Apr 2022 – Oct 2025 · 3 yrs 6 mos · Bengaluru, Karnataka, India · On-site

• Architected a configuration-driven system to seamlessly ingest and transform data from multiple ad partners, automating operations and significantly reducing TAT for resolving 1P vs 3P data discrepancies and new partner onboarding.
• Reduced debugging time for ad delivery failures by over 80% (from 1 hour to 10 minutes) by integrating ’Sage,’ an in-house Win/Loss Analysis system that provided root-cause insights into ad quality and targeting issues.
• Owned the core backend design for the Earn platform, enabling brands to leverage PhonePe’s 500M+ user base for targeted campaigns (App Referrals, Surveys) with 20-50% lower CAC.
• Slashed P95 feed latency for recurring users by 90% (from 600ms to 80ms) by engineering an Aerospike caching strategy that served personalized feeds from a pre-indexed list of tasks.”
• Engineered the ’Task Attempts’ service in Java for user attribution and referral link generation, scaling to handle 1000 RPS during peak hours.
• Pioneered a real-time ETL pipeline using Python, Kafka, Debezium, and PostgreSQL, which cut database CPU utilization from 98% to 5% and reduced data read latencies.
• Built a Dropwizard-based anomaly detection service empowering data correction and alerting, which improved data accuracy for compliance and reduced user support tickets by over 80%.

Jun 2021 – Mar 2022 · 9 mos · Pune, Maharashtra, India · Remote

• Built a robust system for sending and queuing reports via emails which created an impact of around 20% on the revenues of the company by saving time for the account management and operations team by automating several reports and reporting.
• Developed and scaled the in-house CRM for gigs by developing customer high-level experience and enhancing usability for the internal operations team.
• Reviewed and assessed the products and technology used and implemented user tracking and user behavior analytics to improve product usability and experience.

Jan 2021 – Jun 2021 · 5 mos · United States · Remote

• Responsible for maintaining the project status, meeting reports, making roadmaps, and setting milestones with different clients and developers across the globe.
• Curated business requirement documents for new projects as well as for new features in existing projects.
• Devised Business Requirement Document for a product.

Jun 2020 – Mar 2021 · 9 mos · New Delhi, Delhi, India · Remote

• Responsible for developing, maintaining, and scaling the company website. Optimized SEO for the site and by increasing the organic traffic by about 125%.
• Contributed to the backend, wrote and scale APIs in Django.
• Developed 2 New cards along with maintaining the original ruby card.
• Built and scaled the in-house accessibility customer service software.

Apr 2020 – Apr 2020 · 0 mo · Gurugram, Haryana, India · Remote

• Built a quiz web app for toddlers and kids that supported multiple use cases and experiences, from a high-level user interface and data validation.
• Built back-end using PHP. Contributed in the Front-end.
• Assembled the pieces of the project to and built them into one.

Feb 2020 – Apr 2020 · 2 mos

• https://criodo.github.io/Crio-Launch-Feb-2020-priyanshu-mittal9/