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Job Description

Job Description:

We are seeking a technically proficient Full Stack Web Senior Developer to lead the ownership and delivery of our digital solutions through the design and implementation of innovative web applications that enhance our data digital capabilities across various business functions, including Marketing, Supply Chain, Sales, and Customer Engagement.

This role is transformation-funded and therefore has an expected end date of 31st December 2026

What are we looking for?

  • A technical leader with 10+ years of hands-on experience in full stack web development, proficient in both front-end and back-end technologies, including HTML, CSS, JavaScript, React, Node.js, and RESTful APIs.

  • Strong experience with cloud platforms such as AWS, Azure, or GCP, and familiarity with containerization technologies like Docker and orchestration tools like Kubernetes.

  • Proven experience in implementing DevOps practices, including CI/CD pipelines, automated testing, and version control systems (e.g., Git).

  • Demonstrated leadership skills in managing development teams, delivering high-quality web applications, and driving best practices in software development.

  • Demonstrate excellent communication and interpersonal skills with the ability to explain complex technical concepts to non-technical stakeholders.

What will be your key responsibilities?

  • Lead an agile team of developers, fostering their skill development and driving innovation through best practices in web development.

  • Take technical ownership of web development projects, ensuring alignment with business objectives and delivering high-quality solutions on time.

  • Collaborate with UX/UI designers and product managers to create user-friendly and visually appealing web applications that meet user needs.

  • Facilitate the design and architecture of scalable web applications, ensuring performance, security, and maintainability.

  • Mentor junior developers, providing guidance on coding standards, design patterns, and effective problem-solving techniques.

  • Work closely with cross-functional teams including stakeholders, business analysts, QA, and infrastructure teams to ensure seamless project execution.

  • Collaborate with internal teams to evolve shared libraries and frameworks, contributing improvements and reusable components


What can you expect from Mars?
Work with like-minded and talented Associates, all guided by The Five Principles.
Join a purpose driven company, where we’re striving to build the world we want tomorrow, today.
Best-in-class learning and development support from day one, including access to our in-house Mars University.
An industry competitive salary and benefits package, including company bonus.

#TBDDT

Mars is an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability status, protected veteran status, or any other characteristic protected by law. If you need assistance or an accommodation during the application process because of a disability, it is available upon request. The company is pleased to provide such assistance, and no applicant will be penalized as a result of such a request.

Company benefits

Open to part-time employees
Open to job sharing
Open to compressed hours
Sabbaticals
Enhanced maternity leave – 26 weeks at 90% pay
Enhanced paternity leave – 26 weeks at 90% pay
24 days annual leave + bank holidays
“Pawternity” leave
Pregnancy loss leave
Bank holiday swaps
Shared parental leave
Adoption leave
Family health insurance
Pregnancy support
Neo-natal leave
Faith rooms
Meditation space
Dog friendly office
Dog friendly co-working space
Annual bonus
Employee discounts
Cinema discounts
Referral bonus
Joining bonus
Cycle to work scheme
Electric Car Salary Sacrifice
Enhanced pension match/contribution
Theme park discounts
Lunch and learns
In house training
LinkedIn learning license
Studying sabbaticals
Open to part time work for some roles

Working at Mars UK

Company employees

4,000 In the UK

Gender diversity (male:female)

57:43

Currently Hiring Countries

Denmark

France

Netherlands

United Kingdom

United States

Office Locations

Awards & Achievements

1st – Family Friendly

1st – Family Friendly

Flexa awards 2025
2nd – Pet Friendly

2nd – Pet Friendly

Flexa awards 2025
Flexible

Flexible

Flexa awards 2025
Diversity and Inclusion

Diversity and Inclusion

Flexa awards 2025
Work-Life Balance

Work-Life Balance

Flexa awards 2025
Career Progression

Career Progression

Flexa awards 2025
Culture

Culture

Flexa awards 2025
Benefits

Benefits

Flexa awards 2025
1st – Large companies

1st – Large companies

Flexa100 2024
Consumer Goods

Consumer Goods

Industry awards 2023
3rd – Large companies

3rd – Large companies

Flexa100 2023
Retail & Ecommerce

Retail & Ecommerce

Industry awards 2022
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