Fractional AI Engineer by Nathaniel SullivanFractional AI Engineer by Nathaniel Sullivan
Fractional AI EngineerNathaniel Sullivan
Cover image for Fractional AI Engineer
A senior AI iOS engineer embedded with your team — without the cost or commitment of a full-time hire.
What you get:
Two days per week, dedicated to your roadmap
Senior-level technical decision making on AI integration, model selection, latency, cost
Weekly priority alignment with your team — what to ship, what to defer, what to kill
Direct App Store shipping responsibility for AI features
Async daily updates via Slack or your preferred channel
One synchronous standup per week, plus on-demand pairing as needed
Why me: I built and run Castify, an AI podcast app with 70,000+ downloads, paying users in 50+ countries, $80K+ in lifetime revenue — solo. I've also shipped Padsnap for a client. I'm not a contractor who needs to be managed; I'm an operator who ships.
Best fit: Funded teams (seed through Series A) who need to move fast on AI iOS but can't justify a $250K+ full-time senior hire yet. Most engagements last 3-6 months, with some converting to longer-term partnerships.
Terms: 3-month minimum engagement. Monthly billing in advance. Pause or end with 30 days notice after the minimum.
Price: $8,000/month flat. No hourly billing, no time tracking, no scope-creep negotiations. You get focused senior AI iOS engineering for two days a week, every week.
Starting at$8,000
Duration4 weeks
Tags
Swift
Xcode
AI Engineer
Consultant
iOS Developer
Service provided by
Nathaniel Sullivan Boston, USA
Fractional AI EngineerNathaniel Sullivan
Starting at$8,000
Duration4 weeks
Tags
Swift
Xcode
AI Engineer
Consultant
iOS Developer
Cover image for Fractional AI Engineer
A senior AI iOS engineer embedded with your team — without the cost or commitment of a full-time hire.
What you get:
Two days per week, dedicated to your roadmap
Senior-level technical decision making on AI integration, model selection, latency, cost
Weekly priority alignment with your team — what to ship, what to defer, what to kill
Direct App Store shipping responsibility for AI features
Async daily updates via Slack or your preferred channel
One synchronous standup per week, plus on-demand pairing as needed
Why me: I built and run Castify, an AI podcast app with 70,000+ downloads, paying users in 50+ countries, $80K+ in lifetime revenue — solo. I've also shipped Padsnap for a client. I'm not a contractor who needs to be managed; I'm an operator who ships.
Best fit: Funded teams (seed through Series A) who need to move fast on AI iOS but can't justify a $250K+ full-time senior hire yet. Most engagements last 3-6 months, with some converting to longer-term partnerships.
Terms: 3-month minimum engagement. Monthly billing in advance. Pause or end with 30 days notice after the minimum.
Price: $8,000/month flat. No hourly billing, no time tracking, no scope-creep negotiations. You get focused senior AI iOS engineering for two days a week, every week.
$8,000