Senior C# / .NET Engineer (Fintech / Payments / Digital Platforms/ ERP/ Assessment Platform) at KloudOpp Limited

Role Summary

• We are hiring a Senior C# / .NET Engineer with 10+ years of hands-on backend engineering experience to design, build, and scale mission-critical platforms across:
  • Payments & Switching
  • Digital Banking
  • Crypto & Web3
  • Digital Lending
  • Fintech Infrastructure / BaaS
  • Personal Finance / Wealth
  • FX & Remittance
  • ERP & Commerce (including Fashion & Retail platforms)
• This is not an oversight or advisory role.
• You must be:
  • Deeply hands-on
  • Obsessive about clean architecture, SOLID principles, and best-practice code
  • Comfortable owning production systems
  • Result-driven, because your performance is tied to monthly milestones in an Agile delivery environment
• You will build and operate high-scale, secure, event-driven, cloud-native systems used in real financial workflows.

Tech Stack (You Must Be Strong In These):

• Backend: C# (.NET 8 / .NET Core), ASP.NET Core, Web APIs, Background Workers
• Databases: PostgreSQL (primary), MongoDB (unstructured data)
• Cloud: AWS (EC2, S3, RDS, Lambda), Azure (App Services, Functions, Event Grid, Service Bus)
• Caching: Redis
• Messaging / Events: RabbitMQ (or Azure Service Bus / similar)
• Architecture: Serverless, Event-Driven, Microservices, Clean Architecture, API-first systems

What You’ll Do

• Architect and build scalable, secure backend systems for fintech-grade workloads
• Design and implement event-driven and serverless architectures on AWS & Azure
• Build and maintain high-performance APIs using ASP.NET Core
• Own database design, performance tuning, and data integrity (PostgreSQL & MongoDB)
• Implement message-driven systems using RabbitMQ and background workers
• Write clean, testable, production-grade C# code following Clean Architecture and SOLID principles
• Enforce engineering best practices: code reviews, architecture standards, CI/CD discipline
• Collaborate in an Agile environment with clearly defined monthly delivery milestones
• Take responsibility for system reliability, scalability, performance, and security
• Mentor other engineers and raise the overall engineering bar
• Work closely with product and business to ship real business outcomes, not just features

Requirements
What We’re Looking For

• 10+ years of professional backend engineering experience
• Deep mastery of C# and .NET (Core / .NET 8+) in production environments
• Strong experience in fintech, payments, banking, lending, or high-scale platforms
• Proven experience with:
  • PostgreSQL (schema design, performance tuning, transactions, migrations)
  • MongoDB for unstructured or event data
  • Redis for caching and performance
  • RabbitMQ or similar message brokers
• Strong experience with AWS (EC2, S3, RDS, Lambda)
• Solid understanding of Azure serverless & event-driven architectures
• Strong grasp of:
  • Distributed systems
  • Event-driven design
  • Clean Architecture / DDD-style layering
  • Security, performance, and reliability engineering
• Writes clean, maintainable, testable, production-grade C# code
• Comfortable owning production systems and delivery outcomes
• Highly result-oriented and accountable to milestones

Performance & Culture:

• This role is delivery-driven
• You will have monthly milestones tied to real product outcomes
• You are expected to:
  • Ship
  • Improve system quality
  • Reduce technical risk
  • Increase platform reliability and performance
• We operate in an Agile, execution-focused environment
• High autonomy, high responsibility, high impact.

Salary

• N500,000 - N600,000 monthly
• Based on experience, delivery strength, and technical depth.