Case Study: Building a Developer-First Ecosystem for a Global Payments Leader

How OpenTurf Technologies transformed partner onboarding with a Developer Portal and Sandbox

Executive Summary

A leading global provider of payment solutions, wanted to simplify and modernize how partners integrate with its APIs. The existing onboarding process relied heavily on manual documentation, email-based communication, and continuous technical handholding, leading to inefficiencies, errors, and long go-live timelines.

OpenTurf Technologies partnered with the client to design and implement a Developer Experience Portal and Sandbox, creating a self-service ecosystem where developers can discover, test, and integrate APIs independently. The solution streamlined partner onboarding, enhanced developer experience, reduced reliance on internal resources, and laid the groundwork for scalable growth in the competitive digital payments industry.

Client Background

The client is a global payments technology provider, offering card management, transaction processing, digital wallets, and API-driven payment solutions to banks, fintechs, and enterprises worldwide.

With its modular platform, the company empowers organizations to launch new financial products quickly. However, as its ecosystem of partners grew, so did the complexity of API integrations. Ensuring seamless, secure, and efficient developer access to APIs became a critical enabler for growth.

Business Challenge

Despite having a robust API framework (supporting both REST and SOAP), the client’s onboarding process had major pain points:

  • Manual Documentation – API specifications were shared over email, making them prone to errors, typos, and version mismatches.
  • Time-Consuming Processes – Each partner needed extensive support from the client’s technical team to set up and test APIs.
  • Lack of Standardization – Different teams and projects followed inconsistent practices, leading to confusion.
  • Maintenance Overhead – Updating documents and keeping partners aligned with the latest API changes was cumbersome.
  • Resource Strain – Valuable engineering hours were spent assisting partners instead of innovating.

The absence of a centralized system slowed down partner integrations, created operational inefficiencies, and limited the client’s ability to scale quickly in a highly competitive market.

OpenTurf’s Solution

OpenTurf designed and deployed a comprehensive Developer Portal and Sandbox environment to transform the client’s developer experience. The solution focused on automation, security, and scalability, turning integration from a manual, support-heavy process into a smooth, self-service journey.

Key Features

  1. Automated Partner Application Provisioning and Onboarding – Self-service portal with guided workflows and automated resource allocation (API keys, sandboxes, environments), enabling faster, consistent, and scalable partner onboarding.
  1. Centralized API Documentation – Always updated, searchable, and version-controlled to eliminate inconsistencies.
  2. Sandbox Environment – A secure testing playground where partners can experiment with APIs independently.
  3. SDKs (Software Development Kits) – Ready-to-use toolkits in multiple programming languages to speed up integration.
  4. Project & Product Management – Partners can request, test, and manage products in real time.
  5. User & Role Management – Flexible access controls for admins, partners, and developers.
  6. Test Case Management & API Explorer – Automates UAT for partner integrations, helping teams accelerate time-to-launch. Developers can run tests, review execution history, and compare expected vs. actual results in real time, ensuring faster, more reliable deployments.
  7. Security & Certificate Management – Encrypted request/response flows for safe testing.
  8. Notifications & Activity Logs – Transparent communication and compliance tracking.
  9. Prospective Partner Access – A demo environment with zeroed-out data, letting prospects explore without exposing live APIs.


Implementation Highlights

OpenTurf adopted an iterative and collaborative development approach, working closely with the client’s business and technical teams.

  • Phase 1: Discovery & Design
    • Assessed existing API onboarding challenges.
    • Designed the Developer Portal architecture aligned with the client’s infrastructure and security needs.
  • Phase 2: Build & Integration
    • Developed partner and admin portals with role-based access.
    • Built Sandbox testing with encryption support.
    • Integrated SDKs, documentation, and version control systems.
  • Phase 3: Testing & Refinement
    • Conducted sandbox test cases with pilot partners.
    • Refined usability through feedback loops.
    • Ensured compliance with security and data governance requirements.
  • Phase 4: Deployment & Handover
    • Launched the Developer Portal to partners.
    • Trained client teams for ongoing administration and scaling.

Results & Impact

The Developer Portal and Sandbox fundamentally changed how the client  interacts with its partners:

  • Accelerated Partner Onboarding – Time to integrate reduced significantly as partners could self-serve.
  • Error-Free Documentation – – Eliminated inconsistencies from manual processes, with the ability to continuously update and manage documents, keeping them up-to-date and live.
  • Lower Operational Costs – Reduced reliance on internal engineers for repetitive support.
  • Improved Partner Experience – Developers now enjoy a modern, intuitive experience similar to leading fintech platforms like Stripe or Razorpay.
  • Scalable Ecosystem – Supports seamless expansion as more APIs/products are added.
  • Enhanced Security & Compliance – Certificate management and sandbox encryption ensured safe, enterprise-grade testing.

Conclusion & Next Steps

By transforming a fragmented, manual process into a centralized, developer-first platform, the client has taken a major step toward future-proofing its business. The Developer Portal and Sandbox not only solve today’s onboarding inefficiencies but also position the company as a fintech enabler of choice for banks and enterprises worldwide.

The Road Ahead

  1. Expand portal with advanced analytics and dashboards.
  2. Launch a public-facing developer website with resources and community support.
  3. Add multilingual support for global partners.
  4. Explore marketplace-style features for partner-driven innovation.

With this foundation, the client is set to scale its ecosystem rapidly and strengthen leadership in the digital payments landscape.