Senior Platform Engineer

Sonnedix Group; Greater London; Hybrid; GBP 90,000 - 135,000; Full time

Benefits offered by this job

Hybrid working

Generous annual leave

Paid parental leave

Work from anywhere (6 weeks/yr)

Sonnedix Academy

Wellbeing support

Job summary

Sonnedix Group is seeking a Senior Platform Engineer to own and evolve the shared AI platform that underpins Sonnedix's AI solutions. You will take platform design into production, ensuring safe connections to systems of record and core services.

You will lead reliability, security, release standards, observability and shared services, collaborating with AI, Delivery, DevOps, Cyber and Architecture to make complex workflows straightforward to build and operate.

Qualifications

• Experience building and running production platforms used by multiple teams.
• Strong focus on security, identity, automated testing, CI/CD, and observability.
• Ability to explain technical and risk trade-offs to technical and business stakeholders.

Responsibilities

• Own and evolve Sonnedix's shared AI platform in production.
• Ensure platform reliability, security, and day-to-day evolution.
• Collaborate with AI, DevOps, Cyber, and Architecture teams to ensure safe and scalable solutions.

Skills

Python

TypeScript

PostgreSQL

Kubernetes

Security

CI/CD

Observability

Job description

The Role

Want to help shape how AI is built and scaled at Sonnedix? As Senior Platform Engineer, you’ll implement and own the shared platform on which Sonnedix’s AI solutions are built, deployed and run. You’ll take the agreed platform design into production and make sure AI solutions can connect safely with our systems of record and other core systems.

This is a hands-on role with accountability for the platform’s reliability, security and day-to-day evolution. You’ll establish release standards, permissions, observability, evaluation and shared retrieval services, while working closely with the AI team, delivery partners, DevOps, Cyber and Architecture to make solutions safe and straightforward to build and operate.

Desirable skills

• Extensive experience building and running production platforms that other teams depend on, using a modern technology stack such as Python, TypeScript, PostgreSQL and Kubernetes.
• Strong experience across security, identity, automated testing, CI/CD and observability, with a clear focus on reliability and secure development.
• A track record of building and maintaining platforms pragmatically, with the ability to explain technical and risk trade‑offs clearly to both technical and business stakeholders.

AI & Digital Literacy

• Experience running large language model or agent workloads in production, or strong evidence of being able to develop this capability quickly.
• Understanding of AI evaluation, retrieval, model and prompt regression and agent observability, with good judgement around when AI or conventional software is the right solution.

We use English as our business language, please submit your CV in English. We deploy AI across the business, from generation and trading decisions to the everyday workflows of every team. We invest in our people’s digital fluency so everyone works alongside these tools with confidence.

Studies show that many qualified candidates hesitate to apply unless they meet every requirement. If this role excites you, but you don’t meet every single qualification, we still encourage you to apply. We value diverse skills, perspectives, and experiences that contribute to a stronger team.

In line with EU pay transparency requirements, salary ranges will be shared with candidates in the EU before progressing to the next stage of the recruitment process, and always before interview. This range reflects the typical starting pay for new hires. Pay above this level may apply in specific circumstances based on experience, skills, or role scope.

About Us

Sonnedix is a global renewable energy company delivering 100% clean electricity through a diversified portfolio of solar, wind, and storage assets.

With almost two decades of sustainable growth, we are committed to Powering a Bright Future, as we continue acquiring, developing, building, and operating renewable energy projects for the long-term, delivering innovative, tailored, and fully renewable energy solutions to our customers.

We help you thrive at work and beyond

A people‑first company, committed to offer flexibility, a family‑first approach, wellbeing and training support, and - above all - team connection and community!

We are tech‑fluent by design

Technology isn’t a support function, it’s how we run. We deploy AI across the business and future‑proof your career by investing in our people’s digital fluency.

We have nearly two decades of sustainable growth

Our successful track‑record of nearly 2 decades is testament to our strong sustainable growth focus. We are a reliable partner and employer, for the long term!

We are truly diverse and inclusive

A culture of listening to each other, educating ourselves, and implementing changes to improve and ensure every member of our One Team feels and knows they belong.

Hear from some of our team about Sonnedix: https://www.sonnedix.com/careers

What we offer

• One company, many careers - as the company grows, we offer the opportunity for you to develop your career with us
• An inclusive, international working culture with a diverse team of friendly professionals from across the world
• A commitment to flexibility - hybrid working, generous annual leave allocation with an additional four weeks of discretionary unpaid leave
• A family first company - generous paid parental leave and support for carers
• The ability to 'work from elsewhere', for up to six weeks in a year
• Summer working hours
• Financial, Social, Mental & Physical wellbeing support
• The Sonnedix Academy – a range of training and development opportunities including professional development, management and leadership programs, technical training, essential skills, DEI, mentorship and much more
• Dedicated learning paths, tools, and resources to help every colleague confidently use AI and digital tools in their work
• Fantastic office environments
• Social events, team building opportunities and One Team Network groups, which are employee‑led groups, based on shared identities, interests, backgrounds and life experiences

and many more local benefits!