Senior Software Engineer

Rayne
2 days ago
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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
Proven experience working with cloud infrastructure
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

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