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Full Stack Engineer Jobs in Portsmouth
Overview
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Software Developer
Leidos
Fareham
Hybrid
Mid - Senior
£47,600 - £61,000
RECENTLY POSTED
+6

Description

SOFTWARE DEVELOPER

LOCATION: Whiteley

CLEARANCE REQUIRED: This role will require attainment and maintenance of SC clearance

We are looking for an experienced Software Engineer to support the development of an ATM system. The successful candidate does not need to be familiar with ATM; on-the-job training will be provided as required.

The software engineer will work in a rapidly changing environment, delivering software of a high quality to wide range of difficult problems. They will work as part of a team performing all software development activities throughout the development life cycle. The position will require understanding and application of the software engineering standards, principles and best practices

Candidates must be a competent developer with sound technical knowledge, which will enhance the delivery of technical solutions to our customer.

You will have excellent communication skills coupled with a combination of the following:

Typical Duties:

  • Design software using functional and/or object-oriented methodologies
  • Implement software solutions and/or tools that contain logical and mathematical solutions
  • Conduct functional, unit testing and/or early system integration testing
  • Investigate problems identified during test, including problem diagnosis and resolution
  • Prepare operating instructions for the software application and/or tool
  • Document and present research findings to relevant stakeholders
  • Apply the appropriate standards, processes and principles in his/her daily activities

Required Skills:

  • Experience of developing software in C and C++
  • Experience of developing software in Ada 95
  • Knowledge of using APIs
  • Experience of developing on Real Time Operating System (RTOS) like Linux.
  • Enthusiastic self-starter with good verbal communication
  • Excellent written communication through the use of e-mail, presentations and reports
  • Comprehensive understanding of various software development methodologies
  • Knowledge of configuration management within a software engineering environment (e.g. Subversion, Git)

Desired Skills:

  • Experience of developing software in Java
  • Knowledge of infrastructure as code and container technologies (e.g. Puppet, Docker)
  • Experience of Atlassian tools (e.g. Jira, Confluence)
  • Experience with public cloud platforms (e.g. AWS)
  • Experience of scripting languages (e.g. Python)
  • Experience of systems / software design tools (e.g. Enterprise Architect, Cameo Systems Modeller)

Ensuring delivery of clean, quality code within a software development environment

Who We Are:

Leidos UK & Europe – we work to make the world safer, healthier, and more efficient through technology, engineering and science.

Leidos is a growing company delivering innovative technology and solutions focused on safeguarding critical capabilities and transformation in frontline services, our work in the United Kingdom includes addressing some of the most complex problems in defence, healthcare, government, safety and security, and transportation.

What Makes Us Different:

Purpose: you can use your passion and abilities at Leidos to keep the people you care about safe. We are at the forefront of machine learning, AI, cyber security and solutions. Using your skills in the technology frontline by helping to build a safer world.  You can inspire change.

Collaboration: having flexibility to do your job is one of our core benefits, enabling you to become part of our extraordinary team.  We have been empowering our people to work flexibly for years.  Whether you work from home, the office or on customer sites, we will give you the digital tools and the flexibility to work smarter and align your needs and ours.

People: Leidos empowers people from every background to be themselves and gives you the tools to learn new skills by enabling growth whilst developing. We believe that extraordinary people need opportunities to grow, to be inspired and to inspire others. At Leidos, we invest in technical academies, career rotations and a career development plans that enhance your future.

If you’re looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo — because the mission demands it. We’re not hiring followers. We’re recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We’re already at step 30 — and moving faster than anyone else dares.

Original Posting:

For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.

Pay Range:

£47,600.00-£61,000.00

The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.

About Leidos

Leidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovations. Headquartered in Reston, Virginia, with 47,000 global employees, Leidos reported annual revenues of approximately $16.7 billion for the fiscal year ended January 3, 2025. For more information, visit www.Leidos.com.

Pay and Benefits

Pay and benefits are fundamental to any career decision. That’s why we craft compensation packages that reflect the importance of the work we do for our customers. Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available at www.leidos.com/careers/pay-benefits.

