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18 API jobs in Portsmouth + 20 miles
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Drive adoption of cloud-native, API-first, and DevOps practices to accelerate delivery and improve resilience.
Drive adoption of cloud-native, API-first, and DevOps practices to accelerate delivery and improve resilience.
NEW
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Senior Software Engineer - C++
Senior Software Engineer - C++
MaxAd
Causeway, Petersfield (GU31), GU31
£58000.00 - £63000.00 per annum + Excellent Benefits
API fundamentals * Python and Bash
API fundamentals * Python and Bash
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UK Remote (Occasional travel to Glasgow or Reading) * Up to £100,000 per annum (Including car allowance + bonus) * Permanent * Eligibility for SC Clearance Required - Are you an accomplished Dynamics 365 Architect with a passion for designing impactful, enterprise-grade solutions? We are seeking a forward-thinking professional to join a high-performing Microsoft practice, where you will play a pivotal role in the technical design and delivery of secure, scalable Dynamics 365 and Power Platform solutions. This is a remote role based in the UK, with occasional travel required to client sites or team hubs in Glasgow or Reading. Please note that eligibility for SC Clearance is essential. * Salary up to £100,000 with Car allowance and performance-based bonus included * Flexible remote working with occasional hybrid travel
UK Remote (Occasional travel to Glasgow or Reading) * Up to £100,000 per annum (Including car allowance + bonus) * Permanent * Eligibility for SC Clearance Required - Are you an accomplished Dynamics 365 Architect with a passion for designing impactful, enterprise-grade solutions? We are seeking a forward-thinking professional to join a high-performing Microsoft practice, where you will play a pivotal role in the technical design and delivery of secure, scalable Dynamics 365 and Power Platform solutions. This is a remote role based in the UK, with occasional travel required to client sites or team hubs in Glasgow or Reading. Please note that eligibility for SC Clearance is essential. * Salary up to £100,000 with Car allowance and performance-based bonus included * Flexible remote working with occasional hybrid travel
Are you ready to put your technical expertise to work in transforming services that directly improve lives across the UK? Our client provides emergency accommodation and vital support for some of the countrys most vulnerable people including survivors of domestic abuse, refugees, and individuals seeking asylum. Their mission is to create safe environments and deliver innovative solutions that protect and empower those most in need. They are now looking for a Senior Software Engineerto take a key role in rebuilding and modernising their software landscape. This is a unique opportunity to shape critical systems that underpin essential frontline services. Whats on Offer * Fully remote within the UK * Salary up to £80,000 * 33 days annual leave * Pension & healthcare * A role with genuine social impact * A supportive, mission-driven workplace
Are you ready to put your technical expertise to work in transforming services that directly improve lives across the UK? Our client provides emergency accommodation and vital support for some of the countrys most vulnerable people including survivors of domestic abuse, refugees, and individuals seeking asylum. Their mission is to create safe environments and deliver innovative solutions that protect and empower those most in need. They are now looking for a Senior Software Engineerto take a key role in rebuilding and modernising their software landscape. This is a unique opportunity to shape critical systems that underpin essential frontline services. Whats on Offer * Fully remote within the UK * Salary up to £80,000 * 33 days annual leave * Pension & healthcare * A role with genuine social impact * A supportive, mission-driven workplace
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Fixed Term - Logistics - Havant - About the Role - Salary: £52,000 £60,000 + Excellent Benefits - Working Pattern: 37.5 hours per week | 4 day working week Monday to Thursday | Remote working but required to come to the office when needed. Location: Havant, Portsmouth. Here at Lockheed Martin we are seeking a Logistics Software Engineer to enhance its software development capability and provide ongoing support for a suite of applications used by both internal stakeholders and Ministry of Defence (MoD) customers. This role requires an experienced and innovative professional who can assume ownership of both new and existing development projects. The successful candidate will be capable of defining technical requirements, managing development tasks, and delivering high-quality software solutions that meet or exceed customer expectations. Key Responsibilities
Fixed Term - Logistics - Havant - About the Role - Salary: £52,000 £60,000 + Excellent Benefits - Working Pattern: 37.5 hours per week | 4 day working week Monday to Thursday | Remote working but required to come to the office when needed. Location: Havant, Portsmouth. Here at Lockheed Martin we are seeking a Logistics Software Engineer to enhance its software development capability and provide ongoing support for a suite of applications used by both internal stakeholders and Ministry of Defence (MoD) customers. This role requires an experienced and innovative professional who can assume ownership of both new and existing development projects. The successful candidate will be capable of defining technical requirements, managing development tasks, and delivering high-quality software solutions that meet or exceed customer expectations. Key Responsibilities
Are you a seasoned IT professional ready to take the lead on shaping robust, scalable, and secure technical solutions? We're looking for an IT Infrastructure Lead to drive architectural consistency, technical excellence, and delivery best practices across our IT function. About the Role - As our IT Technical Lead, you'll be at the heart of our technology ecosystem-bridging infrastructure, application development, service delivery, and cybersecurity. You'll play a pivotal role in guiding the design and implementation of end-to-end solutions, acting as a senior technical authority and trusted advisor to both IT and business teams. This role is hands-on when it needs to be, offering a unique blend of strategic influence and technical depth. From resolving complex incidents to shaping future-ready architectures, your contribution will be key to our IT evolution.
