Junior Software Developer

£29,047 - £30,944

Companies House

Caerdydd

Awst 28, 2025

Full-time

Disgrifiad o'r Cwmni

Job summary

We are looking for Junior Software Developers to join us at Companies House.  
  
Companies House is a place of digital innovation where you will develop our software services using JavaScript, Typescript and Java. We are a team who use agile practices, try new technologies and work flexibly to suit every individual.  
  
This role is instrumental for us to deliver on our goals as an organisation. You would be a part of a software team, writing code, learning and building your career.  

We are currently using a hybrid approach to the way we work. Our approach to hybrid working provides opportunities for you to be adaptable in the way you work so that you can achieve a healthy balance between your work and home life. We currently expect people to attend their base office a minimum of one day a week but the exact degree of choice you have will depend on your role and your day-to-day work activities and should be agreed through discussions with your line manager.  

Watch this video to find out more about working in Digital at Companies House

Companies House offers a flexible and welcoming culture that promotes a healthy work life balance as well as a proactive approach to wellbeing that allows us to be our best at work.  We recognise that people are the key to our success so offer a fantastic benefits package including flexible working with no core hours, 30 days annual leave, 8 bank holidays and 1 privilege day as well as enrolment into the Civil Service Pension scheme with a contribution rate averaging 28%.   

Find out more about what a great place Companies House is to work

Please note:

  • Companies House cannot offer Visa sponsorship to candidates through this campaign. 
  • This role is Cardiff based, with a hybrid of home and office based working to support your development.  The first few weeks of your role will be in the Cardiff office 5 days per week to get your training started (this is essential in-person attendance).  

Please see ‘Things you need to know’ and ‘Where will you be working’ sections below for more information.  

Job description

You will join a team of software developers as a Junior Software Developer.  

Your main responsibilities will be:  

  • You will develop software in one of Companies House approved languages (Java, JavaScript, Typescript) and frameworks (Node.js, Spring / Spring Boot), write unit tests and documentation and learn about code review, independent testing and how to deploy software into a production environment.
  • You will learn and follow the software development process, including coding standards, use of Scrum and automated security checks (SonarQube).
  • You may be involved in early-stage prototyping exercises.
  • You will resolve outstanding issues (including maintenance, bug resolution and business improvements).
  • You will learn about Information Security and become familiar with secure design processes.
  • You will join day to day Scrum stand up sessions and update your colleagues on your tasks.
  • You will work together to build relationships and support your team.  

You will be joining a passionate team of Developers with varying levels of technical abilities.  

Our teams also work closely with the architects and the platform team who manage our development pipeline using Concourse CI, SonarQube, AWS, Terraform and Artifactory. We use Docker containers and ECS.  
  
This is an exciting time to join us as we consistently evolve our own technical capabilities and ways of working to make the work, we do in Companies House more efficient and easier to use for our customers.  
  
We are currently working towards:  

  • Many releases per day automatically into production 
  • Automated test coverage for everything from accessibility to security and performance 
  • Constant innovation and running iterations of our services to meet and exceed user needs 
  • Ensure we are meeting the needs of our users by ensuring we have diversity in thought and ideas 

So, if you are looking for a place where you can focus on your own development as well as support others to succeed and perform at their best, then this is the role for you!  

Person specification

We’re looking for the following experience, which will be assessed at sift and at interview.  

Experience 

  • Have a passion for high quality, well-crafted code, and associated tooling.
  • Are keen to learn to develop using Java, JavaScript, Spring / Spring Boot, Node.js, AWS, Docker, REST APIs or already have some experience in any of these technologies.
  • Embrace continuous integration and develop a continuous delivery mindset.
  • Have excellent communication skills and can help explain complicated technical issues to individuals who don’t share the same technical experience.
  • Are excellent team players who will help support the wider team. 
  • Problem solving and logical thinking.  

