1 to 25 of 65 Contract Software Engineering Jobs in London

Senior ML Infrastructure Engineer Robotics

Hiring Organisation
Harnham - Data & Analytics Recruitment
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£600 - £1,000 per day
Infrastructure Engineer (Robotics) LondonContract, Outside IR35£600-1000 per dayPrimarily onsite Overview We are partnering with a robotics and AI company building the core software infrastructure that enables advanced AI models to operate reliably in real-world robotic systems. They are looking for a Senior ML Infrastructure Engineer … design, build, and optimise the training and inference platforms at the heart of their technology. This is a hands-on engineering role focused on scale, performance, and reliability. You will work across the full machine learning lifecycle, from distributed training pipelines to highly optimised inference systems deployed into production ...

Contract Senior Software Engineer - eDV Cleared

Hiring Organisation
Searchability NS&D
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£500 - £750 per day
CONTRACT SENIOR SOFTWARE ENGINEER - eDV CLEARED NEW CONTRACT JOB OPPORTUNITY AVAILABLE WITHIN A LEADING NATIONAL SECURITY COMPANY FOR A SENIOR SOFTWARE ENGINEER WITH eDV CLEARANCE Contract job opportunity for a Senior Software Engineer Globally leading defence/cyber security company £500 - £750 per day (inside and outside … IR35 roles available) London based organisation in an easily accessible location Contract Senior Software Engineer To apply please call or email WHO WE ARE? We are recruiting multiple contract Senior Software Engineers to work with various clients in London ranging from R&D companies, Multi-National Consultancies ...

Agentic AI Technical Lead

Hiring Organisation
Computer Futures
Location
City of London, London, United Kingdom
Employment Type
Contract
Contract Rate
£550/day
Factory. Deep technical understanding of GenAI tools, such as GPT models, and Agentic AI frameworks, such as Langgraph & Langchain, required. Strong full stack/software engineering skills also preferable. To provide technical leadership for a team of ~15 Capgemini Invent technical developers across data science, software engineering ...

AI / ML Architect

Hiring Organisation
Stackstudio Digital Ltd
Location
London, United Kingdom
Employment Type
Contract, Work From Home
Contract Rate
From £450 to £500 per day
applications. Experiment with algorithms and optimize hyperparameters for performance. Data Preparation Collect, clean, and preprocess large datasets for training and validation. Implement feature engineering and data augmentation techniques. Integration & Deployment Develop APIs or services to integrate ML models into production systems. Work with MLOps tools for model deployment, versioning … Evaluate models using metrics like accuracy, precision, recall, F1-score. Optimize models for scalability, latency, and resource efficiency. Collaboration Work closely with data scientists, software engineers, and product teams to translate business requirements into ML solutions. Document workflows and maintain reproducibility. Research & Innovation Stay updated with the latest ...

Head of Mobile Engineering & Architecture - React & AWS

Hiring Organisation
Sanderson Recruitment
Location
City of London, London, United Kingdom
Employment Type
Contract
Contract Rate
£700 - £900 per day + Outside IR35
Head of Mobile/Head of Mobile Engineering/Head of Mobile Technology/Mobile Technology Director/Head of Mobile Architecture Overview: Really excited to be sharing this outstanding opportunity, we've partnered with a leading UK FS/FinTech client, trusted by million's of users … help shape and deliver this transformation programme where you will play an absolutely critical role. You will be working closely with the Head of Engineering to shape modern Mobile and Web technology that will transform how people invest and manage their finances. There wont be any line management involved ...

Head of Mobile Engineering & Architecture - React & AWS

Hiring Organisation
Sanderson
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£700 - £900 per day
Head of Mobile/Head of Mobile Engineering/Head of Mobile Technology/Mobile Technology Director/Head of Mobile Architecture Overview: Really excited to be sharing this outstanding opportunity, we've partnered with a leading UK FS/FinTech client, trusted by million's of users … help shape and deliver this transformation programme where you will play an absolutely critical role. You will be working closely with the Head of Engineering to shape modern Mobile and Web technology that will transform how people invest and manage their finances. There wont be any line management involved ...

Senior Go Developer

Hiring Organisation
Fruition Group
Location
London, United Kingdom
Employment Type
Contract
Senior Go Developer London, UK 6 Month Contract An incredible opportunity for an experienced Senior Go Developer with strong backend engineering skills to join a prestigious tech client on a contract basis. Known for its high bar for engineering quality, this isn't your typical banking or fintech … design and implementation to optimisation and release. You'll be working in an open, fast-moving environment where ideas get tested quickly and good engineering practices are taken seriously. If you like seeing your work go live within days - not weeks - you'll fit right in. Contractors are treated ...

