LITSLINK is a fintech app development company that builds fintech apps for startups, financial institutions, and product leaders across the US and Europe. We engineer payment, lending, banking, and investment products that stay secure, compliant, and scalable.
One team covers the full arc of fintech application development, from the first product workshop to post-launch support. You get end-to-end fintech app development solutions under one roadmap.
Discovery is the first step in the development process: we turn an idea into a specification, align scope to your business model and security requirements before estimating, and produce a compliance map and a budget you can defend to your board. Two to three weeks, fixed price, and you keep every deliverable even if we never write a line of code together, with the compliance map reflecting regulatory compliance for your target market.
Full-cycle custom software development for financial apps with unusual logic. Ledgers, scoring engines, settlement flows, reconciliation. We build custom solutions around your operating model instead of forcing your business into a template.
Native iOS and Android or cross-platform builds, with biometric login and safe offline handling of pending transactions. Our fintech mobile app development services cover store approval, release, and the updates that follow. Need the web side too? Our web development team ships both against one API.
Admin panels, underwriting consoles, customer portals, and account management dashboards with real-time data and role-based access, surfacing data analytics and actionable financial insights for internal teams. The unglamorous half of every financial product, done properly.
We move aging financial systems onto modern stacks without freezing the business, including upgrades to core banking platforms and adjacent banking platforms. Piece by piece, behind stable APIs, with the old system running until the new one has earned trust and improves long-term data management reliability.
Manual and automated testing plus long-term maintenance and support for fintech apps under an SLA, not just launch testing. Post-launch support also includes regular security audits and feature updates, with ongoing coverage to keep up with changing compliance requirements over time.
From single-purpose payment tools to full digital banks. If it moves money or measures risk, we have probably shipped something like it. As a financial app development company, we group the work into six product families.
Account opening, KYC onboarding, cards, and transfers. What a banking app development company owes you: a product regulators can inspect, and customers actually enjoy using.
Loan origination, automated credit scoring, disbursement, and collections. We shipped a payday lending app that funds approved loans the same day the borrower applies.
BaaS integrations, multi-currency accounts, and card programs. As a fintech mobile app development company, we build products where the app is the entire bank branch.
P2P transfers, merchant payments, and payment gateway integration with tokenized card storage across wallets and payment systems, where seamless API integrations with payment gateways and banking APIs are necessary for reliable transaction flow. The kind of work a payment app development company should sweat over, because a failed transfer is a lost customer.
Brokerage apps, crypto exchanges, investment platforms, investment management systems, and robo-advisory tools with real-time market data, including portfolio management tools for tracking assets and risk. One of ours runs on a matching engine we wrote from scratch.
Portfolio tracking, budgeting, and personal finance management with spending insights and personalized financial advice people return to weekly, not once.
Different buyers, different pressure points. Here is who we build for and what they come to us to solve.
You have runway and a deadline to prove traction. We ship an MVP with a compliance baseline built in from day one, so the next raise is about growth, not remediation.
BaaS integrations, card programs, and onboarding that clears KYC without friction. The app is the branch, so it has to work on day one.
Core system integrations, audit-ready documentation, and modernization that does not freeze the business while it happens.
You own the roadmap and need senior hands, not another vendor to manage. We plug into your process and ship against your API.
The expensive way to handle compliance is to build the product first and call the lawyers later. We work in reverse. Before the first sprint, we map which rules apply to your product and your target market, then turn that map into architecture.
Data residency decides where servers live. Audit requirements decide how events get logged. Consent rules shape the signup flow. Audit-ready documentation falls out of development as a by-product instead of arriving later as a six-figure retrofit.
Every product we ship carries the same security baseline. End-to-end encryption in transit and at rest. Tokenization for card data. Biometric authentication and multi-factor authentication on every sensitive action. Role-based access with locked balances for operations that deserve a second pair of eyes.
Then we attack our own work. OWASP-guided code review and penetration testing happen before release. Fraud prevention goes deeper than a static rules list: behavioral monitoring scores transactions in real time and routes the suspicious ones to a human. Every release is scanned and re-tested rather than signed off once. The standard we hold internally is the one we hand to the client and handover.
Modern financial products are mostly connections. Account aggregation through Plaid. Payments through Stripe, Adyen, or a direct processor relationship. KYC and AML checks through specialist vendors or a custom pipeline. Core banking through BaaS providers, plus card issuing, credit bureaus, ledgers, and accounting systems. We have wired each of these into production apps, and we design the integration layer so one vendor outage never becomes your outage. Retries, fallbacks, and reconciliation jobs that catch what webhooks miss. Our cloud and DevOps team keeps the whole thing observable.
We are also an AI development company, and fintech is where that pays off fastest. Fraud models that learn your transaction patterns instead of leaning on static rules. Credit scoring and underwriting for thin-file borrowers. Document processing that reads bank statements and IDs in seconds. Support chatbots that resolve routine account questions before a human ever sees the ticket. If a model belongs in your product, we scope it during discovery. If it does not, we say so and save you the compute bill.
Fintech app development follows a structured process we have repeated for a decade. Two-week Scrum sprints. A demo at the end of every one. CI/CD from week one, so “it works on my machine” never makes it into a status report.
Workshops, compliance mapping, specification, and budget.
Deliverable: a development roadmap you own outright.
System architecture, data model, and UX prototypes.
Deliverable: a clickable prototype plus a technical design document.
Sprint-based engineering with demos every two weeks.
Deliverable: working software, not status decks.
Functional and load testing plus a penetration test.
Deliverable: test reports an auditor can actually read.
Store submission, production deployment, and monitoring.
Deliverable: a live product with a rollback plan.
SLA-backed maintenance and a feature pipeline for version two.
Deliverable: uptime and a roadmap that survives contact with users.
