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Contractor 48
software engineer London

48 software engineer jobs found in London

CL
Jul 10, 2025  
Software Engineer - Remote - Java - low latency - Inside IR35
This is a fantastic opportunity to work as a Sofware Engineer, on a long term contract, working for a major finance company, inside IR35 and fully remote. The key skills required for this Software Engineer role are below. Low latency FX Matching Java C++ (desirable) trading (desirable) SQL Gradle If you do have the relevant experience for this remote Software Engineer position, please do apply
IR35 Status:
Inside IR35

CV-Library London, UK Contractor
CL
Jul 10, 2025  
C++ Software Engineer
World Class Defence Organisation based in Stevenage, Hertfordshire is currently looking to recruit a C++ Software Engineer subcontractor on an initial 12 month contract, with very likely extension.  The role will be onsite 4 days per week.  A 4 day working week is OK (Monday to Thursday).   Candidates with a strong C++ Software Engineering / Embedded Software Engineer background ideally from the Defence / Aerospace industry would be suitable for this position. Rate: £67.00 per hour Overtime Rate: Hours worked over the standard 37 hours per week, will be paid at ‘time and a quarter’ Location: Stevenage Hybrid / Remote working: The role will be onsite 4 days per week. A 4 day working week is OK (Monday to Thursday). Duration: 12 Months with very likely extension. Contracts are often ongoing and long-term thereafter.  IR35 status: Inside IR35 (Umbrella) Interview process: One stage video interview   Job Description: By embracing the latest software technologies and methods the...
IR35 Status:
Inside IR35

CV-Library Stevenage, UK Contractor
CL
Jul 10, 2025  
Software Engineer C
Our client, a prominent player in the Defence & Security sector, is currently seeking a skilled Software Engineer C++ for a contract role in Stevenage, Hertfordshire. This position involves working 100% on-site, developing and maintaining software in a Linux environment. You will engage with high-speed real-time data flows, and complex multi-threaded processing pipelines. Key Responsibilities: Designing and developing real-time test and capture software on Linux systems using C++ Integrating and interfacing with high-speed SFPDP cards across multi-channel data pipelines Architecting and implementing robust, scalable, and maintainable multi-threaded applications Defining and implementing data sequencing and synchronisation logic for deterministic capture and replay Working with hardware teams to ensure seamless integration and timing alignment Leading and contributing to system integration, verification, and testing at both component and system levels Conducting performance...
IR35 Status:
Unknown Status

CV-Library Stevenage, Hertfordshire Contractor
CL
Jul 10, 2025  
C++ Software Engineer
This company is seeking an experienced C++ Software Engineer to join their dynamic development team in Stevenage, Hertfordshire. As a Software Engineer, you will play a crucial role in designing, developing, and integrating real-time test and data capture systems on Linux platforms. Responsibilities: - Designing and developing real-time test and capture software using C++ in a Linux environment - Integrating and interfacing with high-speed SFPDP cards across multi-channel data pipelines - Architecting and implementing robust, scalable, and maintainable multi-threaded applications - Defining and implementing data sequencing and synchronisation logic to support deterministic capture and replay - Collaborating with hardware teams to ensure seamless integration and timing alignment between software and capture cards - Leading and contributing to system integration, verification, and testing at both component and system levels - Conducting performance analysis, debugging, and...
IR35 Status:
Unknown Status

CV-Library Stevenage, Hertfordshire Contractor
CL
Jul 10, 2025  
Software Engineer (C#, C++)
Software Engineer C++ C# JOB LOCATION: Stevenage SECURITY CLEARANCE LEVEL: SC needed to start- UKEO DURATION: 12+ Months Minimum WORK PATTERN: Fully Onsite; Compressed Possible PAY RATE: £65 - £67 Per Hour Umbrella Inside IR35 TARGET INDUSTRIES AND COMPANIES. Is Defence a must? If not what industries can be considered Ideally Def/Aero; would be more likely to be prioritised. Open to other industries if they have the skills Overview: By embracing the latest software technologies and methods the Development Simulation software department delivers exceptional software solutions for non-production based test systems that meet the unique requirements of the prime software development teams. In addition we also provide equipment simulation systems to support product integration as well as software to support and assist the manufacturing process. What we are looking for: We are currently looking to recruit an experienced self-starting Software Engineer for a position in...
IR35 Status:
Inside IR35

