Charles Muathe Ndirangu

I lead backend development

I work as a contractor to design backend applications for multiple clients through Adeiva

Technologies: AWS, Go, Python, Apache Kafka, Terraform, Jenkins(CI/CD pipelines)

I led efforts to improve the net promoter score of Cadana's platform, evolving it from a payroll processing engine into a comprehensive Employer of Record (EOR) solution. This shift empowered companies to seamlessly scale their engineering teams across diverse geographical regions with complete compliance.

I leveraged Golang, Lambda, DynamoDB, S3, API Gateway to build a contract management service for employee and contractor agreements directly within the platform, this enabled companies draft legal compliant contracts.

I led the design and development of a robust multi-tenant permissions service within the Cadana platform, facilitating granular access control and tiered user privileges.

In order to improve platform observability I used Go and AWS SQS to build a custom metrics collection library. It was utilised by all API workflows across microservices in production. The metrics were pushed to AWS Cloudwatch which visualised API performance providing comprehensive insights into API request handler behaviours.

I used Go, and SQS to develop a library that categorises errors according to severity and send the alerts to PagerDuty this streamlined on-call processes for the backend infrastructure.

I enhanced API security by developing a custom rate limiting library as part of the API payment gateway's authentication flow. This Go service prevents unauthorised transactions of malicious actors.

Technologies: Go, AWS (EC2 and Lambda for compute, DynamoDB as the database, SNS for pub/sub, Kinesis for streaming data, Cloudformation for Infrastructure as Code, Cognito for Authentication and Authorization)