a cross-functional development team engineering experiences of tomorrow. In this role - you are fully integrated into Trustpilot's feature team. You will join a cross-functional "full ownership" squad where you have a say in the direction of projects and technological choices. This specific project enhances trust and transparency by detecting and preventing fraudulent activities, such as fake reviews, and ensuring policy compliance through AI, data analysis, and scalable fraud detection systems. Your work will directly influence the integrity of the platform for over 64 million monthly users! Responsibilities: Collaborative Development: Work alongside Product, Design, and Data Science in a team that owns its product and codebase from end-to-end End-to-End Ownership: Participate in every stage of the lifecycle: from ideation and design to architecture, implementation, deployment, and maintenance System Design: Drive technical decision-making and build scalable backend services and high-volume data processing solutions for fraud detection using TypeScript Scale & Innovation: Build and maintain secure, distributed cloud services within an event-driven microservices architecture, focusing on backend stability and scalability Team Leadership: Support, coach, and inspire your colleagues with your technical expertise and a problem-solving mindset Requirements: We are looking for seasoned engineers who are passionate about high-quality code and technical excellence: Experience: 7+ years of professional software development experience, with a deep focus on backend engineering Core Tech: Strong, hands-on expertise with JavaScript, TypeScript, and Node.js AWS Infrastructure: Proven experience with API Gateway, Lambda, ECS, SQS, SNS, and DynamoDB, utilizing Infrastructure as Code (Terraform or CloudFormation) Architecture: Deep understanding of event-driven and microservice architectures, specifically using the Serverless Framework Databases: Proficiency with NoSQL (DynamoDB) and Relational databases (PostgreSQL) DevOps & Tooling: Experience with CI/CD (GitHub Actions), Docker, and orchestration tools (ECS, Kubernetes) Desirable: Experience integrating AI/ML models or working with LLMs and Generative AI Familiarity with Google Cloud Platform (GCP) services, specifically BigQuery and Pub/Sub What`s in it for you? Remote Collaboration: Enjoy the flexibility of remote work or join us in our office locations across Europe Human Connection: We value a great atmosphere and host team F2F workshops a few times a year to brainstorm and bond in person Continuous Growth: Benefit from a tailored education path, including internal meetups, a Udemy license, and company-paid certifications Comprehensive Care: We offer medical insurance, mental health programs, and a welcoming, open culture Global Reach: Your work will build solutions used by millions to promote trust and transparency online Be bold, not bored! If you're ready to build the heart of trust with a world-class engineering team, we'd love to see your application.

🏢 Summary: Full-time Senior Frontend Systems Engineer (AI Focused) role focused on building AI-supported frontend systems, reusable UI templates, and internal tools to improve scalability and reduce manual work. The position involves defining frontend standards, ensuring accessibility and performance, and collaborating with global teams to create maintainable, high-quality solutions. This is a hybrid role based in Wrocław with flexible hours and partial PST overlap. 🗂️ Requirements: Minimum 6 years of experience in frontend development, Strong knowledge of React, Experience with at least one additional framework: Vue, Angular, or Svelte, Experience building or maintaining component libraries or design systems, Strong knowledge of HTML5, Strong knowledge of CSS3, Experience with responsive design, Knowledge of accessibility standards (WCAG), Experience optimizing frontend performance, Experience using AI coding tools (e.g., Cursor, Claude, GitHub Copilot), Ability to review and improve AI-generated code for quality and security 📃 Skills: React, Vue, Angular, Svelte, HTML5, CSS3, WCAG, AI, Cursor, Claude, GitHubCopilot, Performance, Accessibility, ResponsiveDesign 🏢 Description: Please Note: Flexible working hours, overlap with PST a few times/week required Hybrid work model (2 days/week from the office in Wrocław) About us We are building the future of customer success with AI, from keeping customers to helping them grow. Our product uses AI to help companies take care of their customers. It supports the whole customer journey, from the first steps to long-term success. More than 2,000 companies trust our product to help customers learn, use features, connect with others, and succeed. About this role We are looking for a full-time Senior Frontend Systems Engineer (AI Focused) to join our Services team. You will report to the Manager of Solutions Engineering. This is a hybrid role based in Wroclaw, Poland. In this job, you will improve how we build frontend solutions for our services. This is not a typical feature development role. You will work with modern AI tools and create reusable UI systems and workflows. These will help our team work faster and more consistently. You will still write code, but you will also design shared systems and