Principal Full-Stack Engineer (Frontend focus)

🏢 Summary: Fullstack Engineer role focused on building and scaling a data and analytics platform for investment decision-making, leveraging machine learning and strategic data. The position involves end-to-end development of production-grade applications, API integration, and ensuring platform scalability and performance in a hybrid work model. 🗂️ Requirements: 4+ years of experience with TypeScript and Node.js in production environments, Strong knowledge of HTML and CSS, Experience with SQL and PostgreSQL databases, Ability to design and integrate REST and GraphQL APIs, Experience with automated testing, pair programming, and peer review practices 📃 Skills: TypeScript, Node.js, HTML, CSS, SQL, PostgreSQL, GraphQL, REST, GCP, DevOps 🏢 Description: About the Project: Our client is a Swedish fintech company expanding in Poland. This project focuses on developing a data and analytics platform designed to revolutionize investment decision-making by leveraging machine learning and strategic data. As a Fullstack Engineer, you will design, develop, and maintain scalable solutions, collaborating with cross-functional teams to ensure the delivery of high-quality features. Work Mode : Hybrid – 2/3 days in the Warsaw office Job Responsibilities: Collaborate with cross-functional teams to ensure the delivery of high-quality features. Contribute to all stages of the development lifecycle. Design, develop, and maintain scalable solutions that support investment operations. Leverage machine learning and strategic data to deliver exceptional insights. Work closely with passionate professionals who believe in collaboration, innovation, and making a meaningful impact. Ensure the platform's scalability and performance through continuous improvement and optimization. Expectations: Must have: 4+ years of experience developing production-grade applications using TypeScript and Node.js Strong understanding of HTML, CSS, and design principles Knowledge of database management with SQL and PostgreSQL Experience with software craftsmanship practices, including automated testing, pair programming, and peer review Ability to write and integrate APIs in various formats such as GraphQL and Rest Nice to have: Experience with Google Cloud Platform (GCP) and DevOps practices. Familiarity with cloud-native development and scalable system architectures. We offer: Ongoing support from a dedicated agent who is caring about your project continuity, contact with clients, necessary formalities, work comfort, and development. Career Development Program – advice on career planning based on the latest trends and market needs in IT, including consultations with career agents and mentors. Access to 7N Learning & Development – a development and educational platform offering webinars, a library of articles and industry reports, and frequent invitations to both one-time and recurring events focused on technical, business, and lifestyle topics. Spectacular events, both for you (e.g., annual Kick-Off trip , Christmas parties, or Summer Olympics sports events) and for your loved ones (e.g. family picnics), Professional growth Professional growth beyond your current project. You can actively engage in knowledge sharing through the 7N Services offering, designed for 7N clients. Connections and access to the expertise of top IT professionals in the market – the average professional tenure of our consultants in Poland is over 10 years, A complete benefits package, including funding for medical care, life insurance, sports cards for you and your loved ones, as well as discounts in stores in Poland and abroad.

🏢 Summary: Senior Fullstack JavaScript Developer role focused on building cloud-integrated, data-driven solutions in an agile global team. The position involves designing and developing scalable software, solving identity and account management challenges, and integrating cloud and machine learning capabilities. Remote-friendly role (Warsaw-based) contributing to sustainable, business-critical products. 🗂️ Requirements: 5+ years of software development experience, Strong JavaScript knowledge including runtimes and APIs, Backend development experience with Node.js, Proficiency in TypeScript, Frontend development experience with React, Experience with AWS services (DynamoDB, Lambda, Step Functions), Experience designing technical architecture, Fluent English, Legal right to work in the EU 📃 Skills: JavaScript, TypeScript, Node.js, React, AWS, DynamoDB, Lambda, StepFunctions, REST, APIs, Git, Agile 🏢 Description: Unleash innovation at the intersection of cloud, data, and full-stack development — shape sustainable solutions for a better tomorrow! Warszawa-based opportunity with a remote work model (once every two weeks in the office). As a Senior Fullstack JavaScript Developer – Cloud & Data Solutions , you will be working for our client, a global leader in healthcare and agriculture dedicated to solving major global challenges in the spirit of environmental care. Join a forward-thinking team developing cutting-edge solutions in crop science, contributing to sustainable farming, resilient plants, and thriving communities. Your expertise will drive the development of cloud-integrated software, data analysis tools, and innovative machine learning integrations that foster a sustainable future. Your main responsibilities: Develop and support business-critical software solutions within an agile, global, product-oriented team Solve organization-wide challenges related to identity and account management Design and document technical architecture and software solutions across multiple teams Ensure the technical feasibility, quality, and high performance of all delivered solutions Evaluate and recommend new technologies to enhance efficiency and scalability Build and maintain relationships with key stakeholders and partner organizations Mentor junior engineers, fostering technical growth and innovation Continuously develop your technical skills and career in a fast-paced environment You're ideal for this role if you have: 5+ years of experience in software development or engineering Strong problem-solving skills, proactive attitude, and collaborative mindset Deep knowledge of JavaScript, including runtimes, APIs, and ecosystem Extensive experience with Backend development using Node.js Proficiency in TypeScript, with a track record of writing clean, maintainable code Strong front-end skills with React, build tools, and performance optimization Cloud expertise – working with AWS (DynamoDB, Lambda, Step Functions) Product-oriented mindset – understanding business domains and proposing pragmatic solutions Excellent command of English and experience working in agile, product-driven organizations Ability to collaborate effectively with a global team across time zones Willingness to learn, innovate, and grow in a dynamic environment It is a strong plus if you have: Knowledge of Medusa.js Experience with SAP and Salesforce integration Language required for the role: Fluent in English with excellent communication skills Eligibility for the role: 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 in English or Polish, along with a statement confirming your consent to the processing and storage of your personal data.

