Senior TypeScript/Node.js Developer (Swedish Ad Platform)

🏢 Summary: Senior TypeScript/Node.js Developer role focused on transforming a global AdTech product into a scalable, platform-first, API-driven microservices architecture. The position involves designing high-performance serverless solutions on AWS, enforcing strict API standards, and ensuring multi-tenant data isolation. You will drive architectural decisions to build reusable, scalable services powering millions of transactions worldwide. 🗂️ Requirements: 7+ years production experience as Back-End Developer, Strong expertise in TypeScript and Node.js, Experience designing API-first microservice architectures, Deep knowledge of AWS serverless (Lambda, API Gateway, DynamoDB, EventBridge), Experience with IaC tools (CloudFormation or Terraform), Experience designing RESTful and GraphQL APIs with versioning and backward compatibility, Understanding of multi-tenant architecture and logical data isolation, Knowledge of AdTech data models and workflows, Focus on performance, reliability, and observability in distributed systems, Upper-Intermediate English level 📃 Skills: TypeScript, Node.js, AWS, Lambda, APIGateway, DynamoDB, EventBridge, CloudFormation, Terraform, REST, GraphQL, OpenAPI, JWT, AdCP, Microservices, Serverless, IaC 🏢 Description: Are you passionate about building high-performance platforms that serve millions of users worldwide? We are looking for a Senior TypeScript/Node.js Developer to join our team and help transform a global AdTech product into a scalable, platform-first architecture. At Sigma Software, we value engineering excellence, innovation, and collaboration, offering the opportunity to work on cutting-edge projects with world-class customers. You will have the chance to work with advanced AWS serverless solutions, contribute to strategic architectural decisions, and enjoy a supportive environment with professional growth opportunities. CUSTOMER Our Customer is a Sweden-based AdTech company specializing in advanced self-serve advertising platforms that automate direct transactions between advertisers and major global publishers. Their technology removes traditional friction in ad sales by enabling automation, transparency, and operational efficiency at scale. Platforms are trusted by internationally recognized publishers including TripAdvisor, Bloomberg, The Washington Post, Opera, and Dow Jones, handling millions of transactions worldwide. PROJECT The project is a strategic architectural transformation toward a Platform-First approach. The company is transitioning from monolithic, client-specific implementations to a standardized, API-driven, multi-tenant ecosystem of reusable microservices. These services power the entire product suite, remaining independent, scalable, and decoupled from frontend or customer-specific customization. Key Technologies: TypeScript, Node.js, AWS Lambda, API Gateway, DynamoDB, EventBridge, IaC tools (CloudFormation or Terraform), RESTful/GraphQL APIs. RESPONSIBILITIES Own and govern API design by defining and maintaining strict OpenAPI specifications before implementation begins Design and implement high-performance microservices using TypeScript and Node.js within a serverless AWS architecture Drive FinOps excellence by architecting solutions with AWS Lambda, API Gateway, DynamoDB, and EventBridge to achieve a Scale-to-Zero cost model Enforce logical isolation patterns across services, ensuring strict tenant data separation via JWT policies and Row-Level Security Maintain adherence to the Ad Context Protocol (AdCP) across all data models for consistent AdTech data language Develop reusable “Golden Path” templates, shared libraries, and engineering best practices Conduct rigorous code reviews focusing on latency (<200ms), availability (99.99%), and observability Translate product and commercial requirements into scalable technical specifications Contribute to evolving the overall platform architecture toward standardization and reusability REQUIREMENTS At least 7 years of production experience as a Back-End Developer Strong hands-on expertise with TypeScript and Node.js Proven experience designing API-first microservice architectures Deep expertise in AWS serverless ecosystem: Lambda, API Gateway, DynamoDB, EventBridge, and IaC tools (CloudFormation or Terraform) Solid AdTech domain knowledge, including advertising data models and workflows Extensive experience designing RESTful and GraphQL APIs with versioning, backward compatibility, and documentation Strong understanding of multi-tenant architecture and logical data isolation patterns Experience building standardized platforms for multiple clients instead of custom solutions Strong focus on performance, reliability, and observability in distributed systems At least an Upper-Intermediate level of English WILL BE A PLUS Experience as a Lead Back-End Developer PERSONAL PROFILE Proactive and detail-oriented with a strong sense of ownership Enjoys solving complex architectural challenges Thrives in collaborative, cross-functional teams Committed to delivering high-quality solutions meeting demanding performance and reliability standards

