Custom RESTful & GraphQL API Engineering
High-speed, scalable endpoints built with Node.js, Python FastAPI, or Laravel, complete with filtering, pagination, and caching.
Powering web apps and mobile applications from a unified backend.Break down data silos across your organization. We engineer high-performance REST and GraphQL APIs, integrate third-party SaaS platforms (HubSpot, Salesforce, ERPs, shipping carriers), and build secure webhooks that synchronize data in real time.
Select your technical requirement. We reply within one business day.
Prefer email? hello@aviancetechnologies.com
What we engineer
We build reliable data pipelines that eliminate manual double-entry and connect disconnected business systems.
High-speed, scalable endpoints built with Node.js, Python FastAPI, or Laravel, complete with filtering, pagination, and caching.
Powering web apps and mobile applications from a unified backend.Two-way bidirectional data synchronization connecting your website to HubSpot, Salesforce, Zoho, Klaviyo, or ActiveCampaign.
Instant lead scoring, deal creation, and customer profile enrichment.Automating real-time data flow between your website, ERP systems (SAP, NetSuite, Zoho), and accounting tools (QuickBooks, Xero).
Inventory stock reservation and automated invoice generation.Integrating live shipping rates, automated label printing, address verification, and tracking webhooks with FedEx, UPS, or Shiprocket.
Instant shipping cost calculations at checkout and automatic tracking emails.Idempotent webhook receivers and dispatchers backed by Redis queues (BullMQ/RabbitMQ) that guarantee zero dropped events under load.
Processing tens of thousands of real-time webhooks reliably without server crashes.Protecting your endpoints with API key management, JWT tokens, OAuth 2.0 workflows, IP whitelisting, and strict Redis rate limiting.
Preventing scraping, credential stuffing, and unauthorized data access.Why Aviance
Basic webhooks fail when servers restart or APIs change. We build idempotent architectures with automated retries and dead-letter queues.
Every API we build includes full OpenAPI/Swagger documentation so external developers can test endpoints with one click.
Heavy data sync operations run in background Redis queues, ensuring your front-end website remains blazingly fast.
We configure logging dashboards (Datadog / Sentry) that alert our team the moment an external third-party API changes or fails.
How an API project runs
We design endpoints, define contract schemas, code business logic, and test against edge cases before live deployment.
Defining endpoint routes, payload contracts, authentication flows, error formats, and rate limits in an OpenAPI spec.
Approved API technical specification and mock endpoints.Developing endpoints in Node.js, Python, or Laravel with database ORM models, validation rules, and caching.
Functional staging API with mock and live data feeds.Connecting third-party APIs (HubSpot, Stripe, ERPs), writing webhook event dispatchers, and setting up Redis queues.
Bidirectional data sync tested in sandbox environments.Conducting automated unit tests, rate-limit stress tests, payload fuzzing, and security vulnerability scans.
Performance benchmarks passing sub-50ms latency targets.Deploying to cloud infrastructure with automated monitoring, SSL, and delivering the interactive Swagger documentation.
Live API in production with full documentation and monitoring.Ways to start
Fixed project pricing based on endpoint count and third-party complexity. Clear deliverables and full IP transfer.
From $350
Connect your website to one major third-party platform (HubSpot, Salesforce, Shiprocket, or Google Sheets).
From $1,200
Bespoke RESTful or GraphQL API backend designed to power web apps, mobile apps, or partner platforms.
From $2,800
Complex multi-system integration connecting ERPs, legacy mainframes, payment gateways, and databases.
A recent project · Universal Fabrication
Connected a legacy on-premises ERP database to their modern web platform, automating inventory sync and live stock status across 4,000 SKUs.
Universal Fabrication suffered discrepancies between warehouse stock and website listings, requiring hours of manual daily inventory reconciliation.
We developed an event-driven microservice API that listens to warehouse ERP inventory changes and syncs stock levels to the website in sub-second time.
Eliminated manual inventory entry entirely, with over 100,000 automated stock updates executed monthly with zero errors.
