Senior React Native developers for finance and fintech teams, based in the US
Engineers who understand audit trails, reconciliation, and access controls, and who build systems your compliance team can sign off on.
- Every engineer lives and works in the US
- Works your hours, joins your standups
- NDA and full IP assignment from day one
Book your call: tell us what you need
"NextGen scaled us from 2 to 7 dedicated engineers in under a quarter. Enterprise-grade capacity, zero agency drag."
"Their R&D tax credit workflow platform paid for itself in the first filing season."
"AI-native from day one. Our IRS transcript pipeline runs 24/7 without a human in the loop."
"Property tax appeals used to take weeks. Their comp analysis tooling turned it into hours."
"The AI intake agent handles our tier-1 patient calls with a hand-off cleaner than our old call center."
"POS, inventory, ordering — all unified. We finally have one source of truth across every location."
"The procurement platform paid for itself in the first quarter of use."
"They shipped our matching engine in 6 weeks. Our old team would've taken 6 months."
"Enterprise-grade delivery without the enterprise-agency price tag."
"Their team plugged into our sprint on day one. Zero ramp time."
"NextGen scaled us from 2 to 7 dedicated engineers in under a quarter. Enterprise-grade capacity, zero agency drag."
"Their R&D tax credit workflow platform paid for itself in the first filing season."
"AI-native from day one. Our IRS transcript pipeline runs 24/7 without a human in the loop."
"Property tax appeals used to take weeks. Their comp analysis tooling turned it into hours."
"The AI intake agent handles our tier-1 patient calls with a hand-off cleaner than our old call center."
"POS, inventory, ordering — all unified. We finally have one source of truth across every location."
"The procurement platform paid for itself in the first quarter of use."
"They shipped our matching engine in 6 weeks. Our old team would've taken 6 months."
"Enterprise-grade delivery without the enterprise-agency price tag."
"Their team plugged into our sprint on day one. Zero ramp time."
Sound familiar?
- Reconciliation and reporting still depend on manual spreadsheet steps.
- Audit and access-control requirements slow every release.
- Legacy systems hold critical numbers nobody wants to touch.
- Offshore teams struggle with the precision financial data demands.
What our React Native engineers build for finance and fintech teams
Finance systems
Ledgers, reconciliation, reporting, and integrations with full audit trails.
New mobile apps
iOS and Android from one codebase, through app store review and launch.
Stability & speed
Crashes, slow screens, and battery drain tracked down and fixed.
Comfortable inside your security controls
- We work inside your SOC 2 controls: your access policies, reviews, and change management.
- Audit trails and least-privilege access built in from the start.
- Every engineer is US-based and signs an NDA and IP assignment.
How it works
- 01
15-minute call
Tell us what you need built or fixed and where it's stuck.
- 02
Matched profiles
You meet US-based engineers with directly relevant work behind them.
- 03
You interview
Run your own technical interview. You only move forward with people you pick.
- 04
They start shipping
Onboarded into your repo, tools, and review process, with a weekly written update.
Hire US-based React Native developers for finance apps that need reliable payment flows, secure account access, and clear transaction states on iOS and Android. Projects can include banking interfaces, brokerage dashboards, and mobile payment experiences built with TypeScript, Expo, or bare React Native. Every NextGen Coding Company engineer lives and works in the US, with no offshore subcontracting.
Financial mobile work often means coordinating biometric access, Keychain or Android Keystore storage, and backend reconciliation without treating a network timeout as a failed payment. React Native 0.76’s default New Architecture also makes native SDK compatibility worth checking before an upgrade. Our senior engineers work your hours, join your standups, and are comfortable working inside your SOC 2 security controls.
Frequently asked questions
- Should a React Native finance app use Expo or a bare native project?
- Expo development builds can support native modules and are worth evaluating when your payment, identity verification, and fraud SDKs have compatible integrations. A bare project offers direct control over Xcode and Gradle configuration. Base the choice on SDK requirements, release policies, and native debugging needs rather than assuming Expo means using Expo Go.
- How should React Native apps handle payment retries and duplicate transactions?
- Payment correctness belongs on the backend, with idempotency keys and explicit transaction states. The React Native interface should distinguish pending, confirmed, and failed requests, including after an app restart. TanStack Query can manage server-state refreshes, but it should not become the source of truth for balances or settlement status.
- How do you approach authentication and sensitive data in React Native finance apps?
- Start with your identity provider, session rules, and threat model. Use platform-backed secure storage for appropriate credentials instead of AsyncStorage, and keep sensitive values out of logs and analytics events. Biometric prompts need server-side authorization behind them. We’re comfortable working inside your SOC 2 security controls; application design still needs your security team’s review.
- What should we test before upgrading a React Native banking app?
- Check native dependencies against the target React Native release, particularly identity verification, payment, biometrics, and monitoring SDKs. For a move to the New Architecture, test native module behavior as well as screens. Use physical devices and tools such as Detox or Maestro to exercise interrupted transfers, expired sessions, deep links, and background-to-foreground transitions.
- How quickly can we interview a US-based React Native finance developer?
- Most teams interview matched engineers within a week of the first call. Use the interview to explore payment state handling, native SDK integration, and release troubleshooting rather than just component syntax. We sign an NDA and full IP assignment before touching code. Book a 15-minute call to outline your finance app and hiring needs.
- Are your developers really based in the US?
- Yes. Every engineer lives and works in the United States. No offshore subcontracting and no hand-offs to another team. That's written into the contract.
- How fast can someone start?
- Most teams interview matched engineers within a week of the first call. Start dates depend on your interview process.
Related reading
- How to hire a software developer
What to check before you sign.
- Hiring test for senior engineers
How to vet senior talent fast.
- Senior engineer salary guide 2026
What the market pays.
- Onshore vs offshore vs nearshore
The honest tradeoffs.
- Forward deployed engineers
Need an owner, not just capacity?
- Resource library
Every guide and benchmark we publish.
Start your project request
Tell us what you're building — engineering capacity, AI, QA, cloud, or a fixed-scope software engagement. Our NYC team responds within one business day.
- Response within 1 business day
- 30-minute discovery conversation
- Recommended engagement model & pricing
- NYC-focused — in-person available
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