Are you a Senior Software Engineer with strong C++ skills and a background in signal processing, looking for a role where your work genuinely matters? Do you want technical leadership, real project ownership, and a career you can shape yourself?We're working with a highly respected, specialist technology business based in Chertsey to find a Senior Software Engineer to join their experienced engineering team. This is a hybrid role offering genuine flexibility alongside meaningful, technically challenging work.Important: This role requires SC or DV Security Clearance eligibility. Applicants must be sole UK nationals.What you'll be doing: Leading and mentoring a team of software engineers, taking responsibility for the quality and delivery of their work Defining architectural and detailed software designs as part of broader system development Working across multi-disciplinary teams — collaborating with firmware and electronics engineers to ensure system requirements are met end-to-end Implementing and testing software in C++ to industry standards across Linux and Windows platforms Applying acoustic signal processing expertise to real-world embedded and real-time applications Using structured design tools including Enterprise Architect and UML-based design methods Managing software verification and validation against contractual requirement sets Presenting designs to internal teams and customers at all project stages Supporting system integration, acceptance activities, and Docker-based implementationsWhat we're looking for — essential: Strong C++ development experience on Linux and/or Windows platforms Experience in acoustic signal processing or real-time embedded software Proven software team leadership — technical and interpersonal Comfortable with structured design tools, version control, and IDE environments Experience of software V&V against a formal requirement set Clear, precise technical communicator — confident presenting to customers and senior stakeholders BSc or above in Engineering, Maths, Science or equivalent experience SC or DV clearance held or eligible to obtain Full UK driving licenceNice to have: Defence, government, or highly regulated industry background Experience with Docker containers or similar Familiarity with Enterprise Architect and UMLWhat's in it for you:Up to 24 additional holiday days per year via paid overtime or TOILPrivate medical care — 50+ private clinics and hospitals nationwideChristmas closedown — most staff off 24th December to 2nd JanuaryCompetitive employer-matched pensionCompany tech — laptop, mobile and home office equipment providedSalary sacrifice schemes — bikes, tech and moreGym discounts plus onsite gym at ChertseyFlexible core hours: 09:30–12:00 & 14:00–16:00Training, upskilling and genuine career development investmentRelocation package availableThis is a role for someone who wants to lead technically, work on complex and meaningful products, and have real ownership of where their career goes.