Senior Software Engineer (node.js backend)

🏢 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: Senior Backend Engineer: Node.js & AWS Location: Kraków, Poland Working model: Hybrid Contract: Employment agreement or B2B Build high-scale systems from the beginning We’re hiring an experienced backend engineer to join a growing international technology business as it expands its engineering presence in Kraków. This is an opportunity to help create a new product rather than inherit a finished roadmap. You’ll influence early technical decisions, build systems designed for demanding workloads, and take meaningful ownership from architecture through production. The company develops robust data infrastructure used by organizations operating in complex, high-stakes environments. Its technology processes large volumes of information and supports products where speed, availability, and accuracy genuinely matter. If you enjoy solving difficult engineering problems, making pragmatic architectural decisions, and seeing your work reach production, this role offers plenty of room to make an impact. 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 Back-end Developer role focused on designing secure, reliable Node.js/TypeScript backends for real-time automated decision-making. The position involves microservices, databases, APIs, cloud deployments, automated testing, production support, and AI-assisted development in an agile international team. 🗂️ Requirements: 5+ years of Node.js, JavaScript, and TypeScript experience, Relational database experience, Microservices and system design knowledge, Test pyramid implementation experience, Security best practices, AI-assisted development tool proficiency, English proficiency, Afternoon/evening availability for cross-time-zone collaboration 📃 Skills: Node.js, JavaScript, TypeScript, PostgreSQL, MySQL, Docker, Kubernetes, AWS, Fargate, Lambda, Nest.js, Cursor, Devin 🏢 Description: Senior Back-end Developer (Node.js / TypeScript) About the Role We are looking for a Senior Back-end Developer to join our client's team. You will architect and implement robust backends, interacting with various data stores and third-party APIs to support real-time automated decision-making. Working in an agile, multinational environment, you'll have huge creative freedom and ownership over your projects while collaborating closely with Product Managers, Senior Engineers, and Architects. Key Responsibilities Architect and implement backends and their interactions with data stores and APIs. Support reliable databases and APIs for real-time automated decision-making. Deploy software using industry-standard tooling like Kubernetes clusters and AWS Lambda functions. Investigate and resolve production issues, implementing timely fixes to minimize user impact. Focus heavily on security, following Defense in Depth principles and ensuring containers are secure. Implement robust automated test suites (unit, integration, and e2e) to maintain a low failure rate. Leverage AI-assisted development tools (such as Cursor, Claude Code, or Devin) as a core part of your daily workflow to accelerate speed and quality. Requirements 5+ years of hands-on experience with Node.js, JavaScript, and TypeScript . Practical knowledge of at least one relational database system (e.g., PostgreSQL, MySQL, or SQL Server). Adept with microservices and system design patterns. Experience implementing the test pyramid and utilizing good security practices. Strong sense of ownership, independence, and the ability to clearly convey ideas across technical and non-technical teams. Comfort with AI-assisted development tools as a core part of your setup. Good command of English (written and spoken). Availability in the afternoons/evenings for occasional alignment with multinational teams across time zones. Tech Stack & Tools Backend: Node.js, TypeScript, Nest.js Cloud & DevOps: Docker, Kubernetes, AWS (Fargate, Lambda) Testing: Automated software testing (unit, integration, e2e) AI Tools: Cursor, Claude Code, Devin (autonomous AI engineer) Nice-to-Haves Familiarity with Docker/Kubernetes/AWS deployment processes. Experience with profiling and performance optimization. Experience giving high-quality feedback during code reviews.