Are you a seasoned IT professional ready to take the lead on shaping robust, scalable, and secure technical solutions? We're looking for an IT Infrastructure Lead to drive architectural consistency, technical excellence, and delivery best practices across our IT function. About the Role - As our IT Technical Lead, you'll be at the heart of our technology ecosystem-bridging infrastructure, application development, service delivery, and cybersecurity. You'll play a pivotal role in guiding the design and implementation of end-to-end solutions, acting as a senior technical authority and trusted advisor to both IT and business teams. This role is hands-on when it needs to be, offering a unique blend of strategic influence and technical depth. From resolving complex incidents to shaping future-ready architectures, your contribution will be key to our IT evolution.
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Embedded Software Engineer
Embedded Software Engineer
Morson Edge
The Airport, Portsmouth (PO3), PO3
£48.59 - 65.00 per hour + Inside IR35
Portsmouth (hybrid working 3 days onsite per week, 2 days from home) – 6 month duration – Pay rate £48.59 p/h PAYE (£55.65 p/h including holiday pay) or £65 p/h Umbrella - We are looking for an Embedded Software Engineer to join our defence clients Software Defined Radio team within the UK System Delivery group. The team is undertaking the design and implementation of a satellite communications Software Defined Radio (SDR) modem. You will be part of a small multi-disciplinary team containing software, system, firmware and infrastructure engineers. There will be scope in the future to work on further developments as project needs arise. You will research and develop aspects of modem products and associated communications systems, using your experience in software within complex systems. Responsibilities
Portsmouth (hybrid working 3 days onsite per week, 2 days from home) – 6 month duration – Pay rate £48.59 p/h PAYE (£55.65 p/h including holiday pay) or £65 p/h Umbrella - We are looking for an Embedded Software Engineer to join our defence clients Software Defined Radio team within the UK System Delivery group. The team is undertaking the design and implementation of a satellite communications Software Defined Radio (SDR) modem. You will be part of a small multi-disciplinary team containing software, system, firmware and infrastructure engineers. There will be scope in the future to work on further developments as project needs arise. You will research and develop aspects of modem products and associated communications systems, using your experience in software within complex systems. Responsibilities
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Introduction - Saab UK is part of Scandinavia's largest defence company, bringing together the best of Swedish and British innovation. Saab offers world-leading solutions and services in defence, aviation, space, and civil security to keep people and society safe. Our UK presence has been growing at pace, meaning we can offer a wide range of opportunities for personal fulfilment and career growth. We currently employ over 600 people across eight sites in the UK, and our specialisations include software engineering, underwater robotics, radars, AI, and armed forces training. Explore a wealth of possibilities. Take on challenges, create smart inventions, and grow beyond. This is a place for curious minds, brave pioneers, and everyone in between. Together, we achieve the extraordinary, each bringing our unique perspectives. Your part matters.
Introduction - Saab UK is part of Scandinavia's largest defence company, bringing together the best of Swedish and British innovation. Saab offers world-leading solutions and services in defence, aviation, space, and civil security to keep people and society safe. Our UK presence has been growing at pace, meaning we can offer a wide range of opportunities for personal fulfilment and career growth. We currently employ over 600 people across eight sites in the UK, and our specialisations include software engineering, underwater robotics, radars, AI, and armed forces training. Explore a wealth of possibilities. Take on challenges, create smart inventions, and grow beyond. This is a place for curious minds, brave pioneers, and everyone in between. Together, we achieve the extraordinary, each bringing our unique perspectives. Your part matters.
