Hire Xero API Development Experts

Elite Xero API Development teams, ready in 48h

Why outstaff JavaScript talent for Xero API Development?

  • Slash idle time: spin-up pre-vetted engineers in days, not months.
  • Control budget: pay only for productive hours, avoid payroll tax and benefits.
  • Stay flexible: scale squads up or down with zero severance.
  • Lower risk: our specialists already solved authentication, rate-limit and webhooks for dozens of Xero integrations.
  • Protect IP: airtight NDAs and code owned by you.
  • Focus on roadmap: your core team keeps strategic features while we handle accounting edge-cases.

Outstaffing lets you tap a global pool of senior JavaScript developers who have conquered Xero’s OAuth2, payroll, and invoices modules across fintech, retail and SaaS. Instead of spending 10–12 weeks recruiting, you can launch the first pull request within 48 hours, keeping velocity high and investors happy.

Launch in 48h

Zero Hiring Fees

Pay-as-you-go

Timezone Overlap

Senior-Only Talent

Full IP Ownership

Flexible Scaling

NDAs Included

Proven Xero Know-how

Dedicated PM

Seamless Integration

Risk-Free Trial

What CTOs Say About Our Xero API Development Teams

"We replaced a 6-week hiring cycle with 48-hour onboarding." Smartbrain.io embedded a senior JavaScript engineer who already knew Xero invoices and OAuth. Our fintech team pushed the first production commit in two days, accelerating our sprint and cutting backlog by 30%.

Sarah Martinez

VP Engineering

BlueRiver Payments

Smartbrain’s JavaScript specialist mastered our POS integration, handling Xero webhooks and rate-limiting instantly. Velocity jumped 40%, QA bugs dropped, and my team finally focused on roadmap items instead of accounting plumbing.

Anthony Reed

CTO

RetailGrid Inc.

Our HR SaaS needed complex payroll sync. Smartbrain delivered a pre-vetted JS developer who nailed Xero payroll API and TypeScript hooks. Onboarding was same-day and we shipped the feature in one sprint.

Linda Shaw

Product Director

PeoplePulse HR

We were drowning in Xero reconciliation tickets. The Smartbrain augmentation model plugged in two seasoned JavaScript contractors. Within a month, ticket queue shrank 70% and support calls dropped.

Michael Bennett

Dev Team Lead

SupplyChain Logic

Hiring locally was pricey. Smartbrain provided a cost-efficient JS dev with deep Xero API experience. We cut feature cost by 32% without sacrificing code quality or coverage.

Emily Turner

CFO & Co-Founder

GreenLedger Software

Our healthcare platform required auditable Xero integrations. Smartbrain’s developer delivered typed JavaScript and unit tests that passed compliance in one go, saving 3 weeks in external audit fees.

Robert Nguyen

Compliance Engineering Manager

MediSync Health

Industries We Serve

Fintech & Payments

Fintech platforms rely on precise ledger operations. JavaScript developers augmented for Xero API Development automate invoice reconciliation, real-time FX conversions, and PCI-compliant payment posting, ensuring seamless cash-flow visibility for neo-banks and PSPs.

Retail eCommerce

Omni-channel retailers need inventory and sales synced with Xero. Our outstaffed JavaScript engineers build connectors that push order, tax and refund data via Xero webhooks, slashing manual bookkeeping and reducing stock discrepancies.

SaaS Billing

SaaS vendors demand automated subscription billing. Augmented JavaScript talent implements Xero API Development for pro-rated invoices, dunning workflows and revenue recognition rules, delivering accurate MRR reporting to the board.

Professional Services

Agencies & consultancies capture time entries in apps like Harvest then sync them. Our developers create JavaScript middle-ware that fuses project tracking with Xero timesheets and payroll, improving billable utilization.

Logistics & Supply

Logistics firms juggle high-volume invoices. Outstaffed JS specialists build batch upload and webhook-based status tracking for Xero, reducing AR days outstanding and providing ledger accuracy for freight carriers.

Healthcare Tech

Healthcare platforms require HIPAA-compliant finance flows. We embed vetted JavaScript developers who integrate claims data with Xero while encrypting PHI and meeting audit trails, easing regulatory pressure.

Hospitality

Hotel chains process multi-currency bookings. Augmented JS engineers automate invoice grouping, Xero currency conversions and nightly revenue sync, cutting reconciliation labor across properties.

Non-Profit

Non-profits must track grants distinct from donations. Our Xero API Development experts craft JavaScript scripts for fund accounting and automated reporting, ensuring compliance and transparency for donors.