🏢 Summary: Senior TypeScript/Vue.js Developer role focused on leading front-end architecture for a next-generation AdTech platform transitioning from a monolithic system to a scalable, API-driven ecosystem. The position involves designing high-performance, modular Vue 3 applications, collaborating on API contracts, and deploying solutions within a microservices-based AWS environment. The role combines hands-on development, architectural ownership, and technical leadership. 🗂️ Requirements: 7+ years JavaScript experience, Strong Vue.js expertise, Strong TypeScript expertise, Deep knowledge of Vue3 CompositionAPI, Experience designing API contracts with backend teams, Experience with complex asynchronous data flows, Experience deploying frontend applications in AWS, Hands-on experience with Vite, Hands-on experience with Cypress, Hands-on experience with Vitest, AdTech domain knowledge, Upper-Intermediate English 📃 Skills: JavaScript, TypeScript, Vue, Vue3, CompositionAPI, AWS, Vite, Cypress, Vitest, APIs, Microservices, DevOps, AdTech, Architecture, Testing 🏢 Description: Are you passionate about building scalable, high-performance front-end solutions? At Sigma Software, we are looking for a Senior TypeScript/Vue.js Developer to join our distributed team and help shape the future of a next-generation AdTech platform. You will work alongside talented engineers and contribute to transforming a complex monolithic system into a modern, API-driven architecture. We at Sigma Software value innovation, collaboration, and professional growth. Joining us means working on impactful projects with global reach, while enjoying a supportive environment that encourages learning and knowledge sharing. Customer Our Customer is a Swedish AdTech company that transforms the way publishers and advertisers interact. They provide state-of-the-art self-serve advertising platforms that enable seamless, direct transactions between advertisers and some of the world’s largest publishers. Their mission is to make advertising more accessible, automated, and efficient through innovative technology. Together, we serve globally recognized clients, including TripAdvisor, Bloomberg, The Washington Post, Opera, Dow Jones, etc. Project The project represents a strategic transition to a Platform-First, API-driven architecture. The company is moving away from monolithic, client-specific codebases to a standardized ecosystem. As a Senior TypeScript/Vue.js Developer, you will be the technical visionary for the platforms, ensuring the technology remains high-performing and scalable. Responsibilities Define and lead front-end architecture strategy using Vue 3 with TypeScript, focusing on modularity, scalability, and performance Collaborate with the Platform Team to design, document, and enforce API contracts optimized for low-latency AdTech requirements Participate in system design to align front-end requirements with back-end architecture, supporting complex UI states and asynchronous data flows Partner with DevOps to deploy and scale front-end solutions in AWS, ensuring smooth integration within a microservices ecosystem Mentor and guide engineering teams, promoting an API-first mindset and rigorous TypeScript usage Requirements At least 7 years of hands-on experience in JavaScript and modern front-end development Strong expertise in Vue.js and TypeScript, including deep knowledge of Vue 3 Composition API Proven ability to collaborate with back-end/platform teams to design robust API contracts and manage complex data orchestration Experience deploying and scaling front-end applications in AWS environments Hands-on experience with Vite and modern testing tools (Cypress, Vitest) Solid AdTech domain knowledge, including advertising data models and workflows Upper-Intermediate English proficiency Personal Profile Strong leadership and mentoring skills Excellent communication and collaboration abilities Analytical mindset with a focus on scalability and maintainability

🏢 Summary: Senior TypeScript/Vue.js Developer role focused on leading front-end architecture for a next-generation AdTech platform transitioning from monolithic to API-driven architecture. The position involves building scalable, high-performance Vue 3 applications, defining API contracts, and ensuring seamless integration within a microservices ecosystem on AWS. You will drive technical strategy and support modernization of a complex advertising platform. 