Securing Your Data

Beware of fake employment opportunities using Leidos’ name. Leidos will never ask you to provide payment-related information during any part of the employment application process (i.e., ask you for money), nor will Leidos ever advance money as part of the hiring process (i.e., send you a check or money order before doing any work). Further, Leidos will only communicate with you through emails that are generated by the Leidos.com automated system – never from free commercial services (e.g., Gmail, Yahoo, Hotmail) or via WhatsApp, Telegram, etc. If you received an email purporting to be from Leidos that asks for payment-related information or any other personal information (e.g., about you or your previous employer), and you are concerned about its legitimacy, please make us aware immediately by emailing us at LeidosCareersFraud@leidos.com.

If you believe you are the victim of a scam, contact your local law enforcement and report the incident to the U.S. Federal Trade Commission.

Commitment to Non-Discrimination

All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws.

Software Engineer
TUV SUD Limited
Fareham
Hybrid
Junior - Mid
Private salary
RECENTLY POSTED

At T V S D we are passionate about technology. Innovations impact our daily lives in countless ways, and we are dedicated to being a part of that progress. We test, we audit, we inspect, we advise. We never stop challenging ourselves for the safety of society and its people. We breathe technology, we strive for professional excellence, and we leave a mark. We take the future into our hands. We are T V S D.

Please note this role offers Hybrid working, with the expectation of being onsite 2/3 days per week.

Role Overview

As an Innovations engineer you will be helping maintain and develop software-based solutions to business problems in a small team of full-stack software engineers. These solutions will be aimed at ensuring TUV SUD is well placed to deliver future services in a timely, efficient and competitive manner. You will be supporting and developing tools that will be used internally to support the business as we push to digitize and automate our internal processes. As part of the Innovations Team, you will liaise with various parts of the business to support existing applications and provide new and innovative software solutions for internal company usage. You will be expected to input on software requirements, software implementation and propose effective solutions.

Duties and Responsibilities

  • Writing Visual Basic/.NET software to support and update a key legacy application used across the business.
  • Writing C#/.NET software to automate manual processes and help improve efficiencies across the business.
  • Functioning as a full-stack developer, working within a small team that is delivering both front-end and back-end software.
  • Contributing to the design of Innovations projects.
  • Participating in and contributing to Innovations practices such as Agile ceremonies and trainings.
  • Automation of data collection, analysis and reporting using databases (SQL and MongoDB).
  • Code sharing within the Innovations Team to speed up development process.
  • Training for Service Line employees in areas where new software tools have been deployed by the Innovations team.
  • Produce and prove solutions in concept with working prototypes.
  • Provide regular updates on project progress.
  • Track project progress using DevOps.

Essential Criteria:

  • HND (or higher) or equivalent qualification in Engineering or equivalent experience.
  • Demonstrable professional experience in software engineering, with experience with C#, VB and .NET.
  • Experience with SQL, preferably T-SQL.
  • Experience with MongoDB.
  • Experience with both front- and back-end development.
  • Ability to develop a working software solution in a team environment from concept to finished product.
  • Team player, maintaining a high level of accuracy and attention to detail, good communication skills at all levels.
  • Self-motivated with a desire to learn new skills and make a business impact.

Desirable Criteria:

  • SQL Server experience, preferably using stored procedures.
  • Experience using Azure DevOps in an Agile team.
  • Experience with Agile ceremonies.
  • Knowledge of Radio Frequency techniques and technologies.
  • Experience with controlling RF test equipment and positional controllers.
  • Strong communication skills and ability to communicate technical problems and potential solutions clearly to non-technical staff

Further Information
T V S D in the UK offers a competitive salary and benefits package that includes a minimum of 33 days holiday entitlement (for full-time employees, including public holidays), a contributory Group Personal Pension Plan and a non-contributory Group Life Assurance Scheme. We also offer various Salary Exchange/Sacrifice schemes (buying/selling holiday, cycle to work scheme, pensions), incentive schemes and comprehensive wellbeing support (Employee Assistance Programme, Dental Scheme and Occupational Health services). Dependent on their role, employees may also be eligible for hybrid/permanent homeworking, a Company Car/Car Allowance and Private Medical Insurance.

At T V S D, we have employees from more than 100 different countries collaborating together. People of different backgrounds, skills, and pursuing different life goals. Our strength comes from these countless and varied perspectives.

