Dedicated OpenAI engineering talent
Hire ChatGPT developers and OpenAI developers from Relevance Lab — for custom GPTs, OpenAI API and Assistants development, function calling, RAG and fine-tuning, on a staff-augmentation basis or as a managed pod.
Quick answerChatGPT and OpenAI developers from Relevance Lab build custom GPTs and assistants, OpenAI Responses / Assistants API integration, function and tool calling into enterprise systems, retrieval-augmented answering, fine-tuning, evaluation, and cost and latency optimisation — and can also connect OpenAI into Salesforce, ServiceNow, Microsoft 365 and internal APIs.
What ChatGPT & OpenAI developers you hire work on
Custom GPTs & assistants
Purpose-built assistants with the right instructions, tools and guardrails.
OpenAI API & function calling
Responses / Assistants APIs, structured outputs, and typed actions in your systems.
Retrieval & fine-tuning
RAG over your content, plus fine-tuning where format or cost at scale justifies it.
Cost & latency optimisation
Model routing, caching, context management — tracked as cost per request and per user.
One team for OpenAI build and integration
| Task | Covered | Notes |
|---|---|---|
| Build a custom GPT / assistant | Yes | Instructions, tools, evaluation |
| Connect OpenAI into your apps | Yes | Salesforce, ServiceNow, M365, APIs |
| Azure OpenAI Service | Yes | For tenancy / procurement needs |
| Fine-tuning | Yes | When it beats prompting on cost or format |
OpenAI talent that ramps fast
Azure OpenAI ready
For compliance or procurement constraints, with portable code.
Build and integrate
The same engineers can build the assistant and connect it into your stack.
Your process
Your repos, CI/CD, review and security from day one.
Platforms behind them
RLCatalyst and Spectra, plus a bench for spikes.
Vetted for depth
Real OpenAI engineering, not adjacent skills.
You own it
Code and configuration, in your environment.
- AWS
- DataStax
- Salesforce
- Snowflake
Prefer a fixed-scope build?
ChatGPT & OpenAI Development Services deliver a defined outcome that we own end to end.
Building with OpenAI
Governed AI coding assistants with Research Gateway & Amazon Bedrock
Secure, self-service access to AI coding assistants with institutional control over data and usage cost.
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Content last reviewed: September 2026
Scaling this across the enterprise?
Our Enterprise AI Services practice brings generative AI, agents and LLMs to production at scale — with the governance, platform and operating model to keep them reliable, compliant and cost-controlled.
Need OpenAI engineers on your team?
Share the role, stack and timeline and we will send named candidate profiles within days.
Hire ChatGPT & OpenAI Developers
Share the role, your stack and your timeline. We send named candidate profiles within days, and engineers typically start within 1–3 weeks — staff augmentation, team extension or a managed AI pod.