API Developer/IT Officer

Responsibilities: API Gateway & Middleware Co-Management: Take direct administrative and configuration access in staging/production environments for our API Gateways (e.g., Kong, Apigee, WSO2, or AWS API Gateway). Design and deploy custom gateway routing rules, rate-limiting policies, response transformation scripts, and payload caching layers to shield client applications from slow vendor backend endpoints. Enforce modern API security mechanisms across all gateway endpoints, including OAuth2, Mutual TLS (mTLS), HMAC signature verification, JSON Web Tokens (JWT), and rate-limiting. Interface Standardized Specs & Mock Engine Creation: Author clear, comprehensive OpenAPI 3.0 / Swagger specifications, gRPC proto files, and JSON/XML schema definitions for all proposed digital features prior to vendor implementation. Build, host, and maintain high-fidelity mock servers and Postman API collections so internal front-end teams (iOS, Android, Web, POS) can design UI/UX features concurrently without waiting for backend vendor completion. Vendor Delivery Acceleration & Technical Oversight: Review technical design documents, database query structures, and API architecture proposed by the MSP; identify potential bottlenecks, race conditions, or unhandled exception flows before code is deployed. Execute rigorous Technical Acceptance Testing (TAT) on all API releases delivered by the vendor. Perform deep-dive root cause analysis on API failures using network traces, HTTP status codes, raw payload analysis, and Wireshark/Postman debugging tools to prove whether delays/failures stem from vendor resource understaffing or infrastructure bugs. Payment Switch & Third-Party Integrations: Directly manage technical sandboxing and production certification integrations for NIBSS payment rails, switching partners (Interswitch, Unified Payments), card schemes (Verve, Mastercard, Visa), and telecom USSD platforms. Design robust webhook processing infrastructure with automated retry queues (exponential backoff) to handle asynchronous payment status notifications without losing transaction state. Requirements: Bachelor’s or Master’s Degree in Computer Science, Computer Engineering, Software Engineering, or a related technical field. Minimum of 5+ years of progressive hands-on software engineering experience, with at least 3 years specialised in API integrations, middleware architecture, or technical delivery within a CBN-regulated bank, payment service bank (PSB), payment switch, or high-volume fintech operator. Deep, hands-on experience configuring and managing enterprise API gateways (Kong, Apigee, WSO2, or AWS API Gateway). Expert-level fluency in RESTful APIs, gRPC, WebSockets, SOAP/XML, ISO 8583, ISO 20022, and payment webhook architectures. Capability to write production-grade integration wrappers and middleware scripts in at least one modern backend language (Go, Java/Spring Boot, Node.js/TypeScript, or Python). Observability Tools: Advanced mastery of Postman/Newman automation, Swagger Editor, Charles Proxy, Wireshark, Datadog, or ELK Stack for API performance analysis . General Requirements: Strong integrity, professionalism, and commitment to excellence. Excellent written and verbal communication skills. Ability to work effectively in a fast-paced environment. Banking or microfinance experience will be an added advantage. Remuneration: NGN 6 Million – 8 Million Per Annum

Responsibilities: API Gateway & Middleware Co-Management: Take direct administrative and configuration access in staging/production environments for our API Gateways (e.g., Kong, Apigee, WSO2, or AWS API Gateway). Design and deploy custom gateway routing rules, rate-limiting policies, response transformation scripts, and payload caching layers to shield client applications from slow vendor backend endpoints. Enforce modern API security mechanisms across all gateway endpoints, including OAuth2, Mutual TLS (mTLS), HMAC signature verification, JSON Web Tokens (JWT), and rate-limiting. Interface Standardized Specs & Mock Engine Creation: Author clear, comprehensive OpenAPI 3.0 / Swagger specifications, gRPC proto files, and JSON/XML schema definitions for all proposed digital features prior to vendor implementation. Build, host, and maintain high-fidelity mock servers and Postman API collections so internal front-end teams (iOS, Android, Web, POS) can design UI/UX features concurrently without waiting for backend vendor completion. Vendor Delivery Acceleration & Technical Oversight: Review technical design documents, database query structures, and API architecture proposed by the MSP; identify potential bottlenecks, race conditions, or unhandled exception flows before code is deployed. Execute rigorous Technical Acceptance Testing (TAT) on all API releases delivered by the vendor. Perform deep-dive root cause analysis on API failures using network traces, HTTP status codes, raw payload analysis, and Wireshark/Postman debugging tools to prove whether delays/failures stem from vendor resource understaffing or infrastructure bugs. Payment Switch & Third-Party Integrations: Directly manage technical sandboxing and production certification integrations for NIBSS payment rails, switching partners (Interswitch, Unified Payments), card schemes (Verve, Mastercard, Visa), and telecom USSD platforms. Design robust webhook processing infrastructure with automated retry queues (exponential backoff) to handle asynchronous payment status notifications without losing transaction state.

Requirements: Bachelor’s or Master’s Degree in Computer Science, Computer Engineering, Software Engineering, or a related technical field. Minimum of 5+ years of progressive hands-on software engineering experience, with at least 3 years specialised in API integrations, middleware architecture, or technical delivery within a CBN-regulated bank, payment service bank (PSB), payment switch, or high-volume fintech operator. Deep, hands-on experience configuring and managing enterprise API gateways (Kong, Apigee, WSO2, or AWS API Gateway). Expert-level fluency in RESTful APIs, gRPC, WebSockets, SOAP/XML, ISO 8583, ISO 20022, and payment webhook architectures. Capability to write production-grade integration wrappers and middleware scripts in at least one modern backend language (Go, Java/Spring Boot, Node.js/TypeScript, or Python). Observability Tools: Advanced mastery of Postman/Newman automation, Swagger Editor, Charles Proxy, Wireshark, Datadog, or ELK Stack for API performance analysis . General Requirements: Strong integrity, professionalism, and commitment to excellence. Excellent written and verbal communication skills. Ability to work effectively in a fast-paced environment. Banking or microfinance experience will be an added advantage. Remuneration: NGN 6 Million – 8 Million Per Annum