US-based engineering consultancy of [Selby Baidjnath](https://serubii.com)

# When your project can’t afford an engineering mistake.

[Book a call](https://calendar.app.google/9vWsyp85euEqGMVq7) · [Email instead](mailto:selby@serubii.co)

10+ yrs

shipping production software

6+ yrs

leading engineering teams

2 exits

startups taken to acquisition

100k+

users on systems I’ve shipped

## Work

### Augtal

CTO

AI recruiting platform, first commit to acquisition. Quantized inference, Kubernetes, security ops, and the engineering team.

TypeScript, Python, Kubernetes, pgvector

### Plasma

Engineering lead

Led and built the cryptographic SDKs, ported from Scala to five languages with exact parity. Owned the mobile wallet product.

Rust, TypeScript, Kotlin, Java, Dart, Flutter

### IT Partner

Lead developer

Logistics apps used across major European ports, migrated from Windows Mobile to Flutter with zero downtime.

Flutter, C#, Azure, Firebase

### Architecture and production systems

Distributed systems, Kubernetes, PostgreSQL, CI/CD

### Applied AI and inference

RAG, pgvector, vLLM, llama.cpp, quantization

### Zero-downtime migrations

Legacy .NET and mobile, data backfills, cutovers

### Multi-language SDKs

Rust, Go, TypeScript, Kotlin, Dart, WebAssembly

## Engagements

### System rescue

1–4 weeks

Fix a slow, flaky, or failing system.

### Delivery sprint

4–12 weeks

Ship a defined, high-risk piece of work.

### Fractional CTO

Monthly

Technical leadership without a full-time hire.

## Hands-on, solo or with a small team

I still write the code. When the scope calls for it, I bring in a small team of senior engineers. One contract, one contact: me.

Backend, frontend, mobile, ML, DevOps, design, QA.

More on [my engineering background](https://serubii.com).

-   ### Solo
    
    I architect it and write the code.
    
-   ### Small team
    
    Me plus senior engineers I work with, for a bigger build.
    

## Ventures

Building products from zero to one, in the USA and Suriname.

![Borderless](/_astro/borderless.CwggzIZB.svg)

### [Borderless](https://borderlessnv.com)

Suriname based studio that designs and implements software, BPA, and AI workflows that help teams move faster.

[borderlessnv.com](https://borderlessnv.com)

### Serubii

USA based software engineering and consulting firm that builds custom software for businesses.

![](/_astro/serubii.B8eYN8id.svg)

## Tell me what you’re building.

[Book a call](https://calendar.app.google/9vWsyp85euEqGMVq7) · [selby@serubii.co](mailto:selby@serubii.co)