Senior PLC Software Engineer

Job in Waverley, Cranleigh, Surrey County, GU6, England, UK

Listing for: Cranleigh Scientific Ltd

Full Time position
Listed on 2026-05-15

Job specializations:

Engineering
Software Engineer, Systems Engineer

Salary/Wage Range or Industry Benchmark: 125000 - 150000 GBP Yearly GBP 125000.00 150000.00 YEAR

Location: Waverley

Senior PLC Software Engineer – Cranleigh, Surrey (Hybrid) – Permanent, Full-time – Salary: £ Competitive + Benefits:
Bonus scheme, Private healthcare, Share Options, Pension contribution, 25 days holiday + bank holidays, Flexible hours, Life assurance

What you’ll be doing

Designing and developing PLC software for ammonia cracking systems
Programming PLCs (Siemens S7 / TIA Portal preferred, others considered)
Working within an existing system architecture, with increasing input over time
Defining and improving software development processes and standards
Producing structured, maintainable code (IEC 61131-3)
Supporting software verification and validation (including simulation where applicable)
Integrating PLC systems with wider control architecture (HMI, SCADA, instrumentation)
Supporting and leading commissioning activities, fault finding and debugging on live systems
Working closely with multidisciplinary teams across mechanical, electrical and systems engineering
Supporting data acquisition and system connectivity where required

What we’re looking for

Proven experience in industrial automation within Chemical processing or Manufacturing environments.
Strong PLC programming experience (Siemens S7 ideal, others considered)
Experience across the full lifecycle: design, development, testing and commissioning
Strong fault finding and on-site debugging capability
Experience working on complex engineered or process systems
Ability to bring structure and rigour to software development processes

Desirable

Experience with simulation or software verification environments.
Exposure to process systems, energy systems or similar technologies.
Understanding of industrial communication protocols.

Why apply

Work on cutting-edge hydrogen and ammonia energy technology.
Be part of scaling a novel technology from prototype to commercial deployment.
High-impact, hands‑on engineering role.
Flexible hybrid working with real autonomy.
Opportunity to shape how control systems are developed as the business grows.

To apply or find out more

Contact Lewis at

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