--:-- in Itanagar
Hi, I’m Roni.
Senior software engineer in Itanagar, Arunachal Pradesh. For five years I’ve been one of two engineers on a B2B user-research platform, so the app, the API, the billing and, lately, the AI agents and voice interviews are mine to build and mine to fix.
That sky is the real one over Itanagar right now, sun, stars and weather included. The first thing I ever built was a weather app, so it felt right.
Every window below works. They’re sketches of what I built and still look after at CleverX, plus one of my own.
CleverX · real-time
AI-led research interviews on LiveKit. Persona and voice come from the study config, with live transcription through AssemblyAI and Cartesia, reconnection when a participant drops, and server-side session completion.
CleverX · AI layer
Builds a whole study from one prompt. A dependency scheduler orders tool calls by what each one reads and writes, so no step references something that doesn’t exist yet. Anthropic and OpenAI, traced in Langfuse.
CleverX · real-time video
Replaced the live video layer in one coordinated release across four repositories: rooms and tokens, multi-egress recording, per-question highlight clips, observer mode and reconnects.
Open source · 2026
Answers “why does this code exist?” from git history, PR discussions and linked issues. Every claim cites a commit or comment, and it abstains when the evidence is thin. Python, Postgres + pgvector, served over MCP and REST.
Cost control
Traced a spike to low-cache-hit LLM-as-a-judge evals and fixed it with request sampling and model selection.
POST /v1/studies Authorization: Bearer { "title": "Onboarding study", "screener": "scr_9f2", "seats": 12 }
Platform
v1 study and participant endpoints, API keys with superadmin controls, a developer dashboard and published docs.
Billing
Roles, ownership transfer, observer seats that aren’t billed, Stripe autocharge and credits.
Search
Algolia to Typesense with geo indexing, and participant matching with location weighting and exclusions.
Research methods
Diaries, website tests and Figma prototype tests, graded against the researcher’s goal page. Took the Figma OAuth app through review to GA.
Reliability
Invites used to stop at 1,000 per run. Now they drain the queue, with a recovery sweep and opt-outs enforced across all 110 email templates.
I’m Nepali, born and raised in Arunachal Pradesh, and I still build from here. I care most about ownership: if I ship it, it’s mine when it breaks too. Beyond that, I don’t stress too much.
Covid had emptied the hostel, so I sat down and built a weather app. It was my first project, and it’s why this page shows Itanagar’s weather.
Finished my B.Tech in computer science and joined a B2B user-research startup as one of its two engineers. Built the design system, led the React 18 migration, moved search from Algolia to Typesense, built the screener engine and took over transactional email.
Meypato, a rental booking app. My Health Ajin, which never made it to market. Not every road goes through.
Took the platform’s AI and real-time work end to end: the study-builder agent, AI voice interviews, the Twilio to LiveKit migration, a public API, billing and multi-seat teams. Since then, email consent, invite delivery at scale and a lot of legacy code retired.
Codebase Archaeology, which explains why code exists from its git history, and Year Progress Wallpaper, which puts the year’s progress on your lock screen.
Owning the AI layer at CleverX, playing football, and taking the bike out whenever the weather allows.
Mine’s the Black Ray. Most of my travelling happens on it: a 648 cc parallel twin and whatever road the hills offer.
Keepy-uppies 0Best 0
Tap the ball to keep it up.
I play football and support Barça, win or lose. Visca el Barça.
Email is the fastest way to reach me. I work from Itanagar, and my day overlaps with European and US East Coast hours. Unless I’m out on the bike.