🏢 Summary: Senior Full-stack Developer role focused on building Node.js microservices and REST APIs, contributing to Angular front ends, and modernizing legacy platforms into scalable AWS cloud-native solutions. The position owns the full delivery lifecycle, provides technical leadership and mentoring, and requires hybrid work from Gdansk or Krakow three days per week. 🗂️ Requirements: Bachelor’s degree in Computer Science, Engineering, or related field, 5+ years of professional software development experience, Leadership experience building production-grade systems, Expertise in Node.js, microservices, REST API design, and full-stack development, Angular development experience, Legacy-system modernization and target-state architecture design experience, Hands-on AWS cloud services experience, Relational and NoSQL database experience, Monitoring, observability, and automated testing experience, Agile delivery experience, Hybrid work from Gdansk or Krakow 3 days per week 📃 Skills: Node.js, Angular, Java, JavaScript, AWS, EC2, S3, Lambda, Kinesis, Firehose, DynamoDB, EKS, CloudWatch, PostgreSQL, Splunk, Honeycomb, Playwright, DB2, REST, Microservices 🏢 Description: We're looking for a Senior Full-stack Developer (Node.js, Angular, Java, JavaScript) to join our team in Poland. The ideal candidate thrives on solving complex problems, modernizing legacy platforms, and delivering robust cloud-native solutions. In this role, you’ll be hands-on with the full technology stack—shaping architecture, leading development efforts, and partnering closely with cross-functional teams to drive strategic initiatives forward. If you are an engineer who enjoys both the technical and collaborative aspects of building software at scale, we’d love to meet you. Please note that hybrid work, 3 days from Gdansk or Krakow, is required. Responsibilities Design, develop, and deploy backend services, microservices, and RESTful APIs—primarily in Node.js—with front-end contributions in Angular Modernize legacy systems by evaluating current-state architectures and defining target-state solutions that maximize performance, scalability, and maintainability Deliver high-quality software in an agile environment, partnering closely with product managers, architects, and other engineering teams Own the end-to-end development lifecycle: requirements gathering, solution design, coding, testing (including API and Playwright automation), deployment, and operational support Implement and manage AWS cloud services (e.g., EC2, S3, Lambda, Kinesis, Firehose, DynamoDB, EKS, CloudWatch) to build resilient, observable, and secure solutions Promote best practices in coding standards, testing, monitoring (via Splunk, Honeycomb), and documentation Mentor and guide engineers, fostering a culture of technical excellence, ownership, and continuous improvement Engage directly with clients and stakeholders, translating broad, ambiguous business needs into concrete technical plans Requirements Bachelor's degree in Computer Science, Engineering, or related field; Master's degree strongly preferred 5+ years of professional software development experience, with demonstrated leadership in building production-grade systems Deep expertise in Node.js, microservices architecture, REST API design, and full-stack development (Angular contributing to ~20% of workload) Proven success modernizing legacy systems, assessing current architectures, and defining target-state designs Hands-on experience with AWS cloud services (EC2, S3, Lambda, Kinesis, Firehose, DynamoDB, EKS, CloudWatch, and related tools) Experience with relational and NoSQL databases (DynamoDB, PostgreSQL); familiarity with DB2 is a plus Proficiency using modern monitoring and observability platforms (Splunk, Honeycomb) and automated testing frameworks (API testing tools, Playwright) Strong command of agile methodologies and iterative delivery Nice to have Exposure to Java for DB2 integration and legacy system interfacing Experience leading cross-functional initiatives in large enterprise environments Familiarity with API management, security, and governance best practices Experience with Playwright We offer We gather like-minded people: Top tech minds driving innovation in AI, cloud and digital platform modernization Supportive team and agile, startup-like culture Hybrid by design mode 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: Career development programs Thought leadership, mentoring, soft skills and well-being programs Certification (Anthropic, Gemini, GCP, Azure, AWS) English classes We cover it all: Stable pay Participation in the Employee Stock Purchase Plan with a 15% discount Benefits package (health insurance, multisport, shopping vouchers) Referral bonuses up to $2,000 Offices featuring entertainment and relaxation zones, table tennis and football, free snacks, coffee and more Corporate, social and well-being events Please, note: Benefits listed above are available to employees only We are open for working with Contractors. Terms of B2B cooperation agreements are agreed individually We will reach out to selected candidates exclusively EPAM is global leader in AI transformation engineering and integrated consulting, serving Forbes Global 2000 companies and ambitious startups. With over thirty years of expertise in custom software, product and platform engineering, we empower our clients to become AI-Native enterprises, driving measurable value from innovation and digital investments.

