Principal Developer within Digital & Data Transformation

ENGINE Transformation (ET) creates, accelerates, designs and builds the future for our clients. We combine the creativity of an agency with the robustness of a consultancy and technical agility of a start-up. Built on Research. Driven by Design. Fuelled by Data. Powered by Technology.

We Transform organisations through a world class research, design, data and technology culture, delivering better digital and multichannel experiences. We combine depth of expertise with a breadth of experience, working across both public and private sector to delivery tangible outcomes in partnership with our clients, built on a philosophy of transparency, collaboration and agility.

Our services include strategy & innovation, market & customer research, change & delivery, service design, data driven transformation and solutions, technology strategy and data and software engineering.

We are proud to work for clients as diverse as Sky, Dominos, Santander, Holland & Barrett, BMW, Ministry of Justice, Department for International Trade, Defra and Home Office. We have offices in London, Manchester, Sydney & Melbourne.

We are part of ENGINE Group’s UK operations and form one of three business pillars, alongside our colleagues in Creative (advertising and marketing) and Communications (PR). In total, ENGINE UK has over 800 staff in our London and Manchester offices.

Find out more at:


The Role: Principal Developer

What we need:

We’re looking for a dynamic Principal Developer who will report into the Director of Software Development. As a Principal Developer you will be:

  • Expert in a variety of technical areas
  • Using the expertise and working across disciplines to help multiple teams work effectively
  • Developing capability by facilitating internal mobility, shaping career paths, recruiting talent and facilitating collaboration
  • Identifying, testing and championing the adoption of emerging technologies

You will influence teams to adopt best-practice engineering principles based upon both our and the client’s agreed standards. You will also help to build our wider software and data engineering capability, inputting into strategy and standards and helping other developers reach their potential.


As an engineer: We are looking for expertise in the following:

  • One or more of the following: Java 8+, NodeJS, JavaScript (ES6), C#, .NET
  • Relevant development frameworks e.g. Spring Boot, Express, React, React Native, Angular
  • Docker and Kubernetes
  • One or more of the following: AWS, Azure, GCP
  • SQL and NoSQL solutions and when to use them
  • Writing clean code and clear tests
  • DevOps principles for continuous delivery
  • Drawing architectural diagrams to evolve and communicate design


As a leader: We are looking for experience in the following areas:

  • Building trust with stakeholders and foster high-performing teams
  • Coordinating business, resourcing, engineering, architecture and infrastructure needs
  • Designing maintainable, scalable and secure services
  • Enabling delivery without incurring undue technical debt
  • Mentoring and managing other senior software engineers
  • Working with other Principal Developers, the Director of Software Development and others to evolve Engine Transformation’s engineering strategy
  • Trouble shooting



  • Define and assemble development teams for client projects
  • Define ways of working in the context of specific project engagements
  • Lead the design of solutions and technical architectures
  • Participate in the selection of technologies for projects
  • Oversee the work of development teams, reviewing work, providing feedback and mentoring team members
  • Taking overall accountability for the quality of the development work on the projects you are assigned to
  • Participate in the ongoing development of our technology practice, including recruitment and development of staff and development of working practices
  • Engage in pre-sales activity


Key skills:

Development Management:

  • Recruitment
  • Development planning
  • Coaching and mentoring 
  • Quality management
  • Appreciation of BA and QA disciplines
  • Experience of large project environments

Technical Architecture Development:

  • Design of application architectures
  • Provision of guidance to teams on technical design
  • Deep understanding of architectural and development practices such as microservices, 12-factor apps, cloud-native and DDD

Development skills:

  • Ability to develop and mentor in at least two languages that we use (Java, Node, JavaScript, Python, Ruby)
  • Knowledge of relevant frameworks and modern database platforms
  • Solid experience of Continuous Deployment with hands on experience using and configuring DevOps components
  • Strong leadership skills with a passion for helping and inspiring others to achieve their best
  • Clear presentation skills
  • Ability to work under pressure 
  • Pro-active and willing to suggest and drive through improvements


We like people who are:

  • Enthusiastic about what they do, and a delight to work with
  • Motivated and full of ideas
  • Data and technology fanatics, who can show an interest in and understanding of recent trends and the benefits they could bring
  • Passionate about working within data, digital and technology and with the drive and determination to continually improve
  • Able to build successful relationships to establish credibility


Our culture is built on:

  • Being one team; we work for and with each other with respect and positive intent; when the going is tough, we support not blame each other
  • We aim high and are ambitious; we bring the energy and positivity
  • We are curious and embrace new ideas and different perspectives, generous with our time and with each other
  • We are not afraid to fail, we learn from our failures, turning them into our future successes
  • We deliver quality in everything we do; we are open and honest with each other and our clients


Our benefits include:

  • Holiday entitlement, 28 days with the option to buy/sell up to 5 days
  • Day off (on or in the week of) your birthday
  • Pension eligibility, up to 5% matched contributions
  • Healthcare eligibility, private healthcare with Vitality, option to buy discounted family cover
  • Cycle to work scheme
  • Gym discounts
  • Regular social events/activities
  • Life Insurance

If this sounds like you, please get in touch to discuss in more detail.