FinTech App Development Services
The future of finance runs on experiences as much as code. At Big Human, we design and build FinTech products that make complex systems feel effortless: secure where it matters, intuitive where it counts, and built to scale from day one.
From startups to established enterprises, we help teams rethink how technology drives growth. Our apps are engineered for performance and designed for people — pairing airtight architecture with seamless user experiences that build confidence with every transaction.
TD Ameritrade
Broadening the scope of innovation
FinTech App Development — An Overview
We’ve built across the FinTech spectrum, from digital banking and investing to personal finance and crypto. Every project brings its own complexity, but our mission stays the same: Create digital products that move money and move people.
We don’t just build software at Big Human; we design systems of trust. Our teams combine deep technical expertise with design intuition to tackle FinTech’s toughest challenges, from onboarding to security and scalability to usability, and turn them into seamless, human-centered experiences.
FinTech doesn’t just demand precision; it demands empathy. From trading platforms to digital wallets, every tap represents trust. Our job is to design that trust into every interaction.
When you partner with us, you get a team fluent in both design and finance. The products meet today’s standards — and anticipate tomorrow’s. Reliable, intuitive, and built to grow, our FinTech apps earn confidence one transaction at a time.
Beyond Delivery: Continuous Growth
Our FinTech app development process isn’t just about delivering code, it’s about building solutions that unlock sustained growth over time. After launch, we act as an extension of your in-house team, staying engaged to refine, optimize, and evolve your app as new opportunities, regulations, and customer behaviors emerge.
FinTech App Development Case Study
When TD Ameritrade needed to make trading feel simple without losing its depth, Big Human helped redefine what a mobile brokerage could be. Our team worked across iOS and Android to modernize their mobile experiences, ensuring the brokerage kept pace with rapidly shifting user expectations and market demands.
We designed and built thinkorswim, a powerful trading platform that brings advanced tools to users at every level. The UX was designed to feel approachable for new investors but robust enough for seasoned traders, blending usability with advanced functionality. To strengthen client relationships, we also expanded support capabilities to include live-screen sharing.
This is what we do best: Take high-stakes industries like finance and turn them into digital products people actually want to use.
What Our Clients Are Saying
"The Big Human team was amazing at helping us bring our new product to life. They helped us through our branding exercise that yielded our brand logo, style guide and messaging library as well as front end website and email style guidelines. Andrew, Maj and team were helpful, kept our group on track and on topic during the workstream meetings. I enjoyed working with the whole team and hope to do it again in the future."
Carlyn Reeves - SVP, Marketing, Triumph Financial
"Throughout the project, Big Human was communicative, adding a personal touch to our collaboration, and demonstrated a genuine care for the project's success."
Head of Design at Cryptocurrency Exchanger & Custodian
Digital Branding Services
Every touchpoint in your app is a chance to reinforce your brand, earn trust, and set yourself apart from the competition.
FinTech Branding
At Big Human, we design FinTech solutions that stand out. Our team obsessively blends visual distinction with functional innovation, creating apps that feel intuitive, attractive, and made to push the industry forward.
Financial services run on trust… but trust doesn’t have to look boring. We help FinTech brands find the balance between credibility and creativity, building identities that stand out in a sea of sameness.
Our development team thrives on tackling complex challenges. They explore new ideas, iterate relentlessly, and test rigorously until the final product delivers a seamless, high-performing FinTech experience.
From custom payment systems to wealth management, the apps we build can handle it all. We design holistic software solutions that smoothly integrate with your business model, giving you control over how you monetize your product.
Fintech Mobile App Development — Our Human-First Approach
Every app we design is built for people — your customers, your team, your business. Whether your development project involves banking, lending platforms, trading (or all three), we tailor our solutions to meet your specific business needs. By combining thoughtful brand strategy, human-centered design, and cutting-edge technology, we make apps that provide value above all else. From big-picture strategy to the smallest technical detail, every FinTech app we build follows a clear, structured development process.
Discovery
We start by getting to know your business and your users inside and out. Our designers and developers work closely with your team to understand your goals, priorities, and pain points. This ensures we target the right features and services, setting your FinTech app up for success at launch and beyond.
Product Development
Once we’ve mapped out your app’s goals, our software engineers turn concepts into a fully functioning product founded on security, performance, and scalability. From wireframes and user testing, we build in sprints tailored to your priorities, with plenty of flexibility built in for adjustments.
Security
In FinTech, trust starts with top-notch security measures. From the backend to the networks hosting your app, our team implements the latest cybersecurity protocols and features. Every layer of your app is designed to safeguard financial data in real time, protect transactions, and give you and your users supreme confidence in your platform.
QA & Post-Launch Support
Quality assurance isn’t an afterthought; it’s built into every stage of development. Our agile development process lets us test, iterate, and refine early and often — so the final product meets your expectations and satisfies your users with seamless performance. Once your app goes live, we stay involved — monitoring performance, addressing issues, and providing ongoing updates to ensure your product stays secure, reliable, and competitive.
Our Work
FinTech App Development at Big Human
We’ve worked on some of the most forward-thinking digital projects in FinTech, including Gemini, where we helped build New York’s first regulated Bitcoin exchange. Our goal was to design a brand identity that balanced trust and innovation. From visuals to voice, each element dialed in on credibility while maintaining excitement.
FinTech projects succeed when they balance features with efficiency, security, regulatory compliance (like KYC). A striking design draws eyes and maintains trust through every interaction. At Big Human, we build apps with those foundations, delivering products that meet today’s standards and set tomorrow’s.