CV-Library Stevenage, Hertfordshire Contractor
CL
Jul 03, 2025  
Software QA Automation Engineer
Senior/Lead QA Automation Engineer **Only apply if you currently have the right to work in the UK without sponsorship and are willing to work onsite 2-3 days per week in Central London** Certain Advantage are recruiting on behalf of our global energy trading client in London for a Senior/Lead QA Automation Engineer working onsite 3 days per week. Starting ASAP initially until 31st October this contract is working inside IR35. You must demonstrate Automation experience, with the ability to manage and deliver top quality testing for medium to large programs. Essential candidate experience sought: Experience as QA lead. Agile testing & test automation (accelerators tools). Selenium C# with BDD framework using Specflow, API Automation. Implementation of selenium Grid. Demonstrable experience applying appropriate test measurements & metrics.Roles and Responsibilities: Take a leadership position in automation, working with Architects and Scrum team members to clarify...
IR35 Status:
Inside IR35

CV-Library London, UK Contractor
CL
Jul 13, 2025  
Software Engineering Manager
Adecco is an employment consultancy. We put expertise, energy, and enthusiasm into improving everyone's chance of being part of the workplace. We respect and appreciate people of all ethnicities, generations, religious beliefs, sexual orientations, gender identities, and more. We do this by showcasing their talents, skills, and unique experience in an inclusive environment that helps them thrive. Are you a dynamic leader with a passion for technology and innovation? Do you thrive in fast-paced environments and have a knack for guiding teams to success? If so, our client in the utilities sector is seeking a talented Software Engineering Manager to join their team on a temporary contract for 3 months! This is your chance to make a significant impact while working with cutting-edge technologies, including AWS Services and Generative AI. Role: Software Engineering Manager Location: Any of UK Offices (Hybrid) Duration: 3 Months Rate: £750 pd (umbrella) What You'll Be Doing: As...
IR35 Status:
Unknown Status

CV-Library London, UK Contractor
CL
Jul 12, 2025  
Senior Backend Developer
Join a dynamic energy provider dedicated to sustainable solutions in the UK. We seek enthusiastic and resourceful Backend Python Engineers at mid to senior levels who are passionate about crafting exceptional products. Initially it will be a five-month contract but there is potential for it to be extended. The role is Hybrid, with one day a week being based in their London office. It is a full-time role, 40 hours per week. If this role feels right, send us your CV. Accountabilities: * Playing a pivotal role in the backend engineering team, you will help to build full-stack cloud apps. * You'll be using Python and AWS Cloud services on the backend. * Adopt a Server-less first approach to application design, collaborating within an agile team alongside other backend engineers and product designers. * Strategize, develop, test, and deploy new features and experiments. * Engage in collaborative coding practices such as pair programming and code reviews within the team. * Contribute...
IR35 Status:
Unknown Status

CV-Library City of London, London Contractor
CL
Jul 10, 2025  
C++ Linux Real Time Software
Software Engineer C/C++ / Linux / Real Time required for long term contract based in Stevenage full time. Candidates need to be eligible for UK Eyes Only security clearance. Skillset/experience required: *Strong ability and experience of software development, ideally using C, C++ or similar *Experience developing within the Linux environment. *Good problem solving skills *Be pro-active and be capable of working on their own initiative with minimum supervision *Able to work with varied engineering teams Desirable: *Experience of Integrating hardware and software. *Experience with multi-threaded software products. *Experience of driver level software development. *Experience using Matlab/Simulink *Understanding of real time computing systems *Understanding of mathematical modelling concepts *Ability to visualise and analyse complex systems Overview of department: You would be part of a small, multi-skilled team, doing complex technical work and experiencing a wide variety of...
IR35 Status:
Unknown Status