We are committed to be an inclusive and diverse workplace by welcoming people of all backgrounds. We want Diversity & Inclusion (D&I) to be a foundation of our company and create an environment where all our employees can trust they will be treated with respect, regardless of gender, nationality, ethnic background, faith, beliefs, disabilities, age, sexual orientation, or identity. As such, our employees are expected to behave at all times in a manner consistent with T V S D Code of Ethics and Company values.

We firmly believe embedding D&I in the heart of what we do will inherently contribute to the success of T V S D. Click here to find out more about Diversity at T V S D.

Business System Developer - Power Platform
Crondall Energy Consultants Limited
Southampton
Hybrid
Mid - Senior
£50,000
RECENTLY POSTED

Company DescriptionCrondall Energy is an independent consultancy with 25 years of global experience supporting offshore energy projects. We provide strategic, commercial and technical expertise across the full lifecycle of floating production, subsea systems and offshore developments. Our work spans six core areas: Energy Transition, Offshore Renewables, Floating Production, Subsea & Pipelines, Business Consulting and Technology Development. We advise a wide range of stakeholdersincluding energy companies, investors and law firmshelping them manage risk and deliver successful project outcomes. With a strong focus on decarbonisation, we partner closely with offshore operators and developers to drive the energy transition and support progress toward a netzero future.

Role Description

The role has flexible working options with hybrid working of at least 3 days per week in our Southampton office.

This is a new role as Crondall Energy looks to both modernise our internal processes and develop new tools to deliver services to clients. The role is our first internal developer role and will be very hands on with development, with the successful candidate designing and developing Power Platform solutions to support our internal teams. The successful candidate will also work closely with the IT Manager to define company development processes, and assist with guidance and training as we upskill staff to work in Power Apps, Power BI and Azure.

After initial improvements to our internal management and administration tools the developer will work with our engineers directly to design and develop new tools and apps to support their work including new calculation tools, data analysis and working with the IT Manager on automation and AI capabilities.

We see this role as a key part of our strategy to modernise work and take advantage of the latest developments in Power Platform, machine learning, and data science. The successful candidate will have a leading role in shaping our development strategy and the role has the potential to evolve into further work directly with our clients, or leading a small team of developers as we expand our approach to developing in-house solutions in the future.

Role responsibilities

  • Design, develop, test, deploy, and document solutions using Power Apps and Power Automate.
  • Develop and improve SharePoint solutions (SPFx, PnP) in addition to integration with existing lists/libraries.
  • Develop and maintain integrations with Azure and other cloud services.
  • Develop solutions in line with industry best practices and following secure development principles.
  • Advise staff on possible solutions to improve workflows and increase efficiency.
  • Collaborate with internal teams to understand business processes and to gather requirements to design solutions.
  • Communicate with external developers, clients and vendors to understand requirements for integration or solution development.
  • Carrying out scoping and analysis for solutions for both internal and external clients.
  • Assist the IT Manager in producing guidance and training for internal staff on Power Platform development.
  • Assist the IT Manager in developing and maintaining the company software development lifecycle and procedures.
  • Maintain awareness of new technologies and capabilities in Power Platform and the wider Microsoft ecosystem.
  • Such other activities as Crondalls management shall reasonably request from time to time.

Person Specification

Essential

  • 3-5 years development experience in SharePoint, Power Apps and Power Automate.
  • Knowledge of development best practice and secure development principles.
  • Demonstrable experience of supporting full development lifecycle from initial design to implementation, maintenance and continuous improvement.
  • Proficient with REST APIs and integration with third party services.
  • Experience developing solutions in quality managed environments (ISO 9001).

Desirable

  • Confident working with external clients to conduct scoping and analysis for solutions.
  • Experience developing Power BI solutions.
  • Experience supporting internal staff with development projects.
  • Experience delivering training and providing mentoring to junior developers.
  • Understanding of Azure development and resources (Blob Storage, Azure Data Factory, Logic apps, AI builder, Azure Functions).
  • Experience/knowledge of other programming/scripting languages (Python, PowerShell, JavaScript preferred)
  • Database development/support experience (MS SQL).
  • Microsoft certifications or a willingness to achieve (PL-900, PL-200, PL-400)

Who we are looking for

We are looking for a confident Power Platform developer with 3-5 years experience, primarily in Power Apps and SharePoint. The successful candidate will be able to work independently to design and develop solutions in Canvas and Model Driven apps. We are particularly interested in candidates with experience producing timesheet, project tracking/management, staff management, resource planning and document management solutions. Any experience of developing engineering or mathematic apps/tools would also be a plus.