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Software Engineer
Software Engineer
Yoh Solutions Ltd
Southampton (SO16)
From £70,000 to £100,000 per annum Bonus, equity, PMI, pension
Permanent | £75k£100k + Bonus + Equity | Hybrid (Southampton) If your idea of good engineering is squeezing every last cycle out of a CPU, building software that talks to hardware at speed, and solving real wireless signal-processing problems youll probably get on well here. This team designs and builds high-performance software for wireless communication systems 5G, satellite comms, and advanced baseband processing. The real, high-throughput, low-latency kind. Theyre hiring Senior Software Engineers and Principal Software Engineers, depending on depth of experience and appetite for technical leadership. What youll be working on - Youll be turning clever DSP and comms algorithms into real-time production software running on x86 or ARM, and building high-performance APIs that interface with hardware acceleration. * Real-time C/C++ for wireless signal processing
Permanent | £75k£100k + Bonus + Equity | Hybrid (Southampton) If your idea of good engineering is squeezing every last cycle out of a CPU, building software that talks to hardware at speed, and solving real wireless signal-processing problems youll probably get on well here. This team designs and builds high-performance software for wireless communication systems 5G, satellite comms, and advanced baseband processing. The real, high-throughput, low-latency kind. Theyre hiring Senior Software Engineers and Principal Software Engineers, depending on depth of experience and appetite for technical leadership. What youll be working on - Youll be turning clever DSP and comms algorithms into real-time production software running on x86 or ARM, and building high-performance APIs that interface with hardware acceleration. * Real-time C/C++ for wireless signal processing
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Chichester / Fernhurst (Hybrid: 1 day WFH) | Up to £60k DOE - Liberty Recruitment Group is proud to partner with our luxury manufacturing client in their search for a Group Business Central Analyst. This newly created role offers the chance to take full ownership of the Dynamics 365 Business Central system across multiple entities. Youll play a key role in consolidating three separate BC instances, improving system architecture, reducing reliance on third-party extensions, and enhancing automation, integration, and reporting. * Develop and support BC functionality using AL coding, APIs, and Power Platform tools * Lead the consolidation of multiple BC systems into one streamlined solution * Collaborate with internal teams to automate processes and reduce manual work * Manage RBAC and enhance system security * Upskill users and act as the in-house BC expert
Chichester / Fernhurst (Hybrid: 1 day WFH) | Up to £60k DOE - Liberty Recruitment Group is proud to partner with our luxury manufacturing client in their search for a Group Business Central Analyst. This newly created role offers the chance to take full ownership of the Dynamics 365 Business Central system across multiple entities. Youll play a key role in consolidating three separate BC instances, improving system architecture, reducing reliance on third-party extensions, and enhancing automation, integration, and reporting. * Develop and support BC functionality using AL coding, APIs, and Power Platform tools * Lead the consolidation of multiple BC systems into one streamlined solution * Collaborate with internal teams to automate processes and reduce manual work * Manage RBAC and enhance system security * Upskill users and act as the in-house BC expert
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Trafalgar Talent is supporting a fast-growing, multi-award-winning cybersecurity business as they continue to scale their development team. This organisation builds cutting-edge security products used by millions worldwide, helping protect users from evolving digital threats across all their devices. Theyve developed a suite of powerful tools, including antivirus, VPN, ad-blocking, password management and more, all designed to simplify and strengthen online safety for everyday users. With continuous growth and new product innovation underway, the team is now looking for an experienced PHP Developer to join their high-performing engineering function. The Role - As a Senior PHP Developer, youll play a key part in shaping and improving the companys core web systems. * User onboarding journeys * Customer account portals * APIs powering multiple applications
Trafalgar Talent is supporting a fast-growing, multi-award-winning cybersecurity business as they continue to scale their development team. This organisation builds cutting-edge security products used by millions worldwide, helping protect users from evolving digital threats across all their devices. Theyve developed a suite of powerful tools, including antivirus, VPN, ad-blocking, password management and more, all designed to simplify and strengthen online safety for everyday users. With continuous growth and new product innovation underway, the team is now looking for an experienced PHP Developer to join their high-performing engineering function. The Role - As a Senior PHP Developer, youll play a key part in shaping and improving the companys core web systems. * User onboarding journeys * Customer account portals * APIs powering multiple applications
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Senior Systems Developer
Senior Systems Developer
Brockenhurst College
Balmerlawn, Brockenhurst (SO42), SO42 7ZE
£46790.00 to £49339.00 per year
Experience in database design, API development, and system integration.
Experience in database design, API development, and system integration.
