Kumar Shashwat
B.E. Computer Science, IES College of Technology
4+
years engineering
30%
smaller Docker images
+130%
viewing conversion
60%
lower API latency
How I work
Pragmatic architecture. Measurable outcomes. No drama in production.
B.E. Computer Science, IES College of Technology
I work across the product stack, from crisp interfaces to dependable services and the data flows between them. My focus is making complex systems easier to use, operate, and evolve.
At Best Buy, Teamlease, and Urban Ground, I have shipped e-commerce, recruitment, and property workflows used by customers and internal teams across multiple markets.
Performance by design
SSR, virtualization, caching, and Core Web Vitals work that shows up in real user experience.
Systems that stay in sync
Event-driven services with Kafka, resilient integrations, and clear ownership boundaries.
Security in the workflow
Practical identity, access control, and session handling built into the product from day one.
Career timeline
Work that moved the numbers.
A track record of end-to-end ownership across e-commerce, recruitment, and proptech.
Software Engineer 2
CurrentBest Buy India/Bengaluru, India
- Integrated AI recommendation models into e-commerce product and landing pages, orchestrating personalized catalog feeds.
- Improved web and mobile response times through list virtualization and Next.js server-side rendering.
- Built reusable cross-page components and managed monorepo dependencies and package releases with Lerna.
Full Stack Developer · Team Lead
Teamlease/Bengaluru, India
- Led four developers building a cross-platform React Native and Expo recruiter application.
- Implemented Keycloak SSO and RBAC with silent JWT renewal to prevent session disruption.
- Reduced Docker image size by 30% using multi-stage builds and layer caching.
- Built NestJS and Kafka services syncing applicant updates to 10+ partner job boards.
- Integrated Google Meet scheduling and Elasticsearch-powered resume search.
Full Stack Developer
Urban Ground GmbH/Berlin, Germany · Remote
- Implemented Firebase two-factor authentication for sensitive renter deposit operations.
- Connected Stripe and ImmoScout24 APIs with resilient webhooks for listing syndication and deposits.
- Built multilingual listing URLs and an automated viewing scheduler that increased bookings by 130%.
- Optimized PostgreSQL indexes and cursors, reducing API latency by 60%.
- Created an asynchronous AWS S3 media pipeline for WebP conversion and thumbnails.
Capabilities & tools
A broad toolkit, used with intent.
Foundations and tools honed across enterprise systems and agile product teams.
Languages & foundations
Typed logic and core computer science
Frontend & mobile
Fast interfaces across devices
Backend & data
Services, queues, and persistence
Platform & tooling
Build, delivery, and access
Featured engineering
Systems with a job to do.
Selected case studies on scaling product workflows and making measurable improvements.
Personalized commerce, at catalog scale
A high-performance retail experience combining product recommendations, vector search, server-rendered pages, and reusable monorepo components.
- Personalized recommendations via vector search
- Sub-second SSR across 50k+ SKUs
Recruiter pipeline & interview automation
A cross-platform hiring workflow with real-time partner sync, secure tenant access, automated interview scheduling, and indexed resume search.
- Keycloak SSO with automated token refresh
- Kafka workers sync partner job boards
A multilingual rental marketplace
A German rental platform connecting listing syndication, deposits, viewing bookings, and automated media processing in one dependable workflow.
- 60% lower API latency after database tuning
- 130% more scheduled property viewings
Notes from the work
Engineering, explained clearly.
Next.js SSR and list virtualization for better Core Web Vitals
How windowed rendering and carefully chosen server boundaries made a large catalog feel immediate.
Scaling event-driven services with Kafka and NestJS
Practical patterns for retries, idempotent writes, and reliable synchronization across partner APIs.
Smaller Docker images with multi-stage builds
Keep build tooling out of production images and make deployments lighter and faster.
Let’s connect
Have a hard problem or a role in mind?
I’m open to senior full stack, frontend lead, and backend engineering opportunities. The quickest way to reach me is email.
Write to me