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kevin/khaja mujahiddin
IN

I am a senior software engineer · backend & data platforms

Selected work

Projects

Fifteen builds across backend platforms, RAG systems, computer vision, and analytics. Click a row for the write-up and source.

15 entries

Labs

Tiny live benches

Playful meters inspired by Optum latency targets and Staples authorization reliability — illustrative only, not production telemetry.

Kafka → API latency

Pulse a synthetic downstream path toward the sub-100ms band.

86 ms p95

Auth success band

Payment gateway reliability hovering near the 99.7% mark from Staples work.

99.70%

Experience

Where I've shipped

  1. Optum (UnitedHealth Group)

    Senior Software Engineer - Data Platform

    Jul 2025 – PresentHartford, CT

    • Owned design and deployment of distributed ETL and microservice platform components using Python, FastAPI, and PySpark on AWS/Azure, improving throughput by 35%.
    • Architected resilient REST APIs and async messaging pipelines with Kafka and SQS, cutting downstream API latency to sub-100ms at peak loads.
    • Implemented rigorous CI/CD workflows using GitHub Actions and Docker, reducing integration bugs by 25% and achieving zero-downtime releases.

  2. Staples

    Software Engineer

    Jan 2022 – Jul 2023Chennai, India

    • Re-architected core B2B payment gateway microservices using Java 17, Spring Boot, and PostgreSQL, lifting authorization success from 97% to 99.7%.
    • Optimized relational database queries, indexing strategies, and multi-tier Redis caching, slashing p95 reporting API response times from 800ms to 600ms.
    • Engineered near-real-time data synchronization between MongoDB order datastores and PostgreSQL warehouses across 40+ regional markets.

  3. SRIK Consulting (Client: BMW Group)

    Software Engineer

    Aug 2019 – Dec 2021Hyderabad, India

    • Developed async vehicle telemetry ingestion services for 50,000+ connected vehicles using Java, gRPC, and Kafka Streams.
    • Designed partitioned PostgreSQL and Redis schemas for 100M+ configuration records, accelerating dealer feature onboarding by 50%.
    • Containerized enterprise legacy monolith into Docker microservices deployed on AWS EKS, increasing release frequency 3x.

About

New Haven, systems, and a compiler nickname

I'm Khaja Mujahiddin Mohammed — a senior software engineer for backend and data platforms, based in New Haven, Connecticut. I like systems that stay quiet when traffic spikes and pipelines that tell you the truth.

I earned an M.S. in Data Science at the University of New Haven after a B.Tech in Hyderabad. These days I work at Optum on distributed ETL and microservice platforms. Before that: B2B payments at Staples, then vehicle telemetry for BMW Group through SRIK Consulting.

When a problem needs retrieval, I reach for RAG. When it needs throughput, I reach for Kafka, Kubernetes, and a well-observed API.

Contact

Let's compile something

New Haven, CT. Open to backend, data-platform, and applied-ML conversations.

khajamujahiddin@gmail.com