API Engineer (DevOps / .NET Core) – Core Banking API Engine at a Next-generation Core Banking Solutions - Stretch-it Concepts Limited

Stretch-it Concepts Limited - Our client is a next-generation Core Banking solution. Our Core Banking API Engine powers seamless digital services across Internet Banking (IB), Corporate/Institutional Banking (CIB), and third-party fintech ecosystems. We deliver secure, scalable, and high-performance APIs that enable financial institutions to innovate and grow.

They are recruiting to fill the position below:

Job Title: API Engineer (DevOps / .NET Core) – Core Banking API Engine

Location: Lagos
Employment Type: Full-time (Hybrid)
Reports To: Team Lead API Management

Role Overview

• We are seeking an API Engineer with strong DevOps expertise to help design, build, and scale the Core Banking API Engine. You will be responsible for developing mission-critical APIs and microservices using .NET Core, automating deployments with CI/CD pipelines, and ensuring banking-grade security, compliance, and high availability.
• This role is central to connecting the core banking system with digital channels, fintechs, and partner ecosystems, making it a critical position in Finedge’s growth.

Key Responsibilities
API Development:

• Design, develop, and maintain Core Banking APIs using .NET Core (C#).
• Build microservices that support account management, payments, loans, treasury, and compliance modules.
• Define and enforce API standards (OpenAPI/Swagger, JSON, gRPC).
• Integrate with core banking systems (Finedge, Temenos, Flexcube, Finacle, or custom-built engines).
• Ensure backward compatibility and versioning for APIs in production.

DevOps & Infrastructure:

• Build and maintain CI/CD pipelines (Azure DevOps, GitHub Actions, Jenkins).
• Containerize services with Docker and manage orchestration with Kubernetes (AKS/EKS/GKE).
• Automate infrastructure with Terraform/ARM templates (IaC).
• Monitor API performance and uptime using Prometheus, Grafana, ELK, New Relic, or Datadog.

Security & Compliance:

• Implement OAuth2, OpenID Connect, JWT, and certificate-based authentication for APIs.
• Secure APIs against threats (rate limiting, throttling, WAF integration).
• Apply OWASP API Security Top 10 best practices.
• Ensure compliance with PCI-DSS, ISO 27001, GDPR, and regional banking regulations.

Collaboration & Process:

• Work closely with DevOps, and product teams to deliver features.
• Participate in Agile ceremonies, sprint planning, and architecture discussions.
• Write and maintain API documentation for internal and third-party developers.
• Support sandbox and developer portal initiatives for external partners.

Requirements

• Bachelor’s/Master’s degree in Computer Science, Software Engineering, or related field.
• 4+ years of backend/API engineering experience.
• Expertise in .NET Core (C#) and API frameworks.
• Strong experience with RESTful API design and microservices architecture.
• Proficiency in Docker, Kubernetes, and CI/CD pipelines.
• Knowledge of relational (SQL Server, PostgreSQL) and NoSQL (MongoDB, Redis) databases.
• Experience with API Gateway platforms (Kong, Apigee, Azure API Management, or AWS API Gateway).
• Familiarity with event-driven systems (Kafka, RabbitMQ, Azure Service Bus).
• Strong understanding of security (SSL/TLS, secrets management, tokenization, encryption).

Preferred Skills:

• Experience with Core Banking Systems (e.g., Temenos, Finacle, Flexcube, T24) is an added advantage
• Knowledge of Open Banking standards (PSD2, ISO 20022, OpenAPI, FDX).
• Hands-on experience with cloud platforms (Azure preferred, AWS/GCP).
• Exposure to service mesh (Istio, Linkerd) for secure microservices communication.
• Performance/load testing of APIs for high-volume financial transactions.

Application Closing Date
15th November, 2025.

How to Apply
Interested and qualified candidates should send their CV to: jobs@stretchitconcepts.com using “Application – API Engineer (DevOps/.NET Core) – Core Banking API Engine'" as the subject of the mail.