Digital and technology skills


Writing, adapting and maintaining code to create and improve digital services.

Development in digital services requires code to be created and constantly improved, with a constant focus on how it will be used. Identifying new tools and techniques and removing technical bottlenecks are vital to successful development and continuous service improvement.

Some relevant roles: technical architects, developers

Development lifecycle

Understand the differences and synergies between front-end design and back-end development.

Programming languages

Knowing a language

Having an aptitude for programming and being confident in at least 1 language for both front-end and server-side uses (eg, Python, Ruby, PERL, Java, Scala or PHP).

Applying programming paradigms

This involves:

  • being confident in the core concepts of major programming paradigms (eg object-oriented programming)
  • applying these to new and developing technologies and languages

Understanding data formats and architectural styles

Understanding and using data formats (eg, XML and JSON) and architectural styles (eg, REST).

Continuous integration and improvement

Releasing code frequently

This involves:

  • understanding the concept of continuous integration
  • being confident in releasing code as it is ready for deployment

Refining code

This involves:

  • analysing and refining code to improve performance
  • continually improving services to make them ‘simpler, faster and clearer’
  • visually inspecting code for quality (both your own code or the code of others in the team)

Progressive enhancement

This involves:

  • creating code on the concept of progressive enhancement
  • creating code for the most basic functionality that works on a baseline of devices before enhancing services so that they are platform and device agnostic
  • understanding the features of various web browsers
  • being able to create code that is compatible with a wide variety of browsers (and being able to test that compatibility)


This involves:

  • prototyping designs and layouts
  • being able to adapt those designs based on user research

Modular coding

Creating code in multiple layers, so that it is modular and potentially re-usable, to enable more robust services to be created.

Reusing code

Knowing when to reuse code

Understanding the advantages and risks of using third-party code related to open-source technologies.

Knowing how to reuse code

Knowing the options for reusing code, such as:

  • copying the code into your project
  • pulling in third party dependencies automatically using a dependency management tool
  • forking the third party code into a separate repository that you manage

Decreasing risks of reusing code

Decreasing the risks of reusing code by using:

  • dependency management tools (eg Maven or Bundler)
  • commercial tools (eg Gemnasium or Sonatype CLM)
  • mailing lists (eg RedHat or CERT-UK)

Developing to avoid security exploits

Writing secure code

This involves:

  • understanding how security procedures and standards affect how you code
  • writing code that’s secure

Understanding security attack vectors

This involves:

  • understanding common security attack vectors (eg JavaScript code exploits)
  • making sure these loopholes are closed when programming

Risk management

This involves:

  • having an understanding of the risks of developing in an agile environment
  • setting expectations about the length of time it might take for services to become minimal viable products
  • managing those expectations

Secure-oriented architecture

Having a strong understanding of service-oriented architecture and how it supports server-side web applications, as the government moves towards more interdependent services as part of the digital transformation.

Server-based operating systems

This involves:

  • using server-based operating systems comfortably
  • maintaining those application environments
  • having a strong understanding of the server environment you work in


Assistive technologies and accessible services

This involves:

  • developing services that are accessible by default (which includes not only the visual elements but also the code mark-up, format and page structure)
  • ensuring the service is usable with assistive technologies such as screen readers, screen magnifiers and speech recognition software

Web standards and the Equalities Act

This involves:

  • creating layouts and interfaces that meet web standards to ensure accessibility and compatibility for as many end users as possible (as a starting point, services should aim to meet Level AA of the Web Content Accessibility Guidelines (WCAG) 2.0)
  • understanding individual and organisation-wide duties under the Equalities Act 2010

Using different environments

Assessing the environmental needs of a project in terms of development needs and a live service need (eg environments might include performance testing, staging and integration).


Testing and debugging tools

This involves:

  • using testing and debugging tools (eg Chrome Dev tools and Firebug) to support the development and improvement of digital services
  • performance testing to assess the stability and responsiveness of a service

Testing suites

Building useful, robust, automated testing suites, and preview and staging areas, to support a continuous deployment environment.

Scaling, hosting and applications

Understanding how to scale an application or its hosting environment to support variation in demand.

Application programming interfaces (APIs)

This involves understanding:

Designing and implementing database schemas

Designing and implementing database schemas which group information in a logical order.

Version control

Setting up and using a version control system and code management technologies for collaboration, review and management of projects.

Open source technologies

This involves knowing:

  • what open source technologies are available to help develop a service
  • when it is appropriate to use them

Learning resources:

The Service Design Manual covers developer skills - what developers do and what to look for when recruiting. It also includes a section on managing software dependencies, which looks at the opportunities and challenges for developers when using third party libraries and frameworks.