We’re on the lookout for… 

An experienced Test Developer

Join our digital team help us ensure all our energy management tools are rolled out with end to end automation testing. We operate a microservice architecture in GCP using Typescript & NodeJS for our back-end on Kubernetes with Express and TypeORM. Our front end is Cordova based. 

This is a great opportunity to join an amazing business at an exciting time in our development, with recent investments enabling a platform for significant future growth. As part of the Platform team, you will need the gravitas and ability to effectively communicate with a wide range of internal and external stakeholders at a technical level.  You will also need to mentor junior developers and work within an agile environment. 

What’s in it for you?  

Diversity: We actively look to reflect the variety of our world and welcome the widest diversity of applicants – it’s only your talent and experience that matters. 

Permanent: We’re a growing SME and see this role as a permanent member of our growing team. We’ve got lots of plans up our sleeves for exciting new things!  

Working Hours: We’re looking for about 37.5 hours a week for this role – what would generally be called Full Time. How that breaks into days or a working pattern will be agreed with your line manager, we are very flexible but we must make sure that our customers are always receiving the best service.    

Working Times: Our policy allows working anywhere at anytime, ultimate flexibility. We’d like at least some of your working hours to be coordinated with other internal and external team members to ensure we’re being efficient and communicating effectively. We think work should fit your lifestyle, so you can work when you can be most efficient! 

Location: We’d like to see you in our Cardiff city centre offices often enough for you to be able to do the job effectively, integrate our ethos and work with the team. But otherwise, we’re focused on you doing the work, not where you choose to do it. We’re fully set up for virtual working! 

Salary: We’ll be competitive (of course) so we’re budgeting around £30,000 per annum depending on experience. This also depends on what we agree between us your preferred weekly total hours. 

Perks: You’re helping save the planet! 

Also, 6% pension contribution from us; healthcare with family & dental options; electric vehicle scheme; equity scheme; cycle to work scheme; training & development support of course; office fruit bowl & refreshments! 

What we’re after 

We want team players who’ll integrate well, pitch in to help others as needed, and make being at work at least something approaching fun from time to time.  

We’re a small but growing business, and you’ll need to be self-motivated, completely trustworthy and able to manage your own delivery to hit milestones.

You’ll be flying the flag for us to partners, so being personable and a good communicator will be important.  

We control devices within our customers’ homes and collect a lot of data, so having an understanding of IoT automation and data streaming would be great. 

Being a bit “eco” definitely isn’t going to hurt either! 

What we’ll be asking you to do 

You will be responsible for development and delivery of the test automation supporting end to end IT solutions that enable Sero to manage customer interactions, new tooling portfolios supporting carbon neutral developments, energy optimisation and predictive modelling. Your scope will cover the full suite of tools and your responsibilities, outside of delivering test automation, will include; 

  •  Understanding the user stories and working with the scrum team to identify appropriate tests to incorporate into the release process
  •  Highlighting opportunities to improve the reliability and stability of releases through enhanced QA
  •  Gaining a deep understanding of the Sero architecture and likely failure points
  •  Proactively identify edge cases and capture these in test scenarios

 What about skills & qualifications? 

At least 3 years experience as a software test developer.  

Experience working with BrowserStack on typescript + node products for both mobile and web 

Highly developed oral and written communication skills 

Experience working with cloud platforms, preferably using Kubernetes in a microservice environment. 

Knowledge of designing and implementing CI/CD  

A deep understanding of relational and non-relational data stores 

Awareness of Agile principles and the benefits of the differing methodologies. 

Experience working in a devops environment is also useful 

Who are we? 

Sero was founded to make a connection between homes and energy, and to use technology to make both these easier and smarter together. We do this to save our customers money and to save them time, but we also do it to save our planet. 

To tackle the Climate Emergency, we provide clever energy services that automatically reduces the carbon footprint of the homes we run. To do this, we work with other home builders and landlords to help them understand what to do with their buildings to achieve this. 

We also try and lead by example, so through our sister company Sero Homes we build true zero carbon homes, set in ecologically vibrant spaces and places (there’s a and Biodiversity Crisis too!), so that our homes help to build a community. 


If you think we’re a match, please get in touch! 

We’d like a C.V., but send it with a covering note too please that tells us why you’d be our perfect fit for our team.  

Your note can be a letter, email, video snippet, go crazy, give us a little bit of your character…