Frontend Developer

🔒 Confidential Employer
Posted 21 March 2026
LOCATION
Not specified
TYPE
Full-time
LEVEL
Mid-Senior level
CATEGORY
Technology
This employer holds a UK Home Office sponsor license — sponsorship for this specific role is at the employer’s discretion

SKILLS

HTML5 CSS3 AJAX REST JSON Automated Testing Agile JavaScript

FULL DESCRIPTION

Mercator is seeking a dynamic, forward-thinking Frontend Developer with excellent communication skills who can help Mercator in its continued transformation. You will be open-minded, happy to work on your own or as part of a team and want to learn new technologies and promote best practice.

What we’re looking for

Mercator is seeking a dynamic, forward-thinking Frontend Developer with excellent communication skills who can help Mercator in its continued transformation. You will be open-minded, happy to work on your own or as part of a team and want to learn new technologies and promote best practice.

Job type

Full time, permanent. We encourage those who may need a more agile approach to the structure of their working day to apply; we are always willing to discuss flexible options where we can.

Location

You’ll be expected to travel to our customer’s site and potentially sites UK wide; working from client/office/home locations as appropriate.

As a Front­end developer you will:

  • Build, deploy and operate outstanding digital services within an agile environment that meet well defined user needs
  • Deliver application designs that meet web standards, ensuring that key elements are built in from the outset
  • Collaborate with Design Specialists to translate designs into high quality websites, apps, HTML emails, and interactive experiences
  • Contribute to the development and continual enhancement of products
  • Partner with Product Managers, Design Specialists, Business Analysts and Software Developers to facilitate a consistent user experience
  • Participate in the rapid development of user driven digital prototypes
  • Work in cross functional teams to write and test production quality, sustainable code for world class user interfaces for new and existing systems
  • Ensure that new and updated digital services are thoroughly tested for accessibility and can be maintained and improved over the long term.
  • Provide mentorship and/or line management for more junior Frontend Developers where necessary
  • Contribute to a culture of continual improvement in which key systems “owned” by your digital service team are regularly analysed, maintained and improved
  • Contribute to a robust automated test suite to work in a continuous integration environment
  • Become involved in the wider web development community (outside of Mercator), building relationships with other Frontend Developers and identifying best practices we can adopt
  • Sharing knowledge of tools and techniques with technical and non-technical team members within Mercator

Knowledge/experience Skills

You will need:

  • Use and implementation of modern front-end web technologies such as HTML5, CSS3, AJAX, REST, JSON
  • Good understanding of web/agile technologies & protocols
  • Demonstrable experience in automated testing solutions
  • Proven problem solving skills: able to logically break down a problem into smaller manageable parts to solve
  • Proven ability to communicate technical concepts to a non-technical audience
  • Proven ability to quickly research and learn new programming tools and techniques
  • Demonstrable knowledge of relational and non-relational database systems
  • Experience of programming languages such as Python, Ruby, C#
  • Experience developing and using web-based APIs (especially HTTP REST-based APIs)
  • Experience with web frameworks such as Django, Ruby on Rails, Play Framework, Google Guice, Spring, MVC
  • Experience with open source solutions and community, including Linux system administration and configuration management skills including Linux experience
  • Experience with automated testing and continuous integration tools such as Jenkins, junit
  • Experience using and deploying on cloud based platforms
  • Experience working on technical projects within an agile team
  • Configuration management skills
  • Confluence and JIRA
  • Experience presenting work at user groups and conferences
  • Experience of building and scaling high-traffic websites
  • Understanding of the use of responsive web design
  • Experience of handling large data sets and scaling their handling and storage
  • Understanding of web security best practices and security application design such as OWASP top 10
  • Knowledge of the use of version control systems such as git or subversion

In return you’ll receive

  • Above market rate (dependent on experience)
  • 25 days holiday per year (plus bank holidays and your birthday off)
  • Company pension
  • Group life cover
  • Training budget
  • Enhanced maternity/paternity package
  • Employee Assistance Programme
  • 2 days paid volunteering days
  • We also offer an electric vehicle scheme and cycle to work scheme

*Applicants must have the right to work in the UK and the ability to pass BPSS vetting

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