SHASHIDHAR LOKASANI
London
Summary
Dynamic Lead Full Stack Developer and React/React Native engineer with over 14 years of experience in crafting enterprise web and mobile applications across diverse sectors, including banking, retail, and insurance. Expertise includes a wide range of technologies such as React, Node.js, and modern architectural patterns like Microfrontends and Event-Driven Architecture, ensuring the delivery of scalable and maintainable solutions. Proven track record in cloud-native development utilizing AWS services and Infrastructure as Code (IaC), highlighting a strong focus on performance optimization and CI/CD pipeline enhancement. Currently advancing skills in AI-driven development, particularly in LLM integration for intelligent automation, while actively contributing to pre-sales efforts through RFPs and proofs of concept.
Overview
15
15
years of professional experience
Work History
Lead React and React Native Developer
Barclays, CAPGEMINI UK
10.2024 - Current
- Migrated native mobile apps to React Native, building customer journeys end-to-end with optimized performance and robust state management using Redux Toolkit.
- Developed secure payment flows and integrated real-time APIs for Payments, Mortgages, Rate Switches, and Corporate Cards, ensuring cross-platform consistency.
- Collaborated with cross-functional teams to define project scope and technical requirements.
- Evaluated emerging technologies to enhance system performance and reliability.
- Managed end-to-end software development life-cycle, from initial requirements gathering to post-implementation support and maintenance.
- Provided technical leadership and mentoring for junior team members, fostering a supportive learning environment that promoted skill development and career growth.
- Spearheaded the migration of legacy systems to modernized architecture, reducing operational expenses while increasing overall functionality.
- Contributed to architectural decisions while staying hands-on — implemented scalable patterns aligned with business needs without compromising delivery speed.
- Actively wrote production-grade code, conducted peer code reviews, and automated CI/CD pipelines, reducing release time by 20%.
Senior React Developer
Beazley Insurance Via Capgemini UK
07.2023 - 09.2024
- Developed and delivered Underwriting Workbench, a complex React-based application with event-driven architecture and SignalR real-time updates.
- Wrote production-grade React code, implemented Redux state management, and optimized rendering for performance.
- Achieved 95% unit test coverage using React Testing Library and Jest, ensuring high-quality releases.
- Acted as a technical mentor, guiding developers on React best practices and improving team efficiency.
- Developed and maintained responsive user interfaces using React, enhancing overall application performance.
- Collaborated with cross-functional teams to define and implement innovative features, improving user experience.
- Led code reviews, ensuring adherence to best practices and promoting high-quality deliverables among team members.
- Streamlined development processes by integrating modern tools and frameworks, increasing team efficiency and productivity.
- Reduced application load times by optimizing React components and utilizing code-splitting techniques.
Senior React Developer - Video Banking Application
Barclays UK Via Capgemini UK
06.2022 - 07.2023
- Built real-time video banking features using React, React Native, Redux Toolkit, and AWS Chime, enabling secure customer interactions.
- Developed responsive UI components, optimized video streaming performance, and integrated WebRTC for low-latency calls.
- Enhanced test automation and implemented CI/CD pipelines, reducing regression defects by 15%.
- Developed dynamic web applications using React, enhancing user experience and interface performance.
- Conducted code reviews and provided mentorship to junior developers, fostering a culture of continuous learning.
Senior React Developer
HSBC UK Via Capgemini UK
01.2022 - 05.2022
- Worked as part of rebranding component library for enterprise-wide use, ensuring UI consistency across HSBC applications.
- Built Storybook-based reusable components, reducing UI development time by 25% and improving design compliance.
- Spearheaded the migration of legacy systems to React-based applications, driving modernization initiatives across projects.
- Enhanced user experience by implementing responsive web designs and optimizing application performance.
- Mentored junior developers, providing guidance on React concepts and best practices for efficient project completion.
Full Stack Developer
Boots UK Via COGNIZANT UK
07.2019 - 01.2022
- Developed ReactJS frontends and Node.js microservices for high-traffic retail applications.
- Built an AI-powered chatbot for online consultations, improving customer engagement by 40%.
- Maintained SonarQube coverage >80%, enforced code quality standards, and optimized API performance.
- Conducted code reviews and technical mentoring, improving team efficiency by 25%.
