Headline

SWE @Paytm | ex-SWE Intern @Paytm, @Simpl, @Eternz, @Fleeter | Full-Stack AI Developer | BIT Mesra CSE’26

About

Hey! I'm Ankit, a Software Engineer at Paytm and CS graduate from BIT Mesra. Over the past couple of years, I've worked through internships and now full-time on backend systems, REST APIs, distributed systems, and production services. At Paytm, I've built high-scale backend APIs, implemented Prometheus-based observability across Kafka and RabbitMQ consumers, improved data consistency using MongoDB and Cassandra, and worked on production reliability and media pipelines. Before that, I interned at Simpl, Eternz, and Fleeter, where I worked on backend APIs, fraud detection, financial systems, automation tools, and deployment pipelines using technologies like Go, Node.js, Ruby, PostgreSQL, MongoDB, AWS, and Jenkins. Apart from work, I enjoy building projects that solve real problems. I built Bitacademia, an academic management platform adopted by the Computer Science department at BIT Mesra, serving 500+ students and faculty. I also built CursorTalks, a voice-driven AI coding assistant using LangChain, LangGraph, GPT-4o, and MongoDB that supports multi-step planning, code execution, and hands-free interaction. During college, I was involved with the Finance Club and the Fine Arts Society, where I worked on organizing events, managing logistics, and contributing to technical initiatives. I'm primarily interested in backend engineering — building scalable APIs, distributed systems, and reliable infrastructure. I'm also exploring AI systems and agentic workflows, and I enjoy working on products that solve practical problems.

Location

Noida

AI stack

codex

cursor

claudecode

Work experience

Software Engineer at Paytm, Jul 2026 - Present · 2 mos

Software Engineer Intern at Paytm, Jan 2026 - Jul 2026 · 7 mos, • Built a coordinate-aware B2B API for Paytm's Train-to-Bus cross-sell flow, surfacing real-time bus availability and deep-link redirects for waitlisted passengers at 30K+ requests/day. • Extended fare slasher eligibility to anonymous users by redesigning promo resolution and session-safe cache invalidation, supporting 3M+ search page requests/day while preserving authenticated-user offer integrity. • Designed a batch photo upload API (up to 10 images/request) with concurrent processing and partial-failure handling, cutting client-side HTTP requests by 90%; extended the media pipeline to auto-propagate images across parent and via routes, and hardened upload validation and API contracts. • Strengthened backend data integrity via AES-256 encrypted audit logging across Cassandra and MongoDB, MongoDB idempotent upserts across Kafka provider pipelines, and Cassandra lightweight transactions for conflict-safe operator onboarding. • Improved backend correctness by fixing API validation errors, HTTP response-code masking, and route-resolution logic affecting deal-creation workflows. • Restored 40K+ structured log entries/day after a logging framework migration, and resolved a trust-badge regression on the bus search results page. • Resolved a notification delivery issue caused by third-party messaging template limits by introducing shortened redirect links for booking confirmations. • Developed configuration-driven promo auto-application across Search, Seat Layout, and Checkout, letting business teams control offer rollout without backend deployments. • Rolled out Prometheus observability across ~20 Kafka/RabbitMQ consumer processes spanning 5 microservices through metrics, health endpoints, and consumer telemetry; also executed a service-discovery migration across 28 production services to a new infrastructure domain. • Delivered backend features, platform reliability improvements, and observability across Node.js, Go, and Python microservices powering Paytm Travel.

Engineer Intern at Eternz, Sep 2025 - Nov 2025 · 3 mos, Bengaluru, Karnataka, India, • Improved logistics and delivery workflows by enhancing pin code management, backend business rules, and data consistency across order and logistics tables. • Developed and optimized financial and invoice-related APIs, including on-demand PDF generation and direct-to-S3 file uploads using presigned URLs. • Consolidated application logging by migrating print-based logs to a structured Python logging system for better observability and debugging. • Implemented internal CMS diff tools, automated bulk product/variant updates via cron-driven CSV processing, and improved admin and content workflows.

Engineer Intern at Simpl, May 2025 - Aug 2025 · 4 mos, Bengaluru, Karnataka, India, • Reduced backend load by optimizing external calls in the Pay-in-3 transaction flow, cutting redundant requests by 75% without affecting functionality. • Built and deployed high-performance backend APIs for updating user credit configurations, serving millions of requests across core transaction services with low latency. • Migrated backend data usage from legacy merchant configuration tables to new product configuration tables across multiple services, improving code maintainability and deployment flexibility. • Created internal documentation for APIs and system behaviors to ease onboarding and support better team collaboration across backend services. • Extended fraud detection infrastructure by implementing session identifier extraction from HTTP cookies. • Enhanced API reliability by correcting HTTP response codes to follow REST standards, leading to cleaner error handling.

Webmaster at Fine Arts Society, BIT Mesra, Jun 2024 - Apr 2025 · 11 mos, • Redesigned FAS website, enhancing UI for improved user experience. • Organized Brush Hour session at Spectra’24, engaging 100+ participants in competitive art challenges.

Full Stack Engineer at BITAcademia, May 2024 - May 2025 · 1 yr 1 mo, Ranchi, Jharkhand, India, • Developed and enhanced 30+ features across a MERN Stack academic management platform serving 500+ students. • Built scalable frontend components and backend REST APIs, delivering new functionality while improving platform performance, reliability, and user experience. • Collaborated with a team of 7 developers to design, implement, test, and deploy end-to-end features following Git-based development workflows. • Worked across the full software development lifecycle, including feature development, debugging, API integration, database design, code reviews, and production deployments.

Associate at Fine Arts Society, BIT Mesra, Mar 2023 - Jun 2024 · 1 yr 4 mos, • Contributed in drawing and painting of Staircase on the occasion of onboarding of K23 batch to BIT Mesra.

Education

Bachelor of Technology - BTech, Computer Science, Birla Institute of Technology, Mesra

Intermediate, Sri Chaitanya College of Education

Public links

github: https://github.com/Ankit8125