Lead Software Engineer Python Java Jobs in London, UK

Professional job seekers finding United Kingdom jobs through Expertini
750,000+ professionals on Expertini 750,000+ Candidates
Join our global community
Expertini Penguin Mascot Resume Score™
Resume Score™ Instantly
Upload Your CV
Quick 30-second process

Apply Today & Jumpstart Your Career on Expertini, Trusted Since 2008.

Reset

Create Job Alert

 
   
Reset

SC Cleared Java Dev: Java 17+, AWS & Angular (Hybrid)

Java Script Works is seeking a skilled Java Developer with Active SC Clearance, proficient in Java 17+, Spring/Spring Boot, Angular, and AWS. This role, based in London, offers a competitive rate of up to £420 per day (Inside IR35) and supports a hybrid working environment. The ideal candidate will hav ...

Senior Python Backend Engineer AI/ML, Hybrid London

Synechron is seeking a Senior Python Software Engineer in London for a hybrid role. You will architect and implement scalable backend systems for advanced AI/ML tools, emphasizing Python expertise and software design principles. The position offers opportunities for innovative AI product development within a dyn ...

Senior Python Backend Engineer AI/ML, Hybrid London

Synechron is seeking a Senior Python Software Engineer in London for a hybrid role. You will architect and implement scalable backend systems for advanced AI/ML tools, emphasizing Python expertise and software design principles. The position offers opportunities for innovative AI product development within a dyn ...

Junior Platform / System Engineer

Team / Role As a Platform Engineer, you will: Act as infrastructure SME for a 24x7x365 globally distributed ethical web scraping function, supporting a multi region high frequency operation Be able to proactively analyze, drive, and own, performance and process impro ...

Fullstack and Devops

Looking for high calibre, deeply experienced, hands‑on Fullstack DevSecOps engineer who seeks to be recognized as platform technology leader. Role Summary Senior DevOps engineer experienced with excellent comprehension of modern engineering from toolsets to methods, practices to technolog ...

Blockchain Engineer

We specialise in the recruitment of high quality candidates in the Blockchain sector. We have an excellent opportunity for a skilled Blockchain Engineer on a remote basis. The role holder will develop applications solutions and smart contracts. Remote Contract, 6-12 months: £130,000 - £180,000 (p ...

Senior Software Engineer (Backend) in London LinuxRecruit

Senior Software Engineer (Backend) London, United Kingdom Posted 10 months ago Tech Stack Python Software Engineer API Express Azure TypeScript Artificial Intelligence Backend Re ...

Software Engineer (UK/Europe) in London Unibuddy

Software Engineer (UK/Europe) London, United Kingdom Posted 9 months ago Tech stack UI TypeScript Python Accessibility GraphQL Amazon AWS MongoDB Software Engineer NestJS < ...

Software Engineer Early Stage start up in London LinuxRecruit

Software Engineer - Early Stage start up Location: London, United Kingdom Compensation: £75K - 85K Role Type: Full time Visa Sponsorship: Not provided Benefits & Perks: (None listed) Tech Stack APIs Python Software Engine ...

Cloud Platform Engineer: Full Stack AWS Microservices

Cloud Software Engineer London, United Kingdom Posted 9 months ago JPMorgan Chase & Co. Tech stack Amazon AWS TypeScript Spring Boot Microservices React Java Databases Cloud Spring Framew ...

Cloud Software Engineer in London JPMorgan Chase & Co.

Cloud Software Engineer London, United Kingdom Posted 9 months ago JPMorgan Chase & Co. Tech stack Amazon AWS TypeScript Spring Boot Microservices React Java Databases Cloud Spring Framew ...

Senior Software Engineer (UK) in London MineHub

Senior Software Engineer (UK) Location: London, United Kingdom Posted: 10 months ago This is a job posted by our partner Jooble Tech stack Architecture Python refactoring TypeScript Software Engineer Performance tunin ...

Senior Software Engineer (UK) in London MineHub

Senior Software Engineer (UK) Location: London, United Kingdom Posted: 10 months ago This is a job posted by our partner Jooble Tech stack Architecture Python refactoring TypeScript Software Engineer Performance tunin ...

Cloud DevOps Engineer

When we begin discussing the DevOps engineer job description, we may begin by saying that the role of a DevOps engineer is critical to the projects overall success, right from planning to support primary KPI as customer satisfaction and productivity. A DevOps Engineer Expert has an essential role in integr ...

Cloud DevOps Engineer

When we begin discussing the DevOps engineer job description, we may begin by saying that the role of a DevOps engineer is critical to the projects overall success, right from planning to support primary KPI as customer satisfaction and productivity. A DevOps Engineer Expert has an essential role in integr ...

Senior Software Engineer Oracle Infra

Senior Software Engineer - Oracle Infra Location London Business Area Engineering and CTO Ref # **Description & Requirements** Bloomberg is the industry standard for financial data. Bloomberg's software solutions depend on robust data infrastructu ...