🏢 Summary: Senior Full-stack Developer role focused on designing and modernizing cloud-native applications with Node.js and Angular. The position owns the full delivery lifecycle, including architecture, AWS implementation, automated testing, and operational support, while collaborating with clients and mentoring engineers. Hybrid work from Gdansk or Krakow three days per week is required. 🗂️ Requirements: Bachelor’s degree in Computer Science, Engineering, or related field, 5+ years of professional software development experience, Leadership experience building production-grade systems, Deep Node.js expertise, Microservices architecture experience, REST API design experience, Full-stack development experience with Angular, Legacy-system modernization and target-state architecture design experience, Hands-on AWS services experience, Relational and NoSQL database experience, Monitoring, observability, and automated testing experience, Agile delivery proficiency, Hybrid work from Gdansk or Krakow 3 days per week 📃 Skills: Node.js, Angular, Java, JavaScript, AWS, EC2, S3, Lambda, Kinesis, Firehose, DynamoDB, EKS, CloudWatch, PostgreSQL, Splunk, Honeycomb, Playwright, DB2 🏢 Description: We're looking for a Senior Full-stack Developer (Node.js, Angular, Java, JavaScript) to join our team in Poland. The ideal candidate thrives on solving complex problems, modernizing legacy platforms, and delivering robust cloud-native solutions. In this role, you’ll be hands-on with the full technology stack—shaping architecture, leading development efforts, and partnering closely with cross-functional teams to drive strategic initiatives forward. If you are an engineer who enjoys both the technical and collaborative aspects of building software at scale, we’d love to meet you. Please note that hybrid work, 3 days from Gdansk or Krakow, is required. Responsibilities Design, develop, and deploy backend services, microservices, and RESTful APIs—primarily in Node.js—with front-end contributions in Angular Modernize legacy systems by evaluating current-state architectures and defining target-state solutions that maximize performance, scalability, and maintainability Deliver high-quality software in an agile environment, partnering closely with product managers, architects, and other engineering teams Own the end-to-end development lifecycle: requirements gathering, solution design, coding, testing (including API and Playwright automation), deployment, and operational support Implement and manage AWS cloud services (e.g., EC2, S3, Lambda, Kinesis, Firehose, DynamoDB, EKS, CloudWatch) to build resilient, observable, and secure solutions Promote best practices in coding standards, testing, monitoring (via Splunk, Honeycomb), and documentation Mentor and guide engineers, fostering a culture of technical excellence, ownership, and continuous improvement Engage directly with clients and stakeholders, translating broad, ambiguous business needs into concrete technical plans Requirements Bachelor's degree in Computer Science, Engineering, or related field; Master's degree strongly preferred 5+ years of professional software development experience, with demonstrated leadership in building production-grade systems Deep expertise in Node.js, microservices architecture, REST API design, and full-stack development (Angular contributing to ~20% of workload) Proven success modernizing legacy systems, assessing current architectures, and defining target-state designs Hands-on experience with AWS cloud services (EC2, S3, Lambda, Kinesis, Firehose, DynamoDB, EKS, CloudWatch, and related tools) Experience with relational and NoSQL databases (DynamoDB, PostgreSQL); familiarity with DB2 is a plus Proficiency using modern monitoring and observability platforms (Splunk, Honeycomb) and automated testing frameworks (API testing tools, Playwright) Strong command of agile methodologies and iterative delivery Nice to have Exposure to Java for DB2 integration and legacy system interfacing Experience leading cross-functional initiatives in large enterprise environments Familiarity with API management, security, and governance best practices Experience with Playwright We offer We gather like-minded people: Top tech minds driving innovation in AI, cloud and digital platform modernization Supportive team and agile, startup-like culture Hybrid by design mode 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: Career development programs Thought leadership, mentoring, soft skills and well-being programs Certification (Anthropic, Gemini, GCP, Azure, AWS) English classes We cover it all: Stable pay Participation in the Employee Stock Purchase Plan with a 15% discount Benefits package (health insurance, multisport, shopping vouchers) Referral bonuses up to $2,000 Offices featuring entertainment and relaxation zones, table tennis and football, free snacks, coffee and more Corporate, social and well-being events Please, note: Benefits listed above are available to employees only We are open for working with Contractors. Terms of B2B cooperation agreements are agreed individually We will reach out to selected candidates exclusively EPAM is global leader in AI transformation engineering and integrated consulting, serving Forbes Global 2000 companies and ambitious startups. With over thirty years of expertise in custom software, product and platform engineering, we empower our clients to become AI-Native enterprises, driving measurable value from innovation and digital investments.

