Sachin Kottarathodi's Space

Resume

About Me

Senior Architect with a strong focus on building distributed systems at scale. Skilled in writing and reviewing code, with hands-on experience in troubleshooting, monitoring, and ensuring operational excellence. Expertise includes Java, Python, public cloud platforms like GCP and Azure, and data processing and orchestration technologies such as DataProc, BigQuery, Spark and Airflow. Solutions are guided by a commitment to pragmatic design, long-term maintainability, and high performance across diverse system landscapes.

So Far

What I have done:

  • Built and scaled Zero-to-One products, prioritizing maintenance from system inception.
  • Led Data Engineering solutions supporting Walmart’s supply chain ecosystem.
  • Developed critical systems processing over 2 billion requests daily with millisecond response times.
  • Formulated strategies for seamless cloud adoption and legacy system migration.
  • Collaborated with cross-functional teams to deliver impactful solutions.
  • Mentored team members, optimized tech processes.

What Next

I would like to continue:

  • Writing Code.
  • Driving tech strategy for organizational-wide impact.
  • Building applications with design principles taken into consideration for extensibility and maintenance.
  • Engaging with peers and leaders to enhance personal and professional growth.

Experience

Principal Software Engineer at Walmart Global Tech India

Bengaluru | 02/2025 - Present

    Staff Software Engineer at Walmart Global Tech India

    Bengaluru | 05/2022 - 1/2025

    • Built solutions under Supply Chain Replenishment Pillar, which generated optimized inventory plans and distributions to over 4500 Walmart Stores.
    • Collaborated with Architects and Leadership to drive initiatives in Platform Engineering Pod. Made significant design and code contributions to the platform libraries, optimizing for code reuse and reliability, which allowed for reduced development times and improved observability and stability in production environments.
    • Strategized Cloud Cost Reduction within the pillar, documented and published guidelines, streamlined resource provisioning and utilization on Google Cloud which led to cost reduction by over 50%.
    • Optimized Data Engineering workloads to meet SLAs, redesigned the Plan Generation System to reduce e2e runtime by over 70%.
    • Engineered a highly dynamic batch allocation system to consider workloads based on data availability and SLA constraints, while addressing Failover, High Availability and Disaster Recovery concerns. The design allowed for quickly scaling out the applications over 100% workloads.

    Senior Software Engineer at Walmart Global Tech India

    Bengaluru | 09/2020 - 04/2022

    • Designed and coded solutions, migrated services from legacy private cloud to Kubernetes on Azure.
    • Reviewed code, participated in on-call activities, debugged issues in production.
    • Built pipelines using Spark, Java, Airflow, BigQuery on GCP.

    Senior Software Engineer at InMobi

    Bengaluru | 03/2018 - 08/2022

    • Led core component design, team operations, product scaling, feature delivery, and early client interactions for the Fraud Defense product, while also managing escalations and collaborating closely with product and business teams. Built the beta version of Fraud Defense on AWS and later successfully migrated the system to Azure for production-scale operations.

    • Focused on improving resiliency and maintaining sub-millisecond latency at scale for the InMobi Affiliate Platform, which processes over 2 billion requests daily, while driving Azure cost optimization initiatives.

    • As a core member of the InMobi Security Council, reviewed system designs for security, published Azure CosmosDB security guidelines, and integrated security assessment tools into the central build system.

    Staff Software Engineer at Druva

    Bengaluru | 08/2015 - 02/2018

    • Part of the team that redesigned the product as per SOA principles. Redesigned the database schema and handled data migration of the production database.
    • Integrated Phoenix with AWS Marketplace. Kudos from the exec team for delivering amidst tight deadlines. Developed a good understanding of cloud platforms while building features using AWS services.
    • Handled engineering escalations regularly.

    Associate Consultant at Adobe

    Bengaluru | 06/2014 - 07/2015

    • Started my career at Adobe, part of the team that built content management systems for some of Adobe’s top clients.

    Skills

    Java, Python

    Spring Boot

    Spark, Airflow

    Data Engineering, Distributed Systems

    Kafka, Cassandra

    Design Patterns

    GCP, Azure, AWS

    Achievements

    Redis 'Beyond Cache' Hackathon Runner-Up

    • Built a low latency, microservice-based real-time fraud detector, that makes use of Redis’s extended capabilities through modules and data structures to identify internet fraud in real-time. The event was conducted by Redis Labs during “Redis Day” Bangalore. More Details here. Featured on the Redis Developer’s Podcast and published a blog on Redis learn.

    Engineering Excellence Award at Walmart