ZTABS builds APIs in Miami — integration infrastructure connecting international banking systems for cross-border payments, trade logistics platforms across the US-Latin America corridor, real estate transaction systems for international buyer workflows, and healthcare networks for coordinated bilingual patient care.
API development in Miami creates the integration fabric that connects the city's internationally oriented business systems — banking APIs enabling real-time cross-border payment processing between US financial institutions and Latin American banks; trade APIs coordinating shipment data across customs authorities, freight carriers, and logistics platforms spanning the Western Hemisphere; real estate APIs connecting MLS systems, international listing portals, and transaction management platforms to serve the most internationally active property market in the US; and healthcare APIs integrating disparate provider systems across South Florida's fragmented delivery network to enable coordinated bilingual patient care. Miami's API development landscape is defined by: cross-border integration requirements (Miami businesses operating across national boundaries — APIs connecting US systems with Latin American counterparts that use different data formats, authentication methods, and communication protocols. Cross-border APIs: handling currency conversion, time zone differences, language-specific data, and regulatory compliance across jurisdictions. Not domestic integration with international awareness bolted on — but integration architecture designed for multi-country operation from the foundation), financial services API demand (Miami as one of the largest international banking centres in the US — over 60 international bank branches and agencies, major wealth management operations, and the largest concentration of Latin American banking outside Latin America. Financial APIs: connecting US and Latin American banking systems for payments, trade finance, wealth management, and compliance reporting — with particular emphasis on BSA/AML compliance and OFAC screening), real-time data requirements (trade logistics, financial transactions, and healthcare operations requiring real-time API performance — a customs clearance API that takes 30 seconds to respond delays the entire entry processing workflow; a payment API with variable latency creates uncertainty in transaction processing; a healthcare scheduling API that returns stale data results in double-bookings. Miami API development: prioritising low-latency, high-reliability API performance for time-sensitive business operations), and regulatory API compliance (financial APIs governed by BSA/AML, OFAC, and Federal Reserve requirements; healthcare APIs governed by HIPAA and state health data regulations; trade APIs governed by CBP data transmission requirements and international trade regulations; real estate APIs governed by RESPA, FIRPTA, and state real estate data requirements. Each API: designed with the specific compliance requirements of its domain built into authentication, authorisation, data handling, and audit logging)).
Miami's API development demand reflects the city's position as an international financial and trade hub. Financial services APIs: cross-border payment and compliance. API architectures: cross-border payment API (connecting US and Latin American banking systems for real-time payment processing — handling multi-currency transactions, exchange rate management, compliance screening, and settlement across different banking networks. Integration: connecting to ACH, Fedwire, SWIFT, and Latin American payment networks including SPEI (Mexico), PIX (Brazil), and PSE (Colombia). The API: abstracting the complexity of multi-country payment processing into a clean interface that internal applications and partner platforms can consume), trade finance API (connecting importers, exporters, and banks for letters of credit, documentary collections, and supply chain financing — the API managing document exchange, status tracking, and payment triggers across parties that may span multiple countries. Integration: bank treasury management systems, customs brokerage platforms, and ERP systems — providing real-time visibility into trade finance instrument status), compliance API (providing real-time sanctions screening, KYC verification, and transaction monitoring — the API embedded in transaction processing workflows to ensure every payment, customer relationship, and business interaction is screened against current regulatory requirements. Data sources: OFAC SDN, EU sanctions, UN Security Council lists, domestic PEP databases, and adverse media monitoring. The API: returning screening results in under 500ms to avoid transaction processing delays), and wealth management API (connecting portfolio management systems, custodial platforms, and client reporting tools — the API providing unified access to multi-currency portfolios, tax reporting across jurisdictions, and performance analytics for the international wealth management operations that Miami's banking sector specialises in)). Trade logistics APIs: supply chain connectivity. API architectures: shipment visibility API (providing end-to-end shipment tracking across carriers and modalities — the API aggregating data from ocean carrier tracking systems, air cargo management platforms, customs