Senior Software Engineer Oracle Infra

Senior Software Engineer - Oracle Infra Location London Business Area Engineering and CTO Ref # **Description & Requirements** Bloomberg is the industry standard for financial data. Bloomberg's software solutions depend on robust data infrastructu ...

Senior DevOps Engineer

Crown Agents Bank is a vastly growing and regulated UK bank that connects emerging and frontier markets to the rest of the world, using FX and payments technology. We are transforming the way payments and FX move through emerging markets, reducing friction so that more money gets to those who need it. Emergin ...

FX Risk Platform Lead — Java & In Memory Tech Leader

Citi is looking for a motivated FX Risk Lead Java Developer to join their rapidly growing Markets technology team in London. The role involves designing and developing high-throughput Java microservices, integrating solutions based on Apache Ignite, and implementing real-time data processing pipelines. The ideal ...

VP Lead Java Architect – Real Time FX Risk Tech

Citi is seeking a Lead Java Developer – Vice President for its FX Risk technology team. In this role, you will deliver high-performance Java applications, architect solutions for real-time market data, and leverage cutting-edge AI tools. The position offers an exciting opportunity to work on a greenfield applica ...

Lead Java Backend Architect for AI Driven E commerce

A leading e-commerce personalization platform in the UK seeks a top-notch lead back-end developer. The role involves developing RESTful services and implementing Big Data solutions with strict SLAs. Candidates should have over 10 years of experience in Java development, be proficient with modern web technologies ...

FX eTrading Java Developer — Low Latency Trading Tech Lead

A global financial services company is seeking an experienced professional to implement FX trading systems. This role involves working with trading and quant teams, contributing to system design, and enhancing solution quality. Candidates should have a strong understanding of FX and ultra low-latency development ...

FX eTrading Java Developer — Low Latency Trading Tech Lead

A global financial services company is seeking an experienced professional to implement FX trading systems. This role involves working with trading and quant teams, contributing to system design, and enhancing solution quality. Candidates should have a strong understanding of FX and ultra low-latency development ...

VP Lead Java Architect – Real Time FX Risk Tech

Citi is seeking a Lead Java Developer – Vice President for its FX Risk technology team. In this role, you will deliver high-performance Java applications, architect solutions for real-time market data, and leverage cutting-edge AI tools. The position offers an exciting opportunity to work on a greenfield applica ...

Senior Big Data Analytics Lead: Hadoop, Java, R (London)

TeamBiz is looking for an experienced professional for a senior position focusing on Hadoop, Java, and R. The role requires at least 10 years of experience, specifically in predictive analytics with R. Candidates should have knowledge of the financial domain and ideally experience in wealth management. Responsib ...

FX Risk Platform Lead — Java & In Memory Tech Leader

Citi is looking for a motivated FX Risk Lead Java Developer to join their rapidly growing Markets technology team in London. The role involves designing and developing high-throughput Java microservices, integrating solutions based on Apache Ignite, and implementing real-time data processing pipelines. The ideal ...

Senior Big Data Analytics Lead: Hadoop, Java, R (London)

TeamBiz is looking for an experienced professional for a senior position focusing on Hadoop, Java, and R. The role requires at least 10 years of experience, specifically in predictive analytics with R. Candidates should have knowledge of the financial domain and ideally experience in wealth management. Responsib ...

Sell Side and Post Trade Senior Software Engineer

Requirements 4+ years of software engineering experience required Excellent problem-solving and execution skills JavaScript/Frontend engineering experience Strong unit testing experience (Desirable) Knowledge of the financial trading ecosystem (Des ...

Sell Side and Post Trade Senior Software Engineer

Requirements 4+ years of software engineering experience required Excellent problem-solving and execution skills JavaScript/Frontend engineering experience Strong unit testing experience (Desirable) Knowledge of the financial trading ecosystem (Des ...

Python Developer – Up to £170,000 + Bonus + Benefits

Python Developer – Up to £170,000 + Bonus + Benefits Python Developer – Up to £170,000 + Bonus + Benefits Direct message the job poster from Hunter Bond Principal Consultant / Team Lead at Hunter Bond Salary: Up to £170,000 + Bonus + Full Benefits Package < ...

QA Engineer (AI Applications) (Remote) (London)

About the Project Outlier helps the world’s most innovative companies improve their AI agents by providing human feedback. We collaborate with leading AI organizations to train Large Language Models (LLMs) to function as proactive, multi-step agents. Our projects focus on teaching these systems how to desig ...

Full Stack Developer Home Based (remote)

About the Project Outlier helps the world’s most innovative companies improve their AI agents by providing human feedback. We collaborate with leading AI organizations to train Large Language Models (LLMs) to function as proactive, multi-step agents. Our projects focus on teaching these systems how to desig ...

Full Stack Developer JS Remote

About the Project Outlier helps the world’s most innovative companies improve their AI agents by providing human feedback. We collaborate with leading AI organizations to train Large Language Models (LLMs) to function as proactive, multi-step agents. Our projects focus on teaching these systems how to desig ...

