Hashlogics
Hire

Hire Claude developers

Engineers who have taken Claude past the demo and kept it running afterwards.

What you get

4 things that decide this

  1. 01Senior engineers only. Claude work fails on prompt design and evaluation judgement, which is not a junior skill.
  2. 02Production experience with the Claude API, the Agent SDK and MCP, in systems that have real users.
  3. 03You interview every engineer before they join, and you can say no.
  4. 04The team stays after launch under an agreed service level, or trains yours to take it over.
The work

What a Claude engineer actually does here

Very little of it is prompt writing. The work is deciding what the model should never be trusted to do alone, then building the structure around it. Retrieval that returns the right passage. Tool definitions the model cannot misuse. Evaluations that catch a regression before a customer does.

PremiumAudit is a working example. Claude reads insurance premium-audit documents and validates the figures, inside a workflow where a human auditor stays in the loop. On Go4Gr8 we used MCP to give a leadership coaching platform access to tools without handing it the keys to everything.

  • 01Retrieval design, so the model reads the right thing rather than more things.
  • 02Tool and MCP server design, including what the model is not allowed to call.
  • 03Evaluation harnesses, so a prompt change is a measurable event.
  • 04Cost and latency control: caching, model routing, and knowing when a smaller model is correct.

What we have shipped

Counts you can check on this site

22

case studies published, each naming the client and the stack

2

systems built on the Claude API: PremiumAudit and Go4Gr8

1

of those running MCP in production

Where this matters most

Document work

Extraction and validation from messy real documents, where the failure mode is confident nonsense rather than an error message.

Agents that act

Systems that call tools and change state. The design question is what happens when a step fails halfway, not what the prompt says.

MCP servers

Exposing your internal systems to a model with a boundary you control, rather than pasting data into a context window.

Evaluation

The part teams skip. Without it, nobody can tell whether last week's prompt change made the system worse.

What we build around the modelLive
  1. RetrieveThe right passage, measured.
  2. ConstrainTools it may and may not call.
  3. EvaluateCases from real failures.
  4. ObserveCost, latency, what it read.
  5. RecoverRollback, and a deprecation plan.

Prompt writing is the smallest part. This is the work that decides whether the system survives its first month.

A client, on camera

They will treat your vision like their own and build it that way.

Ron Klabunde · Founder, SmartREI

Your alternatives

Three ways to get Claude work done

CriterionMarketplace or freelancerAn embedded team
Who you meetA profile and a rate.The engineers, before they start. You can decline any of them.
EvidenceHours billed on the platform.Named systems in production, with the mechanism described.
When the model is deprecatedYour problem. The contract ended.An eval suite that tells you within an hour whether the swap is safe.
After launchEngagement closes.An agreed service level, or a handover with your team trained.
Where the code livesOften theirs until final payment.Your repository from day one.

How hiring works

  1. 01

    Call

    Forty-five minutes on what you are building and what has already failed. We tell you if this is not a Claude problem.

  2. 02

    Interview

    You meet the engineers who would do the work and you decide. Nobody arrives unseen.

  3. 03

    Embed

    They join your standups, your repository and your review process. Not a black box that returns a build.

  4. 04

    Stay

    An agreed service level after launch, or a handover with your team trained to run it.

What they work in

The stack

Models

Claude APIClaude Agent SDKMCPOpenAI API

Retrieval

PostgresRedisHybrid searchReranking

Runtime

FastAPINode.jsDockerAWSVercel

Quality

Eval harnessesTracingPrompt cachingRollback
Where we show up

On stage, and on the floor

[NEEDS-DATA: confirm the exact award title, awarding body and year, and add a public announcement URL. The site currently names two different bodies across three lines.]
Our booth at TechCrunch Disrupt 2025, San Francisco
Questions, answered

Common questions

01How senior are the engineers?

Senior only. The work that decides whether a Claude system survives contact with users is judgement about failure modes, retrieval quality and evaluation design. That is not something we ask a junior engineer to learn on your project.

02Do we interview them ourselves?

Yes, and we would be worried about any vendor who said otherwise. You meet the specific engineers before they start and you can decline any of them.

03Can they work with our existing team?

That is the normal arrangement. They join your repository, your standups and your review process, and your engineers review their pull requests. Embedding is more useful than a black box that returns a finished build.

04What happens after launch?

One of two things, agreed before we start. Either we stay under a defined service level, or we hand over to your team with the evaluation suite and the runbook, and train them on it. What we will not do is disappear and leave the model unmonitored.

05Do you work with OpenAI models too?

Yes. Most of our production AI work uses the OpenAI API, and several systems use both. Picking the model is an engineering decision that follows the problem, not a loyalty we bring with us.

Verified
Start

Anyone can ship the agent. We answer the pager.

We build AI agents and automation, then stay on under an agreed service level. A senior engineer reads every brief, and your call gets scheduled within 24 hours.

What happens next

  1. 01

    You send a brief or book a call

    Two minutes, whichever you prefer.

  2. 02

    A senior engineer replies within 24 hours

    Not a sales rep.

  3. 03

    Honest scoping, in writing

    And if we’re not the right fit, we say so.

Abdul Basit, CEO of Hashlogics

“I started Hashlogics because too many teams ship a demo, get paid, and disappear. We build to a standard we’d run ourselves — and we stay to keep it running.”

Abdul Basit · CEO · a direct line

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