Mid-Level API Developer - 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 RoleWe 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 ResponsibilitiesDesign, develop, and maintain RESTful APIs and integrations with third-party and enterprise systemsIntegrate with identity and authentication providers to support SSO, 2FA, password reset, and session managementDevelop integrations with e-signature platforms such as DocuSign or similar solutions to support contracts, addendums, and termination workflowsIntegrate with CRM and leasing systems to synchronize unit listings, inquiries, leads, offers, and other relevant dataDevelop integrations with access-control systems for access cards, visitor codes, and vehicle registrationSupport payment and invoicing integrations, including invoice generation triggers, proof-of-payment workflows, and payment-status synchronizationIntegrate with email and SMS notification gateways for alerts, confirmations, and renewal notificationsIntegrate external data feeds, such as weather and events APIs, where requiredBuild middleware and orchestration logic to keep data and application states synchronized across multiple systemsDefine and maintain API contracts using OpenAPI/SwaggerImplement secure authentication and authorization mechanisms using OAuth2, OIDC, and JWTDesign robust error-handling, retry, and recovery strategies for integrationsImplement webhook and event-driven handlers for asynchronous workflows such as e-signature completion, payment confirmation, and access-control approvalsCoordinate with internal teams, client IT teams, and third-party vendors to manage integration environments, credentials, and API accessSupport the promotion of integrations from sandbox/testing environments to productionDevelop integration, API, and contract tests and support QA and UAT activitiesMonitor API performance, logs, and error rates and troubleshoot integration issues during production and hypercare periodsMaintain technical documentation, integration architecture diagrams, and operational runbooks to support knowledge transfer and handoverCollaborate with developers, QA engineers, product teams, and external vendors to ensure successful delivery of integration-dependent featuresRequirements4+ years of experience in API development, backend development, or integration engineeringStrong hands-on experience building and consuming REST/JSON APIs in production environmentsSolid understanding of OAuth2, OIDC, JWT, and webhook-based architecturesExperience integrating with at least one e-signature platform such as DocuSign, Adobe Sign, or a similar solutionHands-on experience with SSO and identity providers such as Azure AD, Okta, Auth0, or similarStrong proficiency in at least one backend technology such as Node.js, .NET, or JavaExperience working with API gateways, middleware, message queues, or iPaaS solutionsExperience with API testing tools such as Postman/NewmanStrong understanding of API security best practices, including rate limiting, input validation, authentication/authorization, and secrets managementExperience designing integrations and translating business requirements, user stories, and acceptance criteria into technical solutionsStrong troubleshooting and problem-solving skillsGood understanding of integration testing and production support practicesStrong communication and collaboration skills, with the ability to work effectively with technical and non-technical stakeholdersNice to HaveExperience working with access-control or physical-security system APIs, such as Genetec, Lenel, or similarExperience integrating with real-estate or leasing CRM platforms such as Yardi, MRI, Salesforce, or Microsoft DynamicsExperience with Azure API Management, MuleSoft, or similar API management/integration platformsExperience working with event-driven architectures and message brokersExperience working in enterprise integration or digital transformation projectsWhat Success Looks LikeAll required third-party and enterprise integrations are delivered, tested, and successfully pass UATAPIs and integrations are secure, reliable, and scalableIntegration-related issues are identified and resolved within agreed SLAsAPI and integration documentation is complete and clear enough to support the client's internal teams after handoverSmooth collaboration with client IT teams, vendors, developers, QA, and other stakeholders throughout implementation and production support