patterns that reduce manual work. This role is great for someone who likes building systems that other developers use. You will work closely with teams in the USA and India. This gives you a chance to help set global standards and solve complex technical problems. What you’ll do Build AI-supported frontend systems Create and maintain reusable UI templates and frontend tools used in many projects. Build internal tools that support AI in coding, testing, and documentation. Make sure AI-generated code is fast, accessible, and easy to maintain. Set rules and checks for AI-assisted development, like accessibility and responsive design. Reduce repeated manual work by creating reusable frontend patterns. Stay involved in complex UI work to make sure solutions are practical. Improve scalable customisation Find common frontend problems and turn them into automated solutions. Suggest better architecture to reduce custom work, like shared tools and extension points. Work with product engineers to improve scalability based on real project needs. Use data (like time spent and reuse frequency) to support your ideas. Set frontend standards Define and document best practices for frontend development. Ensure accessibility (WCAG), performance, and code quality are always maintained. Help other engineers learn advanced and responsible use of AI. Promote reusable systems instead of one-time solutions. What we’re looking for At least 6 years of experience building frontend systems with high-quality code. Strong knowledge of React and experience with another framework (Vue, Angular, or Svelte). Experience creating or maintaining shared component libraries or design systems. Strong skills in HTML5, CSS3, responsive design, accessibility, and performance. Experience using AI coding tools (like Cursor, Claude, or GitHub Copilot). Ability to check and improve AI-generated code for quality and security. Ability to work independently and collaborate well with teams. Why you’ll love it here We are a place where people work together, share ideas, and solve real problems. Our product keeps growing in customer success, product experience, and AI solutions. We grow together with our customers. Our culture is based on trust, support, and stability. People feel comfortable being themselves and connected to their work. As a Senior Frontend Systems Engineer, you will work with international teams in the USA and India. This gives you a chance to share knowledge, influence global standards, and solve complex technical challenges.

🏢 Summary: Backend Software Developer and Senior Backend Software Developer roles focused on building and maintaining scalable cloud-native backend services for Toyota’s connected services ecosystem. The position involves designing microservices, APIs, and event-driven architectures using Java, Spring Boot, and cloud platforms while contributing to CI/CD, DevOps, and system reliability. Hybrid work in Wroclaw with benefits including health insurance, sport card, lunch subsidy, language lessons, bonuses, and car leasing. 🗂️ Requirements: Up to 6 years of backend development experience for Software Backend Developer, More than 6 years of development experience for Senior Software Backend Developer, Strong proficiency in Java, Strong proficiency in Spring Boot, Strong proficiency in Python, Experience with microservices architecture, Experience with REST APIs, Experience with gRPC, Experience with event-driven architectures, Experience with Kafka, RabbitMQ, or similar messaging systems, Experience with AWS, Azure, or GCP, Experience with deployment strategies, Experience with GitLab or GitHub, Knowledge of CI/CD pipelines and automated testing, Understanding of cybersecurity standards and GDPR, Team leadership or mentoring experience for Senior role, Bachelor’s or Master’s degree 📃 Skills: Java, Spring, SpringBoot, Python, AWS, Azure, GCP, Kafka, RabbitMQ, GitLab, GitHub, REST, gRPC, CI/CD, DevOps, GDPR, Microservices 🏢 Description: Team description: We Lead the end-to-end development, deployment, and continuous enhancement of Toyota’s connected services ecosystem across European markets. Our work oversees the integration of vehicle connectivity platforms, mobile applications, and cloud-based services, ensuring scalability, security, and seamless user experience. We Collaborate with engineering, product, IT, legal, and external partners to accelerate service rollout and maintain operational excellence. Role Summary: We would like to invite you to join the adventure of expanding TME PL branch in the Toyota Digital HUB in Wroclaw. We are seeking an Senior Backend Software Developer who will take ownership of developing, deploying, and maintaining highly scalable and reliable backend services. You will be a key contributor to the design and architecture of microservices, APIs, and cloud-native solutions. Key Responsibilities: Design, development, and deployment of backend services using Java, Spring Boot, and cloud platforms (AWS). Architect and implement microservices, ensuring high availability, scalability, and maintainability. Collaborate with product managers, architects, and other stakeholders to define system requirements and provide technical solutions. Implement advanced event-driven systems and messaging architectures. Ensure reliability, scalability, and