The role involves working with staff and suppliers both in-person and remotely, so strong communication skills are essential. We also plan to deliver training to staff on use of Power Platform and basic development so experience mentoring or providing training is a plus.

We respectfully request that no recruitment agencies make contact on this position.

Senior Software Engineer
Sirius Digital
Portsmouth
Hybrid
Senior
£7,000
RECENTLY POSTED

Salary: Negotiableplus benefits, pension (7% contribution), 25 days holiday & life insurance

We are looking for senior software engineers with a range of levels of experience including designing and delivering software applications.

We are a small but rapidly growing consultancy, owned by four highly experienced and recognised practitioners in UK defence consultancy. We are looking for candidates with a mix of technical expertise and interpersonal skills, able to work independently or in small teams.

The Role:

As a 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 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 these
  • Building new relationships and maintaining current customer relationships.

Expertise Required:

  • Senior Software Engineer: At least 5 years experience, including designing and delivering software applications.

About You:

We are looking for candidates who can help the company grow and can offer exciting opportunities for those with the drive to develop their own skills and those of the company. We offer competitive salaries and packages, and the opportunity for rapid advancement for the right candidates.

The successful candidate must be able to demonstrate the following attributes:

Essential

  • At least 5 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.
  • Ability to understand and describe a range of software modelling and simulation techniques.
  • Ability to analyse use 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 Simulation
  • Robotics and Autonomous Systems
  • Understand 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.
  • Wed love you to bring a strong STEM / computing background.
  • Proficient in MS Office, especially Excel, PowerPoint, Word.

Other Requirements:

  • Candidates must have an existing right to live and work in the UK.
  • Candidates will need to undergo an internal BPSS check prior to gaining site access.
  • Candidates will also need to either hold a current SC clearance or be willing and eligible to undergo a Security Clearance check (SC level) upon starting their employment with the company. To gain SC clearance you will normally need at least 5 years UK residency.
Software Engineer C++
Sirius Digital
Portsmouth
Hybrid
Junior - Mid
£7,000
RECENTLY POSTED

Software Engineer

Salary:Competitive, negotiable based on experience, plus benefits including a 7% pension contribution, 25 days holiday, and life insurance

Location:Portsmouth, hybrid working

Sirius Digital is a trusted provider of expertise in Software Engineering, Data Science, and AI, supporting clients in the defence, nuclear, space, and energy sectors. We specialise in software modelling and simulation, robotics and autonomous systems, as well as data science and engineering, delivering technical consultancy and innovative solutions.

We are seeking a Software Engineer who combines strong technical skills with problem-solving ability and effective communication. You will work independently or as part of small teams, helping Sirius Digital grow while advancing your own expertise. We offer a competitive benefits package and clear opportunities for rapid career progression.

Key Responsibilities:

  • Deliver technical consultancy projects to a high standard
  • Develop and implement software solutions across areas such as wargaming, simulation, autonomous systems, digital twins, and synthetic environments
  • Build and sustain strong client relationships
  • Apply mathematical and computational techniques to solve real-world problems, developing innovative approaches as needed

What Were Looking For:

  • Experience designing and delivering performant software applications, ideally within a technical consultancy environment
  • Knowledge of software modelling and simulation techniques
  • Ability to analyse requirements and define technical specifications
  • Experience in one or more of the following: videogame engine technology (e.g., Unreal Engine, Godot), entity or event-based simulation, robotics, and autonomous systems
  • Proficiency in C/C++, familiarity with Python, C#, Zig.
  • Willingness to learn new technologies and programming languages
  • Ability to apply mathematical or statistical methods to scientific or applied challenges
  • Confidence working with large codebases and understanding hardware/performance constraints
  • Strong interpersonal skills for client and stakeholder engagement
  • Experience preparing technical reports and presenting to customers
  • Willingness to travel within the UK and work on client sites as required

Desirable:

  • Background working with Defence Digital, DE&S, Dstl, Frontline Commands, or the UK Defence industry
  • Degree in a STEM or computing discipline, or equivalent experience
  • Proficiency with MS Office (Excel, PowerPoint, Word)

What We Offer:

  • Mentoring, internal and external training, and access to sector specialists and online learning
  • Comprehensive benefits including a 7% pension contribution, private healthcare, life assurance, additional holiday purchase options, and an electric vehicle scheme

Other Requirements:

Candidates must have an existing right to live and work in the UK.