🏢 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: Remote Full-Stack Software Engineer role focused on designing, building, and maintaining scalable web applications using modern backend and frontend technologies. The position involves end-to-end feature ownership, customer collaboration, and development of secure, high-performance systems. The engineer will work with Python, FastAPI, React, and cloud-native tools in a distributed team. 🗂️ Requirements: Approximately 5 years of professional software development experience, Strong backend development experience with Python and FastAPI, Experience with NGINX, Strong frontend development skills with React and TypeScript, Experience with Vite, Experience with MSSQL, Experience with SQLAlchemy, Hands-on experience with Docker, Hands-on experience with Kubernetes, Experience designing and consuming REST APIs, Experience with relational databases, Ability to design secure, scalable systems, Fluent English communication skills, EU citizenship, Residence in Poland 📃 Skills: Python, FastAPI, NGINX, React, TypeScript, Vite, MSSQL, SQLAlchemy, Docker, Kubernetes, REST, SQL, CI/CD, Cloud 🏢 Description: In Cyclad we work with top international IT companies in order to boost their potential in delivering outstanding, cutting-edge technologies that shape the world of the future. We are seeking a highly experienced Full-Stack Software Engineer to join a remote development team. The role focuses on designing, building, and maintaining scalable web applications using modern backend and frontend technologies. The ideal candidate is autonomous, proactive, and comfortable working directly with customers to translate business needs into robust technical solutions. Project information: Type of project: IT Services Office location: Poland Work mode: Remote Budget: 140-160 PLN net /h - b2b Only candidates with citizenship in the European Union and residence in Poland Start date: ASAP (depending on candidate availability) Project scope: Design, develop, and maintain backend services and REST APIs using Python and FastAPI Build modern, responsive frontend applications using React, TypeScript, and Vite Own features end-to-end, from backend logic to frontend user interfaces Collaborate directly with customers and stakeholders to gather requirements and provide technical guidance Design and optimize database schemas and queries using MSSQL and SQLAlchemy Deploy, operate, and maintain applications using Docker and Kubernetes Ensure best practices in security, performance, scalability, and maintainability Participate in architecture discussions and contribute to technical decision-making Troubleshoot production issues and provide reliable operational support Work closely with product, design, and engineering teams to deliver high-quality solutions on time Requirements: Approximately 5 years of professional software development experience Strong autonomy and ability to manage tasks with minimal supervision Proven experience in customer-facing or stakeholder-facing roles Solid backend development experience with Python, FastAPI, and NGINX Strong frontend development skills with React, TypeScript, and Vite Experience working with relational databases, particularly MSSQL, and ORM tools like SQL Alchemy Hands-on experience with containerization and orchestration tools such as Docker and Kubernetes Understanding of secure, scalable, and maintainable system design Experience in cloud environments (optional) Knowledge of CI/CD pipelines and DevOps best practices (optional) Experience working in agile or product-driven teams (optional) Strong verbal and written communication skills in English Self-driven, accountable, and results-oriented Comfortable working directly with customers and taking ownership of delivered solutions Team-oriented mindset with a proactive approach to problem-solving We offer: Remote working model Full-time job agreement based on b2b contract Private medical care with dental care (covering 70% of costs) + rehabilitation package. Family package option possible Multisport card (also for an accompanying person) Life insurance

