SAI RAHUL
Open to AI engineering roles
AI engineer / model builder · Bengaluru / India

I make complex AI systems feel simple.

I fine-tune language models, build AI agents and customize large or small open models for specialized workflows and classifier use cases. My 8+ years of backend experience helps me take model work all the way to production.

8+years in early-stage teams
5×throughput on same resources
2.5krequests / second
140K+AI audience on X
Selected experience

Production depth, not promises.

Backend systems I’ve owned end to end, the foundation for shipping serious model work.

02 / Pixxel

Making satellite data orderable.

Architected the end-to-end ordering platform powering a core revenue path, across 5 teams and 5+ services.

Domain-Driven Design migrationPlatform-wide IAM90% Go test coverage
Go · PostgreSQL · Frontier IAM
03 / Wakao

Video infrastructure from zero.

As the first employee, designed the backend, processing pipeline and social primitives for a video platform.

MediaConvert pipelineEvent-driven social featuresNear-real-time rankings
Go · AWS · Redis · DynamoDB · SQS
04 / Gifskey

5× more capacity on the same resources.

Migrated a high-traffic backend from PHP to Go and rebuilt the search path around better data and caching decisions.

500 → 2,500 req/secSearch: 1,000ms → 200msTop queries: 50ms
Go · SQL · Nginx · AWS · Caching
05 / Wysh

Product backend, payments and cloud from scratch.

Built the foundation for a commerce product, including unified payment gateways, dynamic pricing and messaging.

4 payment gatewaysDynamic pricing engineBulk messaging tools
Go · Razorpay · Stripe · PayPal · AWS
AI engineering

Model work in public.

Model customization, fine-tuning and agents, grounded in production engineering.

Model layer

Models tuned for the job. Agents built to move.

I fine-tune large and small open models, customize language models, and build specialized or classifier models for focused workflows.

Talk about an AI system
X / @sairahul1

Building with AI. Sharing what’s wild, practical and next.

140K+ people follow along for notes on agentic workflows, indie products and the changing shape of software work.

Open X profile
0→1 ownership

I build the first version and the system behind it.

I’ve been the first engineer at a startup, owning backend foundations from architecture through launch, and the product decisions around them.

Talk about an early-stage role
Working style

Clear experiments. Measured models. Useful defaults.

I like difficult model and backend problems, tight evaluation loops and teams that care about the user on the other side of the system.

Talk about a problem
Contact

Building the model layer?

If you’re looking for an AI engineer who can work from model customization through production, and bring deep backend experience to the system, I’d like to hear about the problem.

Experience

Experience details