Hello, I'm

Abhigyan

Senior Software Engineer

About Me

I'm a software engineer who genuinely enjoys building things. Not just shipping features — understanding systems end to end, from the database query plan to the user experience. Five years across fintech, gaming, and enterprise AI, and the pattern is the same: I see a problem, I build something to solve it, and I learn something new along the way.

At Walmart, I build AI platforms — production RAG systems, multi-agent orchestration, and LLM-powered developer tooling used across the org. Before that, I was the founding engineer at Podeum, taking a gaming platform from zero to 10K daily users. The common thread: I gravitate toward hard problems where distributed systems meet emerging technology.

When a new tool drops — a new LLM, an agent framework, a dev tool — I don't just read the blog post. I build something with it. That's where the experiments below come from. Some turned into product concepts, some into architecture patterns I now use at work, and some were just fun to build.

Education

IIT (B.H.U), Varanasi

B.Tech (2016–2020)

Experience

5+ Years

Fintech · Gaming · Enterprise AI

Currently

Building AI Platforms

At Walmart

On My Workbench Right Now

Multi-Agent Orchestration MCP Protocol Local LLM Inference Agent-Native Dev Tooling Spec-Driven Development Hybrid RAG Pipelines

Technical Expertise

Backend & Distributed Systems

Spring Boot Dropwizard Kafka Workflow Engines Java Python

Cloud & Infrastructure

AWS Docker Kubernetes CI/CD MySQL

AI & LLM Systems

RAG Multi-Agent Milvus Vision LLMs Claude Code Cursor

Data & Observability

ELK Stack Big Data SonarQube Evaluation Pipelines

Experience

Software Engineer 3

Walmart
May 2024 – Present
  • Cut P95 latency of core workflow APIs from ~200ms to ~130ms while scaling to 1500+ concurrent executions/sec — through database query optimization and infrastructure tuning
  • Designed multi-tenant onboarding architecture supporting multiple teams and workflow engines per tenant within a shared cluster
  • Built production AI platform: RAG pipelines (Docling, pdfplumber, Vision LLMs), hybrid retrieval (Milvus semantic + BM25 with RRF + cross-encoder re-ranking), and LLM response generation with evaluation pipelines
  • Implemented stateful multi-agent orchestration with task decomposition, parallel execution, dynamic model selection, and deterministic pause/resume for human-in-the-loop code review
  • Built AI-powered developer tooling and introduced spec-driven development workflows using LLMs across the backend team
  • Mentored a junior engineer while owning services end-to-end within a 6-member backend team

Software Engineer 2

Rakuten
May 2023 – May 2024
  • Designed high-volume payment batch processing systems and APIs enabling third-party integrations across multiple Rakuten brands
  • Built a Java-based mock server framework simulating external payment providers — improved integration test coverage and reliability

Founding Engineer

Podeum
July 2022 – May 2023
  • Built and scaled backend services from scratch (Java/Spring) — grew from 0 to ~10,000 daily active users
  • Designed core platform: authentication, virtual economy, in-app purchases, and real-time live score feeds
  • Led technical decisions across the stack as the first engineering hire

Software Developer

Morgan Stanley
Oct 2020 – June 2022
  • Developed and maintained Big Data applications for financial data processing pipelines
  • Set up CI/CD pipelines with Jenkins and Sonar — improved code quality and deployment workflows

What I've Shipped

Production AI Platform

RAG pipeline with hybrid retrieval (BM25 + semantic, RRF, cross-encoder re-ranking), Vision LLMs for OCR, and LLM response generation with evaluation. Live in production at Walmart.

RAG Milvus Vision LLMs Python

Multi-Agent Orchestration

Stateful agent coordination with task decomposition, parallel execution, and deterministic pause/resume. Powers human-in-the-loop code generation and review cycles in production.

Multi-Agent Orkes Workflow State

High-Throughput Workflow APIs

1500+ synchronous executions/sec. P95 latency cut from 200ms to 130ms. Multi-tenant architecture isolating multiple teams and workflow engines on a shared cluster.

Spring Boot Kafka Multi-tenant

Gaming Platform (0 → 10K DAU)

Built the entire backend from scratch as founding engineer — auth, virtual economy, in-app purchases, real-time live scores. Scaled to 10K daily users.

Java Spring Real-time

Payment Processing at Scale

High-volume batch processing across multiple Rakuten brands. Built a mock server framework to simulate external payment providers for reliable integration testing.

Java Batch Processing Fintech

AI-Powered Dev Tooling

Spec-driven development workflows using LLMs. Internal tools that make the whole backend team faster — not just me. Introduced AI-assisted code review and generation cycles.

LLMs Developer Experience Spec-Driven

Experiments

Things I build when a new idea won't leave me alone

Let's Connect

Always up for talking about systems design, AI infrastructure, or whatever new tool came out this week. If you're building something interesting, I'd love to hear about it.