Senior Full Stack Engineer

So Energy – Senior Full Stack Engineer

Please note, we are not able to facilitate visa sponsorship OR relocation, at present or in the future and can therefore only consider candidates matching these requirements

• 🌱 Job Level: Senior
• 🌍 UK, Hybrid
• 💰 £65,000 - £85,000

Our Perks Values-driven: We are proud of our culture.Drive your own experience

• Personalised Learning and Development Budget
• Hybrid working hours – Each team has their own Smart Working Charter that empowers you to do your work in the best way you can
• Technology – Your choice of Mac or Windows
• 25 Holiday Days + your local bank holidays
• 1 Birthday Day – it only happens once a year!
• 3 So Giving Days - spend these days giving back to your chosen cause
• Religious Celebrations Leave
• Mental Healthcare – Sessions with Unmind
• Enhanced Family Leave

SO ENERGY - Who we are:

So Energy was created in 2015 because we knew energy suppliers could be better. Since then, we’ve grown rapidly but sustainably, with 300,000 customers and over 450 Energists (what we call our people). But we’re not done. We’re on the road to a net zero future, and thanks to our partnership with ESB, we’re well on the way. We’re customer-centric, tech-led, and passionate about sustainability.

We want to do the best we can for our customers, each other, and our planet, so we’ve created a workplace that's encouraging, supportive, and offers the opportunity for growth. As a company, we live by six core values that guide everything we do:

• Clear
• Honest
• Ambitious
• Inquisitive
• Caring
• Sustainable

The Role

Senior Full Stack Engineer at SO ENERGY

Reporting into our Senior Development Manager, Sam Patmore 👋, We are seeking Senior Fullstack Engineers to join our high-performance team led by our Director of Technology Muhammad Khan 👋. who has a clear understanding of software engineering practices and agile development. Someone who has experience with different technologies and can quickly learn and adapt to new ones and can help in technical decisions but who genuinely enjoys constructive technical debates.

We’re looking for someone who has experience with diverse technologies , can quickly learn and adapt to new ones, can help in technical decisions, genuinely enjoys constructive technical debates, and can influence others to continuously improve.

Our multi-disciplinary and culturally diverse, high-performance engineering team cover the full stack from Kotlin backend microservices to frontend Vue.js and Typescript.

As a senior engineer you will leverage your domain expertise to maintain code quality as well as help others to learn your domain. Like all engineers you are expected to expand your skills, to become a more rounded full-stack engineer, and contribute to all code bases.

As a team member you will gain a deep understanding of the Software Development Lifecycle to deliver value to SO Energy customers using agile processes supported by our in-house Data Analytics team.

Join a high-performance engineering team:

We are building a robust, performant, and scalable platform utilising a microservices architecture on Google Cloud. Our diverse tech stack features Vue.js on the frontend and Kotlin on the backend, but we also have some Ruby and Python.

As a fully empowered team member you'll play a pivotal role in building out our architecture quickly, with great attention to quality and detail, and innovating wherever opportunities are discovered – expanding our robust microservice based platform’s capabilities whilst keeping the Total Cost of Ownership low. The majority of time will be spent collaborating with your team members cutting code, or within our software guilds refining practices and learning about our technologies today and tomorrow.

What you’ll be getting up to:

• Designing and implementing capabilities across the entire stack, both frontend (JavaScript, VueJS, HTML, CSS, Typescript) and backend (Kotlin) technologies.
• Championing quality software and practices across the company, and leading small iterative improvements every day.
• Proactively seeking opportunities to improve the system as a whole; simplifying, refactoring and optimising to make development easier for you and your colleagues.
• Collaborating within a cross-functional and cross-disciplinary team (Frontend, Backend, Product, Data, QA) and foster a knowledge-sharing environment while mentoring junior team members.
• Delivering Business Value by driving shared and modern software engineering principles throughout the SDLC, including secure coding practices, TDD, BDD, risk-based testing levels and cadences, and cloud deployments in Google Cloud.
• Contribute to the development and improvement of internal tooling and environments, our whole system design, working as a customer of our SRE and DevOps capabilities.

