Fintech Software Development · London
Fintech Software Development in London
Building financial products for London fintechs, starting with the question that determines everything else: does the activity fall inside the regulatory perimeter. Holding customer money, arranging credit and executing payments are regulated activities, and the answer decides your architecture, your timeline and whether you can launch at all.
Why this comes up
The problem
The product is built, the launch date is set, and nobody has established whether the activity needs authorisation or someone else's permissions.
What you get
What we deliver
- The perimeter question settled before the architecture assumes an answer
- Customer funds segregated and reconciled if the model involves holding money
- Ledgering built properly, since a balance derived from events must be provable
- Onboarding checks designed into the flow rather than bolted alongside it
- Reporting the regulator expects produced from the system, not from exports
- A separation between your money and customers' money that survives audit
Want this scoped for your business in London?
Thirty minutes, no charge, no sales script. You leave with a written summary of what fintech software development would actually involve — whether or not you use us.
Working in London
London
London clients usually come to us because they want senior people actually on their project rather than a large agency's B team, and because Midlands rates buy considerably more delivery per pound.
Clients here are usually replacing an agency, and want senior people on the work at rates that are not Central London rates.
Sectors we work with in London
- Financial Services
- Professional Services
- Technology
- Media
- Hospitality
- Retail
What we work with
Technologies and platforms
- TypeScript
- PostgreSQL
- Amazon Web Services
- Stripe
Who we work with
Industries we serve
- Fintech startups
- Payments providers
- Lending platforms
- Wealth technology
- Financial services
Why us
Why London businesses choose Asionis
- Projects typically launched within 4–8 weeks
- No long-term contracts required
- All team members UK-based
- Dedicated account manager and development team
- Transparent reporting with monthly performance metrics
- Scalable from startup to enterprise
How we work
- Step 1
Free consultation
A 30-minute call to understand the problem. You keep the written summary either way.
- Step 2
Proposal
Scope, timeline and a fixed price, in writing, before anything starts.
- Step 3
Build
Short cycles with regular check-ins, so you see progress rather than hear about it.
- Step 4
Launch and support
We handle the go-live and stay available afterwards.
Other services in London
Looking for the full picture? See our Fintech Software Development services, everything we do in London or browse everything we do.
Fintech Software Development in London — common questions
- How do we know if we need authorisation?
- Take advice early, because the perimeter is drawn around specific activities rather than around business models. Firms frequently assume a partner's permissions cover them, or that a technology framing avoids the question, and discover otherwise close to launch.
- What does safeguarding customer funds require?
- Keeping them separate from the firm's own money, in a way that protects customers if the firm fails, with reconciliation on a defined frequency. It is an operational discipline with a system requirement behind it, not a bank account naming convention.
- Can we use an appointed representative route?
- It is a legitimate way to reach market faster under a principal's permissions, but the principal carries responsibility for you and will impose controls accordingly. Treat it as a commercial relationship with real constraints rather than a shortcut around them.
- Why build a ledger rather than store balances?
- Because a stored balance cannot be explained. When a customer disputes a figure you need to show the sequence of entries that produced it, and reconstructing that from application logs after the fact is the situation every finance team wants to avoid.
- Do you work with businesses across Greater London?
- Yes. We are based in Leicester, United Kingdom and work with clients throughout London, including London and the surrounding Greater London area. Most collaboration happens remotely, and we travel for kick-offs and key milestones.
- What kind of London businesses do you usually work with?
- Clients here are usually replacing an agency, and want senior people on the work at rates that are not Central London rates. Beyond that we work across Financial Services, Professional Services, Technology, Media, Hospitality and Retail.
- Do you cover the areas around London?
- Yes — we work throughout London, including Reading, Milton Keynes, Cambridge, Brighton. London is an urban area of roughly 9,000,000+, and we take on work across the wider Greater London region rather than the city boundary alone.
Talk to us about Fintech Software Development in London
A 30-minute call with someone who would actually work on it. No sales script, no obligation.
- Projects typically launched within 4–8 weeks
- No long-term contracts required
- All team members UK-based
- Dedicated account manager and development team
- Transparent reporting with monthly performance metrics
- Scalable from startup to enterprise