resilience of backend systems in a distributed architecture Drive the adoption of best practices in software development, testing, and deployment. Contribute to CI/CD pipelines, automated testing, and DevOps practices Ensure compliance with cybersecurity standards and data privacy regulations (e.g., GDPR) Contribute to architecture decisions, code reviews, and best practices Qualifications & Skills What we require: For Mid Software Backend Developer up to 6 years of experience is Software backend Development. For Senior Software Backend Developer: more than 6 years Development For Senior Software Backend Developer: more than 6 years Development Strong proficiency in Java, Spring Boot, and Python. Deep understanding of microservices, REST APIs, gRPC, and event-driven architectures (Kafka, RabbitMQ, or similar messaging systems). Expertise in microservices architecture (service decomposition, resilience, scalability) Experience with one of cloud technologies (AWS, Azure, GCP) and deployment strategies. Strong expertise in version control systems such as GitLab or GitHub. For Snr Software Backend developer: Experience in leading teams or mentoring junior developers. Strong problem-solving and analytical skills. Additional requirements (considered an advantage): Understanding of connected vehicle ecosystems in automotive industry You have a  TOYOTA DNA, this means: Courage: you are ready to let go of the easy path to reach challenging targets Creativity: your passion drives you to explore innovative ideas and challenge the impossible Coaching: you share knowledge and feedback with your colleagues and celebrate each other's success Curiosity: you are open for new experience and able to combine imagination with fact-based observation Collaboration: you are a team player, respectful and inclusive in your style and you take a customer-oriented approach Formal Role Details: Job Type:  undefined time contract Starting date: Position available since May 2026 Location: Wroclaw, Silver Tower Office Center Working Pattern: Hybrid è 2 days every 2 weeks (flexible), in line with the need Reporting line: Manager / Team Lead Education level required: Bachelor/Master What we can offer you: Health insurance Sport card Lunch subsidy Car leasing Languages lessons Bonuses

🏢 Summary: Senior Backend Developer role focused on building and maintaining internal banking architecture tooling using Java and Node.js in a hybrid Krakow-based environment. The position involves developing backend services, APIs, web UI components, and AI-agent orchestration solutions to support enterprise-scale digital transformation. Candidates should have strong software engineering experience, database expertise, and knowledge of modern integration and automation practices. 🗂️ Requirements: 5+ years of software engineering experience, Strong expertise in Node.js, Strong expertise in Java, Experience with relational databases, Proficiency in PostgreSQL, Experience with JavaScript/TypeScript frameworks, Knowledge of agentic application engineering, Experience with MCP integration patterns, API design experience, Experience with tool/function calling, Production engineering mindset, Solution design skills, Fluent English, Legal right to work in the European Union 📃 Skills: Java, Node.js, PostgreSQL, JavaScript, TypeScript, MCP, API, SQL, AI, DevOps 🏢 Description: Empower innovative architecture tools — shape the future of banking technology! Krakow-based opportunity with hybrid work model (up to 3 remote days per week). As a Senior Backend Developer – Java and Node.js Platforms , you will be working for our client, a leading international bank. You’ll contribute to designing, building, and maintaining cutting-edge internal tooling that supports the bank’s Future State Architecture across CTO Platforms. Your work will enable seamless integration of data, workflows, and autonomous AI agents, helping redefine technology governance at scale and driving digital transformation. Your main responsibilities: Design, develop, and maintain reliable internal tooling supporting Future State Architecture (FSA) with a focus on security, resilience, and usability. Build backend services and APIs using Node.js and/or Java, integrating with PostgreSQL and other enterprise data sources. Develop web UI components utilizing modern JavaScript/TypeScript frameworks to deliver intuitive user workflows. Apply agentic engineering practices to orchestrate autonomous AI agents for building, testing, and deploying software. Implement secure, efficient integration patterns (e.g., MCP, API design, tool/function calling) across the architecture ecosystem. Collaborate with architects, platform engineers, and stakeholders to translate architectural needs into effective technical solutions. Ensure solutions adhere to client's engineering standards, including testing, performance, security, and operational readiness. Support continuous improvement initiatives through automation, code reviews, and operational support for live systems. You're ideal for this role if you have: At least 5 years of experience in software engineering, with strong expertise in Node.js and/or Java . Proficiency with relational databases , particularly PostgreSQL (data modeling, query optimization). Web UI development experience with modern