Map the workflow
01 / 04We document how the work happens today - who does what, where data lives, and which edge cases matter.
Custom web app development
Custom web apps, platforms, and internal tools .
Leonidovski builds custom web applications for work a template can't handle - billing platforms, learning management systems, admin dashboards, AI products, and workflow automations. We typically build with Next.js, TypeScript, and Postgres, deploy on Cloudflare or Node.js hosting, and integrate services like Stripe, OpenAI, and ElevenLabs. Custom projects start at $4,000 and are scoped around your goals and complexity.
- Starting at
- $4,000
- Timeline
- Timeline based on scope
What's included
One team for every layer of the product .
Custom software fails at the seams between layers. We design and build all of them together, so the interface, the data, and the payments agree with each other.
- 01InterfaceCustomer portals, dashboards, and admin screensNext.jsReactTypeScript
- 02Logic & APIBusiness rules, permissions, and audit logsFastifyNode.jsREST
- 03DataSchemas, migrations, and verified importsPostgresNeonD1
- 04Payments & AISubscriptions, billing, and AI featuresStripeOpenAIElevenLabs
- 05AutomationThe busywork between your tools, removedAirtableMaken8n
- 06InfrastructureDeployed, monitored, and cheap to runCloudflare WorkersNode hosting
- Starting price
- $4,000 - custom scope based on goals and complexity
- Typical stack
- Next.js, TypeScript, Postgres (Neon or Supabase), Cloudflare Workers
- Integrations
- Stripe, OpenAI, ElevenLabs, Airtable, Make, n8n, and your existing tools
- Built to last
- Auth and data layers kept independent of any one vendor, so providers can change without a rewrite
From workflow map to production .
Scope & architecture
02 / 04We define the data model, integrations, and a phased plan so the first release is useful and the next ones are predictable.
Build & test
03 / 04We build in focused iterations, covering authentication, permissions, and the edge cases that break manual processes.
Deploy & support
04 / 04We deploy, migrate existing data, and keep improving the system as your operations change.
Related work
Platforms and products we've built .
Who it's for
The businesses we build this for.
FAQ
Custom software questions, answered .
Still have a different question? Bring it to the call and we'll answer it directly.
Custom projects with Leonidovski start at $4,000. The final price depends on user roles and workflows, integrations such as payments or AI services, data migration, and what the first release needs. We scope in phases so you can launch a useful first version and expand from there.
Related services
Often combined with this service.
01
Website migration
Move between WordPress, Webflow, and Shopify, or onto Cloudflare - with redirects, verified data, and a rollback path.
Explore this service02Webflow development
Custom Webflow sites with a CMS your team can actually use - designed, built, and launched in a 4–6 week sprint.
Explore this service03Shopify development
Custom Shopify themes and rebuilds with clearer product discovery and a lower-friction path to checkout.
Explore this service
Talk to the foundersLet's find the right shape for your project.
Bring the goals, the constraints, and the messy parts. We'll turn them into a clear next move.