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jimleston OsoiJO
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jimleston Osoi

@jimlestonosoi

Full-stack software engineer building React Native products at Swiftacare and voice-cloning applications with FastAPI.

Kenya
Message

At Swiftacare, I develop and maintain Node.js and TypeScript services and REST APIs on PostgreSQL, Redis, and AWS. I’ve also built React Native mobile features, including a redesigned call-log interface, and integrated Auth0 authentication.

I built VoxClone, a voice-cloning and speech-synthesis product using FastSpeech2, an ECAPA-TDNN speaker encoder, HiFi-GAN, and XTTS-v2. I shipped its FastAPI and WebSocket inference backend with a Next.js studio interface, taking it from prototype to a working end-to-end application.

Experience

Work history, roles, and key accomplishments

SW
Current

Full-Stack & Mobile Developer

Swiftacare

Jan 2023 - Present (3 years 10 months)

Developed and maintained Node.js/TypeScript backend services and REST APIs on PostgreSQL, Redis and AWS. Built React Native features for the mobile app, including a redesigned call-log interface, and integrated an Auth0 authentication flow.

EP

Frontend Developer

Element Pay

Jan 2022 - Dec 2023 (1 year 11 months)

Built React interfaces for converting crypto to local currency, working on a fintech product where transaction integrity, payment status handling and fraud risk shape product design.

IS

Full-Stack Developer

iSafari

Jan 2019 - Dec 2022 (3 years 11 months)

Built backend services, APIs and React Native mobile features end to end.

Education

Degrees, certifications, and relevant coursework

Mount Kenya University logoMU

Mount Kenya University

Bachelor of Computer Science, Computer Science

2020 - 2023

Bachelor of Computer Science degree from Mount Kenya University, completed in 2023.

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