Miju Labs

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Co-founder and CTO of Contra; the engineering lead behind the marketplace that supplies Contra Labs. A well-known open-source JavaScript/PostgreSQL engineer (Slonik and other libraries) who blogs on engineering and, since 2026, on AI-assisted development and fine-tuning.

medium confidenceAt Contra Labs (Contra.Work Inc.) since 2019Updated 2026-09-19

Background

Unusual Ventures describes Huffman and Kuizinas as serial entrepreneurs with experience across music tech, telecom, fintech software and entertainment-data aggregation. Before Contra he was building a platform around engineering skills and code analysis, and he met Huffman through On Deck (Everywhere Ventures). His Contra profile describes a technology leader across social networks, entertainment, advertising and Wi-Fi.

What they run now

Contra platform engineering (TheOrg lists about 33 reports; unverified and possibly stale). His 2026 posts cover isolated environments for agentic development (Mar 2026) and using ablation to decide what to fine-tune (May 2026), a sign of hands-on ML work, though none mention Contra Labs. His role in Labs' data pipeline (trajectory capture tooling, arena) is not documented.

Career

  1. 2019 – presentCo-founder & CTO, Contra (Contra.Work Inc.)

On the record

Agentic development · 2026-03

Advocates isolated development environments for running coding agents safely. source

Fine-tuning · 2026-05

Uses ablation to find what a model actually needs fine-tuning on, including Blender-generated synthetic data for spatial reasoning. source

Recent posts

40 posts archived · most engaged first, then the latest

Gajus@kuizinas·
The real test for AGI is going to be if it is going to change its answer when you ask "Are you sure?"

Connections

Who they amplify

Accounts whose posts Gajus has reposted recently: Kelsey Bishop, Center for Physical Sciences and Technology (FTMC), Julius Černiauskas.

Why it matters here

Little direct relevance to taste data as a discipline. He matters as the builder of the capture and tooling layer (arena, trajectory recording) that makes Contra's supply usable, and as a likely decider on whether Contra builds modelling in-house after losing Lica.

How to reach

Publicly reachable via gajus.com (email listed), X @kuizinas, GitHub. Engineering-to-engineering topics (trajectory capture, dataset tooling) are the natural opener. Speculative.

What we could not establish
  • Current location (Contra profile says San Francisco but lists a GMT+1 working timezone)
  • Whether he has any direct role in Contra Labs
  • Education and pre-Contra employers

Sources

  1. gajus.com
  2. Contra profile: Gajus Kuizinas
  3. Unusual Ventures: Contra's unusual journey (Jun 2021)
  4. Everywhere Ventures: Founders Everywhere — Ben Huffman (Apr 2026)
  5. TheOrg: Contra org chart