Workshops, compliance mapping, specification, and budget.
Deliverable: a development roadmap you own outright.
System architecture, data model, and UX prototypes.
Deliverable: a clickable prototype plus a technical design document.
Sprint-based engineering with demos every two weeks.
Deliverable: working software, not status decks.
Functional and load testing plus a penetration test.
Deliverable: test reports an auditor can actually read.
Store submission, production deployment, and monitoring.
Deliverable: a live product with a rollback plan.
SLA-backed maintenance and a feature pipeline for version two.
Deliverable: uptime and a roadmap that survives contact with users.
We pick tools for the problem:
Node.js, Python, Ruby on Rails, or C++ where raw speed matters.
React.js and Vue.js 3. Mobile in Swift, Kotlin, React Native, and Flutter.
Rust and Solidity.
PostgreSQL, Redis, and RabbitMQ underneath, with AWS, Azure, or GCP on Kubernetes.
Three projects that show the range a fintech app development company should cover: regulated consumer lending, exchange infrastructure, and DeFi.
Challenge
SQAR Wallet promised South African borrowers something concrete: apply before 5 PM, get the money the same day. That promise had to survive NCR regulation, DebiCheck debit-order verification, and automated decisions across a 300 to 850 credit score band.
Solution
We built the app around the 5 PM cutoff. Scoring, affordability checks, and disbursement run as one automated flow, and DebiCheck verification sits inside onboarding so collections do not fail months later. Five sprints from kickoff to release.
Result
Stack
Challenge
The client wanted a cryptocurrency exchange that settles on its own forked EVM chain and handles peak order flow without renting a third-party matching engine. The MVP window was six months.
Solution
A four-person LITSLINK team wrote the order-matching engine in C++ for speed, put settlement on the forked EVM chain with Solidity contracts, and connected the services through RabbitMQ queues. Three user roles: KYC at onboarding, locked balances, and a confirmation step on every swap.
Result
Stack
Challenge
NearFinance needed a non-custodial lending and borrowing protocol on the NEAR blockchain, with a price oracle it could trust, vesting-based rewards, and Ledger hardware wallet support. Destination: mainnet, not a demo.
Solution
We wrote the smart contracts in Rust and built a custom oracle that aggregates DEX and CEX pricing, so liquidations never rest on a single data source. Rewards run on vesting schedules, and Ledger integration covers hardware-wallet users. Devnet first, then mainnet with full-cycle QA on every contract path.
Result
Stack
Plenty of fintech app development companies can produce code. Fewer keep the budget honest while the compliance work piles up. Since 2014, we have shipped software for 500+ clients, and 80+ of them were startups that used our work to raise the next round. Here is what sets the work apart.
Project management sits in the US, engineering in Europe. Your morning standup happens in your morning, and someone is always awake when production needs attention.
IP, source code, designs, and documentation transfer to you from day one, spelled out in plain-English contract terms.
We remove the rework that eats most schedules before the first sprint. Fewer surprises, fewer change orders.
Regulated-market experience means KYC, AML, PCI DSS, and SOC 2 shape the architecture instead of arriving as a post-launch retrofit.
We take fintech product development from idea to launch and stay for version two, because we expect to be judged on the next release.
A standing product team of engineers, QA, and a PM that works only on your product. Best when the roadmap runs past six months, and the requirements keep evolving.
Hire fintech developers into your existing squad within one to two weeks. Best when you already have technical leadership and need senior hands, not another manager.
We take a scoped product from specification to launch under our own management. Best for a first version with a fixed budget and a hard date.
Most agencies make you sit through three calls before anyone says a number. Here are ours. The exact quote depends on scope, integrations, and regulatory load, but these ranges hold for most of the work we take on.
$40,000 to $75,000
3 to 4 months
Best for: funded fintech startups validating one core fintech flow with a compliance baseline built in from the start.
$60,000 to $150,000
4 to 7 months
Best for: scaling products, adding integrations, new user roles, and SOC 2 readiness ahead of enterprise deals.
from $125,000
6+ months
Best for: banks and traditional financial institutions with core system integrations, heavy transaction volume, and full audit requirements.
What moves the fintech app development cost most: the number of third-party integrations, the regulatory scope, and any custom scoring or matching logic. Discovery pins the number down before you commit to the build.
LITSLINK is recognized across leading industry platforms for delivering fintech software that holds up in production and in audits. The ratings below come from verified client reviews, most written by founders and product leaders we still work with today. See what they say about building with us.
An MVP typically lands between $60,000 and $120,000. Growth-stage builds run $120,000 to $250,000, and enterprise platforms start at $250,000. Integrations and regulatory scope drive the spread.
A focused MVP ships in about 12 weeks. A crypto exchange with its own matching engine took us six months. Discovery gives you a dated plan, not a shrug.
We start with discovery, map the compliance rules to architecture, then build in two-week sprints with a demo at the end of each one. QA and a penetration test come before launch, and support continues under an SLA afterward.
You do. Source code, designs, and documentation transfer to you from day one, and the contract states it without lawyer-only language.
They enter the project at discovery, where we map every applicable rule to a concrete architecture decision. Compliance built this way costs a fraction of a post-launch retrofit.
Yes. Through staff augmentation, you can hire fintech app developers into your squad within one to two weeks, under your process and your tools.
Tell us what you are building and what is in the way. You get a 30-minute call with someone who has shipped fintech software, a straight read on scope and risk, and a real estimate. No templated reply, and no sales funnel to climb.
Next steps
LITSLINK specialist reviews your request and contacts you to discuss the details
If needed, we sign an NDA before moving forward
We send a project proposal – estimates, timeline, and team CVs included
After launch, we stay on for any updates your product needs
Thank you! Your request has been sent — our team will get back to you within 48 hours.
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