Senior Backend Engineer – Real-Time Switching Systems

Lesaka Technologies; Wes-Kaap; Hybrid; ZAR 1,200,000 - 1,900,000; Full time

Job summary

Lesaka Technologies in Cape Town invites a Senior Backend Engineer to design and build high-performance switching systems that route and process real-time transactions at scale.

You will own backend services, work with low-latency, concurrent systems, and contribute to reliability, observability, and protocol-level integrations. Hybrid or on-site work with a strong focus on production-grade engineering.

Qualifications

• 5–8+ years of backend software engineering experience.
• Proven experience building high-throughput, low-latency systems.
• Experience working on switching, routing, or real-time processing systems (telecom, payments, networking).
• Deep understanding of concurrency, multithreading, and asynchronous systems.

Responsibilities

• Design and implement switching/routing engines for high-throughput, low-latency systems.
• Build systems that handle real-time decisioning, routing, and failover.
• Develop protocol-level integrations (e.g., TCP/IP, HTTP, gRPC).
• Ensure correctness, ordering, and idempotency in transaction flows.
• Optimize systems for latency, throughput, and fault tolerance.
• Design for high availability and graceful degradation.
• Implement robust retry, backoff, and circuit-breaking mechanisms.
• Debug complex production issues in distributed systems.
• Build and maintain backend services and APIs.
• Work with data stores (relational and/or NoSQL) to support high-scale workloads.

Skills

Go

Java

C++

Rust

Concurrency/Multithreading

Distributed systems

Networking protocols

Databases

Job description

Lesaka Technologies in Cape Town invites a Senior Backend Engineer to design and build high-performance switching systems that route and process real-time transactions at scale.

You will own backend services, work with low-latency, concurrent systems, and contribute to reliability, observability, and protocol-level integrations. Hybrid or on-site work with a strong focus on production-grade engineering.