Lead Software Engineer Python Java Jobs in London, UK

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Hybrid Mobile QA Engineer React Native, AI Testing

A leading digital technology consultancy in Greater London seeks a QA Engineer to ensure high-quality digital experiences. The role involves designing tests, building automation packs, and performing testing across non-functional areas like Accessibility and Security. Ideal candidates are detail-oriented individ ...

Gen AI Engineer: Production LLMs & RAG (London)

A leading firm in Financial Services is seeking an AI Engineer for a 6-month contract with potential extensions. The role involves hands-on implementation of Gen AI solutions, optimizing models, and collaborating with cross-functional teams. Candidates should have experience in financial services and a strong ba ...

Azure GenAI Engineer: RAG & Agent AI Pipelines

A leading tech consulting firm in the City Of London is seeking an experienced Azure GenAI Engineer to develop and scale intelligent applications. The role involves hands-on work with Azure's AI stack and modern frameworks, including Python and FastAPI. The ideal candidate will have expertise in AI/ML model deve ...

ML Data Quality Engineer: Audio & Speech

Cantina Labs is seeking an ML Engineer focused on Data Quality to own the datasets that power our speech systems. This role involves auditing, filtering, and labeling audio and text data to improve model performance. Candidates should have strong experience in building ML-driven data quality systems, be proficie ...

Remote ML Engineer: Equity & Low Latency Ranking

Phoenix Court Group in Greater London seeks a skilled Machine Learning Engineer. You will play a key role in architecting and maintaining production-grade ML services, collaborating with teams to solve complex challenges. The ideal candidate has solid expertise in machine learning techniques, strong Python skill ...

Senior Data Engineer — Pipelines & Warehousing

A leading retail brand in London is seeking a Staff Data Engineer to enhance their data transformation efforts. You will build and maintain data pipelines, support data-driven decision-making, and mentor junior team members. The ideal candidate has expertise in Python, Azure, and Spark, and will play a key role ...

Mid Senior DevOps Engineer – Trading Infrastructure

A global hedge fund in London is seeking a highly skilled Dev Ops Engineer to ensure the stability and performance of their research and trading infrastructure. The candidate will be responsible for monitoring production systems and implementing improvements. Ideal applicants will have over 5 years of experience ...

ML Research Engineer: Production Models & R&D

Miro is searching for a Machine Learning Research Engineer in London. The role involves designing and deploying ML models, conducting exploratory research, and collaborating with teams to integrate models into products. Candidates should have a strong foundation in machine learning and statistics, deep proficien ...

Senior Perception & Autonomy Systems Engineer

A leading electric vehicle manufacturer based in Greater London seeks an experienced Perception Engineer. The role involves developing machine learning algorithms that directly impact safety-critical self-driving features. Candidates should have a strong background in C++ and Python, along with extensive experie ...

Quantitative Data Scientist Research & Feature

Point72 Asset Management, L.P is seeking a Data Scientist to bridge the gap between raw data and predictive modelling. This role will involve close collaboration with the quantitative research team to engineer features for systematic models. You will conduct data analysis, generate ideas for proprietar ...

Principal Engineer, Global Payroll Data & Integrations

Deepstreamtech is looking for a Principal Engineer to oversee the lifecycle of payroll data and design a bitemporal calculation engine. Ideal candidates will have strong expertise in Python and Node.js/TypeScript, with experience in ETL processes and financial data systems. Located in London (preferred), the rol ...

Senior AI Engineer LLMs, MLOps & Responsible AI

ASOS.com is seeking a Senior AI Engineer to develop AI-driven solutions for millions of customers. This role involves designing robust AI systems using large language models and generative AI, partnering with teams for effective AI development, and applying MLOps principles to ensure reliable delivery. Candidate ...

Senior Full Stack Engineer – AI Systems (London, Hybrid, Equity)

SR2 REC LTD is seeking a Senior Full Stack Engineer to design and build high-quality backend systems using Python and create scalable frontend architecture with React and TypeScript. The role is hybrid based in London, offering a salary of £120,000 to £140,000 plus equity. Ideal candidates are those who enjoy ta ...

Senior Firmware Engineer: V2G & Edge on Embedded Linux

Stars Arena is looking for a Senior Firmware Engineer to join their London team. The successful candidate will develop firmware for V2G edge devices and integrate systems with cloud backends while ensuring optimal performance on embedded Linux platforms. Applicants should have strong scripting skills in Python a ...

Generative AI Engineer — Secure Prototyping & Deployment

A leading cybersecurity services company is seeking a Generative AI Engineer to design and implement innovative AI solutions. The role involves fine-tuning generative AI models, optimizing prompts, and ensuring secure deployment. Candidates should have strong knowledge in AI architectures and Python coding skill ...

