Job Description Senior Software Engineer - Python React Salary: Competitive Location: Braintree, Essex Work Pattern: Hybrid Opportunity Overview We are working with a forward-thinking technology company developing cutting-edge solutions within the utilities sector. Their cloud-native platform integrates software, hardware, and distributed energy assets to enable real-time monitoring, automation, and control at scale. They are now looking to hire a Senior Software Engineer to play a key role in shaping the technical direction of their platform. This is a hands-on position combining strong engineering delivery with architectural ownership, offering the opportunity to work on complex, real-world systems across IoT, cloud infrastructure, and large-scale data environments. Key Responsibilities Design, build, and operate scalable backend systems using Python (Django) and AWS Lead architectural decisions across performance, scalability, reliability, and security Design and evolve APIs and data models for internal tools and customer-facing applications Drive IoT and device communication architecture across distributed systems Collaborate with product and design teams to translate real-world requirements into scalable solutions Contribute to frontend development using React and supporting infrastructure Build and optimise pipelines for ingesting and querying large-scale time-series data Improve system performance, data retention strategies, and reporting capabilities Work closely with hardware and edge teams on device provisioning and diagnostics Troubleshoot and resolve complex production issues Lead and contribute to architecture reviews and technical discussions Mentor and support engineers through code reviews, pairing, and design guidance Essential Skills and Experience Strong proficiency in Python and/or significant experience with React Solid experience with SQL and relational database design (MySQL preferred) Proven experience working with cloud infrastructure (AWS preferred) Experience with containerisation technologies such as Docker (ECS desirable) Strong understanding of RESTful API design Experience working with Django and React Demonstrated ability to design scalable, maintainable systems Strong problem-solving skills with a hands-on engineering mindset Desirable Experience Experience with microservices or event-driven architectures Exposure to time-series databases or large-scale data processing Experience working with IoT or distributed device environments Interest in renewable energy, industrial systems, or infrastructure technology Experience with modern frontend frameworks such as Next.js What’s on Offer Opportunity to shape the architecture of a complex, real-world platform High level of ownership and influence over technical direction Work within a small, collaborative, and high-impact engineering team Exposure to modern technologies and challenging engineering problems Flexible hybrid working environment Strong opportunities for career progression as the business scales Application Process If you’re interested in this opportunity, please apply with your CV and a short overview of your experience. Examples of relevant projects or systems you’ve worked on would be highly beneficial.