Behaviours

We’ll assess you against these behaviours during the selection process:

  • Working Together
  • Developing Self and Others
  • Making Effective Decisions
  • Communicating and Influencing

Technical skills

We’ll assess you against these technical skills during the selection process:

  • Have a STEM degree with a programming element (candidates will be asked to provide evidence of qualifications and any predicted grades before assessment centre).
  • You need to be able to demonstrate that you can develop software in a language of your choice.
  • Coding

We only ask for evidence of these technical skills on your application form:

  • Have a STEM degree with a programming element (candidates will be asked to provide evidence of qualifications and any predicted grades before assessment centre).
  • You need to be able to demonstrate that you can develop software in a language of your choice.
Alongside your salary of £29,047, Companies House contributes £8,414 towards you being a member of the Civil Service Defined Benefit Pension scheme. Find out what benefits a Civil Service Pension provides.

We believe that our success is driven by the well-being and satisfaction of our team members at all levels of the organisation. At Companies House we’re committed to providing a comprehensive benefits package that goes beyond the ordinary, ensuring your career journey with us is not only fulfilling, but also rewarding. We pride ourselves on offering a quality work-life balance with our employee wellbeing being central to our working practices. 

Head to Our benefits – Working for us – Recruitment (companieshouse.gov.uk) to find out more about the fantastic benefits package we have at Companies House.  

We celebrate diversity… 

As an equal opportunity employer, we celebrate diversity, being committed to ensuring we’re representative of the citizens we serve and creating an inclusive environment. Everyone in Companies House brings something different, and so will you. To fulfil our commitment to recruiting and attracting diverse talent we welcome applications from underrepresented groups. We also welcome applications from Welsh speakers. 

We are proud to be a disability confident leader.  Our recruitment process is fully inclusive and we can make adjustments as needed through our process. These could include having an interview buddy, extra time at interviews/assessments and receiving interview questions in advance, to name a few. 

If you require any reasonable adjustments at application stage, or if you’d like to discuss any person-centred adjustments, please contact us by emailing [email protected].

Read our ‘Applying under the Disability Confidence Scheme (DCS)‘ guide to find out how to successfully complete an application under the Disability Confidence Scheme (DCS).

Where will you be working? 

You will be aligned to our Cardiff office, where you will be expected to attend on a regular basis (minimum 1 day per week but could be more dependent on development and business needs, and will be in the office full-time for the first few weeks). We are currently using a hybrid approach to the way we work which provides opportunities for you to be adaptable in the way you work so that you can achieve a healthy balance between your work and home life. The degree of choice you have will depend on your role and your day-to-day work activities. Your manager will agree regular patterns of attendance with you, however you may be required to make yourself available to attend the office more frequently when required to meet business needs.

Selection process details

This vacancy is using Success Profiles (opens in a new window), and will assess your Behaviours, Experience and Technical skills.

In your application form we’d like you to: 

  1. Tell us about your employment history, key responsibilities, projects worked on and achievements specifically relevant to the role responsibilities and experience required as detailed above. We’re keen to know the depth of your skills and experience so please include any details to demonstrate these. We’d specifically like to know what projects you worked on, for how long, what was your role, what technologies you used and project outcomes. 
  2. Provide details of Technical skill: STEM degree with a programming element, where you will have up to 250 words to provide details.  You will be asked to provide evidence of qualifications and any predicted grades before assessment centre.
  3. Please describe some software that you have written, how you approached the task, what techniques you used, what the outcome was and whether this was developed individually or as part of a team.  You will have up to 250 words to provide details.  
  4. Write a personal statement of 750 words where you demonstrate how you meet the required experience including examples to demonstrate your level of skill, to cover these role requirements: 
  • Working knowledge of programming tools, frameworks, and techniques in at least one of the following ecosystems: Java/Spring or Typescript/Node. 
  • Experience of developing software throughout the delivery lifecycle. 
  • Knowledge of RESTful APIs.  
  • A degree in computing or similar would be an advantage, or equivalent industry experience. 