- Collaborated with cross-functional teams to define technical requirements and deliver optimal solutions.
- Mentored junior developers on coding best practices, improving overall team performance and code quality.
- Worked with back-end developers to design APIs.
- Reduced page load times by optimizing front-end assets such as JavaScript files, stylesheets, and images.
- Troubleshot and resolved complex technical issues, maintaining optimal system performance and uptime.
Lead Front-End Developer
Barclays UK
09.2015 - 06.2019
- Delivered ReactJS-based enterprise banking applications, ensuring scalability and performance.
- Implemented microservices architecture and integrated secure APIs for critical banking workflows.
- Actively coded, reviewed pull requests, and optimized front-end performance, reducing load times by 20%.
Senior UI Developer
COGNIZANT INDIA
06.2012 - 09.2015
- Built responsive, scalable UI applications using ReactJS and JavaScript for BFS and Retail clients.
- Led a team of developers, conducted code reviews, and ensured timely sprint deliveries.
- Implemented performance optimizations, reducing page load times by 15%.
Front-End Developer
HCL TECHNOLOGIES
09.2010 - 05.2012
- Developed UI components for enterprise applications using JavaScript and jQuery.
- Supported deployment and production troubleshooting, ensuring minimal downtime.
- Collaborated with QA teams to automate regression testing, improving release quality.
Education
Bachelor of Science - Computer Science
Jawaharlal Nehru Technological University
Hyderabad09-2006
Skills
- Frontend & Mobile: React, React Native, Redux Toolkit, TypeScript, Nextjs, Tailwind CSS, Material UI, Storybook
- Backend & APIs: Nodejs, Express, REST, GraphQL, Microservices, Event-Driven Architecture
- Cloud & DevOps: AWS (S3, EC2, Lambda), Docker, GitHub Actions, Bitbucket Pipelines
- Testing: Jest, React Testing Library, Cypress, Playwright, SonarQube
- Architecture: Microservices, Microfrontends, Monorepos, HLD/LLD, Performance Optimization
- Collaboration: Agile/Scrum, Git, Code Reviews, Mentoring
- Testing and debugging
- Web application development
- Technology integration
- Application security
- Automated testing
- Technical support
- User experience design
- Software development
- Cloud computing
- Software architecture design
- Performance optimization
- Technical consulting
- Application development
- Product development
- Mobile application development
- Microservice design
- Web security
Languages
English
Native or Bilingual
HIGHLIGHTS & IMPACT
- -20% release time: Mobile CI/CD automation across pipelines (GitHub Actions/Bitbucket Pipelines).
- 95% unit coverage: Instituted robust testing patterns using RTL/Jest for complex React applications.
- -15% regressions: Strengthened automation and quality gates for video banking platform.
- +40% engagement: Launched AI-powered chatbot; increased customer interactions measurably.
- -20% page load: Performance improvements via code-splitting and caching strategies.
Keywords
React, React Native, Redux Toolkit, React Context API, TypeScript, Next.js, Node.js, Express.js, REST APIs, GraphQL, MongoDB, SQL, AWS (S3, EC2, Lambda, IACs), Docker, CI/CD, GitHub Actions, Bitbucket Pipelines, Storybook, Jest, React Testing Library, Cypress, Playwright, Microfrontends, Monorepo, Event-Driven Architecture, WebRTC, SignalR, AWS Chime, Performance Optimization, Accessibility Standards, ES6, JEST, React Testing Library, Playwright, Cypress, Resusable Component Libraries, Story Book
Timeline
Lead React and React Native Developer
Barclays, CAPGEMINI UK
10.2024 - Current
Senior React Developer
Beazley Insurance Via Capgemini UK
07.2023 - 09.2024
Senior React Developer - Video Banking Application
Barclays UK Via Capgemini UK
06.2022 - 07.2023
Senior React Developer
HSBC UK Via Capgemini UK
01.2022 - 05.2022
Full Stack Developer
Boots UK Via COGNIZANT UK
07.2019 - 01.2022
Lead Front-End Developer
Barclays UK
09.2015 - 06.2019
Senior UI Developer
COGNIZANT INDIA
06.2012 - 09.2015
Front-End Developer
HCL TECHNOLOGIES
09.2010 - 05.2012
Bachelor of Science - Computer Science
Jawaharlal Nehru Technological University