🗂️ Requirements: 7+ years of JavaScript and modern front-end development experience, Strong expertise in Vue.js and TypeScript, Deep knowledge of Vue 3 Composition API, Experience designing and integrating API contracts with back-end teams, Experience with AWS deployment and scaling of front-end applications, Hands-on experience with Vite, Experience with Cypress and Vitest, AdTech domain knowledge including advertising data models and workflows 📃 Skills: JavaScript, TypeScript, Vue, Vue3, CompositionAPI, AWS, Vite, Cypress, Vitest, APIs, Microservices, AdTech 🏢 Description: Are you passionate about building scalable, high-performance front-end solutions? At Sigma Software, we are looking for a Senior TypeScript/Vue.js Developer to join our distributed team and help shape the future of a next-generation AdTech platform. You will work alongside talented engineers and contribute to transforming a complex monolithic system into a modern, API-driven architecture. We at Sigma Software value innovation, collaboration, and professional growth. Joining us means working on impactful projects with global reach, while enjoying a supportive environment that encourages learning and knowledge sharing. Customer Our Customer is a Swedish AdTech company that transforms the way publishers and advertisers interact. They provide state-of-the-art self-serve advertising platforms that enable seamless, direct transactions between advertisers and some of the world’s largest publishers. Their mission is to make advertising more accessible, automated, and efficient through innovative technology. Together, we serve globally recognized clients, including TripAdvisor, Bloomberg, The Washington Post, Opera, Dow Jones, etc. Project The project represents a strategic transition to a Platform-First, API-driven architecture. The company is moving away from monolithic, client-specific codebases to a standardized ecosystem. As a Senior TypeScript/Vue.js Developer, you will be the technical visionary for the platforms, ensuring the technology remains high-performing and scalable. Responsibilities Define and lead front-end architecture strategy using Vue 3 with TypeScript, focusing on modularity, scalability, and performance Collaborate with the Platform Team to design, document, and enforce API contracts optimized for low-latency AdTech requirements Participate in system design to align front-end requirements with back-end architecture, supporting complex UI states and asynchronous data flows Partner with DevOps to deploy and scale front-end solutions in AWS, ensuring smooth integration within a microservices ecosystem Mentor and guide engineering teams, promoting an API-first mindset and rigorous TypeScript usage Requirements At least 7 years of hands-on experience in JavaScript and modern front-end development Strong expertise in Vue.js and TypeScript, including deep knowledge of Vue 3 Composition API Proven ability to collaborate with back-end/platform teams to design robust API contracts and manage complex data orchestration Experience deploying and scaling front-end applications in AWS environments Hands-on experience with Vite and modern testing tools (Cypress, Vitest) Solid AdTech domain knowledge, including advertising data models and workflows Upper-Intermediate English proficiency Personal Profile Strong leadership and mentoring skills Excellent communication and collaboration abilities Analytical mindset with a focus on scalability and maintainability

🏢 Summary: Senior Principal Engineer role focused on leading the architectural transformation of a scalable AdTech platform toward a platform-first, API-driven ecosystem. The position combines hands-on TypeScript/Vue.js development with architectural leadership across microservices and serverless environments. Full remote across Europe with responsibility for technical vision, cross-functional leadership, and enterprise stakeholder collaboration. 🗂️ Requirements: 6+ years experience with JavaScript, 6+ years experience with TypeScript, 6+ years experience with Vue.js, 6+ years experience with Node.js, Experience with microservices architecture, Experience with distributed systems integration, Hands-on experience with AWS Lambda or similar serverless technologies, Strong understanding of plugin-based systems and extensibility, Experience customizing and extending existing solutions, Experience in AdTech environments, Knowledge of Vite, Knowledge of Cypress, Knowledge of Vitest, Experience with AWS S3, Experience with AWS CloudFront, Ability to translate business goals into technical solutions, Fluent English 📃 Skills: JavaScript, TypeScript, Vue.js, Node.js, Microservices, AWS, Lambda, S3, CloudFront, Vite, Cypress, Vitest, Serverless, API, Architecture 🏢 Description: Are you an experienced technical leader ready to shape the future of scalable AdTech platforms? We are seeking a Principal Engineer to drive architectural transformation and lead high-impact projects for a Sweden-based industry innovator. This is a senior-level role with full remote flexibility across Europe. At Sigma Software, we partner with global leaders to deliver cutting-edge technology solutions that automate and optimize revenue-focused operations. You will work on strategic initiatives, collaborate with cross-functional teams, and influence technical direction in a fast-paced, evolving domain. Why join us? You’ll have the opportunity to work on globally recognized platforms, contribute to architectural innovation, and enjoy a supportive culture with challenging projects. Customer Our Customer is a Swedish AdTech company that transforms the way publishers and advertisers interact. They provide state-of-the-art self-serve advertising platforms that enable seamless, direct transactions between advertisers and some of the world’s largest publishers. Their mission is to make advertising more accessible, automated, and efficient through innovative