🏢 Summary: Full-time Senior Backend Developer role building a modern, large-scale enterprise platform for a global manufacturing customer. The position focuses on Node.js/TypeScript backend services, REST APIs, enterprise integrations, database design, and secure, scalable application delivery, with planned work through December 2026 and a possible extension to February 2027. 🗂️ Requirements: 7+ years of software development experience, 5+ years of Node.js backend development experience, TypeScript and JavaScript proficiency, RESTful API design and development knowledge, Enterprise-scale web application development experience, Software architecture and design patterns knowledge, Relational database experience, Secure coding and application security knowledge, Agile development experience, Advanced English, Availability for business trips to Basel, Switzerland 📃 Skills: Node.js, TypeScript, JavaScript, REST, PostgreSQL, SQL, Agile 🏢 Description: Svitla Systems Inc. is looking for a Senior Backend Developer (Node.js) for a full-time position (40 hours per week) in Europe . Our client is a leading multinational company in the building materials industry. You'll join the implementation of a large-scale enterprise web application for a global manufacturing customer. The project focuses on developing and implementing a modern enterprise platform that will replace an existing business application used across multiple countries. The backend solution will be built using modern technologies and integrated with various enterprise systems to support business-critical processes. The project's planned end date is December 18, 2026, with a possible extension to February 01, 2027. Requirements 7+ years of experience in software development. 5+ years of experience developing backend applications using Node.js. Strong knowledge of TypeScript and JavaScript. Understanding of designing and developing RESTful APIs. Experience with enterprise-scale web application development. In-depth understanding of software architecture principles and design patterns. Knowledge of relational databases (PostgreSQL, SQL Server, or similar). Understanding of secure coding practices and application security principles. Experience working in Agile software development environments. Strong analytical and problem-solving skills. Advanced English. Availability for business trips to Basel, Switzerland, during key project phases (Kick-off, end of Concept Phase, and Go-Live readiness review). Responsibilities Develop scalable backend services using Node.js and TypeScript. Implement RESTful APIs and backend business logic for enterprise web applications. Collaborate with architects to define technical solutions and application architecture. Participate in technical design sessions and solution discussions. Integrate backend services with internal and third-party enterprise systems. Design and optimize database structures, queries, and data models. Ensure application performance, scalability, reliability, and security. Write clean, maintainable, and well-tested code following engineering best practices. Participate in code reviews. Collaborate closely with Front End Developers, QA Engineers, Business Analysts, and DevOps Engineers. Participate in Agile ceremonies including sprint planning, daily stand-ups, reviews, and retrospectives. We offer US and EU projects based on advanced technologies. Competitive compensation based on skills and experience. Regular performance appraisals to support your growth. Flexibility in workspace, either remote or our welcoming office. Bonuses for article writing, public talks, and other activities. Generous time off, including vacation, national holidays, sick leaves, and family days. Personalized learning programs tailored to your interests and skill development. Free tech webinars and meetups organized by Svitla. Regular corporate online activities. Awesome team and a friendly, supportive community!