API Integration Engineer

robusta; Riyadh; On-site; SAR 279,000 - 502,000; Full time

Job summary

Robusta Technology Group (RTG) is seeking an API Developer (Integration Engineer) to design, build, and maintain the integration layer connecting a digital Residents and Tenants Portal with third‑party and enterprise systems.

You will implement secure APIs and middleware for authentication, e‑signature, payments, CRM integrations, and notifications, using OpenAPI/Swagger, OAuth2, OIDC, and JWT, in a modern backend stack.

Qualifications

• 4+ years of experience in API development, backend development, or integration engineering.

Responsibilities

• Design, develop, and maintain RESTful APIs and integrations.
• Integrate with identity and authentication providers to support SSO, 2FA, password reset, and session management.
• Develop integrations with e-signature platforms such as DocuSign or similar solutions to support contracts, addendums, and termination workflows.
• Integrate with CRM and leasing systems to synchronize unit listings, inquiries, leads, offers, and other relevant data.
• Develop integrations with access-control systems for access cards, visitor codes, and vehicle registration.
• Support payment and invoicing integrations, including invoice generation triggers, proof-of-payment workflows, and payment-status synchronization.
• Integrate with email and SMS notification gateways for alerts, confirmations, and renewal notifications.
• Integrate external data feeds, such as weather and events APIs, where required.
• Build middleware and orchestration logic to keep data and application states synchronized across multiple systems.
• Define and maintain API contracts usingOpenAPI/Swagger.
• Implement secure authentication and authorization mechanisms usingOAuth2, OIDC, and JWT.
• Design robust error-handling, retry, and recovery strategies for integrations.
• Implement webhook and event-driven handlers for asynchronous workflows such as e-signature completion, payment confirmation, and access-control approvals.
• Coordinate with internal teams, client IT teams, and third-party vendors to manage integration environments, credentials, and API access.
• Support the promotion of integrations from sandbox/testing environments to production.
• Develop integration, API, and contract tests and support QA and UAT activities.
• Monitor API performance, logs, and error rates and troubleshoot integration issues during production and hypercare periods.
• Maintain technical documentation, integration architecture diagrams, and operational runbooks to support knowledge transfer and handover.
• Collaborate with developers, QA engineers, product teams, and external vendors to ensure successful delivery of integration-dependent features.

Skills

REST/JSON APIs

OAuth2/OIDC/JWT

Backend development

Node.js

.NET

Java

API gateways

Postman/Newman

Security best practices

Event-driven architectures

Tools

DocuSign

Adobe Sign

Azure AD

Okta

Auth0

Job description

Robusta Technology Group (RTG) is seeking an API Developer (Integration Engineer) to design, build, and maintain the integration layer connecting a digital Residents and Tenants Portal with third‑party and enterprise systems.

You will implement secure APIs and middleware for authentication, e‑signature, payments, CRM integrations, and notifications, using OpenAPI/Swagger, OAuth2, OIDC, and JWT, in a modern backend stack.