🏢 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: Senior Fullstack Software Engineer & Tech Lead role focused on designing and delivering scalable, cloud-native applications on AWS using modern full-stack technologies. The position combines hands-on development with technical leadership, architecture design, and infrastructure automation. The engineer will drive end-to-end solutions, from UI and APIs to CI/CD and Infrastructure-as-Code. 🗂️ Requirements: 8+ years of software engineering experience, Strong experience in full-stack development, Expertise in TypeScript, Experience with React, Hands-on experience with AWS, Experience with serverless services (Lambda, Batch), Knowledge of Infrastructure-as-Code (Terraform or CloudFormation), Experience with RESTful API development, Experience with relational databases, Experience with NoSQL databases, Experience with CI/CD pipelines, Ability to lead technical design and mentor engineers 📃 Skills: TypeScript, React, AWS, Lambda, Batch, Terraform, CloudFormation, REST, SQL, SQLServer, DB2, Sybase, MongoDB, Elasticsearch, CI/CD 🏢 Description: Senior React Developer with AWS Join a global leader in financial technology as a Senior React Developer with AWS, shaping the future of innovative, cloud-native web applications. In this high-impact role, you'll spearhead the design and development of cutting-edge solutions at a major international institution, collaborating with cross-functional teams across Warsaw, London, New York, and India. Be part of a forward-thinking environment driving a transformative cloud migration strategy, leveraging AI and modern development practices to deliver scalable, high-performance platforms. What You'll Do: Architect and engineer modern web applications using React, TypeScript, and AWS Lead technical decision-making and provide architectural guidance to the development team Develop and maintain serverless solutions with AWS Lambda, Batch, and CloudWatch Write Infrastructure-as-Code with Terraform to streamline deployment and infrastructure management Collaborate closely with designers, product managers, and stakeholders to translate requirements into robust solutions Support migration of legacy systems to cloud-native, React-based architectures Optimize CI/CD pipelines for automated, efficient deployment Work with cloud storage solutions such as S3, MongoDB, and ElasticSearch Required Skills: 8+ years of practical software engineering experience Strong expertise in React and TypeScript Hands-on experience with AWS services, especially Lambda, Batch, and CloudWatch Experience with Terraform or similar Infrastructure-as-Code tools Solid understanding of relational and non-relational databases (MongoDB, ElasticSearch, S3) Knowledge of RESTful API design and development Excellent communication skills, capable of engaging with non-technical stakeholders Bachelor’s degree in Computer Science, Engineering, Mathematics, or related field Nice to Have Skills: Experience with CI/CD pipelines Familiarity with serverless architecture best practices Knowledge of AI development tooling in cloud environments Preferred Education and Experience: Bachelor’s or higher degree in a technical discipline 8+ years of professional experience in software engineering, with a focus on full-stack and cloud-native solutions Other Requirements: Ability to work in an on-site environment in the centre of Warsaw Willingness to contribute to a dynamic, global team driven by innovation and excellence Bring your expertise to a role that truly makes an impact - apply now and help shape the future of financial technology!

🏢 Summary: Full-Stack Developer role on a long-term, enterprise-scale banking project, delivering web solutions using .NET and React in a regulated environment. The position involves end-to-end development, API integration, and database optimization within a global technology team. Work is fully remote from Poland with collaboration on complex financial systems. 🗂️ Requirements: 3+ years of full-stack development experience, Proficiency in C# and ASP.NET Core, Experience with .NET Web API, Strong knowledge of React including state management and component architecture, Experience with HTML5, CSS3, JavaScript or TypeScript, Experience designing and integrating RESTful APIs, Strong SQL Server skills including queries and stored procedures, Experience with Entity Framework, Knowledge of design patterns and database normalization, Experience with Azure DevOps for source control and CI/CD, Understanding of application security, performance, and scalability best practices, Bachelor's degree in Computer Science or related field 📃 Skills: C#, .NET, ASP.NETCore, WebAPI, React, HTML5, CSS3, JavaScript, TypeScript, REST, SQL, SQLServer, EntityFramework, AzureDevOps 🏢 Description: We are looking for an experienced Full-Stack Developer to join a long-term project for one of the world's leading professional services organizations. You will work within a global technology team delivering solutions for a UK-based banking client in a regulated, enterprise-scale environment. Location: 100% Remote (Poland) with occasional visits to Warsaw office Client: Global professional services firm, banking & financial services sector, UK Requirements 3+ years of experience in full-stack development, with proficiency in most of the following: C#, ASP.NET Core, .NET Web API React — state management, component architecture HTML5, CSS3, JavaScript / TypeScript RESTful API design and integration SQL Server — queries, stored procedures, functions, views Entity Framework Design patterns and database normalization Azure DevOps for source control and CI/CD Application security, performance, and scalability best practices Bachelor's degree in Computer Science or related field Nice to Have Azure Cloud Services and cloud-native architecture SFTP and encryption/secure file transfer protocols Experience with vendor software integration and custom interfaces Responsibilities Design, develop, and maintain web applications using .NET (C#, ASP.NET Core) and React Build responsive user interfaces with HTML, CSS, JavaScript, and React Develop and consume RESTful APIs to connect client-side and server-side components Implement and optimize data storage using SQL Server (stored procedures, functions, views) Perform coding, debugging, testing, and troubleshooting throughout the development lifecycle Maintain and enhance existing systems, fixing complex bugs and escalating risks where needed Capture detailed requirements from stakeholders and translate them into technical specifications Ensure adherence to coding standards, design patterns, and security best practices Collaborate with vendor teams and third-party integrations Monitor emerging technologies and contribute ideas for continuous improvement We Offer 100% remote work from Poland Occasional team meetups in Warsaw Long-term project with a prestigious international client Exposure to enterprise-scale banking solutions B2B Contract Private medical care ( Luxmed ) MultiSport sports card