PREMIUM
Neos Networks offers alternative working arrangements that give employees some flexibility, including office, home and hybrid working. Base location: Havant with hybrid working 2 days per week in the office - Salary: £ to £69,600 dep on experience + performance related bonus + a range of other benefits to support your family, finances, and wellbeing. Working Pattern: Permanent Full time 37 hours per week - Role Purpose - The Application Support Engineer delivers operational and administrative support for Neos Networks monitoring and service management platforms, primarily Splunk and ServiceNow. Key responsibilities include maintaining dashboards that visualise network health, managing data ingestion from infrastructure devices (e.g. switches, routers, firewalls, Power & Environmental services, etc), scripting automation to enhance alerting and response, and supporting
Neos Networks offers alternative working arrangements that give employees some flexibility, including office, home and hybrid working. Base location: Havant with hybrid working 2 days per week in the office - Salary: £ to £69,600 dep on experience + performance related bonus + a range of other benefits to support your family, finances, and wellbeing. Working Pattern: Permanent Full time 37 hours per week - Role Purpose - The Application Support Engineer delivers operational and administrative support for Neos Networks monitoring and service management platforms, primarily Splunk and ServiceNow. Key responsibilities include maintaining dashboards that visualise network health, managing data ingestion from infrastructure devices (e.g. switches, routers, firewalls, Power & Environmental services, etc), scripting automation to enhance alerting and response, and supporting
Job Description * Wireless (Aruba/Cisco wireless, RF design, site surveys, WPA2/3 Enterprise, integration with NAC) * EVPN/VXLAN (data center fabrics, MP-BGP, route types, spine-leaf design, segmentation) * Network Access Control (NAC) (Cisco ISE or Aruba ClearPass, 802.1X/MAB, posture assessment, guest/BYOD workflows) * Network Automation / NetDevOps (Python, Ansible/Nornir, CI/CD pipelines, Source of Truth [Nautobot/NetBox], vendor APIs) If you have experience in any of these specialist tracks, even just one, we encourage you to apply. * Provide SME input to core networking technologies for operational and project delivery purposes * Act as a technical lead in all Network & Communication activities, working closely with connectivity partners and third-party suppliers * Proactively review the Network & Communications infrastructure to identify opportunities for conti
Job Description * Wireless (Aruba/Cisco wireless, RF design, site surveys, WPA2/3 Enterprise, integration with NAC) * EVPN/VXLAN (data center fabrics, MP-BGP, route types, spine-leaf design, segmentation) * Network Access Control (NAC) (Cisco ISE or Aruba ClearPass, 802.1X/MAB, posture assessment, guest/BYOD workflows) * Network Automation / NetDevOps (Python, Ansible/Nornir, CI/CD pipelines, Source of Truth [Nautobot/NetBox], vendor APIs) If you have experience in any of these specialist tracks, even just one, we encourage you to apply. * Provide SME input to core networking technologies for operational and project delivery purposes * Act as a technical lead in all Network & Communication activities, working closely with connectivity partners and third-party suppliers * Proactively review the Network & Communications infrastructure to identify opportunities for conti
2025-11-26T08:25:42+00:00 - AccelerComm Ltd - FULL_TIME - Department: Software - Employment Type: Permanent - Full Time - Location: Southampton, UK - Reporting To: Chris Rawlings - Description - This is a unique opportunity to join a fast-growing company on the South coast, with international reach. We are looking for a capable, enthusiastic and personable Principal Software Engineer to join our Software & Systems Development Team. This is a hands-on role, which will play an important part in the growth of AccelerComm and its product portfolio. Key Responsibilities * Create designs, write code and corresponding tests in the development and optimisation of real-time software implementations of wireless communication signal processing, using x86 or ARM targets. * Create designs, write code and corresponding tests for high-performance software and APIs for hardware imple
2025-11-26T08:25:42+00:00 - AccelerComm Ltd - FULL_TIME - Department: Software - Employment Type: Permanent - Full Time - Location: Southampton, UK - Reporting To: Chris Rawlings - Description - This is a unique opportunity to join a fast-growing company on the South coast, with international reach. We are looking for a capable, enthusiastic and personable Principal Software Engineer to join our Software & Systems Development Team. This is a hands-on role, which will play an important part in the growth of AccelerComm and its product portfolio. Key Responsibilities * Create designs, write code and corresponding tests in the development and optimisation of real-time software implementations of wireless communication signal processing, using x86 or ARM targets. * Create designs, write code and corresponding tests for high-performance software and APIs for hardware imple
2025-11-26T08:41:19+00:00 - AccelerComm Ltd - FULL_TIME - Department: Software - Employment Type: Permanent - Full Time - Location: Southampton, UK - Description - This is a unique opportunity to join a fast-growing company on the South coast, with international reach. We are looking for a capable, enthusiastic and personable Senior Software Engineer to join our Software & Systems Development Team. It's essential that you have some exposure to writing code in C or C++; experience of Matlab and Python is also highly desirable, as is any contributing knowledge of Wireless Communication. This is a hands-on role, which will play an important part in the growth of AccelerComm and its product portfolio. Key Responsibilities * Lead in the development and optimisation of real-time software implementations of wireless communication signal processing, using x86 or ARM targets.
