Customer-Facing Fintech Apps
Calculators, quote and application flows, document generators. Form in, PDF out, paid.
Like Paystub HeroFintech software, built in weeks.
Custom web apps, client portals and SaaS for fintech and financial firms. Fixed price, live in weeks, and you own every line of code. We built the paystub generator behind Paystub Hero.
- Fixed price, no hourly billing
- Code and accounts in your name
- Half to start, half when you approve
★★★★★
4.9 from 350+ client reviews · Since 2016
4.9 from 350+ client reviews · Since 2016
Trusted by founders and financial brands
Three Bad Options.
You have the idea and the customers. Then you ask for a quote. A US dev shop wants $60,000 to $120,000 and six months, billed by the hour. An in-house engineer takes three months to hire and $150,000 a year to keep. A freelancer marketplace is a coin toss. So the product stays a spreadsheet, and the customers stay someone else’s.
What We Build.
Software for money, documents and clients. If it has a form, a calculation, a document or a dashboard in it, we have built it before.
Client Portals
For advisors, CPA and tax firms: secure uploads, e-signature, status tracking and messages, so clients stop emailing PDFs.
Analysis And Reporting Tools
Upload the financials, parse the numbers, benchmark them, and export a report your client or lender can read.
Like Practice ScopeInternal Tools And Dashboards
The spreadsheet your team runs on, turned into software with roles, approvals and an audit trail.
SaaS Products With Billing
Accounts, plans, subscriptions, usage limits and an admin panel. Payments from day one.
Integrations And Automation
Connect your accounting, CRM, e-signature and payment tools. Replace the copy and paste.
From Brief To Live In Weeks.
Here is exactly what happens, and where you come in. You approve a clickable prototype before we write a line of code.
Phase 1 · Week 1–2
Blueprint
A one-hour call. We write the spec, draw every screen as a clickable prototype, and fix the price and the launch date in writing. Nothing gets built until you approve it.
Phase 2 · Week 3–7
Build
Weekly sprints. Every week you get a demo and a staging link. You test real screens, not slide decks, and we fix what you flag the same week.
Phase 3 · Week 8
Launch
Security checklist, testing on real devices, your data imported, and we go live on accounts in your name. You get the repository, the documentation and a handover video.
Ongoing
Care and growth
Monitoring, fixes and new features in fixed-price sprints. Or take the code and run. It is yours either way.
Start my BlueprintSimple Pricing.
Fixed prices, paid in milestones. No hourly billing, no surprises. Every build includes a clickable prototype, weekly demos and the code in your name.
Blueprint
Know exactly what you are buying. Credited to your build.
$900one-time
- One-hour discovery call
- Written spec and user flows
- Clickable prototype of every screen
- Fixed quote and launch date, in writing
- Delivered in two weeks
Love-the-prototype guarantee
Start my BlueprintMVP Build
One product, one core workflow, live in 6–8 weeks.
From$4,900one-time
- Everything in Blueprint
- One core workflow, start to finish
- User accounts and login
- Payments or subscriptions
- Admin panel
- Works on phone, tablet and desktop
- 90-day fix-it-free
All three guarantees
Book my strategy callFull Product
The MVP, plus everything a growing product needs.
From$9,900one-time
- Everything in MVP Build
- Multiple user roles and permissions
- Dashboards and reporting
- Integrations: accounting, CRM, e-signature
- API for your partners
- Automated emails and notifications
- 3-month care plan included
All three guarantees
Book my strategy callCare plan, from $490 a month. Monitoring, updates, bug fixes, small improvements and priority support. Cancel any time. Hosting, domain and every account stay in your name.
Feature sprints, from $1,900. New features after launch in two-week sprints, quoted before we start.
Why it isn’t $80,000. No office lease, no account managers, no hourly billing. A small senior team, building for US firms since 2016, on a foundation we have shipped before: accounts, payments, documents, admin. You pay for what is unique to your product, not the plumbing.