JavaScript/TypeScript frameworks . Knowledge of agentic application engineering , including orchestration of autonomous AI agents. Experience with integration patterns such as MCP , API design , and tool/function calling . A production engineering mindset, emphasizing security, resilience, performance, and observability . Solution design skills for internal platforms and tooling. Excellent English communication skills and proven experience in stakeholder collaboration within a global environment. It is a strong plus if you have: Certifications or experience in automation, DevOps, or related fields. Additional familiarity with cloud services or enterprise architecture frameworks. Language Required for the role: Fluent English (spoken and written). Eligibility to work in: Only candidates with an existing legal right to work in the European Union 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 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: 6-month full-time Graduate Program focused on backend development for modern web and e-commerce platforms. Participants gain hands-on experience building scalable backend applications, APIs, and AI-enabled features using contemporary technologies under senior developer guidance. The program includes practical work with databases, cloud environments, and collaborative product teams. 🗂️ Requirements: Solid understanding of backend development fundamentals, Basic knowledge of object-oriented programming, Hands-on experience or exposure to .NET, Java or Node.js, Understanding of REST API design and server-client communication, Basic knowledge of SQL databases, Basic knowledge of NoSQL databases, Familiarity with Git, Basic understanding of cloud concepts (deployments, environments, scalability), Ability to use AI tools for code generation, refactoring and debugging, Very good English (B2 or higher) 📃 Skills: .NET, Java, Node.js, TypeScript, REST, SQL, NoSQL, Git, Cloud, AI, OOP 🏢 Description: At Columbus , we don’t just implement technology - we give it a human dimension. As a global consultancy, we help organizations create real business value through digital transformation. In Poland, our Digital Commerce team designs and builds modern e-commerce platforms for our Scandinavian customers, providing the technology capabilities and engineering excellence. Location: Wrocław (4 days per week at the office) Start Date: July 2026 (6-month program, full-time) What You'll learn with us This is more than a junior role - it’s a 6-month structured Graduate Program designed to give you real skills and experience in IT. Under the guidance of experienced developers, you will learn how to: Build backend applications for modern web and e-commerce platforms (.NET, Java, Typescript or Node.js) Design and develop REST APIs and handle server-client communication Work with databases (SQL and NoSQL) and understand data modelling basics Build secure, scalable, and performant backend solutions Develop AI-enabled features and use AI tools to improve development workflow Collaborate with frontend developers, QA, product managers, and AI specialists Gain practical knowledge of cloud platforms, deployments, and environments What we’re looking for Solid understanding of backend development fundamentals , regardless of formal education background. Basic knowledge of object-oriented programming concepts and good engineering practices General knowledge of backend technologies , with hands-on experience or learning exposure to at least one of the following ecosystems: .NET, Java or Node.js Openness to working with various backend technologies and readiness to quickly learn and adapt to new languages, frameworks, and tools based on project and team needs. Understanding of API design and server-client communication (REST). Basic knowledge of SQL databases (e.g. relational concepts, queries, transactions) and NoSQL databases (e.g. document or key-value stores, use cases) Familiarity with Git Basic awareness of cloud concepts , such as deployments, environments, configuration, and scalability. Ability to use AI tools to support backend development (e.g. code generation, refactoring, debugging, log analysis). Engineering mindset with strong problem-solving and analytical skills . Very good English communication skills (at least B2 level). Curiosity, passion for technology , and a strong motivation for continuous learning. What's in it for You First and foremost - you’ll build, learn, ask, try, fail, improve - and actually grow with us. Additionally, we offer: Competitive compensation from day one: 8 000 – 10 000 PLN gross/month (Employment Contract). Practical e-commerce experience with AI-driven development. Participation in Columbus global accelerator network: you'll join online training sessions and a 3-day trip to our HQ in Ballerup, Denmark to meet other accelerators from around the world! 2 500 PLN for personal development budget Great benefits package, including the MyBenefit platform (e.g., Multisport, cinema tickets, vouchers), Luxmed, and life insurance. Opportunity to participate in company events, weekly team lunches, and fun team-building activities. We believe great teams are built by people with different perspectives and experiences. If you have a solid foundation and motivation to learn, we encourage you to apply!