Candidates will need to undergo an internal BPSS check prior to gaining site access.

Candidates will also need to either be willing and eligible or to undergo a Security Clearance check (SC level) or hold a current SC clearance upon starting their employment with the company. To gain SC clearance you will normally need at least 5 years UK residency.

Software Engineer
Certain Advantage
Portsmouth
Hybrid
Mid - Senior
£1 - £55
RECENTLY POSTED
+1

Software Engineer (Java)SC Clearance RequiredCertain Advantage are hiring for a Software Engineer based in Portsmouth.This role is on an initial 12-month contract and is required to be onsite 3 days a week. Your responsibilities:

  • Contribute across the full software development lifecycle, including design, development, testing, and deployment.
  • Design software solutions using UML/SysML and contribute to technical architecture within a microservices environment.
  • Develop high-quality Java applications using Spring Boot, Spring Framework and related technologies.
  • Implement and maintain RESTful web services over HTTPS within distributed systems.
  • Write and maintain automated tests, ensuring quality and reliability are built into the solution from the outset.
  • Participate in Agile ceremonies including sprint planning, estimation, reviews and retrospectives.
  • Collaborate closely with team members and wider stakeholders to design, implement and test new product features.
  • Contribute to CI/CD pipelines, source control (Git) and issue tracking tools such as Jira.
  • Ensure compliance awareness and act with integrity, supporting standards, reputation and sustainable growth.

The individual:

  • Java Core (version 8+)
  • Spring Boot, Spring Framework - Good knowledge of Developing in Spring with Hibernate
  • Good Knowledge of developing REST within HTTPS
  • Experience of developing within a microservice architecture
  • Distributed systems
  • Knowledge and use of software design patterns
  • Agile Development Processes
  • CI/CD delivery techniques
  • Source code management (we use GIT)
  • Use of Issue tracking systems (such as Jira)
  • UML/SysML using Enterprise Architect or similar
  • Ability to self-motivate and to work well within a team environment.
  • Ability to promote innovation in self and others
  • Ability to interact with internal & external stakeholders in a confident and professional manner

Does this sound like your next career move? Apply today.Working with Certain AdvantageWe go the extra mile to find the best people for the job. If you’re hunting for a role where you can make an impact and grow your career, we’ll work with you to find it.We work with businesses across the UK to find the best people in Finance, Marketing, IT and Engineering. If this job isn’t for you, head to certainadvantage.co.uk and register for job alerts and career guidance tips.

Java Software Developer
Line Up Aviation
Portsmouth
In office
Mid
£55/hour
RECENTLY POSTED
+1

On behalf of our client, we are seeking to recruit a Java Software Developer on an initial 12-month contract. As the Java Software Developer, you shall contribute to all stages of the software development lifecycle and thus have solid experience in design (particularly using UML), development (particularly using Java technologies) and test. The developer should have experience of working with microservices. Automated testing is a critical part of the project so any experience of this would be highly beneficial

Role: Java Software Developer
Pay: 55 per hour Via Umbrella
Location: Portsmouth
Contract: Monday - Friday 37 hours per week, 12 months contract
IR35 Status: Inside
Security Clearance: Security Clearance required on submission

Responsibilities

  • Development of code within an agile environment (scrum).
  • Working with the team to design, implement and test features for a new product development.
  • Task estimation in accordance with sprint planning.

Essential Skills:

  • Java Core (version 8+)
  • Spring Boot, Spring Framework - Good knowledge of Developing in Spring with Hibernate
  • Good Knowledge of developing REST within HTTPS
  • Experience of developing within a microservice architecture
  • Web Services using RESTful APIs
  • Distributed systems
  • Knowledge and use of software design patterns
  • Agile Development Processes
  • CI/CD delivery techniques
  • Source code management (we use GIT)
  • Use of Issue tracking systems (such as Jira)
  • UML/SysML using Enterprise Architect or similar
  • Ability to self-motivate and to work well within a team environment.
  • Ability to promote innovation in self and others
  • Ability to interact with internal & external stakeholders in a confident and professional manner

If you are interested in applying for this position and you meet the requirements, please send your updated CV to: Natalie Dalkin at Line Up Aviation

Line Up Aviation has carved its own place in the recruitment of Aviation and Aerospace personnel all over the world for more than 30 years. We work with some of the industry’s best known companies who demand the highest standard of applicants.

