Hi,
I'm Ashish
Software Engineer

Backend & Distributed Systems · Applied AI. I build systems that stay correct under retries, crashes, and races — and I ship LLM features with evaluation harnesses that prove they work. Python · AWS · Postgres.

🌾 Rythu — live demo View work Résumé

About

Ashish Kosana at UMass Lowell graduation

I'm Ashish Kosana

Backend engineer who ships LLM-powered features and can prove they work. At Crewtron I build on a production AWS serverless platform (Lambda, DynamoDB, API Gateway, Cognito, CDK) and wired CloudWatch monitoring into Slack so errors surface with the affected users. On my own I build reliable systems — ledgerline (exactly-once payments), tick (a durable Postgres scheduler), and review-lens (a self-verifying LLM reviewer with an evaluation harness). First engineer in my family; I daily-drive Ubuntu on a UTM VM and care about how the system works underneath. Recent CS grad, UMass Lowell (Dec 2025), based in Tempe, AZ. Open to new-grad SWE roles.

Skills

What I work with

Backend & distributed systems in Python (FastAPI, PostgreSQL) on AWS serverless, plus applied-LLM work behind evaluation harnesses. Full-stack with Next.js / TypeScript; Flutter for mobile; Ubuntu / Linux day to day.

Python / FastAPI
Distributed systems
AWS Serverless
LLM / Applied AI

Also in the toolbox

Distributed systems Idempotency · exactly-once SKIP LOCKED FastAPI PostgreSQL / SQL LLM · RAG · MCP Evaluation harnesses AWS Lambda · CDK · DynamoDB Docker Next.js / React TypeScript C / C++ Linux / Ubuntu pytest · mypy · CI/CD

Operating systems

Comfortable across macOS + Linux. I daily-drive Ubuntu 26.04 (ARM64) in a UTM virtual machine on my Apple M4 — apt, shell scripting, systemd, drivers, manual partitioning — and I ship to Linux every day on AWS Lambda and Docker. I understand what the kernel does (processes, memory, and how programs reach it through system calls) and I care about how the system works underneath, not just the app on top.

Experience & Education

Software Engineer Intern — Crewtron

May 2026 – Present · Tempe, AZ

Ship features end to end on an AI-powered field-service platform: Python backends on AWS serverless (Lambda, DynamoDB, API Gateway, Cognito, CDK) + the Flutter client. Designed Cognito-secured REST APIs, wired CloudWatch monitoring into Slack, built a multi-agent LLM content system, and authored an API integration-test suite (~82% coverage).

B.S. Computer Science — UMass Lowell

Sept 2024 – Dec 2025

Graduated December 2025 · GPA 3.51 / 4.0 · Dean's List. Focus on software engineering and systems.

Work

More on my GitHub — 25+ public repos.

Contact

Open to new-grad Backend / Full-Stack / Applied-AI Software Engineer roles (authorized to work in the U.S. on F-1 OPT — STEM, ~3 years, no sponsorship needed to start). The fastest ways to reach me:

Email me LinkedIn