Open to opportunities

Justice Otuya

@justiceotuya

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I’m a Senior Frontend Engineer with 6+ years building scalable React/TypeScript web and mobile experiences.

Portugal

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What I'm looking for

I’m looking to own frontend architecture end-to-end, build high-performance React/TypeScript products, improve conversion through experimentation, and mentor teams in fintech/SaaS with strong code quality.

I’m a Senior Frontend Engineer with 6+ years building scalable, high-performance web and mobile applications in fast-growth product companies. I focus on owning work end-to-end—from architecture and implementation through production monitoring and iteration.

At Quidax, I architected and led the Ramp product, enabling seamless crypto on-ramping/off-ramping and coordinating technical rollouts with user acquisition strategies. For the Ghana launch, I implemented mobile money (MoMo) integration, GHS wallet, and KYC workflows, delivering regulatory-compliant, zero-downtime releases.

I’ve delivered advanced trading and conversion features, including Favorites, portfolio toggles, ODB charts, and landing pages powered by A/B testing. I also integrated backend APIs for Tiering & Cashback systems and led stability efforts during high-traffic launches while maintaining 100% uptime.

Earlier, I built nationwide helpdesk and appointment booking platforms at Digital Pulse Technologies, reducing technical issues by 70% and call-centre congestion through COVID-safe scheduling. I care deeply about code quality and mentoring—having introduced PostHog analytics, shipped secure 2FA flows, and mentored interns and engineers through ongoing leadership roles.

Experience

Work history, roles, and key accomplishments

Current

Software Engineer II

Current

Quidax

Aug 2024 - Present (1 year 10 months)

Architected and led the Ramp crypto on-ramping/off-ramping product and engineering-driven marketing rollouts. Launched Ghana with MoMo, GHS wallet, and KYC workflows, delivered advanced trading features and A/B-tested landing pages, integrated Tiering and Cashback APIs, and maintained 100% uptime during high-traffic releases.

React TypeScript React Query A B Testing MoMo Integration KYC Trading UI Features PostHog

Frontend Engineer

Quidax

Mar 2022 - Aug 2024 (2 years 5 months)

Fast-tracked Orderbook V1 delivery in six weeks by building end-to-end trading workflows for pair selection, order placement, and cancellation. Implemented an auto-voucher withdrawal system, rolled out PostHog analytics, integrated Platinum and Fincra gateways with 2FA, shipped React Native components, and improved communication and retention with reusable in-app UI flows and MJML email templates.

React Native TypeScript Order Placement & Cancellation PostHog 2FA Auto Voucher Systems MJML Email Templates

Frontend Engineer

Digital Pulse Technologies

Sep 2018 - Feb 2022 (3 years 5 months)

Built a nationwide helpdesk application that reduced technical issues by 70% and improved fraud detection. Developed a countrywide appointment booking system for exam registration, engineered reporting platforms that supported 30% revenue growth, and implemented support automation scripts that cut resolution times by 90%.

Frontend Engineering Fraud Detection Operational Automation Scripts Performance Optimization