Founding Engineer.
I build, deploy, operate,
and grow real software products.
Five self-built products, designed, shipped, and operated in production, each used by real people who depend on it.
About
I build software because it is how I solve real operational problems through technology. I have designed, built, deployed, and operated multiple production software products, from the first line of code to the customer using it.
I don't only write code. I also:
- Design products
- Design system architecture
- Deploy infrastructure
- Handle DevOps
- Talk to customers
- Do customer support
- Market products
- Prioritize features
- Iterate from user feedback
I enjoy taking a product from a rough idea to something live in production. My long-term goal is to found a world-class technology company.
Featured products
DavinaRadius
2024Multi-tenant ISP billing and network management SaaS for African ISPs.
Multi-tenant SaaS, live in production
ProductBackendInfrastructureDeploymentCustomer SupportMarketingDocumentation
DjangoPostgreSQLRedisCeleryCelery BeatDocker ComposeTraefikFreeRADIUSMikroTik RouterOS APIWireGuardS3 backupsStalwart MailCloudflare
Tenthliner
2025LegalTech platform for Kenyan court e-filing compliance.
Scaled to handle large PDFs with 2,000+ pages
ProductBackendInfrastructureCustomer Support
DjangoPyMuPDFCeleryRedisSeaweedFSClamAVDockerPaystack
57Places
2025Travel marketplace connecting travelers with African tour agencies.
Cold start solved via claimable agency profiles
ProductBackendInfrastructureInternal Tooling
CloudflareApplication-level cachingScheduled jobsInternal AI tooling
Clariss
2024Creative colour platform for designers, from extraction to palettes.
Around 4,000 monthly active users
ProductBackendFrontendCustomer Support
Client-side JavaScriptk-means clusteringServer-side caching
Take5
2026Browser-based word guessing game, play alone or challenge a friend.
ProductBackendFrontend
DjangoBootstrapJavaScript
Technical writing
Published technical articles for Vultr. I also write on LinkedIn about engineering, building products, customer service, and founding companies.
Timeline
Timeline coming soon.
Architecture & technologies
Backend & Data
DjangoPostgreSQLRedisPyMuPDFSeaweedFSClamAVk-means clustering
Infrastructure & DevOps
DockerDocker ComposeCeleryCelery BeatTraefikS3 backupsCloudflare
Networking & Identity
FreeRADIUSMikroTik RouterOS APIWireGuard
Payments & Messaging
PaystackStalwart Mail
Frontend & Client
BootstrapJavaScriptClient-side JavaScript
Other
Application-level cachingScheduled jobsInternal AI toolingServer-side caching
Contact
Email: sajeyksmwangi@gmail.com