> Markdown version of [/jobs/ext/3268450-senior-design-engineer](https://www.wearedevelopers.com/jobs/ext/3268450-senior-design-engineer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md).

---

# Senior Design Engineer

- **Company:** J3A Recruitment
- **Location:** Bath, UK (Remote available)
- **Experience:** Expert
- **Salary:** £45,000.0 - £50,000.0
- **Contract:** Permanent contract
- **Skills:** Computer-Aided Design, Autodesk Autocad
- **Published:** September 8, 2026
- **Apply:** https://www.collegerecruiter.com/job/2840571561-senior-design-engineer

## About the Role

They've trusted us with this critical Senior Mechanical Design Engineer hire. So, if you're a mechanical design pro with water/wastewater experience and want to be part of something genuinely exciting, this one's for you., * 5+ years in senior mechanical design roles (preferably water-focused)

 * HNC/HND or Degree in Mechanical Engineering (can be flexible with qualifications - preference would be towards experience and profile)
 * Strong knowledge of chemical dosing, water quality monitoring, and mechanical systems design
 * Proficiency in 2D/3D Autodesk CAD packages
 * Experience coordinating and leading multi-disciplinary teams

## Description

You'll lead the design and delivery of complex mechanical systems within water and wastewater infrastructure projects. Think treatment plants, pumping stations, chemical dosing systems, and more.

You'll work with a team of 40+ engineers on cutting-edge, sustainable solutions, while mentoring junior staff and influencing key technical decisions.

What You'll Be Doing as the Senior Design Engineer

 * Lead mechanical design for treatment systems, pumping stations & infrastructure
 * Own projects from concept to construction
 * Develop detailed mechanical specs, surveys & system interfaces
 * Produce and challenge designs to drive innovation and continuous improvement
 * Mentor junior engineers and support the wider team
 * Attend client meetings, present technical designs, and support site visits
 * Collaborate with commercial and PM teams for successful delivery


## Related Videos

- [Why Your Best Mediors Never Become Seniors (And How to Fix It)](https://www.wearedevelopers.com/videos/2108-why-your-best-mediors-never-become-seniors-and-how-to-fix-it)
- [Your next 10x engineer isn't in your city. Refactor accordingly.](https://www.wearedevelopers.com/videos/100103-your-next-10x-engineer-isn-t-in-your-city-refactor-accordingly)
- [What If We Designed Employee Experience Like a Customer Journey?](https://www.wearedevelopers.com/videos/1824-what-if-we-designed-employee-experience-like-a-customer-journey)

## Related Articles

- [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs)
- [Where To Find Software Engineering Jobs](https://www.wearedevelopers.com/magazine/396-where-to-find-software-engineering-jobs)
- [Data Engineer Salary UK](https://www.wearedevelopers.com/magazine/253-data-engineer-salary-uk)
- [Find a Developer Job: 12 Best Job Sites For Developers](https://www.wearedevelopers.com/magazine/165-find-a-developer-job-12-best-job-sites-for-developers)
- [Where to Find Entry-Level Software Engineering Jobs](https://www.wearedevelopers.com/magazine/397-where-to-find-entry-level-software-engineering-jobs)
- [The Ultimate Software Engineer Career Path Guide for 2023](https://www.wearedevelopers.com/magazine/146-the-ultimate-software-engineer-career-path-guide-for-2023)