Rajat Panjwani

Staff Software Engineer at Walmart

Bengaluru, Karnataka, India

About

10 years of experience in Software development, Application life-cycle, and framework designing.

Experience

  • Walmart Global Tech India (Full-time · 5 yrs 1 mo)
    • Staff Software Engineer
      Oct 2024 - Present · 1 yr 9 mos

      - Lead architecture and technical strategy for last mile delivery systems operating at ~4M daily orders and ~2M trips/day under strict latency and SLA constraints. - Design scalable distributed, event-driven systems for real-time dispatch, trip lifecycle management, and driver coordination. - Solve complex optimization problems including dynamic batching, intelligent dispatch, and route optimization across a nationwide network. - Build high-throughput, low-latency services enabling sub-second decision-making for order assignment and routing. - Improve ETA accuracy and system reliability, leveraging data-driven approaches and fault-tolerant design in a distributed environment. - Lead design reviews and influence system architecture and engineering standards across teams. Mentor engineers and drive cross-functional initiatives to improve throughput, latency, and delivery efficiency at scale.

    • Senior Software Engineer
      Jun 2021 - Oct 2024 · 3 yrs 5 mos

      - Build a scalable configuration platform from scratch, designed to support diverse use cases across the entire Last Mile Delivery (LMD) ecosystem. This platform improved flexibility, reduced duplication, and enabled faster feature rollouts. - Led multiple business-critical initiatives end-to-end, from requirement gathering through design, development, and final release. The constant focus was on reducing system complexity and latency while maintaining high coding standards and scalability. - Played a key role in driving engineering best practices within the team by enforcing the use of standard design patterns and promoting clean, maintainable architecture. - Optimized the last-mile tracking integration with the trip execution engine, significantly improving the accuracy of driver offers and delivering precise, real-time ETAs to end customers. - Developed a robust observability framework using Prometheus and Grafana, implementing proactive alerting and monitoring systems that enhanced system reliability and reduced incident response time.

  • Unicommerce (2 yrs)
    • Senior Software Engineer
      Sep 2020 - Jun 2021 · 10 mos

    • Software Engineer II
      Jul 2019 - Sep 2020 · 1 yr 3 mos

  • Software Engineer at Orange Business Services
    Oct 2018 - Jul 2019 · 10 mos

  • Gemini Solutions Pvt Ltd (2 yrs 8 mos)
    • Senior Software Engineer
      Jul 2018 - Sep 2018 · 3 mos

    • Software Engineer II
      Jul 2017 - Jul 2018 · 1 yr 1 mo

    • Software Engineer
      Jul 2016 - Jul 2017 · 1 yr 1 mo