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Rounds/Specific/Founding Research Engineer·#64365
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Data·Seed·San Francisco, California

Founding Research Engineer

at Specific — Data
Location
San Francisco, California
Salary
$150,000 - $200,000
Type
Full-Time
TL;DR
  • Must already know RL/evals/post-training
  • 4% commission (~$500k TC)
  • Data-company background ideal (e.g. Handshake)
  • Build coding RL evals/tasks + RealSuite benchmark
About Specific
Specific (YC F25, $4M raised) helps AI teams get high-quality human data across voice, code, language, research, and professional domains. The company sells human-generated training data — voice recordings, audio conversations, enterprise workflow data, customer service calls, sales calls, healthcare conversations — directly to Frontier Labs (think the largest AI labs in the world). The thesis: the public corpus of internet text is exhausted. Existing data-labeling approaches (hiring random contractors) don't produce the quality needed for "AI coworker"-grade models. The next frontier of AGI will be achieved through decades of enterprise data sets that current models have never seen, plus multilingual voice data from regions where models are weak (Arabic, Indian regional languages, etc.). Specific operates a marketplace: on the supply side, partnerships with call centers, plus a proprietary network of data providers across 20+ countries who use Specific's apps (a meeting bot, a Google Meet-like talk-to-friends app) and consent to their voice being recorded in exchange for payment. On the demand side, Frontier Labs specify tight data requirements with tight deadlines. Specific is the operational layer that delivers reliably and at quality.
Seed • 1 – 10
Stage & size
Data
Industry
2025
Founded
About This Role

Specific is hiring its first SF engineer — a founding research engineer to build out the pipeline of coding RL evals and tasks. They’re mid-flight on pilots/contracts with top frontier labs and want to scale the engineering muscle in SF proactively. Day one, this person is working with customers and on RealSuite — running evals of frontier-lab models on the benchmark and on representative tasks. By ~3 months they’re building RL tasks directly with frontier labs; by ~6 months, ideally leading a team of engineers.

The profile is a research-engineering blend — with data, the key is genuinely understanding what an eval is, what a harness is, what an RL task is: real research intuition plus the engineering to build it. The hard non-negotiable: no zero-baseline candidates — they must already understand RL / coding RL / evals / benchmarks / post-training (they won’t teach that from scratch). The second non-negotiable: young, high-energy, hungry — the two traits that worked for their India team were (a) prior data-company experience and (b) being extremely hungry, wanting to do and learn as much as possible. The ideal hire comes from another data company; absent that, clear self-driven evidence of understanding post-training counts (a personal benchmark, a side project, a post-training/quant experiment). Culture is the tiebreaker: very high agency, works really hard, earnest, high integrity, wants to learn — they’d be the 5th person in the office.

What You’ll Work On

  • Build coding RL evals/tasks and the pipeline of task creation
  • Work on RealSuite — evaluate frontier-lab models on the benchmark and representative tasks
  • Build RL tasks directly with frontier labs (by ~month 3)
  • Work with customers (labs) from day one; quality-control and deliver to spec
  • Grow into leading an engineering team (~month 6)

Requirements

  • Already understands RL / coding RL / evals / harnesses / benchmarks / post-training — no zero-baseline candidates
  • Research-engineering blend: real research intuition plus the engineering to build tasks/evals
  • Ideal: prior experience at a data company; absent that, concrete self-driven evidence (a built benchmark, a post-training/quant side project)

Background

  • Target data/RL companies: Handshake (Janak hears many want to leave), Prime Intellect, Mercor, Trajectory, Bespoke, “AptQuery,” and similar
  • Bonus: research at a strong lab/school (Scale-adjacent, Berkeley, etc.); wants to start a company someday
  • Strong signal: talent from outside the SF/CA ecosystem who’s deeply curious about AI/RL/post-training and wants to come to SF (their best hire came from New York)

Location and Visa

  • A hungry, high-agency research engineer who already lives in RL/evals/post-training and wants to build the task pipeline for frontier labs
  • Someone from a data/RL company (or with self-built benchmark/post-training evidence) ready to own it as the 5th person in the room
  • Earnest, high-integrity, here-to-learn — not chasing quick cash
  • Energized by huge upside (4% project commission → ~$500k) and a fast path to leading a team
Job Details
Experience
1-5 Years
Salary
$150,000 - $200,000
Equity
0.25% - 0.5%
Visa Sponsorship
Limited
Employment Type
Full-Time
Work Arrangement
In office
Work Intensity
9-9-6
Benefits & Perks
Free Lunch
Health Insurance
Green Flags
From Handshake / Prime Intellect / Mercor etc
Built a personal benchmark, ran a post-training or quant experiment, relevant side projects
Research at a strong lab/school; wants to start a company
Red Flags
Zero-baseline on RL/evals/post-training (auto-fail — they won’t teach from scratch)
Pure research with no build ability, or pure engineer with no eval/RL intuition
Here for quick cash / low integrity / not earnest

Candidate scorecard

· 4 criteria
Already understands RL / coding RL / evals / harnesses / benchmarks / post-training (hard non-negotiable)
Research intuition + engineering to build tasks/evals
Data-company experience (or self-built benchmark/post-training evidence)
Rounds · Confidential to recruiting partners · Last refreshed Oct 9, 2026