Work Experience

Senior Backend Engineer with 4+ years of experience building scalable, fault-tolerant backend systems using Golang, microservices, and AWS. Proven ability to design systems, handle real-world failures, and deliver reliable backend services that support business growth.

About Ken MwangiEngineering BlogProjects

Career Timeline

Senior Backend Engineer

African Real Estate
2023-present • Nairobi, Kenya
  • Architected and implemented a microservices-based backend using nestJs, AWS and Graphql
  • Lead a backend team in rebuilding core media services using Go improving performance by 40%

Backend Engineer

KonzaTech Ltd.
2022 - 2023 • Hybrid
  • Designed and implemented REST and GraphQL APIs supporting core business workflows, serving thousands of daily requests in production
  • Built and maintained backend services using Node.js, Typescript & AWS, improving system reliability and reducing response latency
  • Integrated third-party services including payment gateways such as MPESA and messaging providers, ensuring secure and reliable transactions
  • Collaborated closely with frontend team to translate business requirements into scalable backend solutions

Junior Developer

KasukuTech Agency
2019 - 2022 • Nairobi, Kenya
  • Contributed to 20+ client projects using React, Vue.js, and WordPress
  • Optimized web applications for SEO and accessibility (WCAG 2.1 AA)

Backend Engineering Experience

Ken Mwangi is a Senior Backend Engineer with experience building distributed systems, microservices architectures, fintech APIs, cloud-native applications, and scalable backend systems using Golang, Python, FastAPI, AWS, Kubernetes, Docker, Kafka, RabbitMQ, and PostgreSQL.

Core Expertise

GolangMicroservicesAWSKafkaDockerPostgreSQLKubernetesSystem Design