technology. Together, we serve globally recognized clients, including TripAdvisor, Bloomberg, The Washington Post, Opera, Dow Jones, etc. Project The project represents a strategic transition to a Platform-First, API-driven architecture. The company is moving away from monolithic, client-specific codebases to a standardized ecosystem. As a Senior TypeScript/Vue.js Developer, you will be the technical visionary for the platforms, ensuring the technology remains high-performing and scalable. Requirements At least 6+ years of hands-on experience in JavaScript / TypeScript, Vue.js, and Node.js Experience in microservices architecture and distributed systems integration Hands-on experience with AWS Lambda or similar serverless technologies Deep understanding of plugin-based systems and extensibility points Proven ability to customize and extend existing solutions without breaking core functionality Experience in AdTech environments with evolving requirements Knowledge of Vite, Cypress, and Vitest for modern development workflows and testing Experience with AWS S3 and CloudFront for scalable storage and content delivery Strong commercial acumen and ability to translate business goals into technical infrastructure Fluent English communication skills for enterprise stakeholder management Will be a plus Experience with other serverless frameworks (e.g., Azure Functions, Google Cloud Functions) Familiarity with enterprise e-commerce platforms Knowledge of performance optimization and security best practices Prior work in media publishing technology solutions Personal Profile Proactive, solution-oriented mindset Strong problem-solving skills and ability to unblock dependencies Comfortable working in fast-paced environments with evolving requirements System-thinking approach — seeing beyond individual tasks to the bigger picture Responsibilities Act as a key technical liaison between business and engineering teams, translating commercial goals into actionable technical solutions Evaluate publisher technical environments and design scalable, maintainable architectures Prepare client-ready solution proposals, including features, integrations, and tools Lead cross-functional delivery teams, including developers, designers, DevOps, and technical PMs Provide architectural oversight throughout the development lifecycle to ensure continuity and quality Manage distributed teams across multiple time zones Mentor engineers, conduct code reviews, and guide technical growth Make architectural decisions at component and plugin levels, balancing trade-offs and communicating choices clearly

🏢 Summary: Senior Node.js Engineer role focused on building and scaling a secure, high-performance FinTech platform used by businesses across Europe. The position involves designing distributed systems, developing backend and frontend components, and working within a distributed agile team using modern cloud and microservices architecture. The offer emphasizes technical leadership, code quality, and collaboration on complex financial solutions. 🗂️ Requirements: 5+ years Back-End development experience, 3+ years TypeScript experience, 4+ years Node.js experience, Experience designing distributed systems, Experience building secure and scalable systems, Strong AWS experience, Frontend development experience, Understanding of microservices architecture, Experience designing and maintaining APIs, Experience with REST and/or GraphQL APIs, Knowledge of DevOps practices, Knowledge of testing best practices, Upper-Intermediate English level 📃 Skills: Node.js, TypeScript, React, AWS, Microservices, REST, GraphQL, JavaScript, ES6, DevOps, API, Testing 🏢 Description: Are you ready to take on a key role in developing cutting-edge financial solutions? We are looking for a Senior Node.js Engineer to join our distributed agile team and work on a highly secure, scalable FinTech platform used by businesses across Europe. We at Sigma Software value innovation, technical excellence, and collaboration. This position offers the opportunity to work with modern technologies such as Node.js, TypeScript, React, AWS, and microservices architecture. You’ll have the chance to work on impactful projects, enjoy flexible working arrangements, and grow your expertise alongside talented professionals. CUSTOMER Our Customer is one of Europe’s fastest-growing FinTech companies, providing a comprehensive payment platform that integrates financial services into its products. Their solutions include account management, virtual cards, bank transfers, and other advanced features. The company is known for its innovative approach to simplifying financial operations for businesses, ensuring security, scalability, and user-centric design. PROJECT The project focuses on building and enhancing a secure, scalable, and user-friendly financial services platform used by businesses across Europe. The team is distributed and agile, with a strong emphasis on engineering best practices and code quality. Key Technologies: Node.js, TypeScript, React, AWS, Microservices, REST, GraphQL. RESPONSIBILITIES Design, develop, and implement large-scale software solutions using Node.js and React Ensure