sumit tiwari

Staff Software Engineer @ Visa

About

As a Lead Software Engineer at Deloitte, I bring over 13 years of experience in leading diverse teams to design, develop, test, and deploy scalable web-based applications. My work focuses on leveraging MACH architecture and cloud technologies, including AWS and GCP, to build reliable distributed systems. I have contributed to the development of Ecommerce web applications and PIM solutions using platforms like Shopify and Bluestone, along with technologies such as Java, Python, ReactJS, and Spring Boot. My expertise includes software development, system architecture, and team leadership, supported by a Google Cloud Certified Professional Cloud Architect credential. I am committed to providing technical guidance in architectural decisions to ensure optimal solutions for clients. My approach emphasizes collaboration, innovation, and delivering robust, efficient applications tailored to meet organizational goals.

Country

United Kingdom

City

London

Industry

Information Technology & Services

Skill

Go (Programming Language), Integration Testing, Unit Testing, GraphQL, pipelin, Test-Driven Development, Generative AI, Agentic AI, Vertex AI, Gemini Enterprise, RESTful WebServices, MACH Architecture, Docker, Kubernetes, API Development, Leading Development Teams, E-Commerce, Shopify, Bluestone PIM, Python

Experience

Staff Software Engineer

Visa

2026-5 - Present · 4 mos

London, UK

Lead Software Engineer

Deloitte

2021-11 - 2026-5 · 4 yrs 7 mos

London Area, United Kingdom

Lead a team of 12+ software Engineers/Vendors in the design, development, testing, deployment, and maintenance of web-based applications. Provided technical expertise during client meetings, presentations regarding proposed solutions or existing products, services offered by organization. Designed and implemented reliable and scalable distributed systems leveraging MACH architecture and latest cloud technologies. Designed and developed Ecommerce web applications and PIM solutions with Shopify and Bluestone platforms. Designed and developed software applications using Java, Python, ReactJS, Spring Boot, AWS and GCP Cloud. Provided guidance on architectural decisions such as technology stack selection, framework implementation. Deployed software solutions using industry-standard continuous integration, continuous delivery pipelines using Openshift, Tekton and Jenkins. Implemented agile development practices across multiple projects, ensuring timely delivery of high-quality solutions. Led extensive code refactoring and optimization using design patterns, resulting in improvement in processing time. Established comprehensive performance monitoring (Splunk, Dynatrace) and integrated security/quality checks (Cycode, Sonarqube) to enforce engineering best practices. Performed detailed analysis of current systems and processes to identify areas for improvement or optimization. Mentored junior developers in software engineering principles, coding techniques, and debugging strategies.

Senior Associate

Cognizant

2015-4 - 2021-11 · 6 yrs 8 mos

Slough, United Kingdom

Designed, developed and supported multiple critical Web Applications using Java, Groovy and Mongo Database. Frontend development using Angular JS, Javascript, HTML and CSS. Designed and implemented OpenID Authentication flow for Identity Access and Management(IAM). Created and configured continuous integration CI/CD Pipeline using Jenkins. Performance migration from on premise to cloud using AWS, EC2 instances, VPCs and Jenkins. Followed Agile Methodology for development and delivery.