Hiring a solo AI platform engineer vs an agency vs a freelance marketplace
If you need a production AI system - RAG, multi-agent, MCP, the infrastructure underneath - you have three rough options. Here is an honest comparison of how each plays out, from someone who is the first option.
The three models at a glance
Who actually writes the code
- Solo platform engineer (this)
- The person you talk to
- Agency / consultancy
- A team you may not meet
- Freelance marketplace
- Whoever bids
Accountability
- Solo platform engineer (this)
- One name, end to end
- Agency / consultancy
- Account manager, then a team
- Freelance marketplace
- Diffuse, per-gig
AI / infra depth
- Solo platform engineer (this)
- Specialist: RAG, agents, MCP, infra
- Agency / consultancy
- Varies by bench
- Freelance marketplace
- Varies wildly
Ramp-up
- Solo platform engineer (this)
- Immediate, no handoff
- Agency / consultancy
- Onboarding + SOW cycle
- Freelance marketplace
- Re-explain each hire
End-to-end ownership
- Solo platform engineer (this)
- Design, build, ship, operate
- Agency / consultancy
- Often build-only
- Freelance marketplace
- Usually task-scoped
Proof of work
- Solo platform engineer (this)
- Public OSS + live agent surface
- Agency / consultancy
- Case studies (often NDA'd)
- Freelance marketplace
- Reviews / ratings
Pricing
- Solo platform engineer (this)
- Contact for a quote
- Agency / consultancy
- Tiered, overhead-loaded
- Freelance marketplace
- Bid-driven
| Dimension | Solo platform engineer (this) | Agency / consultancy | Freelance marketplace |
|---|---|---|---|
| Who actually writes the code | The person you talk to | A team you may not meet | Whoever bids |
| Accountability | One name, end to end | Account manager, then a team | Diffuse, per-gig |
| AI / infra depth | Specialist: RAG, agents, MCP, infra | Varies by bench | Varies wildly |
| Ramp-up | Immediate, no handoff | Onboarding + SOW cycle | Re-explain each hire |
| End-to-end ownership | Design, build, ship, operate | Often build-only | Usually task-scoped |
| Proof of work | Public OSS + live agent surface | Case studies (often NDA'd) | Reviews / ratings |
| Pricing | Contact for a quote | Tiered, overhead-loaded | Bid-driven |
When the solo engineer is the right call
- You want one accountable person, not a relay. The engineer who scopes it is the engineer who ships it and operates it.
- The work is AI-platform-shaped. RAG pipelines, multi-agent architectures (for example a LangGraph trading analyst), MCP servers, and the backend and infrastructure to run them, built solo in production.
- You value verifiable proof. The work is public: OrchestKit (open-source Claude Code framework - 106 skills, 36 agents, 171 hooks) and a live, agent-readable surface you can
curlright now.
When an agency or marketplace fits better
- Agency: you need a large parallel team, 24/7 staffing, or a brand-name vendor for procurement.
- Marketplace: you have many small, well-specified, independent tasks and want to spread them across hands.
How engagement works
A free 15-minute intro call to scope fit, then Build and Advise tracks. No published pricing, every engagement is quoted to the actual work.
See the work, then talk: browse the projects, read the developer docs, or compare OrchestKit vs an ad-hoc Claude Code setup.
Want this outcome for your product?
A free 15-minute intro call. No pitch deck, no pressure. Just whether I can help.