Tier 3 Application Support & Integration Engineer

Tier 3 Applications Support & Integration Engineer

Lagos

Permanent Role

Job Description

We are seeking a highly skilled and experienced Tier 3 Applications Support & Integration Engineer to join our team on a permanent basis. The ideal candidate should have a minimum of 5 years of experience in backend development, system integration, and technical support, with strong expertise in networking, infrastructure, and database optimization.

Responsibilities:

• Provide Tier 3 technical support for enterprise applications, ensuring system reliability, stability, and high availability.
• Diagnose and troubleshoot complex backend and infrastructure-related issues involving APIs, databases, and networking components.
• Perform root cause analysis (RCA) for critical incidents and drive permanent resolutions.
• Optimize SQL queries, database structures, and indexes for improved performance.
• Manage and maintain network configurations, including TCP/IP, DNS, VPNs, and firewalls as they relate to backend applications.
• Support and troubleshoot cloud-based deployments, including AWS, Azure, and hybrid cloud infrastructures.
• Collaborate with DevOps teams to improve CI/CD pipelines, containerization (Docker, Kubernetes), and automation scripts.
• Ensure seamless system integrations between applications, mobile payment platforms, and telecom operator networks.
• Implement security best practices, including vulnerability management, API security, and secure data handling.
• Work closely with cross-functional teams to deploy system enhancements and performance improvements.
• Provide documentation and knowledge sharing for Tier 1 and Tier 2 support teams.

Required Qualifications:

To be considered for this role, you should have:

• 5+ years of experience in backend development and system support.
• Strong proficiency in C#, .NET Framework, and API development.
• In-depth expertise in SQL databases (performance tuning, indexing, query optimization, replication, backup strategies).
• Experience with networking protocols (TCP/IP, HTTP, FTP, SSL/TLS, DNS) and troubleshooting network-related issues.
• Hands-on experience with cloud platforms (AWS, Azure, GCP) and their networking components.
• Solid understanding of Linux and Windows Server administration.
• Strong problem-solving skills and ability to work effectively under pressure.
• Experience with RESTful APIs, SOAP, and microservices architectures.
• Knowledge of monitoring and logging tools (e.g., Checkmk. ELK Stack, Prometheus, Grafana, New Relic).
• Familiarity with containerization technologies (Docker, Kubernetes).

Beneficial Skills (Nice to Have):

• - Experience with Node.js for backend services.
• - Knowledge of messaging queue technologies (Apache Kafka, RabbitMQ, ActiveMQ).
• - Understanding of load balancing, caching mechanisms, and CDN solutions.
• - Exposure to Infrastructure as Code (IaC) tools such as Terraform or Ansible.
• - Experience with mobile payment integrations and telecom VAS platforms.

Added Advantages:

• Previous experience in Mobile VAS and Mobile Aggregation in Africa.
• Understanding of telecom and fintech integrations, including mobile payment solutions.
• Experience working in high-availability, low-latency backend systems.