# Arnab Biswas > Software Engineer – Frontend & Platform @ Barclays UK | React, TypeScript, Node.js, SQL | Building Scalable, High-Performance Enterprise Systems Location: London, England, United Kingdom Profile: https://flows.cv/arnabbiswas ⦿ Fullstack Developer skilled in React, Node.js, TypeScript, JavaScript, SQL, and UI/UX design. ⦿ Currently developing and enhancing a secure financial services platform at Barclays UK, involving: - Designing and building responsive UI/UX pages. - Integrating frontend with backend APIs using Node.js. - Ensuring real-time data accuracy by connecting to SQL databases. ⦿ Contributed to an award-winning fintech application built from scratch to support vulnerable customers, recognized by Barclays for innovation. ⦿ Strong foundation in Data Structures & Algorithms, having solved 3000+ coding problems across various platforms. ⦿ Experienced in Agile and Scrum methodologies for effective and timely project delivery. ⦿ Familiar with Engineering Design and Low-Level System Design principles. ⦿ Collaborative team player who continuously seeks to learn new technologies and improve coding skills. 𝗦𝗞𝗜𝗟𝗟𝗦: ⦿ Programming Languages: Java, JavaScript (ES6+), TypeScript, C++, Python ⦿ Frontend Technologies: React.js, Redux, Next.js, HTML5, CSS3, UI/UX Design ⦿ Backend Technologies: Node.js, Express.js, REST APIs ⦿ Databases: SQL (MySQL), MongoDB, Firebase ⦿ Testing & Automation: Cypress, Test Automation ⦿ Tools & Platforms: Git, GitHub, Visual Studio Code, Agile & Scrum, Hosting (Netlify, Hostinger, GitHub Pages) ⦿ Concepts & Methodologies: Data Structures & Algorithms, Object-Oriented Programming (OOP), Engineering Design, Low-Level System Design, Web Performance Optimization ## Work Experience ### Software Engineer - Full Stack @ Barclays UK Jan 2025 – Present | Northampton, England, United Kingdom • Engineered a scalable, production-grade UI architecture, delivering 25+ high-performance, WCAG-compliant components using React, TypeScript, and modern frontend patterns. Standardised design conventions across multiple internal applications and boosted UI consistency and usability by 30%. • Architected and integrated complex frontend modules with Node.js APIs across 10+ microservices, optimising network flows, reducing API payload overhead by 18%, and improving page-level load times through intelligent caching and batching strategies. • Implemented real-time data synchronisation pipelines with SQL-backed services, enabling millisecond-level updates and improving operational data accuracy for internal teams by 40%. • Led full end-to-end development of several major application experiences — from wireframing and UX prototyping, to React implementation, API integration, QA automation, and deployment. Consistently reduced feature delivery timelines by 25% across sprints. • Built an end-to-end intelligent chatbot system used by BI Architects and BI Engineers for automated query resolution, knowledge access, and workflow initiation; significantly reduced manual triage time. • Modernised the testing ecosystem by migrating legacy scripts to Cypress, improving test reliability by 50% and reducing regression execution time from ~20 minutes → 8 minutes. • Partnered with backend and data engineering teams to validate API contracts, optimise SQL query structures, standardise response schemas, and ensure seamless communication between React frontends and data-rich services. • Oversaw full-stack initiatives spanning React-based UIs, Node.js services, SQL data layers, and internal micro-frontends. Contributed to enabling BI engineers with mobile-capable interfaces for on-the-go access to key insights. ### Software Engineer - Frontend ( React / UI Engineering) @ Barclays UK Jan 2024 – Jan 2025 | Northampton, England, United Kingdom • Delivered enterprise-grade UI/UX systems, producing responsive, accessible, and performance-optimised interfaces for high-visibility internal applications using React, TypeScript, JavaScript, Redux, and modular component architectures. • Architected and delivered a command-centre style, real-time operational analytics platform, visualising enterprise metrics such as live users, ATM activity, transaction health, and system uptime for 200+ internal stakeholders. • Created structured design frameworks and UI component libraries that improved scalability, accessibility, and developer productivity across teams. • Designed and implemented multiple new application pages end-to-end, from user experience flows, low-fidelity wireframes, high-fidelity UI, state management, and API integration to automated test coverage. • Led continuous improvement of the frontend codebase, addressing SonarQube vulnerabilities, eliminating dead codepaths, improving bundle size, and increasing Lighthouse scores. • Established testing best practices, including Cypress-driven regression suites, integration test coverage, and CI optimisations. • Improved real-time operational dashboards used across the organisation, enhancing visibility into mission-critical metrics such as live users, transaction throughput, ATM availability, service incidents, and pipeline delays. • Co-built an award-winning digital solution under BUK Technology – Early Careers, recognised as “Best Innovative Project”, designed to support vulnerable customers with accessible, simplified digital experiences. • Delivered reusable interface frameworks and accessibility-first design patterns, increasing component reuse by 35%, improving developer onboarding, and reducing frontend code duplication. • Active contributor to Agile ceremonies — driving architectural discussions, UI governance, code reviews, sprint estimations, and documentation efforts. ### Software Engineer - (MERN Development) @ TwoWaits Jan 2022 – Jan 2022 As a MERN Developer, I became proficient in front-end technologies such as HTML, CSS, and JavaScript. I gained experience with popular front-end frameworks like React. I learnt back-end technologies and frameworks like Node.js. I gained hands-on experience in designing and developing server-side logic, working with databases, and building RESTful APIs. ### Machine Learning Engineer @ 1Stop.ai Jan 2021 – Jan 2021 Skills: Pandas (Software) · Natural Language Processing (NLP) · Python (Programming Language) ## Education ### Bachelor of Technology - BTech in Electronics and Communication Engineering Institute of Engineering & Management, Kolkata ### ISC - Higher Secondary Education in Mathematics and Computer Science St. James' School (Kolkata) ### ICSE in Computer Science St. James' School (Kolkata) ## Contact & Social - LinkedIn: https://linkedin.com/in/arnabbiswasab - Website: https://topmate.io/arnab_biswas --- Source: https://flows.cv/arnabbiswas JSON Resume: https://flows.cv/arnabbiswas/resume.json Last updated: 2026-04-05