high quality and maintainability of code across all stages of development Collaborate closely with cross-functional teams to gain full context for complex tasks Adhere to engineering best practices, company policies, and client guidelines Provide mentorship, technical guidance, and coaching to less-experienced engineers Advocate for clean code principles, design patterns, and architectural best practices Design and maintain distributed and secure systems, ensuring scalability and performance Build and integrate APIs into the platform Work with AWS services and DevOps practices to ensure reliability and efficiency REQUIREMENTS Over 5 years of experience in Back-End software development At least 3 years of experience with TypeScript Over 4 years of experience working with Node.js Strong experience in designing distributed and secure systems Strong experience working with AWS Good Front-End development skills Good understanding of microservices architectures Experience in designing, building, and maintaining APIs Experience in building and consuming REST and/or GraphQL APIs Familiarity with DevOps practices Good knowledge of testing best practices At least an Upper-Intermediate level of English WILL BE A PLUS Experience with modern JavaScript and ES6 libraries PERSONAL PROFILE Proactive problem-solver with a strong sense of ownership Effective communicator and team collaborator Adaptable to changing priorities and requirements

🏢 Summary: Senior Node.js Engineer role focused on designing and developing a secure, scalable FinTech platform for European businesses. The position involves working in a distributed agile team using modern technologies to build and enhance financial services solutions. The offer emphasizes high-quality engineering practices, microservices architecture, and cloud-based infrastructure. 🗂️ Requirements: 5+ years Back-End development experience, 4+ years Node.js experience, 3+ years TypeScript experience, Experience designing distributed systems, Experience designing secure systems, Strong AWS experience, Front-End development skills, Understanding of microservices architecture, Experience designing and maintaining APIs, Experience with REST or GraphQL APIs, Familiarity with DevOps practices, Knowledge of testing best practices, Upper-Intermediate English level 📃 Skills: Node.js, TypeScript, React, AWS, Microservices, REST, GraphQL, JavaScript, ES6, DevOps, API, Testing 🏢 Description: Are you ready to take on a key role in developing cutting-edge financial solutions? We are looking for a Senior Node.js Engineer to join our distributed agile team and work on a highly secure, scalable FinTech platform used by businesses across Europe. We at Sigma Software value innovation, technical excellence, and collaboration. This position offers the opportunity to work with modern technologies such as Node.js, TypeScript, React, AWS, and microservices architecture. You’ll have the chance to work on impactful projects, enjoy flexible working arrangements, and grow your expertise alongside talented professionals. CUSTOMER Our Customer is one of Europe’s fastest-growing FinTech companies, providing a comprehensive payment platform that integrates financial services into its products. Their solutions include account management, virtual cards, bank transfers, and other advanced features. The company is known for its innovative approach to simplifying financial operations for businesses, ensuring security, scalability, and user-centric design. PROJECT The project focuses on building and enhancing a secure, scalable, and user-friendly financial services platform used by businesses across Europe. The team is distributed and agile, with a strong emphasis on engineering best practices and code quality. Key Technologies: Node.js, TypeScript, React, AWS, Microservices, REST, GraphQL. RESPONSIBILITIES Design, develop, and implement large-scale software solutions using Node.js and React Ensure high quality and maintainability of code across all stages of development Collaborate closely with cross-functional teams to gain full context for complex tasks Adhere to engineering best practices, company policies, and client guidelines Provide mentorship, technical guidance, and coaching to less-experienced engineers Advocate for clean code principles, design patterns, and architectural best practices Design and maintain distributed and secure systems, ensuring scalability and performance Build and integrate APIs into the platform Work with AWS services and DevOps practices to ensure reliability and efficiency REQUIREMENTS Over 5 years of experience in Back-End software development At least 3 years of experience with TypeScript Over 4 years of experience working with Node.js Strong experience in designing distributed and secure systems Strong experience working with AWS Good Front-End development skills Good understanding of microservices architectures Experience in designing, building, and maintaining APIs Experience in building and consuming REST and/or GraphQL APIs Familiarity with DevOps practices Good knowledge of testing best practices At least an Upper-Intermediate level of English WILL BE A PLUS Experience with modern JavaScript and ES6 libraries PERSONAL PROFILE Proactive problem-solver with a strong sense of ownership Effective communicator and team collaborator Adaptable to changing priorities and requirements