clearance status, and ground transportation providers into a unified visibility layer. The API: normalising data formats across carriers and providing standardised webhooks for status change notifications), customs integration API (connecting customs brokerage operations with CBP's ACE system, Latin American customs authorities, and importer/exporter ERP systems — the API managing entry preparation, filing, status tracking, and release notification. Integration complexity: each country's customs authority providing different API capabilities, data formats, and authentication methods), and carrier API gateway (abstracting the integration complexity of multiple carrier systems — ocean carriers (Maersk, MSC, CMA CGM), air cargo (LATAM Cargo, Avianca Cargo, American Airlines Cargo), and ground carriers (domestic LTL/TL and Latin American trucking) — into a unified API that logistics applications consume. The gateway: handling the authentication, rate limiting, data format, and response pattern differences across 20+ carrier APIs)). Real estate APIs: transaction and listing integration. API architectures: MLS integration API (connecting to Stellar MLS (South Florida's MLS system) and providing enriched property data — listing details, photos, price history, tax records, and market analytics. The API: going beyond raw MLS data to include AI-enriched fields like investment yield estimates, international buyer suitability scores, and comparable property analysis), international listing syndication API (distributing Miami property listings to international real estate portals — Mansion Global, Juwai (China), Rightmove International (UK), Point2 Homes (Canada), and Latin American portals. The API: translating listing descriptions, converting measurements and currencies, and managing listing lifecycle across platforms), and transaction management API (connecting all parties in a real estate transaction — agents, attorneys, title companies, lenders, and inspectors — providing transaction status, document management, deadline tracking, and communication coordination. The API: handling the additional complexity of international transactions including FIRPTA compliance, foreign national mortgage coordination, and multi-currency financial tracking)). Healthcare APIs: provider and patient integration. API architectures: health information exchange API (connecting disparate EMR systems across South Florida — the API enabling patient data sharing between Baptist Health (Epic), Jackson Health (Cerner), and independent practices (various EMRs). FHIR-based: using HL7 FHIR R4 standards for interoperability with extensions for bilingual data and South Florida-specific requirements), patient scheduling API (unified scheduling across multi-provider networks — the API querying availability across providers, locations, and specialties, with filtering for insurance acceptance, language capability, and geographic proximity. Real-time: reflecting schedule changes within 60 seconds of occurrence to prevent double-booking and stale availability), and telehealth integration API (connecting telehealth platforms with EMR systems, scheduling systems, and patient communication platforms — the API managing virtual visit scheduling, platform provisioning, clinical data exchange, and billing integration. Bilingual: supporting English and Spanish telehealth encounters with language-appropriate workflow and documentation).
Our Miami API development methodology addresses cross-border integration, security, and the performance requirements of real-time business operations. API design: contract-first development. OpenAPI specification: every API defined through OpenAPI 3.1 specifications before implementation begins — enabling parallel frontend, backend, and partner development. Versioning: semantic versioning with backward compatibility guarantees — critical for APIs used by partners and third parties who cannot upgrade simultaneously. Documentation: comprehensive API documentation generated from specifications — including bilingual documentation for APIs consumed by Latin American partners. Testing: contract testing ensuring API behaviour matches specification through every code change. Cross-border security: protecting international data flows. Authentication: OAuth 2.0 with mutual TLS for sensitive integrations — ensuring both parties in cross-border API calls are verified. Encryption: TLS 1.3 in transit, AES-256 at rest, with key management appropriate for multi-jurisdictional compliance. Rate limiting: intelligent rate limiting protecting APIs from abuse while accommodating legitimate high-volume usage patterns. Audit logging: comprehensive request/response logging for regulatory compliance — with data retention policies meeting the requirements of each applicable jurisdiction. Performance engineering: reliability at scale. Latency targets: sub-200ms P95 response times for real-time APIs — achieved through connection pooling, caching strategies, and query optimisation. Availability: 99.95%+ uptime targets with multi-region deployment — critical for APIs supporting financial transactions and healthcare operations. Circuit breakers: fault isolation preventing downstream system failures from cascading through the API infrastructure. Load testing: performance validated under 3x expected peak load before production deployment.
