Hi, I'm Rohan.
I build ML systems and the tools around them.

• CodebloomSee any codebase bloom into a mind map, with call arrows across files. On VS Code, Open VSX and JetBrains.IDE Extension
• subpoolYour Claude, ChatGPT and Gemini subscriptions as one fast API. A single Rust binary with OpenAI, Anthropic and Gemini endpoints and a built-in dashboard.Rust
• OpenCalendlyOpen-source Calendly: share a link, take 1:1 or team bookings, synced to your calendar.Web App
• ZenPDFA clean, open-source PDF workbench with practical tools and transparent usage limits.Web App
• gogcli-plusDrive reports, local-to-Drive sync and contact deduplication on top of gogcli.CLI
• PaperloopIlya Sutskever's must-read AI papers, explored in a Minecraft-style mini world.Web App
• Pasture ImpostersAmong Us on a Pokémon-style farm: make your avatar and catch the imposter.Game
• OrbitA better Alt+Tab for Omarchy: macOS icons, Windows 7 stacks or a Windows 11 grid.Omarchy
• SolitaireFive classic solitaire games for Omarchy, offline and ad-free.Omarchy
• Anthropic performance take-homeAn optimized vector kernel for Anthropic's open performance challenge, passing correctness at 1,430 cycles.Performance
• Decensored DeepSeek R1 for VS CodeA local AI chat panel in VS Code, running DeepSeek R1-1776 or any GGUF model through Ollama.IDE Extension

Coming Next

• ZenPDF for OmarchyAn offline-first Acrobat alternative for Omarchy and Arch Linux.In Progress
• ChromarchyA local-first Photoshop alternative for Omarchy and Arch Linux.In Progress

A selection from popular projects at Google, Meta, Microsoft, OpenClaw, Grafana Labs and others. These aren't all of them: see every merged PR on GitHub.

1. meta/docusaurusMeta67k ★
   • #12054Fixed localized sites publishing wrong URLs in metadata and sitemaps.
2. aaif-goose/gooseAgentic AI Foundation56k ★
   • #12516Kept session context alive across the agent's reply lifecycle, including ACP delegation and resumes.
3. grafana/k6Grafana Labs32k ★
   • #6071Added static labels so Prometheus metrics from parallel k6 runs stay distinguishable.
   • #6070Stopped recent console logs getting lost by flushing file logs during runs.
   • #6002Added single() to grab the first matching element in k6/html.
4. pingdotgg/t3codeT331k ★
   • #12768Made desktop builds report one consistent version across the client, server and package.
   • #19923Stopped large image attachments stalling the chat timeline by decoding them asynchronously.
5. meta/lexicalMeta24k ★
   • #8539Fixed collapsible blocks breaking on empty or inline-only content.
   • #8541Added markdown round-trip tests for bold-italic text.
6. microsoft/onnxruntimeMicrosoft22k ★
   • #32846Enabled int8 and uint32 support in the CPU Where operator.
7. Unstructured-IO/unstructuredUnstructured16k ★
   • #4504Kept element IDs and source metadata intact when reloading Unstructured's own JSON output.
8. microsoft/playwright-pythonMicrosoft15k ★
   • #3084Fixed handlers with keyword-only parameters getting the wrong arguments.
9. google/osv-scannerGoogle11k ★
   • #2808Removed duplicate vulnerability queries in bulk scans, keeping result order.
10. openclaw/gogcliOpenClaw8.5k ★
    • #555Added a safe preview for finding duplicate Google Contacts.
    • #554Added read-only Drive reports: tree views, folder summaries and inspection.

1. Jun 2025 – Now

   Lead ML Engineer Altimetrik

   I own feature engineering and ML orchestration for Calibo's data and AI platform, which orchestrates workflows across tools like Databricks and Snowflake. Joined as a Senior ML Engineer and was promoted to Lead, taking on technical design, delivery and integration across ML services and data pipelines.

   Senior ML EngineerLead ML Engineer

   • Built configurable data preparation in Python, PySpark and SQL: source filtering, missing-value handling, query profiling and custom features.
   • Built reusable scikit-learn training for six classification and regression algorithms, with preprocessing, held-out evaluation and saved pipelines for inference.
   • Connected profiling and preprocessing review into LangGraph workflows behind FastAPI, validating plans and passing approved configs between stages.
   • Made every training run traceable through Databricks and MLflow: metrics, model artifacts and registration.
   • Added pytest regression coverage that catches invalid feature selections, unsupported preprocessing settings and data-handling errors.

   Python, PySpark, SQL, Databricks, Unity Catalog, MLflow, scikit-learn, LangGraph, LangChain, FastAPI, Pydantic, pytest

2. Apr 2024 – Oct 2024

   Data Scientist National Payments Corporation of India

   Led fraud detection for AePS, turning 4TB+ of raw transactions into features and predictive models that cut fraud incidents by 1.2 million. Built supervised time-series anomaly detection, and a federated fraud model for banks newly joining UPI.

3. 2022 – 2023Co-founder, own venture

   Data Scientist SkipCheckr AI

   Took an ML-powered retail self-checkout from concept to MVP with computer vision, targeted research and A/B testing.

4. Jul 2019 – Apr 2022

   Data Scientist & Software Engineer Siemens

   Fault detection on client assets from sound and sensor data, reaching 92% accuracy on remaining-useful-life classification, plus the dashboards that tracked the health of 97 assets.

Résumé as a PDF, full history on LinkedIn.

• Your First Solo AI Research PaperTen research ideas, publication routes and a reproducible project plan.Guide
• From YouTube to AnswersBuilding a RAG system over video transcripts with Whisper and LangChain.RAG
• Run Any Hugging Face GGUF Model LocallyDownloading a GGUF model and running it with Ollama on Windows.LLM
• A Time Series Analysis RoadmapOne place to learn and practise time series analysis from start to finish.Time Series