Senior Frontend Engineer with 9+ years of experience building scalable web applications. Strong focus on React and TypeScript, with experience in Angular-based enterprise systems. Skilled in designing complex user journeys, performance optimization, and mentoring developers.
Hi, I’m
Vishnu Sasikumar
Amsterdam,Netherlands
Summary
Overview
12
years of professional experience
Work History
BackbaseAmsterdam
Senior Front-End Developer
05.2024 - Current
Job overview
- Worked within a large-scale Nx monorepo architecture to build enterprise-grade banking applications.
- Designed and implemented a scalable file upload system, handling end-to-end workflows including validation, backend integration, and user experience.
- Developed and released core payment journeys such as initiating payment, managing payment, and handling complex business logic and secure transaction flows.
- Built and maintained modular, reusable front-end components using Angular and TypeScript, ensuring scalability and consistency across applications.
- Applied reactive programming using RxJS to manage complex asynchronous workflows and state management.
- Designed and contributed to a micro-frontend architecture, where payment journeys were developed and deployed as independently versioned modules, integrated into the main banking application at build time.
- Managed versioning and release of payment modules, enabling independent deployment and faster iteration across teams.
- Contributed to CI/CD pipelines using GitHub Actions, automating build, versioning, and deployment processes for modular applications.
- Collaborated closely with backend teams to integrate APIs for secure and reliable payment processing.
- Reviewed and optimised AI-assisted code (Cursor), ensuring high standards of performance, readability, and maintainability.
- Participated in code reviews, maintaining code quality and enforcing best practices across the team.
- Mentored junior developers and supported onboarding, improving team productivity and knowledge sharing.
- Led internal workshops on modern web development practices, promoting clean architecture and scalable front-end design.
QardioAmsterdam
Lead Front End Developer
04.2020 - 03.2024
Job overview
- Led development of a health monitoring platform enabling doctors to track patient vitals and communicate with patients
- Designed and developed key features for patient management, doctor communication, and clinic administration workflows
- Migrated legacy AngularJS application to React with TypeScript, adopting modern hooks-based architecture
- Implemented state management using Redux for scalable and predictable data flow
- Built interactive data visualizations using D3 (Canvas) for real-time health metrics
- Developed backend service layer using Node.js and JSReports for generating patient reports
- Implemented comprehensive testing using Jest, React Testing Library, and Cypress
- Worked with CI/CD pipelines using Jenkins to support automated builds and deployments
- Collaborated with product and marketing teams to define and deliver new features
- Mentored junior developers and contributed to improving team development practices
KLMAmsterdam
Senior Front-End Developer
11.2019 - 04.2020
Job overview
- Developed an employee learning portal with complex frontend workflows and interactive features
- Owned end-to-end development of the application across frontend (React and backend (Node.js)
- Built scalable and maintainable UI components using React and TypeScript
- Integrated backend services with frontend using a single deployment architecture (Webpack-based setup)
- Designed and developed RESTful APIs using Node.js
- Implemented unit and integration testing using Jest and Cypress
- Deployed and managed applications in Pivotal Cloud Foundry (PCF)
- Collaborated with stakeholders to gather requirements and translate them into technical solutions
- Mentored junior developers and contributed to improving team processes and delivery standards
Education
Muthayammal College Of EngineeringIndia
Master of Science (MSC) from Software Engineering
01.2011
University Overview
Languages known: English, Dutch (Beginner)
Skills
- Senior Frontend Engineer with 9 years of experience building scalable web applications
- Strong experience working in cross-functional, globally distributed teams
- Domain expertise across banking/payments (Backbase), airlines (KLM), analytics (Nielsen), and healthcare (Qardio)
- Strong focus on React and TypeScript, with experience in Angular-based enterprise systems
- Hands-on experience designing and building complex user journeys and enterprise applications
- Experience with micro-frontend architecture, enabling modular development and independent deployment of features
- Solid understanding of CI/CD pipelines, with hands-on experience using GitHub Actions for automated build and deployment workflows
- Hands-on experience designing and building complex user journeys and enterprise-grade applications
- Strong understanding of state management (Redux, NgRx) and reactive programming (RxJS)
- Experience with modern testing frameworks including Jest, React Testing Library, Cypress, Jasmine, and Karma
- Leveraged AI-assisted development tools to accelerate delivery while ensuring high code quality and maintainability
Skills
Skills
React, Angular, TypeScript, JavaScriptRedux, NgRx, RxJSJest, Cypress, React Testing LibraryFirebase, Node.js, Nx, Jenkins
Projects
Projects
Creator Studio — Personal Product
- Built to streamline content planning and collaboration workflows, solving challenges in managing YouTube content pipelines and brand partnerships
- Built a React + Firebase application to manage YouTube content workflows and collaborations
- Designed and implemented features tracking brand collaborations, and workflow management
- Developed a dashboard for tracking monthly content plans, performance, and historical data
- Architected scalable frontend structure using reusable components and modular design
- Focused on clean UI/UX and performance optimization for smooth user experience
- Actively used in real-world content planning workflows
Timeline
Senior Front-End Developer
Backbase
05.2024 - Current
Lead Front End Developer
Qardio
04.2020 - 03.2024
Senior Front-End Developer
KLM
11.2019 - 04.2020
Muthayammal College Of Engineering
Master of Science (MSC) from Software Engineering