Financial Services / International Banking
A Miami-based international bank (specialising in US-Latin America banking — $8.4B in assets, 120,000 customers across the US, Brazil, Colombia, and Mexico) was constrained by legacy integration architecture that couldn't support modern payment products. Legacy integration: the bank's core banking system (Fiserv DNA) connected to payment networks through point-to-point integrations built over 15 years — each integration custom-coded, poorly documented, and maintained by a shrinking team of developers who understood the legacy code. Integration count: 34 point-to-point integrations connecting core banking to ACH, Fedwire, SWIFT, and Latin American payment networks. The problem: adding a new payment method or partner required 4-6 months of development because each integration was unique. Cross-border payment friction: international payments between US and Latin American accounts taking 2-3 business days and costing $25-$45 per transaction — uncompetitive with fintech alternatives that offered same-day transfers at lower cost. The bank: losing customers (particularly younger, tech-savvy clients) to Wise, Remitly, and other fintech competitors that offered faster, cheaper cross-border payments. The friction: driven by legacy integration limitations — SWIFT messages processed in batch, FX rates applied with wide spreads because of manual processing, and compliance screening adding 4-8 hours per transaction. Compliance integration: BSA/AML screening performed through a separate system with manual case management — each international transaction requiring compliance review that added processing time and labour cost. False positive rate: 8.4% of transactions flagged for manual review, with 97% of flagged transactions cleared after manual investigation — meaning compliance staff spent most of their time reviewing legitimate transactions. API demand: the bank's corporate clients requesting API access for payment initiation, balance inquiry, and transaction status — capabilities that the legacy architecture couldn't support without significant investment. Fintech partnership: two fintech companies proposing partnerships that required API integration — partnerships that would bring 15,000+ new customers but required modern API infrastructure the bank didn't have.
We built a modern API platform over 18 weeks. API gateway and core platform (weeks 1-8). API gateway: Kong-based API gateway providing authentication (OAuth 2.0), rate limiting, request routing, and analytics — the single entry point for all API consumers (internal applications, partner platforms, and future public APIs). Core banking API layer: RESTful APIs abstracting the Fiserv DNA core banking system — account management, balance inquiry, transaction history, and customer management APIs providing clean, documented interfaces to the core banking data that previously required direct database access or screen-scraping. API design: OpenAPI 3.1 specifications with comprehensive documentation — every endpoint documented with request/response examples, error codes, and integration guides. Developer portal: self-service portal for internal and partner developers — API key management, sandbox environment, documentation, and usage analytics. Payment APIs (weeks 5-14). Domestic payment API: ACH and Fedwire payment initiation, status tracking, and notification — replacing batch-processed file transfers with real-time API calls. The API: supporting individual payments and batch payment files, with webhook notifications for payment status changes. Cross-border payment API: unified API for international payments across corridors — US-Brazil (via PIX and TED), US-Colombia (via PSE and ACH Colombia), and US-Mexico (via SPEI). The API: abstracting the different payment networks into a consistent interface — the consuming application specifying amount, currency, and beneficiary, with the API routing through the optimal payment network. FX management: real-time exchange rate API with competitive rate quotes — the API providing live rates that lock for a configurable window (30 seconds to 24 hours), enabling clients and internal applications to quote and execute FX transactions without manual treasury involvement. Rate transparency: each transaction showing the mid-market rate, bank spread, and effective rate — meeting regulatory requirements for FX disclosure. Compliance API integration (weeks 8-16). Embedded compliance screening: every payment API call automatically screened against OFAC, sanctions lists, and internal risk models — screening results returned within 800ms, enabling real-time payment processing with embedded compliance. Machine learning risk scoring: AI model evaluating transaction risk based on amount, corridor, customer profile, historical patterns, and counterparty — replacing the binary flag/clear approach with a risk score that enables risk-based decision-making. Reduced false positives: from 8.4% flag rate to 3.1% — the ML model better distinguishing suspicious patterns from legitimate international banking activity. Automated clearing: low-risk transactions (82% of volume) clearing automatically without manual review — compliance staff focusing on the 3.1% of transactions that genuinely warrant investigation. Partner and fintech APIs (weeks 12-18). Partner API programme: documented, secured APIs for fintech partners — payment initiation, account verification, and KYC data sharing through standardised API interfaces. Sandbox environment: full-featured test environment enabling partners to develop and test integrations without touching production data or payment networks. Partner onboarding: from 4-6 months of custom integration development to 4-6 weeks of standardised API integration.