2025-11-26T08:41:19+00:00 - AccelerComm Ltd - FULL_TIME - Department: Software - Employment Type: Permanent - Full Time - Location: Southampton, UK - Description - This is a unique opportunity to join a fast-growing company on the South coast, with international reach. We are looking for a capable, enthusiastic and personable Senior Software Engineer to join our Software & Systems Development Team. It's essential that you have some exposure to writing code in C or C++; experience of Matlab and Python is also highly desirable, as is any contributing knowledge of Wireless Communication. This is a hands-on role, which will play an important part in the growth of AccelerComm and its product portfolio. Key Responsibilities * Lead in the development and optimisation of real-time software implementations of wireless communication signal processing, using x86 or ARM targets.
API and SDK development
API and SDK development
API Testing experience, with preference given to those skilled in utilizing the Postman tool (Must).
API Testing experience, with preference given to those skilled in utilizing the Postman tool (Must).
191 exact matches jobs are outside your preferred location
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Senior .Net Integration Developer
Senior .Net Integration Developer
Rise Technical
Maidenhead, Berkshire
£50000.00 - £70000.00 per annum + + Training + Holiday
You will use your expertise in C#/.NET and modern APIs (REST, WebAPI, JSON, OAuth2) to build fault-tolerant, event-driven integrations, support customers and partners with API usage, and deliver clear, high-quality documentation while maintaining security, GDPR compliance, and operational reliability. Taking integration leadership, you will design and maintain well-documented financial and third-party integrations built on modern API standards. * Support customers and partners with integration setup and API usage
You will use your expertise in C#/.NET and modern APIs (REST, WebAPI, JSON, OAuth2) to build fault-tolerant, event-driven integrations, support customers and partners with API usage, and deliver clear, high-quality documentation while maintaining security, GDPR compliance, and operational reliability. Taking integration leadership, you will design and maintain well-documented financial and third-party integrations built on modern API standards. * Support customers and partners with integration setup and API usage
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Senior .Net Integration Developer
Senior .Net Integration Developer
Rise Technical Recruitment Limited
Maidenhead (SL6)
£50000.00 - £70000.00 per annum + + Training + Holiday
You will use your expertise in C#/.NET and modern APIs (REST, WebAPI, JSON, OAuth2) to build fault-tolerant, event-driven integrations, support customers and partners with API usage, and deliver clear, high-quality documentation while maintaining security, GDPR compliance, and operational reliability. Taking integration leadership, you will design and maintain well-documented financial and third-party integrations built on modern API standards. * Support customers and partners with integration setup and API usage
You will use your expertise in C#/.NET and modern APIs (REST, WebAPI, JSON, OAuth2) to build fault-tolerant, event-driven integrations, support customers and partners with API usage, and deliver clear, high-quality documentation while maintaining security, GDPR compliance, and operational reliability. Taking integration leadership, you will design and maintain well-documented financial and third-party integrations built on modern API standards. * Support customers and partners with integration setup and API usage
PREMIUM
Analyse technical capabilities, integrations, and API readiness.
Analyse technical capabilities, integrations, and API readiness.
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Experience in creating front end and API automated test projects
Experience in creating front end and API automated test projects
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Act as the champion for TMF ODA and Open API principles across Energy Services Platform. Strong experience designing and implementing solutions using TM Forum Open APIs and a deep understanding of the ODA and Open API frameworks - Proficiency in RESTful API design, JSON, OpenAPI/Swagger specifications, microservices architecture, and cloud-native deployment models (Docker, Kubernetes, public/hybrid cloud platforms)
Act as the champion for TMF ODA and Open API principles across Energy Services Platform. Strong experience designing and implementing solutions using TM Forum Open APIs and a deep understanding of the ODA and Open API frameworks - Proficiency in RESTful API design, JSON, OpenAPI/Swagger specifications, microservices architecture, and cloud-native deployment models (Docker, Kubernetes, public/hybrid cloud platforms)
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Applications Support Analyst / Engineer
Applications Support Analyst / Engineer
Kudos Partners
Datchet Common, Slough (SL3), SL3
£75,000 per annum plus 12% bonus - generous benefits package
API support and monitoring tools (e.g., SolarWinds, AzureAppInsights)
API support and monitoring tools (e.g., SolarWinds, AzureAppInsights)
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Proven track record delivering ITSM integrations, API development, web services and automation.
Proven track record delivering ITSM integrations, API development, web services and automation.
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