" on Twitter for all of our latest vacancies, news and pictures from our busy UK Head Office. Interact with us using the tag at anytime! Thank you for your follow!"

Lead Full Stack Software Developer
Spectrum IT Recruitment
Multiple locations
Hybrid
Senior
£80,000 - £100,000
RECENTLY POSTED
+2

Technical Lead Full Stack Developer

(TypeScript, JavaScript, Node)

Location: Hybrid working within Hampshire
Salary: Competitive + benefits

We’re working with a fast-growing UK SaaS technology company that builds data-driven digital products used by commercial teams to better understand and engage with their customers. They are now looking for an experienced technical lead full stack developer to play a key role in shaping and delivering their next generation of customer-facing platforms.

This is a hands-on technical leadership role where you’ll be involved from early design through to production delivery, working with a modern cloud-based stack and deploying to live environments on a daily basis.

The Role

  • Lead technical delivery across a high-performing development squad (10+)
  • Contribute to solution design, system architecture and domain modelling
  • Build proof-of-concepts and spike complex or uncertain areas of work
  • Break down requirements into deliverable epics and user stories alongside product and initiative managers
  • Develop and deliver production-ready code across the full stack
  • Ensure high standards of quality, maintainability, performance and security
  • Support and improve live systems once deployed
  • Influence technical direction, tooling and best practice across the wider engineering function

Tech Environment

You’ll work with a modern stack including:

  • Node.js microservices
  • JavaScript & TypeScript
  • Vue.js
  • Redis, SQL Server & Snowflake
  • AWS cloud infrastructure
  • CI/CD pipelines and DevSecOps practices

About You

  • Strong full stack development experience (ideally 10+ years)
  • 5+ years of JavaScript and TypeScript experience
  • Solid background in system design and scalable architectures
  • Experience building large, production SaaS platforms
  • A clean-code mindset (SOLID principles, design patterns, testable code)
  • Experience working in mature CI/CD and continuous deployment environments
  • A commercial mindset when designing and delivering software
  • Excellent collaboration skills and confidence working with stakeholders
  • Interest in using AI to accelerate and improve software development
  • A passion for performance, security and engineering best practice
  • Degree in Computer Science or equivalent real-world experience

What’s On Offer

  • Competitive salary and benefits package
  • Hybrid working (1 day per week in the Fareham office)
  • Opportunity to join a scaling UK SaaS business
  • Strong engineering culture with a focus on quality and continuous improvement
  • Supportive, collaborative working environment
  • Community and charity initiatives, including volunteer days

Send your CV across to me on email (url removed) or call (phone number removed) for more information.

Spectrum IT Recruitment (South) Limited is acting as an Employment Agency in relation to this vacancy.

Principal Software Engineer
Sirius Digital
Portsmouth
Hybrid
Senior
£7,000

Salary: Negotiableplus benefits, pension (7% contribution), 25 days holiday & life insurance

We are looking for principal software engineers with diverse experience.

We are a small but rapidly growing consultancy, owned highly experienced and recognised practitioners in UK defence consultancy. We are looking for candidates with a mix of technical expertise and interpersonal skills, able to work independently and in small teams.

The Role:

As a Principal Software Engineer, you will play a major role in leading and developing software engineering 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 will include:

  • Take responsibility for the leadership and delivery of whole, or significant sub-components, of technical consulting projects and products.
  • 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.
  • Building new relationships and maintaining current customer relationships.

Expertise Required:

  • Principal Software Engineer: At least 10 years of experience, including designing and delivering software applications and leading teams.

About You:

We are looking for candidates who can help the company grow and can offer exciting opportunities for those with the drive to develop their own skills and those of the company. We offer competitive salaries and packages, and the opportunity for rapid advancement for the right candidates.