CV-Library Stevenage, Hertfordshire Contractor
CL
Jul 13, 2025  
Network Security Engineer
Network Security Engineer 2-3 month Contract London (Hybrid) £335/day Outside IR35 Network Security Engineer required for an initial 2–3 month rolling contract, with an immediate start — ideally available by July 2025. This role is primarily remote, with occasional travel to a client site in London. A chance to work with an established global IT and Digital transformation consultancy for an end client in the Telecoms domain. Key Skills and experience: Strong network security skill set including Checkpoint firewalls (NGFW) and F5 load balancers (BIG-IP) Proficient in configuring, managing, and troubleshooting Checkpoint firewalls and security policies Hands-on experience with F5 BIG-IP for load balancing, application delivery, and traffic management In-depth knowledge of Cisco LAN/WAN environments (routers, switches, ASA, Catalyst, Nexus) Extensive experience in networking and security, including migration, configuration, and troubleshooting Expert-level knowledge...
IR35 Status:
Outside IR35

CV-Library London, UK Contractor
CL
Jul 13, 2025  
SC Senior Back up and Storage Technical SME CGEMJP00301427
Role Title: Senior Back up and Storage Technical SME Duration: 3 month contract Location: London. Hybrid, 80% Remote - 20% Office Rate: up to £506 p/d Umbrella inside IR35 Clearance: Active SC is essential & you must either hold or be eligible for NPPV3 clearance Role purpose / summary Our client is looking for an experienced Enterprise Storage Engineer with recent experience of design/configuration of at least two or more of the following Dell Storage platforms Key Skills/ requirements Storage Role: Dell PowerStore Dell Unity Dell PowerScale or Isilon Dell ECS Experience of configuring Dell (Cisco SAN fabrics). Preferably experience of writing low level storage design or configuration documentation. Backup Role: Experienced Enterprise Backup Engineer with recent experience of design/configuration of NetBackup Software solutions. Preferably up to NetBackup version 10.x Experience of Veritas NetBackup Appliances is desirable (although if candidate has Data Domain...
IR35 Status:
Inside IR35

CV-Library London, UK Contractor
CL
Jul 10, 2025  
2nd Line Support Engineer
2nd Line EUC Analyst    Our long-standing client, an FTSE 250 financial services provider, is hiring a 2nd Line EUC Analyst with experience supporting enterprise corporations within an End Users/EUC Experience Team. To be successful, you must have demonstrable experience within a 2nd line service desk position within a regulated corporation providing second line to support to MAC/Windows OS, 365 suite (Intune/Autopilot), Azure Virtual Desktop and Cloud printing solutions.  Our client is offering a day rate of £250 to £300 PD for a 6/12-month project to be based in London, Whitfield Street - 5 days per week.   Key Responsibilities: Facilitate Joiners, Movers, and Leavers, including deployment of equipment, updates to Active Directory, and software installation. Ensure service requests are fulfilled in line with agreed SLAs and that users are communicated to, updating them through the process. Escalation of potential Major Incidents and Risk Events for management visibility and...
IR35 Status:
Unknown Status

CV-Library London, UK Contractor
CL
Jul 10, 2025  
Senior Java Engineer
FDM is a global business and technology consultancy seeking a Java Software Developer to work for our client within the finance sector. This is initially a 6-month contract with the potential to extend and will be a hybrid role that will be based in London. Our client is seeking an experienced Java Software Developer who has experience in Trade Capture, Settlements, Risk/PnL across any asset classes. The successful candidate will join a team of 8 developers working on the new Trade Capture and PnL platform which is written in Java17 and utilises Kubernetes, Kafka and Calypso. The goal of the project is to migrate all trade capture, lifecycle and PnL functionality from the existing legacy tech stack on to the new platform. Responsibilities * Develop and maintain high-performance Java applications * Deliver a result that will require little if any developer involvement post go-live * Troubleshoot and optimise code to ensure efficiency and scalability * Provide 3rd level...
IR35 Status:
Unknown Status

CV-Library London, UK Contractor
CL
Jul 03, 2025  
FPGA Engineer
Job Title: FPGA Design Engineer (Contract) Location: London (Hybrid) Duration: 6 Months Rate: Competitive (Outside IR35) Overview: We're seeking a hands-on FPGA Design Engineer to support a high-performance data transfer project. The role involves working on FPGA-based systems with a focus on throughput, reliability, and integration within a larger hardware-software environment. Key Skills: * Solid FPGA development experience * VHDL or Verilog (SystemVerilog a plus) * Knowledge of high-speed interfaces (e.g., PCIe, DDR, Ethernet) To Apply: Submit your CV below
IR35 Status:
Outside IR35