Java Developer - AI/LLM

Hiring Organisation
Harvey Nash
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£500 - £700 per day
Developer - AI/LLM - sought by trading company based in London - Contract (Remote option available for outstanding candidates) What We're Looking For Backend Engineering Expertise 8+ years of software engineering experience with strong Java backend skills. Proven track record in modernising production systems and designing APIs … GitHub Copilot) and Model Context Protocol (MCP). Experience integrating AI into CI/CD pipelines and building AI-powered automation. Knowledge of prompt engineering, model selection, and LLM capabilities. Proven AI Impact Demonstrated success in using AI to improve productivity and code quality. Experience with AI-assisted refactoring ...

Java Developer - AI first development

Hiring Organisation
Harvey Nash
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£600 - £700 per day
first - sought by trading company based in London - Contract (OUTSIDE IR35 - Remote option available for outstanding candidates) What We're Looking For Backend Engineering Expertise 8+ years of software engineering experience with strong Java backend skills. Proven track record in modernising production systems and designing APIs/… GitHub Copilot) and Model Context Protocol (MCP). Experience integrating AI into CI/CD pipelines and building AI-powered automation. Knowledge of prompt engineering, model selection, and LLM capabilities. Proven AI Impact Demonstrated success in using AI to improve productivity and code quality. Experience with AI-assisted refactoring ...

AI/ML Architect

Hiring Organisation
Stott & May Professional Search Limited
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£460 - £510 per day
real-world value from data by architecting models, pipelines, and integration patterns that scale across the organisation. This role combines technical depth, applied ML engineering, solution design, and hands-on development. Key Responsibilities Design, build, and train end-to-end machine learning models across NLP, predictive analytics, classification … Experiment with algorithms, optimise hyperparameters, and evaluate model performance Collect, process, and prepare structured and unstructured datasets for model training and validation Implement feature engineering, data augmentation, and data quality controls Develop APIs, services, or microservices to integrate models into production platforms Deploy, monitor, and manage models using MLOps ...

Site Reliability Engineer

Hiring Organisation
JAM Recruitment Ltd
Location
South West London, London, United Kingdom
Employment Type
Contract
Contract Rate
£500 - £550 per day + Umbrella, inside IR35
ensuring performance, availability, and scalability-while driving continuous improvement and innovation. About the Role As an SRE, you'll combine your operational expertise with software engineering skills to minimise manual effort and drive automation across complex systems. This role is perfect for someone who thrives on solving hard … interested in your curiosity, enthusiasm, and problem-solving ability than ticking every box. However, experience in any of the following areas would be advantageous: Software development in web technologies or OOP (e.g., Python, Java, etc.) Database tech: Oracle SQL, PostgreSQL, MongoDB Proficient with Linux/Windows command line (Bash ...

Databricks Data Engineer

Hiring Organisation
Harnham - Data & Analytics Recruitment
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£500 - £600 per day
building and maintaining large-scale, real-time data pipelines that power analytics, machine learning, and operational systems across the business. You'll collaborate with software engineers, data scientists, and analytics teams to ensure the platform delivers reliable, high-quality, and compliant data at scale. This is a hands … engineering role that blends software craftsmanship with data architecture expertise. Key responsibilities: Design and implement high-throughput data streaming solutions using Kafka, Flink, or Confluent. Build and maintain scalable backend systems in Python or Scala, following clean code and testing principles. Develop tools and frameworks for data governance ...

Integration Engineer (Powershell / C#)

Hiring Organisation
Morson Edge
Location
New Malden, London, United Kingdom
Employment Type
Contract
Contract Rate
£0.00 - 67.70 per hour + Inside IR35
title: Software Integration Engineer – Automation (Powershell/C#) Location: New Malden (3 days onsite/2 days remote) Rate: £67.70ph inside IR35/Umbrella Duration: 12 months What you'll be doing: • Providing technical leadership by taking ownership of complex automation solutions, engaging with stakeholders and end users. • Review … expertise to members of other teams • Provision of support and oversight for the work of other team members • Design solutions for deploying and configuring software and systems • Develop and maintain software relating to automation of system build and deployment • Perform investigations and identify appropriate solutions to emerging issues ...

Senior Go Developer

Hiring Organisation
Fruition Group
Location
London, United Kingdom
Employment Type
Contract, Work From Home
opportunity for a highly skilled Senior Go Developer to join a leading technology business on a contract basis. This organisation is recognised for its engineering excellence and is seeking a Senior Go Developer to help scale distributed systems and deliver high-performance solutions. In this role, the Senior … Developer will design, develop, and implement data-intensive applications across the full engineering lifecycle. You'll architect and deliver microservices-based systems using Go (Golang), AWS, Kubernetes, Docker, and Kafka, working closely with cross-functional teams to build scalable, reliable, and resilient platforms. You'll also play ...

Techncial Delivery Lead

Hiring Organisation
Hays Technology
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£550 - £650/day £550-£650 Inside IR35
Rust and the ability to validate code. Experience with other languages accepted, e.g. C++, Zig, Nim or Python. Previous experience as a developer or software engineer. Background in data platforms or cybersecurity systems is desirable. Comfortable working in Agile environments and managing delivery on complex projects. ...