What will the process look like?

Sift

  • Once the advert has closed we will sift applications – this involves reading through them all, please bear with us as this can take some time. 
  • We may raise the score required if we receive a high number of applications.
  • At sift we may choose to take through the highest performing candidates to the next stage. If, after the final stage is completed and roles are unfilled, we will proceed to invite lower scoring candidates to interview. 
  • Candidates will be asked to provide evidence of qualifications and any predicted grades before interview. 
  • At sift candidates will be assessed against your answers to the following criteria:
  1. Working knowledge of programming tools, frameworks, and techniques in at least one of the following ecosystems: Java/Spring or Typescript/Node. 
  2. Experience of developing software throughout the delivery lifecycle. 
  3. Knowledge of RESTful APIs.  
  4. A degree in computing or similar would be an advantage, or equivalent industry experience. 
  5. Candidates will be asked to provide evidence of qualifications and any predicted grades before assessment centre. 

Assessment centre (please note the portal refers to this stage as ‘interview 1’)

  • This will be in-person in our Cardiff office, and will be half a day.  Please note accommodation and transport will not be paid.  
  • This will your assess your ability to interact with others in a group setting and allow us to gain a better understanding of your communication style. This will be assessing Behaviours: Communicating and influencing & Working together. 
  • There will also be a written exercise, which will be a short logic test. You will not be required to write any code.  This will be assessing Experience: Problem solving and logical thinking.  

Presentation stage (please note the portal refers to this stage as ‘interview 2’)

  • Successful candidates from the assessment centre will be invited to deliver a 10 minute presentation (with 5 minute follow-up discussion), which will conducted using Microsoft Teams. 
  • The presentation topic will be released in the confirmation email once you have booked a presentation timeslot.  
  • The presentation stage will be assessing Behaviour: Communicating and influencing.  We’re keen to see you can research something relatively unfamiliar and present it in a short presentation.

Interview (please note the portal refers to this stage as ‘interview 3’)

  • Successful candidates from the presentation stage will be invited to attend a virtual interview, which will conducted using Microsoft Teams.
  • We use a blended interview technique, allowing us to find out more about you.
  • We use the Success Profile framework and at interview we will use Success Profiles assessing the Behaviours and Technical Skills listed in the advert.
  • As part of the interview, you will be asked to complete a written coding exercise.  Details will be emailed to you 1 hour before your interview start time.  You’ll have 1 hour to work through the activity and then you’ll join the Teams call at your interview start time.  You’ll be asked to screen share, discussing the exercise with the panel and answering some live questions to demonstrate your level of skill.   This will be assessing Technical Skill: Coding.  
  • You’ll then move on to the Behaviours questions.  
  • The lead criteria to distinguish between tied candidates will be the Technical Skills listed above.  
  • A reserve list may be held for up to 12 months from which further appointments may be made for the same or similar roles.

Key dates (dates are indicative only and could be subject to change)

  • Closing date: 28 August 2025 (at 23:55)
  • Sifting: 29 August – 2 September 2025
  • Assessment centre: 11 September 2025 (in Cardiff office)
  • Presentations: 19, 22 & 23 September 2025 (via Teams)
  • Interviews: 1, 2 & 3 October 2025 (via Teams)

We’re committed to being diverse and inclusive, so please make your application anonymous by removing all identifying personal information (such as your names and age) from your employment history and personal statement.

Our recruitment process is underpinned by the principle of recruitment based on fair and open competition with decisions made on the basis of merit, as outlined in the Civil Service Commissioners’ Recruitment Principles. 

Artificial Intelligence (AI)

Artificial Intelligence can be a useful tool to support your application, however, all examples and statements provided must be truthful, factually accurate and taken directly from your own experience. Where plagiarism has been identified (presenting the ideas and experiences of others, or generated by artificial intelligence, as your own) applications may be withdrawn and internal candidates may be subject to disciplinary action.  Please see our candidate guidance for more information on appropriate and inappropriate use.

