England, United Kingdom · Europe/London
London builds, shipped right.
YAEL is registered as YOUR APP EXPERT LTD in the UK and most of our team operates on UK working hours. Our London engagements tend to be a mix of fintech and B2B SaaS — categories where the regulatory bar is higher and the engineering needs to match. We work with founders pre-seed through Series B, and with funded teams that need senior engineering capacity faster than they can hire it.
Working with London-based teams
- We invoice in GBP and handle UK VAT directly
- Working hours overlap fully with the London business day
- Familiar with FCA-adjacent compliance constraints for fintech builds
- Standard NDA + IP assignment under English law
Where we focus in London
Our most common engagement shapes for teams in this market.
Fintech
Banking infrastructure, payments products, lending platforms, embedded finance — every one of them lives or dies on the quality of its integrations and compliance posture.
SaaS
Vertical or horizontal SaaS — the back-office, the product surface, the billing, the dashboards, the integrations. Where most of our work lives.
Media & publishing
Editorial platforms, subscription paywalls, content recommendation, ad ops integration. SEO and performance dominate the engineering brief.
Marketplaces
Supply, demand, fee model, escrow, KYC, dispute flows. Marketplaces have the most operational surface area per founder of any category we build.
Edtech
Learning platforms, tutoring marketplaces, course delivery, school operations. The audience is generally non-technical and uptime is mostly a school-day thing.
Services we ship from London
SaaS Development
Production-ready SaaS platforms with auth, billing, and a real operator dashboard from day one.
AI Agent Development
Custom AI agents built on Claude, GPT, and open models — wired to your data, your tools, and your real workflows.
Automation Scripts
Custom scripts and workflow automations that quietly do hours of work in the background, every day.
Telegram Bot Development
Telegram bots that handle real users, real payments, and real moderation — not toy bots.
WhatsApp Business API
Direct Meta WhatsApp Business Cloud API integration — templated messages, two-way conversations, and Stripe-grade reliability.
Discord Bot Development
Discord bots built for production servers — slash commands, moderation, payments, and integrations that hold up at scale.
Recent production work
SaaS · Customer Support · Real-time
CloudChat
Embeddable live-chat widget + customer-support SaaS
Browser · Privacy · Consumer
okbrowse
Privacy-first browser product that blocks trackers by default
Marketplace · Community · Commerce
555 Group
Group-buying + community commerce platform
Booking · Mobility · Consumer
CARZOL
Premium car rental booking platform — Singapore
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