Senior Frontend Developer

Jobs for Humanity; Johannesburg; On-site; ZAR 800,000 - 1,100,000; Full time

Job summary

A global technology company is seeking a Senior Frontend Engineer to develop mobile applications that support health workers in underserved communities. The ideal candidate has over 8 years of frontend development experience, particularly with React or React Native, and a strong background in mobile application development for Android. Responsibilities include ensuring code quality, collaborating with cross-functional teams, and analyzing user feedback for improvements. The role requires candidates to work overlapping hours with the USA (PST) timezone.

Qualifications

• 8+ years of experience in frontend development, specifically with React or React Native.
• Strong experience in developing mobile applications for Android, with iOS a plus.
• Experience working in distributed teams with diverse perspectives.

Responsibilities

• Develop mobile applications supporting health workers in underserved communities.
• Conduct thorough testing and peer code reviews to ensure quality and efficiency.
• Collaborate with product managers and designers to define and build features.

Skills

Frontend development

React

React Native

Android development

Algorithm problem-solving

Job description

Sand Technologies is a global leader in digital transformation, empowering leading organizations and governments worldwide to achieve their digital aspirations. We offer a comprehensive suite of services, including enterprise AI solutions, data science, software engineering, and IoT, delivered from our centers in the Americas, Europe, and Africa.

Our training programs, in partnership with organizations like the Mastercard Foundation, Amazon Web Services, Holberton, and ALX cultivate the next generation of agile digital leaders. Through recent strategic acquisitions, Sand Technologies has further strengthened its capabilities in advanced analytics and intelligent software development, enhancing our ability to solve our clients' most pressing challenges across telecom, utilities, healthcare, and insurance industries.

We believe in harnessing technology to deliver real impact and value, helping organizations bridge the gap between their current reality and digital future.

About the Client

Our client is a non-profit organization dedicated to developing software solutions that revolutionize disease detection, treatment, and eradication. Backed by leading global health foundations, they partner with NGOs, diagnostics manufacturers, and mission-driven organizations to deliver impactful digital solutions and scalable cloud services. Their team consists of experienced technologists passionate about leveraging AI, machine learning, and computer vision to solve complex global health challenges.

Job Description

As a Senior Frontend Engineer, you will play a key role in developing mobile applications that support health workers in underserved communities worldwide. These applications integrate cutting‑edge computer vision algorithms, intuitive UX design, and workflow tools while ensuring optimal performance on low‑end hardware and in environments with limited connectivity.

Key Responsibilities

• Ensure high‑quality, scalable, and efficient code by conducting thorough testing and peer code reviews.
• Collaborate with product managers, designers, and engineers to define and build features that meet product requirements.
• Continuously analyze app performance, user feedback, and industry trends to drive improvements.
• Monitor production environments and troubleshoot issues as they arise.
• Champion privacy, security, and regulatory compliance best practices.

Assessment Process

The technical evaluation for this role will focus heavily on algorithm problem‑solving skills, ensuring candidates demonstrate a strong foundation in data structures, algorithms, and computational thinking before proceeding to further stages.

If you're excited about building impactful technology in a fast‑paced, mission‑driven environment, we’d love to hear from you!

Qualifications & Requirements

• 8+ years of experience in frontend development, with expertise in React or React Native.
• Strong experience developing mobile applications for Android (iOS experience is a plus).
• Experience working in distributed teams with diverse perspectives.
• A self‑starter who thrives in ambiguity and is eager to innovate.
• Experience in medical devices, point‑of‑care diagnostics, or medical imaging is a plus.

Additional Information

Candidate must be Africa and must be willing to work overlapping hours within the USA (PST) Timezone