🏢 Summary: Senior Fullstack Engineer role focused on building and enhancing a .NET and React-based analytics platform within a financial institution, driving DevOps automation and data-driven transformation. The position involves designing scalable backend services, leading UI improvements, and optimizing CI/CD processes in a hybrid work model. You will contribute to architecture, deployment lifecycle, and high-performance web application development. 🗂️ Requirements: Minimum 7 years of experience in .NET application development, Strong proficiency in C# and Web API, Hands-on experience with React, Experience with CI/CD processes, Experience with DevOps activities, Strong SQL Server and T-SQL expertise, Knowledge of SDLC, Fluent English, Legal right to work in the EU 📃 Skills: .NET, C#, WebAPI, React, SQL, T-SQL, SQLServer, CI/CD, DevOps, SDLC, Docker, Kubernetes 🏢 Description: Unleash innovation at scale — shape the future of analytics and DevOps excellence! Krakow-based opportunity with a hybrid work model (2 days per week in the office). As a Senior Fullstack Engineer – .NET and React Analytics Platform , you will be working for our client, a leading financial institution committed to transforming DevOps practices worldwide through cutting-edge data and analytics products. You’ll contribute to developing critical insights that influence strategic decisions and drive technological evolution in a fast-paced environment. Join a team dedicated to pushing the boundaries of data-driven transformation and career growth! Your main responsibilities: Design and implement solutions following industry best practices and proven design patterns. Analyze requirements thoroughly to recommend improvements and ensure optimal architecture. Lead UI enhancements to boost user experience and application stability. Be actively involved in DevOps automation and enhancing the CI/CD lifecycle. Manage changes through the entire service management lifecycle, ensuring robust deployment processes. Participate in software architecture design and develop application prototypes for concept validation. Provide outstanding customer support by addressing issues promptly and effectively. Collaborate cross-functionally to deliver high-quality technical solutions. You're ideal for this role if you have: At least 7 years of professional experience in application development within the .NET ecosystem, including front-end skills (preferably React) and DevOps activities. Strong proficiency in C# and Web API development, with a focus on scalable, secure backend services. Hands-on experience with React for building dynamic, high-performance web applications. Solid SQL Server expertise, including advanced T-SQL scripting, query optimization, and performance tuning. Proven experience with continuous integration, continuous delivery processes. Familiarity with the Software Development Life Cycle (SDLC): requirements gathering, design, testing, deployment, and maintenance. Exceptional problem-solving skills, keen attention to detail, and ability to troubleshoot in high-pressure environments. It is a strong plus if you have: (optional) Certifications in cloud platforms or DevOps tools. Experience with containerization and orchestration (Docker, Kubernetes). Language Required for the role: Fluent English (both spoken and written). Eligibility to work in Europe: Only candidates with an existing legal right to work in the European Union will be considered for this role. We offer you: ITDS Business Consultants is involved in various, innovative, and professional IT projects for international companies in the financial industry in Europe. We offer an environment for professional, ambitious, and driven people. The offer includes: Stable and long-term cooperation with very good conditions Enhance your skills and develop your expertise in the financial industry Work on the most strategic projects available in the market Define your career roadmap and develop yourself in the best and fastest possible way by delivering strategic projects for different clients of ITDS over several years Participation in Social Events, training, and work in an international environment Access to an attractive Medical Package Access to Multisport Program #GETREADY Internal job ID #8667 You can report violations in accordance with ITDS’s Whistleblower Procedure available here .

🏢 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: 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