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Currently available for select engagements

Hire Software Developer for Fintech Startups
Senior, direct, no layers

Practical software developer help for fintech startups: onboarding, payments, and fraud checks done properly, on the systems you already run.

Direct
Working Relationship
Senior-only
Delivery
Fixed scope
Agreed Upfront
No layers
Communication
Fintech Startups — Development & Engineering

A senior software developer for fintech startups

A fintech startup is judged on trust from the first screen. Users hand over bank details, identity documents, and money, and they decide within minutes whether the product feels safe enough to keep using. At the same time the team is racing to ship: onboarding, payments, fraud checks, and support all compete for the same small engineering team, and the backlog grows faster than the headcount.

The painful pattern is familiar: a signup flow that drops good users, a payments integration that works until an edge case appears, fraud rules that either block real customers or wave through bad ones, and a support queue full of questions the product should have answered itself. Fintech buyers do not forgive a broken money moment. The work has to be correct, explainable, and auditable, not just shipped quickly.

A software developer builds and maintains the custom systems behind onboarding, payments, and fraud checks: integrations, internal tools, and product features, written to last and documented so the next developer can pick them up. The engagement is senior-only and direct: you work with Omer, the scope is agreed before build, and the work is judged on what changes in onboarding, payments, and fraud checks — not on hours logged or deliverables counted. Book a free discovery call and we will test the fit before any scope is agreed.

What you get

What this engagement covers for fintech startups

  • Custom features and integrations — The capabilities your off-the-shelf tools do not cover, built against Stripe and Plaid APIs.
  • Internal tools — Staff-facing tools for onboarding, payments, and fraud checks that replace spreadsheets and manual workarounds.
  • API design and documentation — Clean, documented APIs, so future systems and partners can connect without reverse-engineering.
  • Legacy system rescue — Untangling and modernising the system nobody wants to touch, in safe, incremental steps.
  • Testing and code quality — Automated tests for critical paths, so changes stop breaking what already works.
  • Maintenance and handover — Documentation, monitoring, and a handover standard, so the software outlives any one developer.
Systems that fintech startups actually run

Built for the stack you already pay for

Fintech products in this space are commonly built around Stripe for payments, Plaid for bank account connections, and Alloy, Socure, or Persona for identity verification and KYC checks. Product analytics usually runs on Segment or Mixpanel, support on Zendesk or Intercom, and money movement or payouts through providers such as Dwolla or Marqeta where cards or transfers are involved. Any new work has to fit that stack, handle failures and webhooks properly, and keep a clear audit trail for every money and identity decision.

Software work here is built on your existing stack — Stripe, Plaid, your CRM, and your product platform — with version control, staging, and deployment discipline as standard, not as extras.

That discipline matters because the failure mode of outside help is usually a new tool nobody maintains. Work that lives inside Stripe and your CRM survives the engagement; work that lives in a separate spreadsheet or dashboard dies the week the engagement ends. Every build here is therefore judged on whether your team can run it afterwards without the person who built it.

How it works

From kickoff to delivery for fintech startups

  1. Map the system and the pain

    Review the current tools, code, and where onboarding, payments, and fraud checks breaks today.

  2. Agree scope in slices

    Small, shippable pieces, each valuable on its own, instead of a big-bang rewrite.

  3. Build with tests

    Features delivered with tests on the critical paths and documentation as standard.

  4. Hand over properly

    Monitoring, docs, and a walkthrough, so your team is not dependent on one person.

Realistic outcomes

What success looks like, honestly

For a fintech startup, realistic outcomes are measured in the funnel and in the support queue: more started applications completed, fewer good users rejected by verification, failed payments recovered automatically, and fewer repeat questions reaching support. Those numbers come from your own analytics and payment dashboards, not from promises made before the work starts.

  • Outcome 1 — Custom capabilities your off-the-shelf tools cannot provide, built in shippable slices.
  • Outcome 2 — Internal tools that replace spreadsheets for onboarding, payments, and fraud checks, with proper access control.
  • Outcome 3 — Code your next developer can understand, because tests and documentation are part of delivery.

No prices, guarantees, or client results are promised on this page, because the honest answer depends on your starting point: the state of your systems, the quality of your data, and how much of onboarding, payments, and fraud checks is actually broken today. The discovery conversation exists to establish that baseline before any commitment is made.

Why Omer

Why hire Omer

  • Senior-only delivery: You work directly with Omer on your fintech startups engagement, not through account managers or a handover chain.
  • Built on your stack: Stripe, Plaid, and your CRM — not a parallel tool nobody maintains.
  • Measured on outcomes: Success is judged on onboarding, payments, and fraud checks improving in your own numbers, not on activity delivered.
  • No lock-in theatre: Your systems, data, and documentation are handed over in full, so you are never held hostage by one engagement.
  • Direct communication: A core overlap window agreed before kickoff, with launches and incidents covered in your business day.
FAQ

Questions, answered

What does a software developer actually do for fintech startups?
A software developer builds and maintains the custom systems behind onboarding, payments, and fraud checks: integrations, internal tools, and product features, written to last and documented so the next developer can pick them up. In practice, that means help with onboarding, payments, and fraud checks, working with founders and product leads directly.
Will this work with Stripe and Plaid?
Work is built around your existing stack. Stripe and Plaid are treated as systems of record: new work reads from them where possible and writes back cleanly, rather than creating a parallel copy of your payment and account data. Where an integration is not available or not justified, the workflow is designed so staff are not left doing double entry.
What about regulation and compliance for fintech startups?
Financial products carry real regulatory weight: KYC and AML checks, data security expectations, and disclosure rules that depend on the product and the jurisdictions it serves. Nothing on this page is financial or legal advice. Regulated claims, fee disclosures, and user-facing wording are reviewed with your counsel and compliance advisers before launch, and anything that touches customer funds is built with reconciliation and audit logs from day one.
Should we build custom software or buy a tool?
Buy when a tool covers the job well; build when the job is your differentiator or no tool fits how onboarding, payments, and fraud checks actually works. The honest answer comes from mapping the job first, not from a preference for building.
How do we start?
With a discovery conversation about the work, the systems involved, and the outcome you want measured. Scope is agreed before any build starts — book a free discovery call, email omermuneer@gmail.com, or message on WhatsApp.
Currently available for select engagements

Ready to get started?

The best way to explore working together is a quick conversation. Reach out through your preferred channel and let us discuss your project.