CV-Library London, UK Contractor
CL
May 16, 2025  
BMS Commissioning Engineer
We have a fantastic contract opportunity for an experienced BMS Commissioning Engineer to join an exciting project in London. On offer is an initial 6 month contract (with the potential to extend), £300 - £340 per day, and the opportunity to work for a successful BMS integration business. The BMS Commissioning Engineer position: - As a BMS Commissioning Engineer, you will have fantastic experience and knowledge of commissioning Building Management Systems, in particular Tridium N4 systems and/or Easy IO.  You will be required to perform software modifications, writing, and generating graphics, working alongside a team engineers. You will be experienced with Commissioning main plant for example air handling units, plate heat exchangers and pumps. Key skills of the BMS Commissioning Engineer: - Exceptional technical knowledge and experience of the BMS sector. Proven experience commissioning BMS systems Qualifications and experience with Tridium N4 systems and/or Easy IO. Ability...
IR35 Status:
Unknown Status

CV-Library London, UK Contractor
CL
Mar 08, 2025  
BMS Commissioning Engineer
We have a fantastic contract opportunity for an experienced BMS Commissioning Engineer to join an exciting project in London. On offer is an initial 3 to 6  month contract (with the potential to extend), £300 - £340 per day (outside IR35), and the opportunity to work for a successful BMS integration business. The BMS Commissioning Engineer position: - As a BMS Commissioning Engineer, you will have fantastic experience and knowledge of commissioning Building Management Systems, in particular Trend and Tridium systems.  You will be required to perform software modifications, writing, and generating graphics, working alongside a team engineers. Key skills of the BMS Commissioning Engineer: - Exceptional technical knowledge and experience of the BMS sector. Proven experience commissioning BMS systems Qualifications and experience with Trend and Tridium or Delta Ability to write and manipulate software and graphics. CSCS Skill card or equivalent Benefits of the BMS Commissioning...
IR35 Status:
Outside IR35

CV-Library London, UK Contractor
CL
Mar 08, 2025  
BMS Commissioning Engineer
BMS Commissioning Engineer Contract We have a fantastic contract opportunity for an experienced Tridium BMS Commissioning Engineer to join an exciting and prestigious project in London. On offer is an initial 6 month contract (with the potential to extend), c£40 - £48 per hour, and the opportunity to work on one of London’s most interesting new projects in central London The BMS Commissioning Engineer position:- As a BMS Commissioning Engineer, you will have fantastic experience and knowledge of commissioning Building Management Systems, in particular Tridium Niagara.  You will be required to perform software modifications and full commissioning. The project is in central London and is a very prestigious refurbishment of a historical building. The project is a mixed use development incorporating a hotel, high end luxury residences, and shops and will be using state of the art new smart building technology. Key skills of the BMS Commissioning Engineer:- Exceptional technical...
IR35 Status:
Outside IR35

CV-Library London, UK Contractor
CL
Jul 12, 2025  
Structural Design Engineer
Attention all Structural Design Engineers! We are looking for a motivated Structural Design Engineer to join a well-established engineering consultancy, in a contract position, outside IR35. You will be required to work on a hybrid basis, working 3 days a week from our client's office in London. This is a great opportunity to work on an exciting commercial project, with an experienced team. -Hourly rate between £40.00-43.00, depending on experience. Key Responsibilities: -Produce structural analyses, calculations and CAD/BIM drawings using Tekla, Tedds, Robot, etc. -Coordinate with architects, contractors and other stakeholders to refine designs. -Conduct site inspections and ensure compliance with UK building regulations. -Mentor junior engineers and contribute to design reviews. What we are looking for: Essential: - A degree in Civil or Structural Engineering (or equivalent). -Must have exceptional steelwork experience. -Proficiency in structural analysis and design...
IR35 Status:
Outside IR35

CV-Library City of London, London Contractor
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