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Saptarshi Joshi

Projects

Things I built because I needed them.

Research tooling that runs the CFD campaigns, a few side projects that ship, and earlier team work.

2026research tooling

Headless CFD design pipeline

Parametric CAD in CadQuery, headless SpaceClaim and Ansys Fluent through PyFluent, a restartable run registry, automated convergence and energy-balance gates, and a physics reduced-order model that screens tens of thousands of cold plate designs before a single mesh is built.

Python · PyFluent · CadQuery · numpy/scipy · scikit-learn · BoTorch

2026private

PortfolioAI

A personal investment analysis tool for a passive, long-horizon investor: data pipeline, views and an LLM advisor with hard usage caps.

Python · LLM APIs · data pipeline

2026in use

WatchTogether

Synchronized Netflix, Prime Video and YouTube watching for two people on different continents, on zero infrastructure cost. Each person plays on their own account; a Durable Object keeps the players in lockstep, with a countdown mode for TV apps that cannot be scripted.

Cloudflare Workers · Durable Objects · Preact · Chrome MV3 extension · userscripts · TypeScript

2023internship

Green hybrid dual-fuel control

At Lennox International: a control logic for heat-pump-plus-furnace systems, co-simulated in Python and EnergyPlus, that optimizes real-time cost and emissions from regional grid data. 25 % emissions reduction across six Midwest and Northeast locations.

Python · EnergyPlus · co-simulation

2023team lead

Team Rakshak UAV

Led IIT Bombay's 65-student unmanned aerial systems team across four subsystems: aerodynamic design, 250-part CAD, structural and impact analysis, manufacturing.

SolidWorks · ANSYS · composites