Park23Book a call

We build AI products that launch, and rescue the ones that won’t.

Park23 builds custom web and mobile software and AI products from scratch, adds AI to the products you already run, automates the work your team does by hand, and turns stuck Lovable, Replit, v0, Bolt and Cursor apps into real products. Every project is led by founder Virgil Nilson, one of the top-ranked AI developers in the world.

Book a free strategy call Send us your project

You talk to the engineer who builds it. No account managers, no hand-offs.

  • Supermarket
  • Polyoptions
  • Signa
  • Explainr

Where are you starting?

Supermarket

A prediction market platform, built by a team we led.

Supermarket lets anyone create a market on any topic and trade on the outcome. We led the small team of engineers that built it: AI-generated market images, video and settlement criteria, live sports, politics and economic data feeds, payments, and a custom matching engine.

Read the case study
Supermarket screenshot

“Virgil is an exceptional developer with multi-disciplinary, full stack capabilities. He is highly communicative, clearly sets then meets or exceeds expectations, and serves as a very effective team leader/project manager… He consistently produced lovely, well-functioning front end interfaces and reliable, robust back ends, across a broad range of technologies.

Recommended without reservation.”

Flip P.Founder of American Civics Exchange

More shipped work

Built with AI, stuck at the last 20%?

AI builders get you a demo. Launching takes everything underneath it.

What the AI builder gave you

  • A working demo
  • Screens that look right
  • Happy-path flows

What launch needs

  • Real authentication and permissions
  • Locked-down database rules
  • Payments that handle failures
  • Background jobs
  • Reliable deploys
  • Tests and monitoring
Get a $1,499 Launch BlueprintHow vibe-code rescue works

Ways to work with us

Fixed price when the scope is clear. A monthly team when it isn’t.

  • Strategy call

    Free

    30 minutes

    A straight answer on what you need, what it should cost and the fastest path to launch.

    Book a free strategy call

  • Launch Blueprint

    $1,499

    Fixed price, 5 business days

    For AI-built apps, new AI products and automations

    Built something with Lovable, Replit, v0, Bolt or Cursor? A senior engineer reviews your code, security, payments, data and hosting and tells you what to keep, fix or rebuild. Planning a new AI product or automation? We test it on a sample of your real data and work out the models, running costs and architecture. Either way, you get a clear path to launch and a quote to get there, 100% credited toward your build.

    Get a Launch Blueprint

  • Monthly development

    $2,900+

    Per month. Cancel with 30 days’ notice

    For ongoing work and anything where the scope is still moving

    A dedicated block of senior engineering hours every month, led by Virgil, for new features, fixes and support without re-quoting every change.

    • Support20 hours$2,900/mo
    • Build40 hours$5,600/mo
    • Team80+ hoursfrom $10,500/mo
    Book a call to get started

Work directly with Virgil

Virgil Nilson, founder of Park23

Virgil Nilson is a senior AI engineer and technical lead, Top Rated Plus on Upwork with 100% Job Success and five-star reviews from founders who hired him again.

Before software, he founded and ran a 50-person company, which is why clients say he communicates like a partner, not a vendor. He leads every Park23 project personally, building hands-on or running a small team of senior engineers.

“I hired Virgil to help with a small development update and it turned into a fantastic long-term relationship. Virgil is hands-down one of the best people I’ve hired on Upwork.”

Logan D.Founder of byDesign

More about VirgilUpwork profile

How we work

  1. Scope

    We agree on what gets built, what it costs and when it ships.

  2. Build

    Milestones or a monthly plan, with regular progress updates. Problems raised early, in plain English.

  3. Launch

    We deploy, monitor and hand over. Then we stay on if you want us to.

You own all the code, accounts and IP. No lock-in.

Questions

How much does a project cost?

Two ways: a fixed price once the scope is clear, usually after a Launch Blueprint, or a monthly plan from $2,900 when it’s still moving. The Launch Blueprint fee is credited back when you build with us.

Who actually writes the code?

Virgil leads every project and writes code himself; larger builds add senior engineers he hires and manages.

Should I rescue my AI-built app or rebuild it?

Usually rescue: we keep what works and replace what won’t survive production. The Launch Blueprint gives you a clear verdict.

Do you sign NDAs?

Yes, before we see anything sensitive.

Which AI models do you work with?

OpenAI, Anthropic Claude, Google Gemini, open-source models, ElevenLabs, Replicate, Fal and more. We pick what fits your cost and quality needs.

What happens after launch?

We can stay on as your team on a monthly plan, or hand everything over with documentation.

LET’S TALK.

Book a free 30-minute strategy call with Virgil

Pick a time that suits you. You’ll get a straight answer on what you need, what it should cost and the fastest path to launch.

Send us your project

Virgil replies personally within one business day.

Book a free strategy call