Sponsorship

Companies House cannot offer Visa sponsorship to candidates through this campaign. Companies House holds a Visa sponsorship licence but this can only be used for certain roles and this campaign does not qualify. Should you apply for this role and require sponsorship, your application may be rejected, and any provisional offers of employment withdrawn.  

Nationality statement  

Candidates will be subject to UK immigration requirements as well as Civil Service nationality rules. If you’re applying for a role requiring security clearance, please be aware that foreign or dual nationality is not an automatic bar. However certain posts may have restrictions which could affect those who do not have sole British nationality or who have personal connections with certain countries outside the UK. 

As part of our recruitment process, it is essential for all candidates to independently verify their eligibility to work in the UK before applying.  This includes a thorough check of your right to work to ensure compliance with UK employment laws, being mindful of the recent changes to going rates detailed on GOV.UK.  

Please ensure you have the necessary documentation and permissions in place. Our team is dedicated to fostering a diverse and inclusive workforce and encourages applicants from all backgrounds to apply. However, it is the candidate’s responsibility to ensure they meet the UK’s legal requirements to work.  

Feedback will only be provided if you attend an interview or assessment.

Security

Successful candidates must undergo a criminal record check.
People working with government assets must complete baseline personnel security standard (opens in new window) checks.

Nationality requirements

This job is broadly open to the following groups:

  • UK nationals
  • nationals of the Republic of Ireland
  • nationals of Commonwealth countries who have the right to work in the UK
  • nationals of the EU, Switzerland, Norway, Iceland or Liechtenstein and family members of those nationalities with settled or pre-settled status under the European Union Settlement Scheme (EUSS) (opens in a new window)
  • nationals of the EU, Switzerland, Norway, Iceland or Liechtenstein and family members of those nationalities who have made a valid application for settled or pre-settled status under the European Union Settlement Scheme (EUSS)
  • individuals with limited leave to remain or indefinite leave to remain who were eligible to apply for EUSS on or before 31 December 2020
  • Turkish nationals, and certain family members of Turkish nationals, who have accrued the right to work in the Civil Service

Further information on nationality requirements (opens in a new window)

Working for the Civil Service

The Civil Service Code (opens in a new window) sets out the standards of behaviour expected of civil servants.
We recruit by merit on the basis of fair and open competition, as outlined in the Civil Service Commission’s recruitment principles (opens in a new window).
The Civil Service embraces diversity and promotes equal opportunities. As such, we run a Disability Confident Scheme (DCS) for candidates with disabilities who meet the minimum selection criteria.
The Civil Service also offers a Redeployment Interview Scheme to civil servants who are at risk of redundancy, and who meet the minimum requirements for the advertised vacancy.

Diversity and Inclusion

The Civil Service is committed to attract, retain and invest in talent wherever it is found. To learn more please see the Civil Service People Plan (opens in a new window) and the Civil Service Diversity and Inclusion Strategy (opens in a new window).
This vacancy is part of the Great Place to Work for Veterans (opens in a new window) initiative.
The Civil Service welcomes applications from people who have recently left prison or have an unspent conviction. Read more about prison leaver recruitment (opens in new window).
Once this job has closed, the job advert will no longer be available. You may want to save a copy for your records.

Contact point for applicants

Job contact :

Recruitment team

Further information

We welcome applications in Welsh / Rydym yn croesawi ceisiadau yn y Gymraeg. Selection for appointment to the Civil Service is on merit, on the basis of fair and open competition, as outlined in the Civil Service Commission’s Recruitment Principles. In accordance with the Civil Service Commissioners’ Recruitment Principles, our recruitment and selection processes are underpinned by the requirement of appointment on the basis of merit by fair and open competition. If you feel your application has not been treated in accordance with the Recruitment Principles and you wish to make a complaint, you should contact [email protected] in the first instance. If you are not satisfied with the response you receive you can contact the Civil Service Commission . 

Junior Software Developer