Half to start, half when you approve the finished build. Don’t love the prototype after two rounds? Your deposit comes back.
| Blueprint | MVP Build | Full Product | |
|---|---|---|---|
| Clickable prototype of every screen | ✓ | ✓ | ✓ |
| Fixed quote and launch date in writing | ✓ | ✓ | ✓ |
| One core workflow, start to finish | — | ✓ | ✓ |
| User accounts and login | — | ✓ | ✓ |
| Payments or subscriptions | — | ✓ | ✓ |
| Admin panel | — | ✓ | ✓ |
| Works on phone, tablet and desktop | — | ✓ | ✓ |
| Weekly demos | — | ✓ | ✓ |
| 90-day fix-it-free | — | ✓ | ✓ |
| Multiple user roles | — | — | ✓ |
| Dashboards and reporting | — | — | ✓ |
| Integrations | — | — | ✓ |
| API for your partners | — | — | ✓ |
| Automated emails and notifications | — | — | ✓ |
| 3-month care plan | — | — | ✓ |
| All three guarantees | — | ✓ | ✓ |
What Would This Cost You?
Pick what your product needs. See a typical US dev shop quote next to Finnext, live.
Yours To Keep.
Your code, your accounts, your data. Nothing is held hostage. If you leave, you take everything.
Your code
- The repository lives in your GitHub from day one
- Hosting, domain, payments and every account in your name
- Standard, widely used tools, so any developer can take over
- Written documentation and a handover video at launch
- No private framework, no platform fees that grow with your users
Your data
- Encrypted in transit and at rest
- Role-based access, with two-factor sign-in for admins
- Payments run through the processor, so card numbers never touch your servers
- We store only what the product needs
- Daily backups and an audit log of who changed what
- A security sheet for your auditor or compliance officer
We are not an auditor and we do not sell certifications. We build so that yours can sign off.
Three Guarantees, In Writing.
Most dev shops get paid whether the product ships or not. We would rather earn it, and put it on paper.
Love-the-prototype
You approve a clickable prototype of every screen before we write code. If you don’t love it after two rounds, you get your deposit back.
Launch-on-date
Your launch date is in the agreement. The clock pauses only while we wait on your approvals or third-party access, and you can see the day count anytime. If we slip for any other reason, your first three months of care are free.
90-day fix-it-free
Anything that breaks in the first 90 days after launch, we fix at no charge. No ticket queue, no hourly invoice.
Full guarantee terms are in your agreement before you pay anything.
Why Not Just Build It With AI?
You can get a demo in a weekend. Paying customers need the other 90 percent. Give us an hour and get your evenings back.
A Demo Is Not A Product.
AI and no-code get you a screen that works once. Real customers bring payments, accounts, edge cases, failed uploads and support emails at 11pm. That is what we build for.
Your Evenings, Or Our Weeks.
On your own: months of prompts, plugins and fixes. With Finnext: a one-hour brief, a short demo each week, and a launch date in writing.
No-Code Has A Ceiling. Code Doesn’t.
Platform fees grow with your users, and you can’t take the app with you. We write code you own, on tools any developer can maintain.
Software We’ve Shipped.
Finance and fintech only. Each one built to take money, make documents or make a decision.
See all work
Payroll documents
Paystub Hero
A paystub generator that makes pay stubs, W-2s, 1099s and offer letters from one form. Ten templates, $8.99 a paystub, the PDF by email in minutes.
Acquisition analysis
Practice Scope
An AI tool that values a dental practice before purchase. Upload the financials and it parses 50+ fields, benchmarks 30+ metrics and writes the report. $7 a report, no subscription.
In build
In Build Now
A third financial software product is in build right now. Ask about it on your call.
Loved by founders.
4.9Average client rating
350+Client reviews
10Years in business, since 2016
Jesan is a pleasure to work with and has gone above and beyond with our graphic design and creative marketing needs. I highly recommend he and his team.Recommended on LinkedIn · Jan 2022
Jesan is a great artist, he understands how to brand your company and has a good taste in design.Recommended on LinkedIn · Aug 2021
Jesan helped me grow my business, helped me expand and pretty much grow.Video testimonial
His deep knowledge of what needs to be done with the customer in mind is not only exemplary but quite commendable! His approach to solving customer pain-points is unrivalled!Recommended on LinkedIn · Aug 2021
I am giving my highest recommendation to Jesan Rahaman in his designing skills, we have been working with him since 2018.Recommended on LinkedIn · Apr 2021
Working with Jesan was pleasant and easy. I look forward to working with Jesan more in the future!Recommended on LinkedIn · Jan 2022
In addition to superior design skills, Jesan brings a level of professionalism that is hard to match. He delivers peace of mind to clients and supervisors alike.Recommended on LinkedIn · Dec 2021
Jesan helped me rebrand my business and his creative direction was brilliant. Completely changed the way my brand was perceived.Recommended on LinkedIn · Jan 2021
I’ve worked with so many designers, but this surpasses everyone! Really great work! Fast, good and friendly! 5 stars are not enough at this point!Recommended on LinkedIn · Dec 2020
I’m very pleased by the design he produced for me and I will work with him again. What a creative mind!Recommended on LinkedIn · Aug 2021
Very dedicated and committed in doing his work. Always learn new ways of improving his delivery, delivers all the time, never complains.Recommended on LinkedIn · Jan 2021
He was quick to make a professional impression. I endeavored to use his services and very happy with the results.Recommended on LinkedIn · Dec 2020
Jesan did a great job creating art files for me. He was very responsive and paid attention to the detail that was given.Recommended on LinkedIn · Nov 2020
You Talk To Me.