The successful candidate must be able to demonstrate the following attributes:

Essential

  • At least 10 years experience in designing and implementing performant software applications.
  • Apply mathematical principles or statistical approaches to solve problems in scientific or applied fields.
  • The ideal candidate will be educated to degree level or have equivalent relevant experience.
  • Proficient in C/C++ native development.
  • Demonstratable skills in stakeholder management including influencing, negotiating and conflict management.
  • Demonstratable experience and capability in writing proposals and coordinating bid management activity.
  • Experience in 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)
  • Agent, Entity and Event based Simulation
  • Robotics and Autonomous Systems
  • Understand varied codebases and be confident in making changes to large projects.
  • Understand performance and hardware constraints.
  • Building customer and stakeholder relationships.
  • Authoring of technical reports
  • Presenting to customers.
  • Be willing to travel (on occasion as projects demand) and comfortable to work at client sites for periods.

Desirable:

  • Experience working with Defence Digital, DE&S, Dstl, Frontline Commands or UK Defence industry.

Other Requirements:

  • Candidates must have an existing right to live and work in the UK.
  • Candidates will need to undergo an internal BPSS check prior to gaining site access.
  • Candidates will also need to either hold a current SC clearance or be willing and eligible to undergo a Security Clearance check (SC level) upon starting their employment with the company. To gain SC clearance you will normally need at least 5 years UK residency.
Full Stack Developer
Redline Group Ltd
Isle of Wight
In office
Mid - Senior
£35,000 - £45,000
+4

Are you an Engineer with a background in C#?

Are you a Software Developer looking for a new challenge within a globally recognised company?

If so I would love to speak to you!

An exciting opportunity has arrived for a Full Stack Software Developer (C#) based in the Isle of Wight to join a market leading technology organisation. Due to continued growth they are seeking a Full Stack Software Developer for their Isle of Wight office to be responsible for designing and implementing complex software components to the delivery of high-quality, responsive applications and solutions that satisfy customer requirements.

Main responsibilities of the Full Stack Software Developer (C#), based on the Isle of Wight:

  • Collaborate with the project manager to create and execute software development projects delivering high quality products.
  • Create and review requirements, functional and design specifications, for the development of complex software solutions.
  • Develop, modify and review code, adhering to quality standards in line with requirement, functional and design specifications.
  • Diagnose and assist the support team to resolve software issues including usability, configuration and coding.
  • Optimise the use of technology in the development of software solutions.
  • Lead technical teams and mentor team members.

Desirables of the Full Stack Software Developer (C#), based on the Isle of Wight:

  • Experience of software development in the Microsoft Visual Studio IDE, Azure DevOps and GitHub.
  • Experience with ASP.NET Core and JavaScript frameworks such as Vue.Js or React.
  • Experience with PowerBI, SQL Server Reporting Services or similar.
  • Experience of JSON, and cloud technologies.
  • Awareness of technology and software trends that may have an impact of the production, testing and delivery of software packages.

This is a great opportunity for a Full Stack Software Developer (C#) that has attention to detail, takes pride in their work and wants to do the best for their customers.

This is a great chance for a Full Stack Software Developer (C#) to join a global company who can offer the opportunity for career progression and personal development as well as an excellent benefits package.

To apply for the Full Stack Software Developer (C#) job in Isle of Wight please send your CV to (url removed).

Spotlight
Lead Software Engineer - C++ | Linux
Haystack - Partnerships
Chichester
Hybrid
Senior - Leader
£45,000 - £60,000