Senior Software Engineer

Hiring Organisation
Additional Resources
Location
Westminster, City of Westminster, Greater London, United Kingdom
Employment Type
Contract
Contract Rate
£500 - £700/day
exciting opportunity has arisen for a Senior Software Engineer to join a well-established biotech company using large-scale genetic data and AI to predict disease risk and advance precision healthcare. As a Senior Software Engineer , you will be contributing to the development and scaling of secure, reliable … software in a collaborative, agile environment. This is a contract-based role (12 weeks) offering hybrid/remote working options, a salary range of £500 - £700 per day (Inside IR35) and benefits. You will be responsible for: Building and scaling new software products within an agile squad. Supporting ...

Senior Software Engineer

Hiring Organisation
Additional Resources Ltd
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£500 - £700 per day
exciting opportunity has arisen for a Senior Software Engineer to join a well-established biotech company using large-scale genetic data and AI to predict disease risk and advance precision healthcare. As a Senior Software Engineer , you will be contributing to the development and scaling of secure, reliable … software in a collaborative, agile environment. This is a contract-based role (12 weeks) offering hybrid/remote working options, a salary range of £500 - £700 per day (Inside IR35) and benefits. You will be responsible for: Building and scaling new software products within an agile squad. Supporting ...

Integration Engineer

Hiring Organisation
JAM Recruitment Ltd
Location
New Malden, London, United Kingdom
Employment Type
Contract, Work From Home
Contract Rate
£60.00 - £67.70 per hour
expertise to members of other teams Provision of support and oversight for the work of other team members Design solutions for deploying and configuring software and systems Develop and maintain software relating to automation of system build and deployment Perform investigations and identify appropriate solutions to emerging issues … Keep up to date in relevant technologies The Candidate Essential: Experience of working with large complex systems, ideally in the naval sector Background in software engineering PowerShell or C# VM Ware and virtualisation techniques Desirable: Techniques for automation of installation and deployment software Experience of strong configuration ...

ServiceNow Developer - 12 month contract

Hiring Organisation
Opus Recruitment Solutions Ltd
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
Salary negotiable
type of clearance previously that is an extra bonus. Role Requirements: JavaScript ServiceNow experience Experience with automation CI/CD pipeline Bonus: Degree in Software Engineering related field If you are interested in this role, please apply or email your latest CV to ASAP!Please note that ...

ServiceNow Developer - 12 month contract

Hiring Organisation
Opus Recruitment Solutions Ltd
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
Salary negotiable
type of clearance previously that is an extra bonus. Role Requirements: JavaScript ServiceNow experience Experience with automation CI/CD pipeline Bonus: Degree in Software Engineering related field If you are interested in this role, please apply or email your latest CV to ASAP!Please note that ...

Machine Learning Engineer

Hiring Organisation
mthree
Location
EC4M, Old Bailey, Greater London, United Kingdom
Employment Type
Permanent, Contract
GANs, VAEs, Diffusion models) Programming & Tools : Expert-level Python programming Proficiency with ML frameworks (PyTorch, TensorFlow, JAX) Experience with scikit-learn, XGBoost, LightGBM Strong software engineering practices and clean code principles Data & Computing : Experience with big data technologies (Spark, Dask) SQL and NoSQL databases Cloud platforms ...

API Security Architect

Hiring Organisation
KBC Technologies UK LTD
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
Competitive salary
Jira (task & project management) Confluence (formal documentation) Excellent written documentation skills (this is strongly emphasised) 6. Certifications & Background (Expected) Degree in: Cybersecurity, Computer Science, Software Engineering (or equivalent experience) CISSP or CISM (or equivalent senior-level certs) Networking/infrastructure certifications are a strong plus ...

Back End Integration Engineer

Hiring Organisation
VIQU IT Recruitment
Location
City of London, London, United Kingdom
Employment Type
Contract
Contract Rate
£400 - 500 per day + Inside IR35
development (e.g. C#, Python) with a strong focus on secure coding practices. Hands-on experience with CI/CD pipelines, automated testing and modern software engineering practices. Strong analytical and problem-solving skills, with the ability to work effectively across technical and business teams. Good understanding of data ...

Back End Integration Engineer

Hiring Organisation
VIQU IT
Location
London, Broad Street, United Kingdom
Employment Type
Contract
Contract Rate
£400 - £500/day Inside IR35
development (e.g. C#, Python) with a strong focus on secure coding practices. Hands-on experience with CI/CD pipelines, automated testing and modern software engineering practices. Strong analytical and problem-solving skills, with the ability to work effectively across technical and business teams. Good understanding of data ...

Back End Integration Engineer

Hiring Organisation
VIQU IT Recruitment
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£400 - £500 per day
development (e.g. C#, Python) with a strong focus on secure coding practices. Hands-on experience with CI/CD pipelines, automated testing and modern software engineering practices. Strong analytical and problem-solving skills, with the ability to work effectively across technical and business teams. Good understanding of data ...