Why outstaff JavaScript engineers instead of hiring directly?
• Immediate access to battle-tested payment-gateway talent that understands escrow, multicurrency billing, and PCI-DSS from day one.
• Slash recruitment lead-time from months to days while avoiding agency mark-ups and HR overhead.
• Scale teams up or down on-demand, paying only for the capacity you actually use.
• Smartbrain.io handles payroll, compliance, and IP security, letting your CTO stay laser-focused on shipping features, not paperwork.
• Our continuous vetting pipeline guarantees senior-level JavaScript proficiency and domain experience, reducing ramp-up risk to near zero.
• Transparent pricing and granular time tracking keep budgets predictable and stakeholders happy.
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What Technical Leaders Say
"Our React & Node.js escrow engine went live in record time." Smartbrain’s JavaScript contractors integrated Stripe Connect, automated KYC, and cut API latency by 32 %. The augmented crew blended with our sprints, freeing my core team for roadmap features.
Erin Caldwell
CTO
GigNation Inc.
Needed Vue.js pros with payout-routing experience. Smartbrain presented three vetted engineers within 48 h; we onboarded the best in 2 days. Chargeback rate fell 18 % and compliance audits passed first try—exactly why I value their vetted JavaScript talent.
Marcus Lee
VP Engineering
SkillBridge Labs
Our monolith payments code was brittle. Smartbrain’s augmented TypeScript squad modularised the gateway, introduced Jest tests, and lifted deployment frequency by 3×. Integration felt like internal staff—stand-ups, code reviews, everything synced.
Patricia Gomez
Head of Platform
Heritage Freelance Co-op
Security was stalling our Series B. Smartbrain’s JavaScript security engineer plugged CSP, tokenised sensitive data, and helped us clear QSA review in 5 weeks. Their niche payment-gateway expertise saved at least two months.
Oliver Watkins
Security Lead
TaskHopper LLC
We feared a rewrite, but Smartbrain’s Next.js consultant bolted on FX-conversion micro-services, enabling 11 new currencies. Revenue outside US grew 27 % quarter-over-quarter with zero downtime.
Jamie Foster
Product Engineering Manager
CreatorLink Corp.
When our contractor quit mid-sprint, Smartbrain had two senior Node.js devs in Jira the next morning. They closed 47 payment-gateway bugs before code-freeze, keeping our Black Friday roadmap intact.
Dylan Brewer
Engineering Director
CraftyWork Marketplace
Industries We Empower
Gig-Work Platforms
Developers tackle escrow flows, instant payouts, and dispute automation for gig-work marketplaces. JavaScript augmentation ensures seamless integration with Stripe Connect, Adyen, or custom ledgers, accelerating feature delivery while maintaining freelancer trust and PCI compliance.
E-Learning Marketplaces
Augmented JavaScript engineers integrate multi-currency payment gateways, subscription billing, and refund logic, enabling global monetisation for online course platforms without costly platform rewrites.
Creative Services Hubs
From KYC to split payments, contractors build secure payment gateways for freelance graphic and video services, eliminating chargeback headaches and ensuring royalty accuracy.
Staffing & Recruiting
JavaScript teams add rate-card management, payroll withholding, and automated 1099 generation for staffing portals, shortening invoice cycles and boosting cash flow.
On-Demand Logistics
Developers refine real-time payment authorisation and driver payout modules, reducing settlement delays for courier and delivery apps.
Crowd-Sourcing Platforms
Augmented Node.js specialists implement micro-transaction gateways with fee aggregation, allowing cost-effective high-volume task payments.
Consulting Marketplaces
Engineers embed hourly metering and escrow into consulting portals, ensuring accurate time-tracking and timely payouts.
Game Mod Marketplaces
JavaScript devs handle in-app purchase gateways, royalty splits, and anti-fraud logic, letting creators monetise safely.
Healthcare Freelance
Specialists integrate HIPAA-aware payment flows, credential verification, and insurance billing, enabling compliant end-to-end transactions for locum staffing apps.
Freelance Platform Payment Gateway Case Studies
Rapid Escrow Engine for SkillShareX
Client: Mid-size e-learning marketplace.
Challenge: Their legacy system could not handle the growing volume of freelance platform payment gateway transactions during peak enrolments.
Solution: A two-person augmented JavaScript squad rewrote the escrow logic in TypeScript, introduced GraphQL endpoints, and linked Stripe Connect for split payments while maintaining backward compatibility.
Result: 38 % reduction in average payout latency and 0 % downtime through launch week, unlocking new international tutor revenue.
Multi-Currency Roll-Out for CraftBazaar
Client: US-based crafts marketplace.
Challenge: Shoppers abandoned carts due to single-currency restrictions in their freelance platform payment gateway.
Solution: Smartbrain supplied a senior Node.js architect and two React devs who added currency detection, real-time FX rates, and wallet support in just six sprints.
Result: 27 % revenue uplift in non-USD regions and checkout completion time cut by 19 %.
PCI-DSS Level 1 Compliance for TaskFleet
Client: On-demand logistics platform.
Challenge: Securing freelance platform payment gateway to meet investor requirements ahead of Series B.
Solution: Augmented JavaScript security expert implemented tokenisation, CSP, and automated penetration tests, working alongside internal DevOps.
Result: Passed QSA audit with zero major findings and shaved 7 weeks off the fundraising timeline.
Book a 15-Minute Call
120+ JavaScript engineers placed, 4.9/5 avg rating. Get fintech-ready talent for your freelance payment gateway in days, not months.
Our Core Services
Gateway Build-Out
End-to-end development of custom freelance platform payment gateways in Node.js, React, or Next.js. Includes escrow logic, payout scheduling, and fraud detection modules, delivered by outstaffed specialists who integrate seamlessly with your scrum rituals.
Compliance Hardening
Augmented JavaScript security experts ensure PCI-DSS, PSD2 SCA, and KYC compliance, shielding marketplaces from fines and reputational damage.
Currency Expansion
Add multi-currency and FX conversion features without rebuilding your core app. Outstaffed devs integrate open-rate APIs and localised wallets.
Performance Optimisation
Senior engineers profile Node.js services, cut cold-start times, and introduce CDN-backed asset pipelines, reducing checkout lag and boosting conversion.
Fraud Analytics
Data-oriented JavaScript teams build real-time anomaly detection dashboards, lowering chargebacks and protecting margins.
Maintenance & Support
24/7 on-call coverage, automated regression tests, and SLA-bound incident response handled by our payment-gateway veterans.
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