Koushik Manna
Technology Leadership & Digital Transformation
Architecting unified commerce platforms that serve 30M+ customers, and leading engineering organizations of 50-60+ through large-scale digital transformation.
A builder's approach to enterprise scale
I'm Koushik, a Technology Executive & Enterprise Architecture Expert specializing in designing and scaling complex digital commerce platforms that drive business transformation.
Engineering leader with 17+ years of experience building and scaling commerce platforms, modernizing technology, and helping teams do their best work. Led organizations of 50–60+ engineers across B2C, B2B, Quick Commerce, and omnichannel journeys, supporting platforms used by 30M+ customers and 17K+ sellers, and powering $2B+ in B2B & B2B2C business. Blend clear strategy with hands-on architectural thinking across cloud, microservices, mobile, POS, and API ecosystems.
Currently, I'm the Head of Unified Commerce at Decathlon, architecting enterprise solutions that seamlessly integrate B2B, B2C, and omnichannel retail experiences. My expertise spans platform design, system architecture, and delivering solutions that drive measurable business impact at scale.
Education
“Enterprise-grade platforms for transformative commerce experiences.”
17+ years leading technology at scale
Head of Unified Commerce / Senior Engineering Manager
Decathlon Sports India
Lead 50+ engineers across Web, Mobile, Desktop, and Microservices, cutting operational costs 20% and speeding delivery 30% through AI-assisted workflows. Drove 3x faster web performance and 50% lower server costs via the Svelte migration, 50% lower dev costs through the Flutter app relaunch, and 70% lower deployment costs via the Universal POS rollout. Leading a Vespa.ai-powered Vector Search & Recommendation engine to make product discovery more relevant and personal.
Group Manager, Engineering
Jio Platforms Limited (JPL)
Led 60+ engineers and multiple engineering managers, scaling Ajio Seller Central to 17K+ sellers and B2B storefronts reaching 10M+ customers, delivering core technology behind a $2B+ B2B & B2B2C Fashion & Lifestyle business ranked No.1 in India. Served as Enterprise Architect for the Distributor Management System across FMCG, Medicine, and Retail. Architected the GraphQL Federation API Gateway, cutting latency and infrastructure costs while unifying data access across a portfolio of 6 Flutter apps and 4 UI platforms.
Senior Software Engineer
General Electric (GE) - Oil & Gas
Architected mobile, Node.js, and UI applications for industrial IoT on GE Predix, building the SWIRL dashboard-authoring framework with Angular & PolymerJS. Developed a Node.js/Elasticsearch editor for PrestoDB enabling unified API + RDBMS querying, and prototyped real-time live drawing over WebRTC video calls.
Technical Lead
IBM India Private Limited
Led frontend architecture for IBM Sales Chat and delivered the TAP Award-winning Vacation Planner on IBM Mobile First. Served as IBM Cloud Explorer and JavaScript expert, leading the Flex-to-Dojo UI migration, delivering Watson API integrations, and working across AngularJS, IBM One UI, IBM Design System, and PHP.
Web Developer
Symmetrix Systems Private Limited
Developed 50+ full-stack websites and 6 high-scale e-commerce stores using Magento, Zend MVC, OSCommerce, and WooCommerce, managing the full project lifecycle from requirements through server administration.
Where I add the most value
Leadership
- Engineering Leadership (60+ engineers)
- Digital P&L & Budget Ownership
- Workforce Planning & Org Design
- Executive & Stakeholder Communication
- Talent Development
Architecture
- TOGAF 9.1 Enterprise Architecture
- Solution & Reference Architecture
- API & Integration Strategy
- Cloud-Native Microservices
- DevSecOps & SDLC
Commerce & Platforms
- Unified & Omnichannel Commerce
- B2C, B2B & B2B2C
- Marketplaces & Seller Ecosystems
- Quick Commerce
- Distributor Management
Technology
- Java / Spring Boot
- Node.js / Flutter
- React / Vue / Svelte
- GraphQL Federation
- Vespa.ai / Elasticsearch
- Drools Rule Engine
- AI/ML Prompt Engineering
Cloud & DevOps
- AWS / GCP / Azure / IBM Cloud
- Kubernetes / Docker
- GitHub Workflows / Jenkins / Argo CD
- Dynatrace / Wiz
- Amplitude / Firebase Analytics
Certifications
Platforms I've architected
Decathlon Unified Commerce
Spearheaded the development and execution strategy for a high-scale unified commerce ecosystem, unifying B2C, B2B, and Quick Commerce journeys under one architecture — anchored by the Decathlon Flutter App and the Decathlon SvelteKit web platform, which combines SSR, CSR, and ISR together for cutting-edge, high-performance rendering. Also drove a Java and Drools-based Promotion Engine powering the Checkout & Payment ecosystem.
Hyperlocal Quick Commerce
Engineered a cost-optimized Quick Commerce solution enabling rapid delivery from any Decathlon India store within a 10km radius, with optimized logistics and inventory integration.
Ajio Seller Center Dashboard
Developed a comprehensive analytics and management portal for B2B merchants, with real-time transaction processing, inventory management, and deep data insights via GraphQL.
Universal POS
Architected a unified point-of-sale platform to replace fragmented legacy checkout systems across store formats, simplifying deployment and cutting operational overhead.
Vector Search & Recommendation Engine
Led development of a Vespa.ai-powered search and recommendation engine combining semantic search, approximate nearest-neighbour retrieval, and multi-signal ranking to make product discovery more relevant and personal.
Let's talk about what's next
Whether it's unified commerce, engineering leadership, or the next big platform bet — I'd love to hear from you.