j
johnkaranja657

John K

@johnkaranja657

FastAPI developer and server engineer for APIs payments and infrastructure

Kenya
Inglese, Swahili
Alcune informazioni sono riportate in lingua inglese.
Chi sono
I'm a full-stack developer and server infrastructure engineer based in Nairobi, Kenya, building production systems that hold up under real-world conditions. I specialize in FastAPI and PostgreSQL — REST APIs, multi-role auth, and 3D Secure payment integrations for fintech apps. I've managed 30+ servers across cPanel, CyberPanel, and Windows Server — setup, firewalls, DNS, email deliverability, SSL, and Grafana monitoring. I've migrated 200+ mailboxes with zero data loss and secured APIs using Burp Suite Pro. Need a backend API, a solid server, or email that stops going to spam? Message me.... Continua a leggere

Competenze

j
johnkaranja657
John K
offline • 
Tempo di risposta medio: 1 ora

Consulta i miei servizi

Amministrazione del server
I will set up and configure your linux or windows server from scratch
A partire da50 USD / progettoMaggiori dettagli
Applicazioni web full stack
I will build you a production ready rest API with fastapi and postgresql
A partire da80 USD / progettoMaggiori dettagli

Portfolio

Esperienza lavorativa

Freelancing_Career

Freelance Full-Stack Developer & Server Engineer

Freelancing Career • Lavoratore autonomo

Jan 2024 - Present • 2 yrs 4 mos

Designed and deployed production REST APIs using FastAPI and PostgreSQL for clients in the fintech sectors, including 3D Secure payment integrations. Managed 30+ Linux and Windows servers across cPanel, CyberPanel, and cloud VPS environments covering full setup, firewall configuration, DNS, SSL, and email deliverability. Migrated 200+ enterprise mailboxes across platforms with zero data loss. Built React/TypeScript frontends and conducted API security assessments using Burp Suite Professional.