Machine Learning Research Engineer (LLM & AI Agents)

Machine Learning Research Engineer (LLM & AI Agents) Contract length: 6 months with potential to extend Location: Hybrid 3 days per week in King's Cross We are hiring a Machine Learning Research Engineer to join a high-performing AI research group working at ...

Lead AI Tester / QA Lead (LLM & GenAI)

We’re supporting a consulting partner on the search for a Lead AI Tester / QA Lead to define and own the testing strategy for several AI / LLM use cases at a major financial services client. This role is primarily about strategy, governance and delegation, with some scope to remain hands‑on. <p ...

Lead AI Tester / QA Lead (LLM & GenAI)

We’re supporting a consulting partner on the search for a Lead AI Tester / QA Lead to define and own the testing strategy for several AI / LLM use cases at a major financial services client. This role is primarily about strategy, governance and delegation, with some scope to remain hands‑on. Learn ...

Senior/Principal Mechanical Engineer

Senior / Principal Mechanical EngineerLondon £55,000 – £70,000 + BenefitsA well-established multi-disciplinary building services consultancy is seeking an experienced Senior / Principal Mechanical Engineer to join its growing engineering team. This is an excellent opportunity for a technically st ...

Solace Middleware Engineer

Solace Middleware Engineer London based £550-700/day umbrella Hybrid I'm currently supporting a leading Bank in their search for an experienced Solace Middleware Engineer to support their Front Offi ...

Technical Sourcing Program Manager

At Medtronic you can begin a life-long career of exploration and innovation, while helping champion healthcare access and equity for all. You’ll lead with purpose, breaking down barriers to innovation in a more connected, compassionate world.A Day in the LifeThe Technical So ...

Technical Sourcing Program Manager

At Medtronic you can begin a life-long career of exploration and innovation, while helping champion healthcare access and equity for all. You’ll lead with purpose, breaking down barriers to innovation in a more connected, compassionate world.A Day in the LifeThe Technical So ...

Quantum Algorithms Engineer

Phasecraft is the quantum algorithms company. We are building the mathematical foundations for quantum computing applications that solve real-world problems. Founded in 2019 by Toby Cubitt, Ashley Montanaro and John Morton, we are based in London and Bristol, UK. In 2023 we completed a £13m Series A funding r ...

Senior Full Stack Engineer

Humanoid is the first AI and robotics company in the UK, creating the world’s most advanced, reliable, commercially scalable, and safe humanoid robots. Our first humanoid robot HMND 01 is a next-gen labour automation unit, providing highly efficient services across various use cases, starting with industrial ...

Quantum Algorithms Engineer

Phasecraft is the quantum algorithms company. We are building the mathematical foundations for quantum computing applications that solve real-world problems. Founded in 2019 by Toby Cubitt, Ashley Montanaro and John Morton, we are based in London and Bristol, UK. In 2023 we completed a £13m Series A funding r ...

Data Engineer | Dynamic Tier 1 Investment Management Firm

This range is provided by Selby Jennings. Your actual pay will be based on your skills and experience — talk with your recruiter to learn more. Base pay range Direct message the job poster from Selby Jennings We are on the lookout for a talented Data Engineer to join a high performing f ...

Electrical Engineer

Electrical Engineer – Solar, BESS & New Technologies London / Hybrid Up to £50,000 + Bonus An exciting opportunity has arisen for an Electrical Engineer to join a fast-growing renewable energy developer delivering utilit ...

Electrical Engineer

Electrical Engineer – Solar, BESS & New Technologies London / Hybrid Up to £50,000 + Bonus While professional experience and qualifications are key for this role, make sure to check you have the preferable soft skills before appl ...

Founding Engineer

Founding Engineer Like the look of this opportunity Make sure to apply fast, as a high volume of applications is expected Scroll down to read the complete job description.I am supporting a well funded early stage AI startup building real time coaching technology embedded directly into li ...

Building Management Systems Engineer

BMS Software Engineer - Remote Working Are you a skilled BMS Software Engineer looking for your next challenge with the flexibility of remote working? This is an opportunity to join a forward-thinking engineering team delivering cutting-edge building automation solutions across high- ...

Risk Lead in London Lithe Consulting Ltd

Risk LeadLondon, UnitedKingdomTech stackPythonCJob Description...an SME background, or else be sat in a large corporate and wishing they were at an SME!We're after someone who is comfortable with Python cod ...

Cloud Security Engineer

Cloud Security Engineer The successful candidate will be a subject matter expert with hands‑on experience in a wide range of cloud technologies, tools and methodologies. The role is suited for an experienced Cloud Engineer with proven understanding in enterprise security and will focus on buildin ...

Platform Engineer

Get AI-powered advice on this job and more exclusive features. This range is provided by Switch Tech Talent. Your actual pay will be based on your skills and experience — talk with your recruiter to learn more. Base pay range Direct message the job poster from Switch Tech Talent <h3 ...

