Average Software Engineer salary in the UK

Principal Software Engineer Location: Portsmouth with a hybrid working ( 3 days in the office)Salary: From £60K - £80K, depending on experience, many benefits including pension, 25 days holiday and life insurance.Our client is a growing software and data science consultancy, The team is dedicated to delivering high-quality, end-to-end software and data science services. This role offers the opportunity to work across multiple sectors, including defence, energy, transport, and health, and contribute to the development of cutting-edge solutions.Our client is looking for Principal C++ Software Engineers with a range of levels of experience including designing, delivering software applications, and leading teams.As a Principal Software Engineer, you will play a major role in developing code in the Software Modelling and Simulation, autonomy, and geospatial fields, along with providing key advice around innovation and new techniques to stakeholders. You will be designing solutions for complex challenges that will meet and exceed user requirements.Responsibilities re role of Principal Software Engineer will include:Designing, developing and delivering software solutions using a large range of techniques, including Wargames, Modelling and Simulation, Robotic and Autonomous systems, Digital Twins and Synthetic Environments.Applying mathematical and computational methods to tackle real world problems, applying tools and techniques, and developing novel approaches where required.Delivering technical consulting projects and products, with the opportunity to lead some of theseBuilding new relationships and maintaining current customer relationships.Qualifications/Experience required re role of Principal Software Engineer include:Essential:At least 15 years’ experience in designing and implementing performant software applications.Apply mathematical principles or statistical approaches to solve problems in scientific or applied fields.Proficient in C/C++ or C# and Python.Demonstratable skills in stakeholder management including influencing, negotiating and conflict management.Demonstratable experience and capability in writing proposals and coordinating bid management activity.Experience of line management and enabling people to perform.Extensive experience with a range of software modelling and simulation techniques.Experience in using cases and project data context to determine specifications and requirements.Experience in one or more of the following technical disciplines:Videogame engine technology (e.g. Unreal Engine, Godot)Entity or Event based SimulationRobotics and Autonomous SystemsUnderstand varied codebases and be confident in making changes to large projects.Understand performance and hardware constraints.Building customer and stakeholder relationships.Supporting and leading authoring of technical reports and presenting to customers.Be willing to travel across UK and comfortable to work at client sites for periods.Desirable:Experience working with Defence Digital, DE&S, Dstl, Frontline Commands or UK Defence industry.The ideal candidate will be educated to degree level or have equivalent relevant experience. We’d love you to bring a strong STEM / computing background.Proficient in MS Office, especially Excel, PowerPoint, Word.Candidates must have an existing right to live and work in the UK.Ideally looking for candidates with current SC or DV Security Clearance. Keywords – C++, C, Python, Defence, Modelling, Simulation, Robotics, Synthetic Environment, Autonomous Systems, Requirements Management, Unreal Engine, Godot, Simulation, Bids, Proposals, C++ Software Engineer.Principal Software Engineer

A software-led business is looking for a Software Architect to bring structure, coherence and long-term direction to a complex platform environment. This is an individual contributor role for someone who can work across engineering, product, infrastructure and security teams to shape architectural standards, guide technical decisions and support wider platform consolidation.Software Architect Uxbridge, West London - Hybrid, 2 days per week in the office Up to £120,000 + benefitsThe business has a broad technology landscape, with multiple systems, services, integrations and data capabilities that need to evolve in a more consistent, scalable and maintainable way. Your role will be to help define what good looks like, create clearer architectural boundaries and support engineering teams in making decisions that work both now and in the future.What you'll be doing You'll provide architectural leadership across software platforms, services, integrations and cloud-based systems.This will include:Defining architectural principles, standards and target-state designsSupporting platform consolidation and reducing unnecessary duplicationReviewing significant technical changes and guiding solution designHelping define clear service boundaries, ownership models and integration patternsEnsuring security, resilience, observability and scalability are considered from the outsetIdentifying architectural risks, technical debt and platform constraintsWorking closely with engineering and product leadership on major technical decisionsInfluencing engineering teams through technical credibility, clarity and pragmatic decision-making This is not a hands-on development role day to day. It is primarily focused on architecture, design review, technical direction and influencing through engineering teams.What we're looking for You'll need a strong background in software architecture, ideally within a SaaS, product or platform-led environment. You should be comfortable working across complex systems and helping teams move towards a more coherent platform architecture.Essential experience includes:Software architecture across complex platforms or distributed systemsSaaS, product or platform architecture experienceAPI, integration and service design experienceCloud-based architecture, ideally including AzureSecurity-by-design, resilience, scalability and operational qualityStrong communication skills with both technical and non-technical stakeholdersThe ability to influence technical direction without relying on direct line managementExperience of platform consolidation would be particularly useful.Why this role?This is a good fit for someone who enjoys solving structural technology problems rather than owning a single product or system. You'll be working at platform level, helping the business simplify its architecture, improve ownership and create standards that engineering teams can actually use. The role suits someone pragmatic, credible and senior enough to balance long-term architecture with real-world delivery constraints.Interested? Apply now or contact Chris Lynes at Spectrum IT Recruitment.Spectrum IT Recruitment (South) Limited is acting as an Employment Agency in relation to this vacancy.

Software Engineer Hybrid working 3 days in officeUp to 90KBased in Borehamwood, full time roleOverview On behalf of our client, an award-winning UK-based healthcare technology company, we are hiring for a Backend Software Engineer. The organisation develops AI-powered voice solutions for medical practices and clinics, automating patient calls, managing appointment bookings, and supporting medical triage through conversational AI.Role Description We are seeking an experienced Backend Software Engineer to help build and scale the core infrastructure behind an AI voice platform. You will work on real-time systems that manage high volumes of concurrent interactions, integrate with healthcare systems, and orchestrate AI-driven workflows.Key ResponsibilitiesDesign and develop scalable backend services for real-time voice AI systemsBuild APIs and services that power conversational workflows and integrationsWork on event-driven architectures handling telephony, streaming, and AI responsesIntegrate with third-party systems and external platformsOptimise system performance, reliability, and latencyContribute to architectural decisions, infrastructure design, and engineering best practicesRequirementsStrong experience building backend systems with Node.js (5+ years)Proven experience designing scalable APIs and distributed systemsFamiliarity with real-time or event-driven architectures (e.g. WebSockets, queues, streaming)Experience with cloud platforms (AWS preferred)Solid understanding of databases (SQL and/or NoSQL)Experience integrating with external APIs and third-party servicesStrong problem-solving skills and ability to thrive in a fast-paced environmentDesirable SkillsExperience with voice or telephony systems (e.g. SIP, WebRTC)Exposure to AI systems, LLMs, or conversational workflowsExperience in healthcare or regulated environmentsKnowledge of infrastructure-as-code (e.g. Terraform, CDK)Experience with observability, monitoring, and scaling production systems