Open to contract work · Kathmandu, NP
Senior backend engineer building production SaaS and agentic AI systems.
I've been building with Python and Django since 2019, mostly on the parts of a product people only notice when they break: billing, logins, multi-tenant data and event pipelines. Lately that includes AI agents, which I trust about as much as I trust a cron job nobody's checked on.
Right now
Senior Backend Engineer at UXCam. Lately I've been building AI agents, and the evals that keep them honest.
Selected work
Longer write-ups of real projects: what the problem was, how I built it, and what I'd change if I did it again.
01 · 2025Senior Backend Engineer
Moved a mobile analytics platform from a PHP monolith to Python microservices in six months, then built its billing system and a 100K-a-day event queue.
02 · 2023Software Engineer → Team Lead
A multi-tenant HR suite serving 20+ companies from one Django codebase, with automated payroll for 500+ employees a month. I went from engineer to team lead.
03 · 2026Backend Engineer (sole developer)
A staff chat assistant for a restaurant platform. Gemini answers through 68 read-only, permission-checked report tools, scored by an 86-case eval harness.
04 · 2026Lead Engineer
Built a multi-tenant restaurant CMS on Wagtail and Next.js that serves 200+ websites, each with its own domain, theme and editors, from one deployment.
05 · 2026Designer and main maintainer
A team Claude Code setup for a multi-tenant Django SaaS. Eight scoped subagents plan, build and review; hooks block risky commands and gate every turn.
What I do
If it moves money, lets people in, or has to stay in sync with five other systems, it's probably mine.
One codebase, strictly isolated tenants: 20+ companies on RealHRSoft, 200+ restaurant websites on one CMS.
Recurring billing, invoicing, credits and dunning that charge the right amount on the right day.
OAuth2 and SSO services. I traced six concurrency bugs that took login errors from 15% to under 0.5%.
Queues that sync 100K+ events a day to HubSpot, Mixpanel, Intercom and Planhat without dropping data.
A PHP monolith to Python microservices in six months: 3× deploy frequency, 35% lower infra cost.
A Gemini assistant with 68 permission-checked tools and an 86-case eval harness, built with scoped Claude Code subagents and hooks.
Experience
I started as an intern in 2019. Since then: analytics, HR and restaurant software, and a team of my own along the way.
Sep 2023 – Present
Led the move from a PHP monolith to Python microservices in six months, tripling deployment frequency and cutting infrastructure costs by 35%. Designed the subscription and billing system, and fixed concurrency bugs in the auth service that were failing 15% of logins.
Nov 2020 – Sep 2023
Built payroll, leave, attendance and appraisal features for RealHRSoft, a multi-tenant HR suite used by 20+ companies. Led a team of six to seven developers and mentored three engineers from intern to mid-level.
Nov 2019 – Mar 2020
Intensive training in web development, software architecture and agile practices on real-world projects.
Writing
Things I learned the hard way, written down so I don't have to learn them twice.
A short Claude Code PreToolUse hook that stops an AI agent from force-pushing over shared git history, and why such rules belong in hooks, not prompts.
Contact
I'm taking on contract work. Billing, logins, integrations, a migration you can't afford to get wrong, or an AI feature you're nervous about shipping: that's the work I enjoy most.
Or copy the address: mail@aashishstha.com.np
A few lines is plenty
You don't need a brief or a deck. It helps if you mention:
Talk soon, AashishKathmandu · UTC+5:45
