Who we are
Upstream is a global leader in mobile marketing automation and digital service innovation, enabling Mobile Network Operators (MNOs) and brands to grow revenue, improve customer engagement and succeed in the digital economy. With over two decades of experience and operations spanning 45+ markets across Africa, Latin America, Asia, Europe, and the Middle East, we are a trusted partner to more than 60 MNOs worldwide.
Headquartered in Athens, Greece, and with regional hubs in London, Dubai, Johannesburg, Lagos, São Paulo and Rio de Janeiro, Upstream combines global expertise with deep local insight. Our end-to-end approach encompasses strategy, creative development, technical deployment, campaign execution, and ongoing optimization, ensuring seamless, scalable, and performance-driven service delivery.
About the Role
In the context of our growing business and ongoing project needs, we are looking for an enthusiastic Software Engineer to join our Software Development team.
As a Software Engineer, you will be part of a competent team that works on mission–critical applications throughout the entire development lifecycle, from concept and design to developing and delivering to production. You will use a modern JavaScript tech-stack, such as React/Next.js, Express.js, to build both the public-facing and internal application modules of our products. You will work in a cross-functional team with QA Automation and DevOps Engineers, who are integral to our CI/CD process. You will collaborate with UI/UX Designers and Product Managers to produce our world-class Marketing Technology Platform.
We use the industry's best practices and prioritize providing an exceptional developer experience, which means that you will have the tools and support you need to thrive in your role. You'll have the opportunity to work with top-tier private cloud infrastructure like Kubernetes clusters and dedicated "performance labs" to ensure that we meet our Platform's performance and scalability needs. We believe in fostering an environment that allows you to reach your full potential and deliver high-quality work with confidence.
Your main responsibilities will be to:
• Write well-designed, testable, efficient software modules.
• Translate business specifications, designs, and wireframes into high-quality code.
• Create reusable components for the frontend component library.
• Prepare and produce releases of software modules.
• Troubleshoot and support existing products and infrastructure.
• Review, test, and debug code.
• Support continuous improvement by investigating alternatives and technologies and presenting these for architectural review.
Apply on company website Johannesburg, Gauteng, South Africa Remote (Global) Full-time
Upstream is hiring a Software Engineer, Full-stack JavaScript
About company
We’re pioneering digital acquisitions and sales across every mobile channel available to increase loyalty and engagement, bringing more customers and increasing their interactions.
For over two decades, we’ve been innovating new and exciting ways of boosting mobile engagement and acquisitions for our ambitious customers across the world.
Our platform delivers foolproof, targeted, automated campaigns that drive hyper-focused results with authentic outcomes. No fraud. No number pumping. Just real customers, sign-ups, and sales.