We connect
that power your business.
Seamless third-party API integrations that extend your platform’s capabilities. Payment gateways, CRMs, automation tools — connected securely and reliably.
Trusted by teams automating at scale
Integration Pipeline
Secure, Reliable, Production-Ready
Every integration follows our proven pipeline: requirements analyzed, authentication configured, endpoints tested, and monitoring set up before going live.
Who is it for?
API integration solutions for every stage of growth
Whether you're connecting your first payment gateway or orchestrating complex multi-system workflows, we build integrations that scale with your business.
Startups
Ship faster with pre-built integrations. We connect payment gateways, auth providers, and essential third-party services so you can focus on building your core product instead of reinventing the wheel.
Small and Medium-sized Enterprises
Streamline operations by connecting your CRMs, ERPs, and marketing tools. We build reliable integrations that eliminate manual data entry, reduce errors, and give your team a single source of truth.
Enterprises
Architect complex multi-system workflows at scale. We design and implement enterprise integration strategies with API gateways, event-driven architectures, and comprehensive monitoring for mission-critical operations.
WHAT WE DO
Popular API solutions we integrate
Payment Gateways
Integrate popular payment gateways like PayPal, Stripe, or Braintree to enable secure and convenient online transactions.
CRMs and Ticketing Systems
Integrate CRMs and ticketing systems like Zoho, Salesforce, HubSpot, or Zendesk to streamline customer data management and support processes.
Workflow Automation Tools
Integrate workflow automation tools like Zapier to automate tasks and streamline processes.
E-commerce APIs
Integrate e-commerce APIs to provide a seamless shopping experience for your customers. This can include inventory management, order processing, and product search capabilities.
Chat System APIs
Integrate chat systems like LiveChat, Intercom, or Zendesk Chat to improve customer communication and support.
Travel & Booking Integrations
Integrate APIs from popular travel and booking services to provide real-time availability and booking options for your customers.
Analytics & Marketing APIs
Integrate analytics platforms, marketing automation tools, and tracking systems to gain deeper insights into user behavior and campaign performance across all your digital touchpoints.
Custom API Development
When off-the-shelf APIs don't meet your needs, we design and build custom RESTful and GraphQL APIs with comprehensive documentation, versioning, and authentication for your platform.
Our Process
From requirements to seamless integration
Our structured API integration process ensures reliable, secure, and well-documented integrations. Click each phase to learn more.
Project Kickoff
Phase 1 of 5
Initial meeting, requirements gathering, and team alignment. We define project scope, set expectations, and establish communication channels to ensure a smooth collaboration.
Deliverables
Initial meeting, requirements gathering, and team alignment. We define project scope, set expectations, and establish communication channels to ensure a smooth collaboration.
INTEGRATION PARTNERS
APIs and platforms we integrate
We integrate with industry-leading APIs and platforms to extend your application's capabilities and streamline your business operations.
WHY US
Why choose Design Key?
We value your time and work in sprints to make our work productive and easy to track. Our agile development processes ensure that the solution is delivered on schedule without compromising on quality.
Timely Delivery
We value your time and work in sprints to make our work productive and easy to track. Our agile development processes ensure that the solution is delivered on schedule without compromising on quality.
Rigorous Quality Assurance
Our QA engineers collaborate with developers and UI/UX designers for superior testing and quality control. Through rigorous testing protocols and efficient code, we guarantee smooth app navigation and maximum user goal attainment.
After-Launch Support
Our support doesn't stop when the work is done. We can continue to assist and check if the integrations perform well and meet the required metrics. After the launch, we can quickly fix any issues and make improvements.
Efficient Communication
Dedicated managers keep our clients consistently informed about the project status and provide a clear view of every tech decision and its results.
Expert API Architecture
We design clean, well-documented API architectures with proper versioning, error handling, and rate limiting that stand the test of time and scale.
Security-First Integration
Every integration is built with security at its core — encrypted data in transit, secure token storage, and compliance with industry standards like PCI-DSS and SOC 2.
WHAT OUR CLIENTS SAY
Real results from real clients
Trusted by startups and growing businesses
"Daniel and his team have worked on several infrastructure development projects for me. They are excellent experts with exceptional client service and communication skills. Able to dig through complex project requirements and produce an end product that exceeds expectations."
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Ready to get started?
Ready to connect your systems?
Schedule a 30-minute intro call with Daniel Killyevo, Founder and Technical Lead at Design Key. We'll discuss your integration needs and how to build seamless connections that power your business.
🚀 Usually respond within 24 hours • 📍 Tampa, FL & Kyiv, Ukraine
FAQ
Questions? Answers.
Common questions about our API integration services.