Technical Lead Shape Digital Transformations & Lead Teams

A leading consultancy firm in Greater London seeks a skilled software engineering leader to manage cross-functional teams and drive successful digital transformations for clients. This role requires expertise in the software delivery lifecycle, team management, and proven abilities in client interactions. You wi ...

Media Lead / Associate Director Remote Strategy Lead

A leading content agency in London is seeking a Media Lead to oversee innovative campaign strategies across multiple platforms. This role requires in-depth knowledge of paid social ads managers, strong client relations, and a drive for performance excellence. You'll lead a team focused on delivering high-quality ...

Lead Litigation Lawyer & Team Lead (Financial Services)

Vanquis is looking for a qualified Litigation Lawyer for their team in the UK. This leadership role requires at least 3 years of PQE in financial litigation and a passion for people development. Responsibilities include managing a team of paralegals, ensuring compliance with legal standards, and improving litiga ...

Lead AI Tester / QA Lead (LLM & GenAI)

We’re supporting a consulting partner on the search for a Lead AI Tester / QA Lead to define and own the testing strategy for several AI / LLM use cases at a major financial services client. This role is primarily about strategy, governance and delegation, with some scope to remain hands‑on. <p ...

Product Security Lead Senior Lead Cybersecurity Architect

Out of the successful launch of Chase in 2021, we’re a new team, with a new mission. This is an excellent opportunity to join a world class Cybersecurity organization. As a Product Security Lead (PSL) in the Cybersecurity & Technology Controls (CTC) team for the International Consumer, you will wor ...

Artificial Intelligence Engineer

Founding AI Engineer | Python, LLMs, RAG | VC-Backed PropTech Rebuilding How People Rent and Buy Salary: £100,000 - £120,000 + equity Location: London (Hoxton) – 5 days/week in-office I’m working wit ...

Artificial Intelligence Engineer

Founding AI Engineer | Python, LLMs, RAG | VC-Backed PropTech Rebuilding How People Rent and Buy In order to make an application, simply read through the following job description and make sure to attach relevant documents.Salary: £100,000 - £120, ...

Staff Data Engineer

Staff Data Engineer Joining one of the best-known retail brands in the UK as a Staff Data Engineer, you will support the delivery of data transformation during an exciting time within the company. They are looking for someone with experience in building and maintaining data pipelines and collabor ...

Microsoft Cloud Native Lead

Roles: Microsoft Cloud Native Lead.Location: London, UKDuration : Contract – 6-12 monthsIs it Onsite/Remote/Hybrid: Hybrid</strong ...

Microsoft Cloud Native Lead

Roles: Microsoft Cloud Native Lead.Location: London, UKDuration : Contract – 6-12 monthsIs it Onsite/Remote/Hybrid: Hybrid</strong ...

Principal Engineer Digital Health Products

Overview We are hiring a Principal Engineer to join a new team working on initiatives and projects which will use the Our Future Health resource to provide personalised, actionable health insights (such as basic calculated disease risk scores and more advanced Polygenic and Integrated Risk scores) ...

Senior Automation QA Engineer (Data Engineering)

Senior Automation QA Engineer (Data Engineering)Location: London or Cardiff - once a month in the officeSalary/Rate: £500 / 600 per day inside IR35Start Date: 05/05/2026Job Type: ContractWe are seeking a Senior Automatio ...

Principal Engineer

Principal Engineer - Series A Scale Up - Up to £270,000 Ready to apply Before you do, make sure to read all the details pertaining to this job in the description below.I'm currently looking for a Principal Engineer to join a high-growth, YC-backed AI ...

Solace Middleware Engineer

Solace Middleware Engineer London based £550-700/day umbrella Hybrid I'm currently supporting a leading Bank in their search for an experienced Solace Middleware Engineer to support their Front Offi ...

Managing Consultant EIA Flood Risk Specialist

Role OverviewAs a Managing Consultant, EIA Hydrologist / EIA Flood Risk Specialist, you will lead technical delivery for flood risk assessments and outline drainage design within Environmental Impact Assessments (EIA) and planning applications. This role combines advanced technical expertis ...

Managing Consultant EIA Flood Risk Specialist

Role OverviewAs a Managing Consultant, EIA Hydrologist / EIA Flood Risk Specialist, you will lead technical delivery for flood risk assessments and outline drainage design within Environmental Impact Assessments (EIA) and planning applications. This role combines advanced technical expertis ...

Data Scientist: Insight Driven ML and Analytics Leader

AWTG Ltd is seeking a Data Scientist to apply data science, statistics, and machine learning techniques to generate insights and develop solutions for clients. This role will involve collaboration with teams across data, AI, software engineering, and delivery to create impactful outcomes. Key responsib ...

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