Nishant Katoch
@nishantkatoch
Backend Tech Lead building reactive Java microservices for high-traffic commerce and telecom.
IndiaWhat I'm looking for
I’m a Backend Tech Lead with end-to-end experience delivering high-traffic Java microservices for US-scale e-commerce (Ulta Beauty) and telecom (Verizon). I’m deeply hands-on with Spring WebFlux, Project Reactor, Kafka, and event-driven architecture—focused on making reactive systems fast, reliable, and secure.
In my current role, I re-implemented legacy C++ line record pipelines into Spring Boot + WebFlux on Red Hat OpenShift, porting business logic and request/response contracts. I also own an aggregator service with 25 downstream APIs, handling multi-upstream calling and per-client Basic Auth with multi-user credential management through Spring Security.
At Ulta Beauty, I owned the orchestration layer across cart, checkout, order, price, and payment, integrating MongoDB operations and Commercetools APIs within a 40+ microservice ecosystem. I reduced API response time by ~20% (800ms → 640ms) by migrating RestTemplate to WebClient, removing .block() anti-patterns, and validating performance under Black Friday peak load.
I build resiliency and correctness into production: Resilience4j circuit breakers/retry/rate limiting to eliminate cascading failures, and GCP Pub/Sub order + payment pipelines with at-least-once delivery plus idempotent consumers to prevent payment duplication. I enjoy taking ownership from API design through cloud deployment (Cloud Run, BigQuery, GCS, Pub/Sub, IAM, logging) and mentoring engineers to become independent WebFlux developers.
Experience
Work history, roles, and key accomplishments
Re-implemented legacy C++ line record pipelines in Spring Boot and Spring WebFlux on Red Hat OpenShift, porting request/response contracts and business logic to a reactive stack. Owned an aggregator service with 25 downstream APIs, implemented reactive Redis caching with Kafka audit trails, and led CI/CD and security scanning (SonarQube, Fortify, 42Crunch, BlackDuck) to improve production reliabil
Reactive E-Commerce Lead
Ulta Beauty
Jan 2022 - Feb 2026 (4 years 1 month)
Owned the orchestration layer and core services (cart, checkout, order, price, payment) across a 40+ microservice ecosystem, integrating MongoDB operations and Commercetools APIs. Reduced API response time ~20% (800ms→640ms) by migrating RestTemplate to WebClient and eliminating .block() anti-patterns, and built a GCP Pub/Sub event-driven order + payment pipeline with idempotent consumers to preve
Integration & Analytics Dev
AdYogi
Feb 2021 - Jan 2022 (11 months)
Integrated Google Ads and YouTube Data APIs into a unified performance dashboard, eliminating daily manual reporting. Built live Shopify catalog sync to automatically pause out-of-stock products from active ad campaigns in real time.
Built auto job-posting automation for the PSU team, improving throughput by 150% while consistently hitting quarterly targets. Automated internal workflows and web crawlers, reducing manual effort by 90% and PSU data collection effort by 70%.
Education
Degrees, certifications, and relevant coursework
Rayat Bahra University
Bachelor of Technology, Electronics & Communication Engineering
2011 - 2015
Completed a B.Tech in Electronics & Communication Engineering at Rayat Bahra University in Chandigarh from 2011 to 2015.
Tech stack
Software and tools used professionally
Availability
Location
IndiaAuthorized to work in
Job categories
Skills
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