I’m Jesan, the founder of Finnext. I’m an entrepreneur, not an account manager. I started freelancing at 14, and I’m the owner and co-founder of three brands I grew myself: RIGG, the #1 men’s cap brand in Bangladesh, LUMEEE and Femmenish. Every idea is tested with my own money before it touches yours.
We also built the paystub generator behind Paystub Hero. On your build, I’m on the first call, I review every demo, and I’m one message away. A small senior team builds with me.
Is This For You?
We run a limited number of builds at a time, so we’re picky. Here is how to tell if we’re a fit.
Not for you if…
- You want the cheapest bid on a freelancer marketplace
- You need a 40-person enterprise build with a 12-month procurement
- You can’t make 30 minutes a week for a demo
A perfect fit if…
- You have an idea, a spreadsheet or a manual process that is costing you hours or clients
- You want to launch in weeks and improve it with real users
- You want one person accountable, start to finish
Questions?
Still unsure? Ask us anything on your free strategy call.
You talk to me, not a sales rep.Jesan, founder
Blueprint is $900 and is credited to your build. MVP Build starts at $4,900 and Full Product at $9,900, each a fixed one-time price with no hourly billing. Half to start, half when you approve the finished build. Your exact number is fixed in writing at the end of the Blueprint, before you commit to anything bigger.
The Blueprint takes two weeks and ends with a clickable prototype, a fixed quote and a launch date. An MVP goes live six to eight weeks after that. A Full Product takes ten to fourteen. The date goes in your agreement, and the clock only pauses while we wait on you or a third party.
A small senior team led by Jesan, the founder, who is on your first call and reviews every demo. We have built for US financial firms since 2016, and we built the paystub generator software behind Paystub Hero.
Yes, all of it, from the first commit. The repository sits in your GitHub, and hosting, domain, payments and every other account are opened in your name. At launch you get written documentation and a handover video. If you ever want another developer to take over, they can, because we build on standard tools, not a private framework.
Data is encrypted in transit and at rest, access is role-based with two-factor sign-in for admins, payments run through the processor so card numbers never touch your servers, and there are daily backups and an audit log. We give your auditor or compliance officer a security sheet to review. We do not claim certifications; we build so that your compliance team can sign off.
Anything that breaks in the first 90 days is fixed free. After that you can keep us on a care plan from $490 a month for monitoring, updates and small improvements, buy new features as fixed-price sprints, or take the code and run it yourself. There is no lock-in either way.
Yes. That is what the Blueprint is for. Bring the idea, the spreadsheet you use today, or the competitor you want to beat. Two weeks later you have a spec, every screen drawn as a clickable prototype, and a fixed price. If you stop there, you still own the prototype and the spec.
Usually. We connect to accounting, CRM, e-signature and payment tools, and we can take over an existing codebase after a short review. If the old code is beyond saving, we will say so in the Blueprint and show you what a rebuild costs instead.
You keep everything that exists at that point: the code in your repository, the prototype, the documentation and the accounts, all in your name. You only pay for milestones that were delivered and approved. We would rather lose a project than hold one hostage.
Yes. Send yours, or use ours, before the first call. Nothing you share is used anywhere else, and we never list a client or a product on this site without permission.
Ready to build?
Your customers are using someone else’s product right now. Book a free 30-minute call and leave with a clear scope and a ballpark, whether you hire us or not.
- 30 minutes with Jesan, no pitch deck
- A rough scope and a ballpark price
- Fixed price, code in your name
We run a limited number of builds at a time, so every one gets senior attention.