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

KloudOpp Limited is a new early-stage educational technology (EdTech) and Service Provider startup based on an ambitious & exciting, yet realistic product vision.

We are recruiting to fill the position below:

Job Title: Senior C# / .NET Engineer (Fintech / Payments / Digital Platforms/ ERP/ Assessment Platform)

Location: Remote
Employment Type: Full-time
Working Hours: Monday – Friday, 9:00am – 6:00pm (West African Time), with 1-hour break
Resumption Date: March 2nd

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.

Application Closing Date
5th March, 2026.

How to Apply
Interested and qualified candidates should send their CV, Cover Letter (must answer the question below) and GitHub link (or equivalent portfolio of real production work) to: careers@kloudopp.com using the Job Title as the subject of the email.

Mandatory Cover Letter Question (Very Important):

• You are tasked with building a high-volume fintech payments platform using C#/.NET that supports:
  • Real-time transactions
  • Event-driven processing
  • PostgreSQL as the source of truth
  • Redis for caching
  • RabbitMQ for asynchronous workflows
  • A mix of AWS (Lambda, RDS, S3) and Azure (Functions, Event Grid / Service Bus)
• Explain, in detail:
  • The architecture you would design
  • How services communicate (sync vs async)
  • How you ensure reliability, idempotency, and data consistency
  • How you would structure the .NET solution (projects, layers, boundaries)
  • How you would handle scaling, failures, and observability
  • What trade-offs you would make and why
• We are not looking for buzzwords.
• We are looking for clear thinking, real-world experience, and production-grade engineering judgment.