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A leading technology startup in climate-tech seeks a curious and passionate Junior Full Stack Engineer to design, develop, and maintain their SaaS platform. This role involves collaborating within a dynamic team to build impactful solutions that address complex environmental challenges. With a workplace culture that values adaptability and collaboration, you will be part of a mission-driven organization aiming to foster a more sustainable future.
We’re a mission-driven, well-funded startup on the cusp of launching a game-changing climate-tech platform, backed by three global banks . Our goal? To simplify complex challenges and help businesses build for the future. SMEs drive a significant share of global emissions but often lack the tools, resources, and support to respond. We’re delivering bold, practical solutions that enable them to operate smarter, stay ahead of regulation, and meet rising expectations from customers, investors, and partners.
Our platform empowers financial institutions and large organisation to work directly with their clients and supply chain partners to reduce operational risk, mitigate their climate impact, and drive real cost savings. We deploy through major institutions, enabling deep decarbonisation across global supply chains, fuelled by powerful data and automation. If you’re looking to build something that truly matters at the intersection of technology, sustainability, and impact, this is your chance to get in early and help shape a category-defining company.
At FourTwoThree, our engineering culture is built for the speed, complexity, and purpose of climate-tech. We’re a team of adaptable, business-minded generalists who thrive in a fast-moving environment and are passionate about building solutions that matter. We are:
Whether you're just starting out or have spent years writing scalable code, this is your chance to build fast, learn deeply, and make a real difference.
We’re looking for a curious and passionate Junior Full Stack Engineer to play a key role in designing, developing, and maintaining the server-side logic and infrastructure for K423’s SaaS platform. As a Full Stack Engineer, you should be highly curious with a background across the stack, a passion for building scalable and secure systems, and the ability to work within a close-knit team, learning and iterating quickly.
But most of all, we’re looking for:
If you’ve read this far, hopefully you’re already very keen on this opportunity and confident that it aligns with the kind of company you’d like to be a part of. As a last step before reaching out, please take a moment to review these points to ensure they align with your own career and personal preferences.