Lead Full Stack Systems Developer

Penguin Recruitment Ltd; Kings Langley; On-site; GBP 75,000 - 85,000; Full time

Job summary

A leading environmental technology firm in the UK is seeking a Senior Full Stack Systems Developer to take ownership of advanced cloud-based products. The role involves guiding the full software lifecycle, mentoring developers, and working with cross-functional teams to shape innovative solutions. The ideal candidate will have expertise in Java middleware, security, and relevant technologies. Competitive salary of £75,000-£85,000 plus benefits.

Benefits

Private healthcare

Strong pension scheme

Generous holiday allowance

Electric vehicle salary sacrifice programme

Qualifications

• Experience in managing full software lifecycles across complex enterprise systems.
• Essential experience with Java enterprise middleware.
• Experience in designing, developing, testing, and deploying software solutions.

Responsibilities

• Ownership of end-to-end development for advanced cloud-based products.
• Guide the full software lifecycle from architecture to deployment.
• Mentor developers and influence technical direction.

Skills

Managing full software lifecycles

Java enterprise middleware

Designing software solutions

Security, databases, networking

Docker

REST APIs

Deep learning frameworks

Mentoring or leading technical teams

Job description

Senior Full Stack Systems Developer

Reference: BY128941

Hemel Hempstead

£75,000 – £85,000

Join a pioneering organisation at the forefront of environmental technology. For over ten years, this company has been transforming how the UK monitors and understands environmental change, building integrated, data-driven ecosystems that deliver real-time insights. As they continue to expand, they’re looking for a Lead Full Stack Systems Developer to lead a talented technical team and play a key role in shaping the next generation of intelligent digital platforms.

What’s on offer for the right Lead Full Stack Systems Developer:

• Salary: £75,000-£85,000 plus performance-related bonus, with clear scope for growth

• Benefits: Private healthcare, strong pension scheme, generous holiday allowance, and an electric vehicle salary sacrifice programme

• Culture: A forward-thinking, collaborative environment that values innovation, impact, and professional development

The Lead Full Stack Systems Developer role:

As Senior Full Stack Systems Developer, you’ll take ownership of end-to-end development for advanced cloud-based products. You’ll guide the full software lifecycle—from architecture and design to deployment—ensuring systems are scalable, secure, and high-performing. The position involves mentoring developers, influencing technical direction, and partnering with cross-functional teams to deliver cutting-edge enterprise solutions.

About the Lead Full Stack Systems Developer:

We’re seeking someone who brings both technical depth and leadership skills, with experience in:

• Managing full software lifecycles across complex enterprise systems
• Java enterprise middleware (essential)
• Designing, developing, testing, and deploying software solutions
• security, databases, networking, and HCI
• Technologies such as Docker, REST APIs, MQTT, and deep learning frameworks
• Prior exposure to environmental monitoring systems (advantageous)
• Proven ability to mentor or lead technical teams

This is a rare opportunity to apply your full stack expertise to technology that makes a measurable difference to the planet.