Manufacturing ERP

Manufacturers bridge shop-floor ERP and Xero for cost accounting. Outstaffed devs build JavaScript adapters that sync BOM costs, work-in-progress and purchase orders, yielding real-time margin insights.

Xero API Development Case Studies

Client: Seed-stage fintech wallet.

Challenge: Reconciliation delays due to legacy micro-service lacking Xero API Development compatibility.

Solution: Smartbrain deployed 2 senior JavaScript engineers who refactored services to Node.js, implemented OAuth2, rate-limit back-off and real-time webhooks. Continuous delivery integrated with client’s GitHub Actions.

Result: 87% reduction in reconciliation latency and 0 post-deployment defects in first 90 days.

Client: Fortune 500 eCommerce brand.

Challenge: Inconsistent ledgers across APAC entities requiring Xero API Development for multi-currency invoicing.

Solution: Our augmented JavaScript squad created a TypeScript service that converts FX rates nightly, posts batch journals, and validates tax rules via Jest tests.

Result: Monthly close time dropped from 10 to 3 days and manual journal errors fell by 92%.

Client: Series-B HR platform.

Challenge: Payroll modules failed to sync leave balances, demanding custom Xero API Development.

Solution: Smartbrain supplied a pair of senior JS devs who built webhook-driven micro-services, introduced contract tests, and integrated CI pipelines.

Result: Customer churn decreased by 14%, while support tickets on payroll dropped 68%.

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120+ JavaScript engineers placed, 4.9/5 avg rating. Secure proven Xero API Development talent without the recruiting grind.

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Outstaffed Services for Xero API Development

Custom Integrations

We craft bespoke JavaScript middleware that links your core app with Xero invoices, contacts and payments. Benefit from reusable TypeScript code, faster deployment, and zero vendor lock-in while our outstaffed experts own maintenance.

Webhook Processing

Our teams set up secure Node.js listeners for Xero webhooks, providing real-time data flow into BI pipelines. Get instant visibility on AR status and reduce polling costs with highly available serverless functions.

OAuth2 Migration

Move from deprecated private keys to modern OAuth2 in weeks. Our JavaScript talents handle consent screens, token refresh, and secure storage, ensuring uninterrupted API access and audit compliance.

Reporting Dashboards

Augmented JS developers build React dashboards on top of Xero endpoints, delivering CFO-grade insights without manual CSV exports. Enjoy interactive cash-flow, P&L and cohort analytics.

Data Reconciliation

We automate three-way matching between Xero, ERP and payment gateways via Node.js jobs, reducing manual data cleansing and preventing costly ledger drift.

Support & Maintenance

Get 24/5 coverage from senior JavaScript engineers who monitor API rate limits, upgrade SDKs and patch security vulnerabilities, ensuring continuous Xero connectivity.

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FAQ: Augmented JavaScript for Xero API Development

How fast can you provide a JavaScript developer with Xero expertise?

We introduce vetted candidates within 24 hours and typically have the developer coding on your repo in 48 hours, far quicker than traditional recruitment.

Will the augmented developer work in my timezone?

Yes. We maintain at least 4 hours daily overlap with your core team to streamline stand-ups, code reviews and Xero API troubleshooting.

How do you vet Xero API Development skills?

Each engineer passes a live coding session covering OAuth flows, webhooks, rate-limit handling, plus a project review of prior Xero integrations.

Can I scale the team up or down?

Absolutely. Contracts are month-to-month, allowing you to add or release JavaScript resources as product roadmap shifts.

Who owns the intellectual property?

You do. All code, documentation and tests written by our developers are assigned to your company under the MSA and NDA.

Is there a risk-free trial?

Yes. Evaluate the developer for one week; if you’re not satisfied, you pay nothing and we’ll replace talent at no cost.

How do you handle security and compliance?

Developers work on isolated environments, follow OWASP best practices, and sign data-protection agreements to secure sensitive ledger information.

What communication tools do you use?

We adapt to your stack—Slack, Teams, Jira, GitHub—ensuring seamless collaboration and transparent sprint reporting.

Can your engineers integrate other accounting systems besides Xero?

Definitely. Most have shipped integrations with QuickBooks, NetSuite and SAP, and can architect multi-ledger abstractions in JavaScript.

What happens if my requirements change mid-engagement?

Your dedicated account manager will adjust the skill mix or headcount within days, ensuring you always have the right JavaScript expertise.