Senior Mechanical Engineer

Brightsmith; Greater London; On-site; GBP 65,000 - 90,000; Full time

Job summary

Brightsmith in the United Kingdom is seeking a Senior Mechanical Engineer to own the mechanical design of key components within a compact energy system. You will lead from concept through prototyping and testing, turning ideas into manufacturable hardware.

You will work hands-on with Creo and 3D CAD, perform analyses, support manufacturing, and collaborate with systems engineers and suppliers to ensure scalable production.

Qualifications

• Degree in Mechanical Engineering or a related discipline.
• Strong hands-on experience in mechanical design and testing.
• Proficient CAD experience with Creo and 3D modelling.
• Experience with design for manufacture and scalable production.
• Independent worker with good communication across disciplines.

Responsibilities

• Lead mechanical design of key components in a wider energy system.
• Translate concepts to CAD, prototyping, testing and validation.
• Create 3D models, drawings and specifications.
• Ensure integration with systems engineers.
• Support prototypes with hands-on hardware.
• Perform root cause analysis of technical issues.
• Define component requirements and validation tests.
• Collaborate with manufacturing, quality and supply chain.
• Plan for mass production and scalable design.
• Assist design reviews, risk assessments and improvements.
• Liaise with suppliers and external partners.
• Own mechanical activities within a small autonomous team.

Skills

Mechanical design

3D CAD

Prototyping

Root cause analysis

Manufacturing liaison

Education

Bachelor's degree in Mechanical Engineering

Tools

Creo

FEA

Job description

This is a highly hands‑on opportunity within a small, autonomous engineering team. You’ll be responsible for turning early-stage ideas into working mechanical designs, getting involved in CAD, prototyping, testing, troubleshooting and working with manufacturing to ensure designs can ultimately be scaled for production.

We’re looking for someone who is technically strong, practical and comfortable working independently. You’ll be given an objective and expected to take ownership of working out how to achieve it, rather than simply being handed a defined task list.

Key Responsibilities – Senior Mechanical Engineer

• Lead the mechanical design and development of key components within a wider energy system
• Take designs from early-stage concepts through CAD, prototyping, testing and validation
• Develop 3D models, detailed drawings and technical specifications
• Work closely with systems engineers to ensure mechanical components integrate effectively within the wider system
• Support prototype builds and get hands‑on with physical hardware
• Diagnose technical issues and carry out root cause analysis
• Develop component requirements and support testing to validate performance and reliability
• Work closely with manufacturing, quality and supply chain teams to ensure designs are practical and manufacturable
• Consider future mass production and scalability when making design decisions
• Support technical reviews, risk assessments and design improvements
• Work with suppliers and external partners where required
• Take ownership of mechanical engineering activities within a small, highly autonomous team

Experience & Skills – Senior Mechanical Engineer

• Degree or equivalent technical background in Mechanical Engineering or a related discipline
• Strong experience in mechanical engineering, component design and system‑level mechanical design
• Proven experience taking mechanical designs from concept through to testing and validation
• Strong hands‑on CAD experience
• Practical experience with prototyping and physical hardware
• Strong problem‑solving and root cause analysis skills
• Understanding of design for manufacture and designing with future production and scalability in mind
• Comfortable working independently and taking ownership of technical workstreams
• Strong communication skills and ability to work with multiple engineering disciplines and stakeholders
• Experience in a fast‑moving or early‑stage engineering environment
• Experience with Creo, FEA, thermal analysis, manifolds/piping systems or engineering risk tools would be advantageous
• Experience within clean energy, automotive, HVAC or another complex mechanical systems environment would be beneficial

This is an excellent opportunity for a Senior/Principal Mechanical Engineer to take genuine ownership of a key area of technology development, working hands‑on within a small engineering team and helping take an early‑stage system towards production.