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Jacobs Principal Developer in London, United Kingdom

Critical Mission Solutions

Your mission is our mission.

We’re invested in you and your success. Everything we do – whether Aerospace, Defense, Intelligence, Information Technology, Cybersecurity, Nuclear, Automotive, or Telecommunications – is more than just a project. It’s our challenge as human beings, too. That’s why we bring a thoughtful and collaborative approach to every one of our partnerships.

It’s our promise to challenge the status quo as we redefine how to solve the world’s greatest challenges, and transform big ideas into intelligent solutions for a more connected, sustainable world.

Design your career with a company that inspires and empowers you to deliver your best work so you can evolve, grow and succeed –today and into tomorrow.

Our People & Places Solutions business – reinforces our drive to improve the lives of people everywhere and epitomizes the “why” of what we do – the tremendous positive impact and value our solutions bring to our communities and society as a whole. From facilities delivering life-saving therapies and ensuring clean water to enabling the connection of people through all modes of transportation and providing access to technology – we’re integrating a multitude of these solution elements to build the smart environments of tomorrow.

Start your Jacobs career with a company that inspires and empowers you to deliver your best work so you can evolve, grow and succeed – today and into tomorrow.

Your Impact:

You will be a critical member of our Digital team who will work alongside our world class engineering experts to build and run a huge range of products that codify engineering knowledge and really make a difference to the world.

Our software has been used to design major infrastructure projects, manage the most complex networks (such as water supply and treatment), drive critical engineering workflows and beyond. This is a genuinely exciting opportunity for the right candidate.

Your Impact

We’re passionate about building software that solves problems. In Jacobs we’re proud to solve problems that matter to society, from helping NASA go to Mars to delivering tomorrow’s infrastructure, smart cities and beyond.

You will be a part of Jacobs Digital who exist alongside an extensive portfolio of projects working with major clients across all sectors; an exciting boutique working in new ways with the support of wider Jacobs.

Digital is responsible for incubating, building and running new products and solutions for our customers - meaning you are joining a team of fast-moving problem solvers working on varied and interesting challenges. Our products range from established software to nascent ideas sparking into life; leveraging Lean Start-up to rapidly invest and incubate new products. We are a diverse team of technical experts from a range of backgrounds; you don’t need to come from an engineering background to succeed here.

The team is currently experiencing unprecedented growth and success. We are looking for a Principal Developer to join and help steer our exciting journey.

Role Description

Principal Developer is a senior role within the software development team, reporting directly to the Divisional Director for software development. You are an expert who will lead one or more of our products from a technical perspective working with a squad(s) of capable developers, data scientists, designers and beyond.

You will be a technical leader continuously striving to drive best practice and embody digital cultures such as Agile and Lean Start-up.

The successful applicant will become a senior part of a respected and hardworking team, providing support to clients and other team members alike. We will look to you to assess new ideas and help other products transition through the development lifecycle from alpha, through beta to live. Whilst the role is in the Development team the successful candidate will also work closely with the Data Analytics, Sales and Operations teams, gaining good knowledge and experience across a number of different skills. Applicants should be keen, hardworking and have excellent technical skills and background. There are significant advancement and leadership progression opportunities.

What we're Offering

This is a real greenfield development opportunity; you’ll be working on triaging ‘new stuff’, as well as leading the implementation of new systems in a number of really critical areas. This work will be delivered in an agile manner, working with multi-disciplinary teams and across a variety of business areas. As a Principal Developer you’ll take ownership over the products, features and services your team looks after, being curious at heart with a desire to make things better. You’ll prioritise the focus on being one team with a passion for nurturing, coaching and sharing your knowledge with others whilst ensuring high quality code is delivered in line with project goals and delivery cycles and thrive using agile methods.


  • Design and development of new technical solutions for our products

  • Developing, maintaining and supporting our existing SaaS applications

  • Driving best practice in development ways of working such as agile

  • Working with varied stakeholders to draw out opportunities and generate new ideas; working autonomously to shape problems and solutions from a technical perspective

  • Supporting and mentoring junior team members

Here’s What You’ll Need:

  • 5+ years proven professional experience with ASP.NET / C#

  • Advanced/expert experience of T-SQL / SQL Server

  • Advanced practical HTML, JavaScript, JQuery, CSS, Responsive UI design

  • Able to work under pressure and to tight deadlines

  • Communicating and liaising effectively with colleagues, driving best practice implementation around agile and beyond

  • Flexible and able to adapt to new languages and technologies

  • Excellent communication and teamwork skills

  • Exemplary focus, ambition and attention to detail

  • Analytical mind who can bring clarity to difficult situations

  • Have initiative and the ability to work autonomously

Why Jacobs?

We clear the way for inventive thinking so you have the support, means and space to deliver the boldest solutions for the extraordinary and every day. Jacobs. A world where you can.

Our Culture

We’re invested in you and your success. Our values stand on a foundation of safety, integrity, inclusion and diversity. We put people at the heart of our business and we truly believe that by supporting one another through our culture of caring, we all succeed. We value positive mental health and a sense of belonging for all employees.

We aim to make inclusion and diversity core attributes of our identity, embedded in all our employment and business practices in all locations. We know that if we are inclusive, we’re more connected, and if we are diverse, we’re more creative.


At Jacobs, we’re challenging today to reinvent tomorrow by solving the world’s most critical problems for thriving cities, resilient environments, mission-critical outcomes, operational advancement, scientific discovery and cutting-edge manufacturing, turning abstract ideas into realities that transform the world for good. With $13 billion in revenue and a talent force of more than 55,000, Jacobs provides a full spectrum of professional services including consulting, technical, scientific and project delivery for the government and private sector.