🏢 Summary: Senior Front-End Developer role focused on building scalable, secure fintech solutions using React.js and TypeScript. The position involves designing large-scale distributed systems, developing and integrating APIs, and ensuring high-quality standards across the development lifecycle. The role also includes mentoring engineers and contributing to architectural decisions in a cloud-based environment. 🗂️ Requirements: 5+ years of front-end development experience, 3+ years of experience with TypeScript, 4+ years of experience with React.js, Experience designing distributed and secure systems, Understanding of microservices architecture, Experience designing and maintaining APIs, Experience building and consuming REST or GraphQL APIs, Experience with AWS cloud services, Knowledge of testing best practices, Upper-Intermediate English proficiency 📃 Skills: React.js, TypeScript, JavaScript, REST, GraphQL, AWS, Microservices, APIs, Docker, Kubernetes, CI/CD 🏢 Description: Ready to take your front-end expertise to the next level? At Sigma Software, we’re looking for a Senior Front-End Developer with strong React.js expertise who thrives on crafting exceptional user experiences and delivering high-quality, scalable solutions. Joining Sigma Software means becoming part of a global team that values your ideas, supports your growth, and empowers you to make an impact. We believe in combining cutting-edge technologies with a culture of collaboration and continuous improvement. Customer Our client has rapidly become one of Europe’s most swiftly expanding FinTech companies. They oversee all aspects of financial operations, from generating virtual cards to facilitating wire transfers and maintaining customer account balances. As a payment institution, our client provides a platform that integrates financial services into its product, offering features such as account management, card payments, bank transfers, and additional services. Responsibilities Design and implement large-scale software solutions and components, primarily using React.js and TypeScript Maintain high-quality standards throughout development, testing, and deployment phases Collaborate closely with cross-functional teams to understand requirements and deliver optimal solutions Mentor and guide less-experienced engineers, fostering knowledge sharing and skill development Apply clean code principles, design patterns, and best practices in all development work Ensure system security and scalability in distributed architectures Participate in code reviews and continuous improvement initiatives Requirements 5+ years of experience in front-end software development 3+ years of experience with TypeScript 4+ years of experience working with React.js Strong expertise in designing distributed and secure systems Solid understanding of microservices architecture Experience in designing, building, and maintaining APIs Proficiency in building and consuming REST and/or GraphQL APIs Experience working with AWS cloud services Knowledge of testing best practices Upper-Intermediate or higher English proficiency Would be a plus Familiarity with DevOps practices Experience with CI/CD pipelines and automation tools Knowledge of containerization (Docker, Kubernetes) Exposure to financial services or payment systems Understanding of regulatory compliance in FinTech Personal Profile Strong analytical and problem-solving skills Excellent communication and team collaboration abilities Proactive approach to learning and adopting new technologies Leadership mindset with mentoring capabilities Attention to detail and commitment to quality

🏢 Summary: Senior Front-End Developer role focused on building large-scale, secure, and scalable solutions using React.js and TypeScript within a FinTech environment. The position involves designing distributed systems, developing APIs, and ensuring high-quality standards across the development lifecycle. The role also includes mentoring team members and contributing to architectural and technical decisions. 🗂️ Requirements: 5+ years of front-end development experience, 3+ years of TypeScript experience, 4+ years of React.js experience, Experience designing distributed and secure systems, Understanding of microservices architecture, Experience designing and maintaining APIs, Experience with REST or GraphQL APIs, Experience with AWS cloud services, Knowledge of testing best practices, Upper-Intermediate English proficiency 📃 Skills: React, TypeScript, JavaScript, REST, GraphQL, AWS, Microservices, APIs, Docker, Kubernetes, CI/CD 🏢 Description: Ready to take your front-end expertise to the next level? At Sigma Software, we’re looking for a Senior Front-End Developer with strong React.js expertise who thrives on crafting exceptional user experiences and delivering high-quality, scalable solutions. Joining Sigma Software means becoming part of a global team that values your ideas, supports your growth, and empowers you to make an