🏢 Summary: Senior Full Stack Developer role focused on building scalable, secure cloud-native applications across the full stack. The position involves backend and frontend development, as well as deploying and managing solutions on Microsoft Azure using containerization technologies. Hybrid work model with 3 days per week on-site in Wroclaw. 🗂️ Requirements: Expert-level experience in at least 3 of: Java, Python, Hands-on experience with Azure, Hands-on experience with Kubernetes, Hands-on experience with TypeScript, Hands-on experience with React, Hands-on experience with Rust or Node.js, Extensive experience with Microsoft Azure cloud platform, Strong proficiency in multiple programming languages and frameworks, Experience working in agile development environments 📃 Skills: Java, Python, Rust, Node.js, React, TypeScript, Azure, Kubernetes, Cloud, DevOps 🏢 Description: We are seeking a versatile and experienced Senior Full Stack Developer to join our dynamic team working on cutting-edge cloud-native applications. This role involves developing scalable, secure, and high-performance solutions using modern technologies across the full technology stack. You will work on innovative projects that leverage cloud platforms and containerization technologies to deliver exceptional user experiences Our client is a leading technology company focused on building next-generation digital solutions. They are committed to innovation and excellence in delivering cloud-based applications that serve millions of users worldwide. This role offers a hybrid model with 3 days per week working from the client's office in Wroclaw, Poland Ready to launch your career in cloud engineering? Apply now and join our global team. Responsibilities Design and develop robust backend services using Java, Python, Rust or Node.js Build responsive and intuitive front-end interfaces with React and TypeScript Architect and deploy cloud-native applications on the Microsoft Azure platform Manage infrastructure as code using Terraform and modern DevOps practices Orchestrate and maintain containerized applications with Kubernetes Collaborate with cross-functional teams to deliver comprehensive end-to-end solutions Requirements Expert-level experience in at least 3 of the following technologies: Java and/or Python Hands-on experience with: Azure, Kubernetes, TypeScript, React, Rust, Node.js Strong proficiency in multiple programming languages and frameworks Extensive experience with cloud platforms, particularly Microsoft Azure Proven ability to work effectively in fast-paced agile development environments Strong problem-solving skills and attention to detail Excellent communication and collaboration abilities Nice to have Experience with infrastructure as code tools like Terraform Knowledge of DevOps practices and CI/CD pipelines Understanding of microservices architecture patterns Experience with containerization and orchestration technologies Familiarity with modern software development methodologies and best practices Previous experience working in cross-functional international teams We offer/Benefits We gather like-minded people: Engineering community of industry professionals Friendly team and enjoyable working environment Flexible schedule and opportunity to work remotely within Poland Chance to work abroad for up to 60 days annually Business-driven relocation opportunities We provide growth opportunities: Outstanding career roadmap Leadership development, career advising, soft skills, and well-being programs Certification (GCP, Azure, AWS) Unlimited access to LinkedIn Learning, Get Abstract, Cloud Guru English classes We cover it all: Stable income (Employment Contract or B2B) Participation in the Employee Stock Purchase Plan Benefits package (health insurance, multisport, shopping vouchers) Strategically located offices featuring entertainment and relaxation zones, table tennis and football, free snacks, fantastic coffee, and more Referral bonuses Corporate, social and well-being events Please, note: The set of bonuses might vary based on the role you apply for – specifics will be discussed with our recruiter during the general interview. We will reach out to selected candidates exclusively. EPAM is a leading global provider of digital platform engineering and development services. We are committed to having a positive impact on our customers, our employees, and our communities. We embrace a dynamic and inclusive culture. Here you will collaborate with multi-national teams, contribute to a myriad of innovative projects that deliver the most creative and cutting-edge solutions, and have an opportunity to continuously learn and grow. No matter where you are located, you will join a dedicated, creative, and diverse community that will help you discover your fullest potential.