API Developer (Integration Engineer) - Onsite - KSA - 4 months - Octopus by RTG

Robusta Technology Group (RTG) is a key driver of digital transformation by providing a holistic tech ecosystem. RTG works with its local and international partners to help build digital customer experiences, establish engineering hubs and build ventures across multiple industries and domains. In this pursuit, RTG serves as a catalyst for impact and growth through events, spaces and content focused on creating impact and growth across the different interactions.

Octopus is proud to be part of the Robusta Technology Group (RTG), a leading tech consultancy group. With a decade of experience and a successful track record of delivering over 300 projects across Europe, the Middle East, and North America, RTG has established itself as a preferred employer in the Egyptian market. Octopus and Robusta are building a bridge between Europe and Africa, creating tailored hub solutions to connect companies with top talent across the globe.

About the Role

We are looking for an API Developer (Integration Engineer) to design, build, and maintain the integration layer connecting a digital Residents and Tenants Portal with various third-party and enterprise systems.

You will be responsible for developing secure and reliable APIs and middleware that enable key platform capabilities including authentication, e-signature, payments, access control, CRM integrations, and notifications.

The ideal candidate has strong experience in backend development and API integrations, with a solid understanding of API security, authentication protocols, webhooks, and event-driven architectures.

Key Responsibilities

• Design, develop, and maintain RESTful APIs and integrations with third-party and enterprise systems.
• 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 using OpenAPI/Swagger.
• Implement secure authentication and authorization mechanisms using OAuth2, 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.

• 4+ years of experience in API development, backend development, or integration engineering.
• Strong hands-on experience building and consuming REST/JSON APIs in production environments.
• Solid understanding of OAuth2, OIDC, JWT, and webhook-based architectures.
• Experience integrating with at least one e-signature platform such as DocuSign, Adobe Sign, or a similar solution.
• Hands-on experience with SSO and identity providers such as Azure AD, Okta, Auth0, or similar.
• Strong proficiency in at least one backend technology such as Node.js, .NET, or Java.
• Experience working with API gateways, middleware, message queues, or iPaaS solutions.
• Experience with API testing tools such as Postman/Newman.
• Strong understanding of API security best practices, including rate limiting, input validation, authentication/authorization, and secrets management.
• Experience designing integrations and translating business requirements, user stories, and acceptance criteria into technical solutions.
• Strong troubleshooting and problem-solving skills.
• Good understanding of integration testing and production support practices.
• Strong communication and collaboration skills, with the ability to work effectively with technical and non-technical stakeholders.

Nice to Have

• Experience working with access-control or physical-security system APIs, such as Genetec, Lenel, or similar.
• Experience integrating with real-estate or leasing CRM platforms such as Yardi, MRI, Salesforce, or Microsoft Dynamics.
• Experience with Azure API Management, MuleSoft, or similar API management/integration platforms.
• Experience working with event-driven architectures and message brokers.
• Experience working in enterprise integration or digital transformation projects.

What Success Looks Like

• All required third-party and enterprise integrations are delivered, tested, and successfully pass UAT.
• APIs and integrations are secure, reliable, and scalable.
• Integration-related issues are identified and resolved within agreed SLAs.
• API and integration documentation is complete and clear enough to support the client's internal teams after handover.
• Smooth collaboration with client IT teams, vendors, developers, QA, and other stakeholders throughout implementation and production support.