impact. We believe in combining cutting-edge technologies with a culture of collaboration and continuous improvement. Customer Our client has rapidly become one of Europe’s most swiftly expanding FinTech companies. They oversee all aspects of financial operations, from generating virtual cards to facilitating wire transfers and maintaining customer account balances. As a payment institution, our client provides a platform that integrates financial services into its product, offering features such as account management, card payments, bank transfers, and additional services. Responsibilities Design and implement large-scale software solutions and components, primarily using React.js and TypeScript Maintain high-quality standards throughout development, testing, and deployment phases Collaborate closely with cross-functional teams to understand requirements and deliver optimal solutions Mentor and guide less-experienced engineers, fostering knowledge sharing and skill development Apply clean code principles, design patterns, and best practices in all development work Ensure system security and scalability in distributed architectures Participate in code reviews and continuous improvement initiatives Requirements 5+ years of experience in front-end software development 3+ years of experience with TypeScript 4+ years of experience working with React.js Strong expertise in designing distributed and secure systems Solid understanding of microservices architecture Experience in designing, building, and maintaining APIs Proficiency in building and consuming REST and/or GraphQL APIs Experience working with AWS cloud services Knowledge of testing best practices Upper-Intermediate or higher English proficiency Would be a plus Familiarity with DevOps practices Experience with CI/CD pipelines and automation tools Knowledge of containerization (Docker, Kubernetes) Exposure to financial services or payment systems Understanding of regulatory compliance in FinTech Personal Profile Strong analytical and problem-solving skills Excellent communication and team collaboration abilities Proactive approach to learning and adopting new technologies Leadership mindset with mentoring capabilities Attention to detail and commitment to quality

🏢 Summary: Backend Developer role focused on modernizing and transforming legacy sales systems using Node.js and .NET technologies. The position involves building and maintaining APIs, databases, and event-driven architectures within AWS, while supporting deployment and continuous improvement processes. The role emphasizes proactive development, high-quality testable code, and collaboration on large-scale backend initiatives. 🗂️ Requirements: 5-6 years experience with Node.js, 2-3 years experience with .NET, Strong proficiency in TypeScript and JavaScript, Experience building and maintaining APIs, Experience with PostgreSQL and DynamoDB, Experience with event-driven architecture, Experience with AWS services, Ability to write modern, testable, high-quality code, Experience with CI/CD pipelines, Experience maintaining and modernizing legacy systems 📃 Skills: Node.js, TypeScript, JavaScript, .NET, AWS, Lambda, DynamoDB, PostgreSQL, RDS, ECS, Kafka, EventBridge, CDK, GitLab, CI, Docker, Localstack 🏢 Description: We're seeking an experienced & energetic Backend Developer specializing in TypeScript/JavaScript/.NET to enhance the global Sales ecosystem. This role focuses on transforming backend systems, emphasizing proactive development and team empowerment. Candidates should bring a blend of Node.js and .NET expertise to the table, along with a collaborative spirit and a commitment to writing modern, testable code. Our Client’s team, comprising about 25 individuals, is modernizing legacy systems to fulfill local market needs while improving our processes continually. If you're motivated by challenges and have a passion for creating high-value solutions, we want to hear from you! Main Responsibilities: Drive initiatives and collaborate with team members on larger projects. Fix bugs and implement smaller enhancements across the application. Participate in creating and maintaining APIs using AWS services. Develop and improve databases with a focus on PostgreSQL and DynamoDB. Contribute to an event-driven architecture utilizing Kafka and AWS EventBridge. Manage deployment processes using AWS CDK and GitLab CI. Support legacy system maintenance and modernization. Key Requirements: At least 5-6 years of experience as a Node.js Developer. 2-3 years of experience with .NET. Energetic and inspiring personality who thrives on challenges. Hands-on work ethic in collaboration with team members. Proficiency in writing modern, testable, and high-quality code. Natural inclination towards evolutive maintenance. Nice to Have: AWS experience (Serverless Lambda, DynamoDB, RDS, ECS, AWS CDK). Knowledge of Localstack. Experience with Docker. Other Details: This position allows for team activities at least twice per year in Sweden, with a focus on modernizing our legacy systems into proactive, quality-focused solutions. Join a team of about 25 members dedicated to driving transformative change in our sales ecosystem.