Job Specification: Lead Software Engineer Company Overview The employer is a leading developer and manufacturer of haemodynamic monitoring medical devices with a global market presence. The organization is currently undergoing a strategic digital transformation, transitioning from a hardware-centric model to a software-led solutions provider. In tandem with this shift, the company is developing a next-generation product range designed to capture new international market segments. The Role We are seeking a highly competent Lead Software Engineer to report directly to the CTO. This individual will be a strategic thinker capable of influencing cross-functional teams. Beyond expert-level coding, the successful candidate will leverage their technical expertise to drive the commercial growth and profitability of an ambitious international medical technology business. Key Responsibilities - Embedded Development: Develop software for embedded Linux platforms within a medical device environment. - Compliance: Lead the development of safety-critical software and documentation in strict accordance with _IEC 62304_. - System Integrity: Manage investigation of software issues, identify solutions, and lead design/code reviews. - Testing & Release: Create software test plans, execute integration testing, and manage change/release cycles. - Security: Support and implement cybersecurity requirements for medical devices. - Strategic Input: Provide technical insight to guide the development of new features and software-led product strategies. Required Skills & Competencies - Technical Proficiency: Proven track record in software development using _C/C++_. - Platform Experience: Strong experience delivering solutions on embedded Linux operating systems. - Systems Engineering: Expertise in software development lifecycles, including integration and testing. - Leadership: Ability to provide clear technical direction and solve complex problems. - Communication: Excellent verbal and written communication skills with the ability to manage internal stakeholders. Desired Skills & Competencies - Regulated Environments: Experience delivering real-time or safety-related software (MedTech, Aerospace, etc.). - Frameworks & Tools: Experience with Qt/QML and _GitLab_. - Languages: Knowledge of Rust is highly advantageous; proficiency in Python or Bash scripting. - Architecture: Knowledge of modeling languages (e.g., _SysML, UML_) and both procedural and object-oriented development. - Linux Customization: Knowledge of Yocto for customizing Linux OS using System-on-Module (SOM) Board Support Packages (BSPs).

Spotlight
Lead Software Engineer
Deltex Medical
Chichester
Hybrid
Senior - Leader
Private salary

Deltex Medical is a Chichester-based developer and manufacturer of haemodynamic monitoring medical devices that are sold around the world. Deltex Medical is looking to migrate its product range and market position from being hardware-centric to becoming increasingly software-centric. In parallel to the shift to an increasing focus on software-based solutions, the Company is in the process of developing a new product range to enable it to access new market segments in the international medical device market. Deltex Medical is looking for a highly competent lead software engineer – who will report to the CTO - who is also able to think strategically and, as appropriate, influence colleagues. This role goes beyond being an expert coder – but to someone who is looking to leverage their skills and expertise to help grow the revenues and profitability of an ambitious international medical device business. Typical ‘work product’: ▪ Develop software for embedded Linux within a medical device ▪ Investigation into software problem causes and identify solutions ▪ Develop, in conjunction with colleagues, software requirements ▪ Responsible for developing safety critical software and documentation to comply with IEC 62304 ▪ Creation of Software test plans and integration test execution ▪ Change and release management ▪ Lead design and code reviews ▪ Support cybersecurity requirements of medical devices ▪ Provide strategic insight and support for the development of new products and/or new software-related features Required skills / competencies: ▪ Proven track record in developing Software solutions using C/C++ ▪ Proven experience delivering solutions on an embedded Linux operating system ▪ Experience of systems engineering, software development, integration and test ▪ Strong problem-solving skills and the ability to provide clear technical direction ▪ Excellent verbal and written communication ▪ Ability to build effective working relationships with the team and internal stakeholders ▪ Strong time management and organisational skills Desired skills / competencies: ▪ Experience of delivering real-time and/or safety-related software in a regulated environment ▪ Experience with Qt/QML ▪ Knowledge of modelling languages (e.g. SysML, UML) ▪ Knowledge of procedural and object orientated software development languages (e.g. C, C++) ▪ Experience of working in Rust would be advantageous ▪ Knowledge of scripting languages (e.g. Python, Bash) ▪ Experience of GitLab ▪ Knowledge of configuration management within a software engineering environment ▪ Knowledge of Yocto in the customisation of Linux operating systems using SOM BSPs.

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Frequently asked questions
Portsmouth offers a variety of Full Stack Engineer roles, including positions in startups, tech firms, and established companies focusing on web development, software engineering, and cloud-based solutions.
Employers typically seek expertise in JavaScript (React, Angular, or Vue), backend technologies like Node.js, Python, or Java, experience with databases such as SQL or NoSQL, and familiarity with DevOps tools and version control systems like Git.
Yes, many companies in Portsmouth offer remote or hybrid Full Stack Engineer positions, providing flexibility while allowing you to work with local or international teams.
Salaries vary depending on experience and company size but generally range from £35,000 to £60,000 per year for mid-level engineers, with senior roles offering higher compensation.
Simply browse available Portsmouth Full Stack Engineer listings on Haystack, create a profile, upload your CV, and apply directly through our platform. You can also set up job alerts to receive notifications about new relevant roles.