Technologies:

• Willingness to become Fullstack / “all rounder” / “Pi-shaped” in our tech stack as quickly as possible.
• Deep on at least one backend or frontend and proficient in the other; or deep in backend and different frontend languages (e.g. C# and JS but not Node.js and JS).
• GitHub, Gradle, GCloud, bash, Regex, PostgreSQL, Json
• BE: JVM language (Kotlin preferred)
• FE: JavaScript (frameworks React, Angular, Vue preferred)

We believe this role will be a great fit if you:

• Have deep knowledge on one or more of React, Vue, JavaScript, Java or Kotlin, and experience in frontend, backend, or mobile development.
• Have a comprehensive understanding of system design and software architecture implementation principles. Be adept at applying the right methodologies for each task, adhering to established workflows while actively seeking and advocating for enhancements to our processes.
• Enjoy being agile and collaboratively working with others in an XP, Scrum, Kanban, hybrid.
• Aiming to elevate your career by growing into a leadership position.
• Are passionate about creating quality work, and helping others to do the same, focusing on never needing to be On Call.
• Continuously improving our Monitoring and Alerting, and Self-Restoring capabilities.
• Already have energy supply experience or are willing to learn this domain quickly; Similarly the rapidly changing renewable energy sector.
• Are comfortable communicating within diverse teams and apply their interpersonal skills to facilitate ceremonies and workshops.
• Learn quickly, and apply feedback cycles, spikes, walking skeletons, evolving our domain design to match and predict environmental changes eg regulatory.
• Are interested in developing your technological expertise including secure code, risk-based testing, and constructive peer or group-based reviews.
• Are willing to commit to our core company values: clear, honest, ambitious, inquisitive, caring, sustainable

Research shows that some people are less likely to apply for a role unless they are 100% qualified. Your experience, skills and passion will set you apart so tell us about your achievements, irrespective of whether they are personal or work-related, tell us about your journey, and about what you learnt.

So, if this role excites you, don’t let our role description hold you back, get applying!

APPLICATIONS CLOSE ON THE 6TH OF JUNE 2025

Hiring Process

1. Initial screening (30 minutes)
2. Hiring Manager Screen: (30 minutes)
3. Tech Task Interview (90 minutes)
4. Leadership Capabilities & Cultural Fit Interview (30 minutes)

Support – If you have a medical condition or an individual need for an adjustment to our process, and you believe this may affect your ability to be at your best – please let us know so we can talk about how we can best support you and make any adjustments that may be needed.

Support – If you have a medical condition or an individual need for an adjustment to our process, and you believe this may affect your ability to be at your best – please let us know so we can talk about how we can best support you and make any adjustments that may be needed.

Our Values

We look for people who share our values and can add to our culture. Values are shared beliefs that guide our decision-making, culture is how we function as a group and how we live our values as individuals.

Clear - The energy industry can be pretty complex so we strive to provide clear communication to our customers and colleagues

Honest - Transparency is key, Whether that's providing clear bills to our customers or trusting our staff to do the right thing.

Ambitious - All of us are ambitious about the future of So Energy and what we can contribute to it.

Inquisitive - We are also questioning the Status Quo to see if there is a better way to do things for our customers

Caring - We care about the work we are doing, our customers and our colleagues
Sustainable - As a renewable energy company we are providing sustainable products but we also care about sustainable careers. That's why learning and continuous development is so important to us.

Diversity, Equity, Inclusion & Belonging

At So Energy, we’re committed to cultivating an environment that promotes diversity, equity, inclusion and belonging. We are a global community and we believe our unique qualities should be celebrated as they are critical to our innovation. It’s essential to us that you bring your authentic self to work every single day, no matter your age, ethnicity, religion, citizenship, gender identity, sexual orientation, disability status, caring responsibilities, neurodiversity, or otherwise. Inclusion isn’t just an initiative at So Energy. We strive to embed it not just into our values but throughout our entire culture.