🏢 Summary: Fully remote Senior Node.js Backend Engineer role focused on building and scaling cloud-native microservices in a serverless AWS environment. The position involves designing high-performance REST APIs, provisioning infrastructure with Terraform, and optimizing distributed systems for scalability and resilience. You will contribute to CI/CD pipelines and ensure robust, production-grade backend services. 🗂️ Requirements: 4+ years of professional experience in Node.js server-side development, 2+ years of experience in system and data integration, transformation, and validation, Strong experience designing and deploying REST APIs, Hands-on experience with Terraform for AWS infrastructure provisioning, Practical experience with AWS services: Lambda, SQS, CloudWatch, S3, Deep understanding of distributed systems, scalability, and failure handling, Experience with CI/CD pipelines and GitHub Actions, Proficiency with shell scripting and Linux command-line tools 📃 Skills: Node.js, AWS, Lambda, SQS, CloudWatch, S3, Terraform, REST, CICD, GitHubActions, Shell, Linux, DistributedSystems, DynamoDB, DocumentDB, Streaming 🏢 Description: Ignite innovation at the forefront of cloud-native backend development — shape scalable microservices for dynamic digital ecosystems. Fully-remote opportunity! As a Senior Node.js Backend Engineer , you will be working for our client, a leading technology-driven organization dedicated to building resilient distributed systems that power tomorrow's digital experiences. You will contribute to designing and implementing high-performance microservices on AWS, enhancing system robustness, scalability, and flexibility. Join us and be part of pioneering solutions that redefine industry standards and accelerate your career growth. Your main responsibilities: Develop and maintain REST-like APIs and backend services using Node.js in a serverless AWS environment Design, implement, and optimize infrastructure-as-code configurations with Terraform for AWS services such as Lambda, SQS, CloudWatch, and S3 Integrate complex data streams, transform, validate, and analyze data within distributed systems Collaborate with cross-functional teams to ensure system robustness, scalability, and failure resilience Contribute to CI/CD pipelines utilizing GitHub Actions, and enforce best practices in version control Troubleshoot and resolve operational issues within AWS infrastructure and backend services Maintain comprehensive documentation and ensure high-quality code standards You're ideal for this role if you have: At least 4 years of professional experience in Node.js server-side development 2+ years of experience in system/data integration, transformation, and validation Deep understanding of distributed systems, including scalability, elasticity, replication, and failure handling Strong experience designing and deploying REST-like APIs Hands-on experience with Terraform for AWS infrastructure provisioning Practical knowledge of serverless AWS services: Lambda, SQS, CloudWatch, S3 Solid grasp of GitHub tool suite, CICD pipelines, and shell scripting Good command of Linux command line tools Excellent communication skills in English Problem-solving mentality with a focus on business impact It is a strong plus if you have: Experience with DynamoDB, DocumentDB, and Streaming services Language Required for the role: Fluent English Eligibility for the role: Only candidates with an existing legal right to work in the European Union will be considered for this role. We offer you At ITDS , you will work on innovative and impactful technology projects for international companies across multiple industries in Europe and beyond. We create an environment for ambitious, driven professionals who want to grow, deliver value, and build their careers in modern IT and digital transformation. Our offer includes: Stable and long-term cooperation with attractive conditions Opportunities to develop your technical expertise across various industries and technologies The chance to work on high-impact, strategic IT and digital transformation projects A clear career path and the opportunity to grow quickly by contributing to diverse client initiatives over time International environment , knowledge sharing, social events, and training opportunities Access to an attractive medical package Access to the Multisport program Access to learning platforms such as Pluralsight Flexible working hours and remote work options #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. # 8942