Senior Backend Engineer (.NET / C#) at 247Bet

Role Description

• This is a full-time hybrid role for a Senior Backend Engineer, based in Lagos — hybrid, with 3 days per week in the office. You'll build the core systems that move real money in real time: the wallet, bet engine, live betting, settlement, copy-betting infrastructure, and the social feed. Our stack is modern .NET on AWS, and the engineering bar is high — correctness and reliability aren't optional when a dropped message means a mis-settled bet. This is a hands-on role for an experienced engineer who wants meaningful ownership of production systems at a company still small enough for individual work to be visible.

What You'll Do

• Design, build, and ship backend services in C# / .NET 8+ across wallet, betting, settlement, and social domains
• Build event-driven systems on Kafka with exactly-once semantics where money is involved
• Model and optimise data in PostgreSQL, with Redis for caching and real-time state
• Integrate with third-party providers — odds and trading feeds, payment gateways, KYC, and fraud tooling
• Write well-tested, observable, production-grade code, and own your services in production
• Participate in design reviews, code reviews, and incident response
• Optimise for real-world Nigerian conditions: unreliable networks, retries, and idempotency everywhere
• Collaborate with frontend and mobile engineers on clean, efficient API contracts
• Mentor mid-level engineers and help raise the team's engineering bar

What We're Looking For

• 5+ years of backend engineering experience with deep expertise in C# / .NET (ideally .NET 6+/8)
• Strong fundamentals in distributed systems, API design, event-driven architecture, and data modelling
• Hands-on production experience with PostgreSQL and Redis; Kafka or an equivalent message broker
• Solid cloud experience — AWS preferred; Kubernetes/EKS a strong plus
• A track record of building systems where correctness matters: payments, ledgers, trading, or similar
• Strong testing discipline and familiarity with CI/CD pipelines
• Clear communication and comfort working closely with product and other engineering teams
• A pragmatic bias for shipping — clean code, but delivered

Nice to Have

• Experience in betting, gaming, fintech, or other high-transaction-volume platforms
• Familiarity with BFF (Backend for Frontend) patterns for mobile and web clients
• Exposure to observability tooling — Datadog, OpenTelemetry, or equivalent
• Experience building for African markets, especially Nigeria