Sumit Vairagar
Technology Consultant | Backend Engineer | AI BuilderI'm a Technology Consultant and Software Engineer with 14 years of experience delivering scalable backend systems. My work sits at the intersection of event-driven architecture and modern agentic AI development — I use tools like Claude Code, Kiro CLI, and GitHub Copilot not as shortcuts, but as force multipliers across the full delivery lifecycle: codebase comprehension, story design, implementation planning, development, and legacy modernization.
Currently at Technogise, I work on complex distributed systems — most recently owning end-to-end delivery of a business-critical feature inside a large-scale legacy system, from codebase comprehension to production. Before that, I led and mentored cross-functional teams of 15+ engineers at ThoughtWorks, providing strategic technical guidance on system architecture.
Work Experience
TechnogiseMay 2025 – Present
Technology Consultant- Used Claude Code and Kiro CLI to own end-to-end delivery of a business-critical feature in a large-scale legacy distributed system — from codebase comprehension to production.
- Leveraged Claude Code to deep-dive a complex legacy codebase, rapidly mapping architecture, domain boundaries, and integration points.
- Translated high-level business requirements into scalable technical designs, collaborating directly with stakeholders to resolve edge cases.
ThoughtWorksSep 2021 – May 2025
Lead Consultant- Led and mentored a cross-functional team of 15+ engineers, driving high-impact delivery across multiple projects.
- Architected and delivered a mission-critical, event-driven customer onboarding system with resilient distributed transactions using Java, Spring Boot, Kafka, and the SAGA pattern.
- Collaborated with stakeholders to provide strategic technical guidance on system architecture.
Springer NatureJan 2019 – Sep 2021
Software Development Engineer (Backend)- Spearheaded adoption of Kotlin and TDD for backend systems, improving code quality and team velocity.
- Integrated multiple microservices with Razorpay to build a robust payment processing system using Kotlin, Java, and Spring Boot.
- Mentored junior engineers, improving team performance and capability.
Lava Labs Sdn BhdFeb 2017 – Dec 2018
Technical Lead- Designed and developed backend for a multitenant workforce management system with REST APIs for web and mobile clients.
- Improved route search performance from 30s to 2s — a 15x improvement — using Java, Spring Boot, and MySQL.
Yash TechnologiesMar 2016 – Feb 2017
Module Lead- Engineered and led a team on an HR process management system for a large enterprise.
- Improved operational efficiency by 30% through streamlined workflows.
MMF SystemsDec 2013 – Feb 2016
Senior Software Engineer- Maintained and enhanced a critical healthcare solution; onboarded 5 new clients, increasing revenue by 15%.
- Built an internal cloud server management tool, reducing infrastructure costs by 50%. Tech: Java, Spring, Hibernate, MySQL, jQuery, AWS.
SPAR SolutionsMar 2011 – Jun 2013
Software Engineer- Developed an internal cloud server management system, optimizing server usage and reducing infrastructure costs.
- Integrated with third-party cloud providers (Amazon, Opsource). Tech: Java, Spring, Hibernate, MySQL, Bootstrap, jQuery.
Open Source
The missing UI toolkit for on-device LLMs in Flutter. Provides device checks, model management, recommendations, and chat/vision/tool-calling widgets. Specmatic Sample Generator Skill Contributed to an AI skill that generates API sample requests/responses from OpenAPI specs for Specmatic, enabling contract-driven testing workflows.Education
Tilak Maharashtra VidyapeethBachelor of Computer Application (BCA) · Completed 2009
Technical Skills
AI-Assisted DevelopmentBuilding with and leveraging agentic AI tools across the full delivery lifecycle. Backend & Architecture14 years of experience designing and building scalable distributed systems.Event-Driven Architecture
Cloud & DevOpsDeploying and managing infrastructure in the cloud. FrontendBuilding modern web applications when needed. OtherTools and platforms for automation and chatbot services.