The API platform deployed and stabilised within 20 weeks. Payment processing: cross-border payment time: from 2-3 business days to same-day for PIX (Brazil), 4-hour for SPEI (Mexico), and next-day for Colombia. The speed improvement: making the bank competitive with fintech alternatives for the first time. Transaction cost: reduced 62% through automated processing, competitive FX rates, and eliminated manual intervention — the API platform processing transactions at $8-$12 vs. the previous $25-$45. Payment volume: international payment volume increased 78% within 12 months — driven by faster processing, lower costs, and the API access that corporate clients demanded. Compliance efficiency: false positive rate: from 8.4% to 3.1% — the ML model reducing unnecessary manual reviews by 63%. Compliance staff productivity: each compliance analyst reviewing 3.2x more genuine alerts per day (high-risk transactions requiring investigation) vs. reviewing mostly false positives. Regulatory satisfaction: the bank's next BSA/AML examination noting significant improvement in screening effectiveness and documentation. Partner and business growth: fintech partnerships: both proposed partnerships launched within 6 months — bringing 18,400 new customer accounts in year one. Corporate API adoption: 34 corporate clients using payment APIs within 12 months — processing $340M in annual payment volume through API channels. New product velocity: new payment products now launching in 4-6 weeks vs. 4-6 months — the API platform enabling rapid product iteration. Financial results: transaction cost reduction: $2.8M/year (62% cost reduction on existing volume). Revenue from volume growth: $3.4M/year (78% payment volume increase). Partner revenue: $1.2M/year (new customer revenue from fintech partnerships). New product revenue: $860K/year (revenue from API-enabled products). Total annual impact: $8.26M/year. API platform investment: $680,000. Annual platform operations: $144,000/year. First-year ROI: 1,115%.
REST and GraphQL APIs designed for clarity, performance, and developer experience.
JWT, OAuth2, API keys, and role-based access control for secure access.
OpenAPI specs, interactive docs, and client SDKs so consumers can integrate quickly.
Rate limits, versioning, and deprecation strategies for stable, scalable APIs.
Connect with Stripe, Twilio, SendGrid, and custom systems via unified API layers.
Miami's API development market includes enterprise integration vendors (MuleSoft, Apigee — offering API management platforms but requiring significant customisation for cross-border financial, trade, and healthcare use cases), fintech development shops (building payment APIs but without the regulatory compliance expertise required for licensed international banking), offshore development teams (offering lower-cost API development but lacking Miami financial services and trade industry expertise), and consulting firms (Deloitte, Accenture — offering API strategy and implementation at premium rates with limited specialisation in Miami's cross-border integration challenges). ZTABS differentiates through cross-border API expertise (APIs designed for multi-country operation — multi-currency, multi-language, multi-regulatory integration that reflects how Miami businesses actually connect across borders), financial regulatory compliance (BSA/AML, OFAC, FIRPTA, and HIPAA compliance built into API architecture — not generic security but domain-specific regulatory compliance), Miami system integration (Fiserv, Jack Henry, Stellar MLS, Epic, ACE, SWIFT, PIX, SPEI — the specific systems Miami businesses need to connect), and performance engineering (sub-200ms latency, 99.95%+ availability — the reliability standards that financial and healthcare APIs demand).
API development in Miami ranges by integration complexity and regulatory requirements. Single API integration (one system connection, standard security, 4-8 weeks): $60,000-$150,000. Multi-system API platform (3-5 integrations, compliance features, 10-16 weeks): $200,000-$500,000. Enterprise API infrastructure (full API gateway, partner programme, regulatory compliance, 14-22 weeks): $450,000-$1,000,000. Ongoing API operations and evolution: $10,000-$30,000/month.
Verified reviews from real client engagements — sourced from our public testimonial archive and Clutch profile.
My experience is throughout positive. Communication, service, the short response times and the flawless execution of a challenging topic was absolutely great. ZTABS is definitely my first choice again.
Christian Neff
Bank Software Advisory · Bank Software Advisory
Fintech
Fantastic Agency! I couldn't fault them even if I tried. They always go above and beyond to meet your expectations and always produces quality work. Thank you ZTABS.
Stephanie Kal
CEO · Beauty Finder Australia
Marketplace
It has been great working with ZTABS. They bounce off the ideas along the way. Amazing Experience.
Joel Rowe
CEO · Drill Quoter
Marketplace
We don't just contract. We ship and operate our own software. 23 products in production.
Common questions about API development for Miami businesses
Yes — we have experience integrating with PIX (Brazil), SPEI (Mexico), PSE (Colombia), and other Latin American payment networks. Our APIs abstract the different technical requirements into a consistent interface while handling the regulatory and compliance specifics of each corridor.
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