Send us your technical requirements and API documentation links. We reply within one business day with an architectural concept, data flow diagram, and fixed project estimate.
Where it shows up
The stack follows the job. We use what your project actually needs.
FAQ
Pricing, delivery timelines, platforms, technical specifications, and post-launch support.
Get A Free QuoteA REST (Representational State Transfer) API uses standard HTTP methods (GET, POST, PUT, DELETE) where each endpoint returns a fixed data structure. REST is simple, universally compatible, and easily cached by CDNs. GraphQL allows the client to request precisely the data fields it needs in a single query, preventing over-fetching and eliminating multiple network roundtrips. We help you choose the right architecture based on whether you are building mobile apps, public developer platforms, or internal data syncs.
We design APIs with resilient defense-in-depth mechanisms: 1) Redis in-memory caching stores frequent query responses, delivering sub-20ms latency; 2) Redis rate limiting restricts excessive requests per IP or API key to prevent DDoS abuse; 3) Heavy operations (like email dispatch or document generation) are offloaded to asynchronous background queue workers (BullMQ/RabbitMQ); and 4) Database queries utilize indexing and connection pooling.
Yes. We frequently build secure API microservices that bridge modern web applications with on-premises legacy databases (such as older SQL Server, Oracle, or IBM DB2 systems). We configure secure VPN tunnels or IP-whitelisted reverse proxies with encrypted TLS connections to ensure your internal network remains completely protected.
Traditional polling requires your server to make continuous requests (e.g., every 5 minutes) asking "Are there any new orders?", wasting server resources and introducing delays. Webhooks are real-time and event-driven: the moment an event happens (such as a payment succeeding or a new lead submitting), the source platform instantly pushes an HTTP POST payload to your server. We build secure webhook receivers that verify HMAC signatures and process data in milliseconds.
Connecting an existing website to a third-party API (like HubSpot, Salesforce, or Shiprocket) typically ranges from $350 to $650. Developing a custom RESTful or GraphQL API backend with 10–15 endpoints, authentication, and Swagger documentation ranges from $1,200 to $2,500+. Large enterprise microservice integrations with ERP systems range from $2,800+. We provide fixed milestone quotes with zero hidden hourly fees.
A single third-party API integration typically takes between 3 to 5 business days. A complete custom REST or GraphQL API suite takes between 3 to 5 weeks from initial architecture specification to production cloud deployment. You receive access to interactive Swagger documentation and sandbox test environments throughout development.
We enforce enterprise security standards: all API endpoints require encrypted HTTPS (TLS 1.3); API keys and OAuth secrets are stored in encrypted environment variables and never committed to source code repositories; user endpoints utilize signed JSON Web Tokens (JWT) with short expiration windows; and role-based access control (RBAC) ensures users can only access their authorized data.
Yes! Every API we engineer includes interactive OpenAPI / Swagger 3.0 documentation. External developers or partner agencies can view complete endpoint descriptions, parameter types, required headers, and sample JSON payloads, as well as execute test API calls directly within their browser without writing any code.
Yes. Bidirectional synchronization ensures changes in either system automatically reflect in the other (e.g., a customer updating their address in your web portal updates Salesforce, and a status change in Salesforce updates your portal). We implement conflict resolution logic and timestamp verification to prevent data loops and ensure records remain perfectly synchronized.
We build resilient architectures with dead-letter queues and automated exponential backoff retries. If a third-party service (like Salesforce or a shipping carrier) suffers an outage, our system safely queues pending requests in Redis and automatically retries once the service recovers. We also configure automated Sentry and Slack alerts so our team is notified instantly if an upstream API changes.
Articles
In the Digital Age, the internet is our gateway to the world. Websites are the doors we walk through each day, making…
ATN
What is the difference between windows 11 home and pro Windows 11, the latest operating system from Microsoft, has taken the tech…
ATN
Are you looking for a perfect automated Video Making Software which will help you in multiple ways? We have come up with…
ATN
Send a few details. We reply within one business day with scope, timeline, and a number you can plan around.