Full Stack Developer, Remote

About the Project Outlier helps the world’s most innovative companies improve their AI agents by providing human feedback. We collaborate with leading AI organizations to train Large Language Models (LLMs) to function as proactive, multi-step agents. Our projects focus on teaching these systems how to desig ...

Freelance Software Engineer (Remote) (London)

About the Project Outlier helps the world’s most innovative companies improve their AI agents by providing human feedback. We collaborate with leading AI organizations to train Large Language Models (LLMs) to function as proactive, multi-step agents. Our projects focus on teaching these systems how to desig ...

LLM Engineer (Remote) (London)

About the Project Outlier helps the world’s most innovative companies improve their AI agents by providing human feedback. We collaborate with leading AI organizations to train Large Language Models (LLMs) to function as proactive, multi-step agents. Our projects focus on teaching these systems how to desig ...

Applied AI Engineer (Agentic AI) Remote (London)

About the Project Outlier helps the world’s most innovative companies improve their AI agents by providing human feedback. We collaborate with leading AI organizations to train Large Language Models (LLMs) to function as proactive, multi-step agents. Our projects focus on teaching these systems how to desig ...

AI Quality Engineer (Remote) (London)

About the Project Outlier helps the world’s most innovative companies improve their AI agents by providing human feedback. We collaborate with leading AI organizations to train Large Language Models (LLMs) to function as proactive, multi-step agents. Our projects focus on teaching these systems how to desig ...

AI Integration Engineer (Remote) (London)

About the Project Outlier helps the world’s most innovative companies improve their AI agents by providing human feedback. We collaborate with leading AI organizations to train Large Language Models (LLMs) to function as proactive, multi-step agents. Our projects focus on teaching these systems how to desig ...

AI Software Engineer (Remote) (London)

About the Project Outlier helps the world’s most innovative companies improve their AI agents by providing human feedback. We collaborate with leading AI organizations to train Large Language Models (LLMs) to function as proactive, multi-step agents. Our projects focus on teaching these systems how to desig ...

Software Developer Work From Home (remote)

About the Project Outlier helps the world’s most innovative companies improve their AI agents by providing human feedback. We collaborate with leading AI organizations to train Large Language Models (LLMs) to function as proactive, multi-step agents. Our projects focus on teaching these systems how to desig ...

Applied AI Engineer (Remote) (London)

About the Project Outlier helps the world’s most innovative companies improve their AI agents by providing human feedback. We collaborate with leading AI organizations to train Large Language Models (LLMs) to function as proactive, multi-step agents. Our projects focus on teaching these systems how to desig ...

MLOps Engineer (Remote) (London)

About the Project Outlier helps the world’s most innovative companies improve their AI agents by providing human feedback. We collaborate with leading AI organizations to train Large Language Models (LLMs) to function as proactive, multi-step agents. Our projects focus on teaching these systems how to desig ...

GenAI Engineer (Remote) (London)

About the Project Outlier helps the world’s most innovative companies improve their AI agents by providing human feedback. We collaborate with leading AI organizations to train Large Language Models (LLMs) to function as proactive, multi-step agents. Our projects focus on teaching these systems how to desig ...

Contract Software Engineer (Remote) (London)

About the Project Outlier helps the world’s most innovative companies improve their AI agents by providing human feedback. We collaborate with leading AI organizations to train Large Language Models (LLMs) to function as proactive, multi-step agents. Our projects focus on teaching these systems how to desig ...

AI Red Team Engineer (Remote) (London)

About the Project Outlier helps the world’s most innovative companies improve their AI agents by providing human feedback. We collaborate with leading AI organizations to train Large Language Models (LLMs) to function as proactive, multi-step agents. Our projects focus on teaching these systems how to desig ...

Full Stack/Back End Developer, Fully Remote

About the Project Outlier helps the world’s most innovative companies improve their AI agents by providing human feedback. We collaborate with leading AI organizations to train Large Language Models (LLMs) to function as proactive, multi-step agents. Our projects focus on teaching these systems how to desig ...

Software Engineer AI Technologies (Remote) (London)

About the Project Outlier helps the world’s most innovative companies improve their AI agents by providing human feedback. We collaborate with leading AI organizations to train Large Language Models (LLMs) to function as proactive, multi-step agents. Our projects focus on teaching these systems how to desig ...

AI Engineer (Remote) (London)

About the Project Outlier helps the world’s most innovative companies improve their AI agents by providing human feedback. We collaborate with leading AI organizations to train Large Language Models (LLMs) to function as proactive, multi-step agents. Our projects focus on teaching these systems how to desig ...

Generative AI Engineer (Remote) (London)

About the Project Outlier helps the world’s most innovative companies improve their AI agents by providing human feedback. We collaborate with leading AI organizations to train Large Language Models (LLMs) to function as proactive, multi-step agents. Our projects focus on teaching these systems how to desig ...

🚀 Boost Your Hiring Chances with Our AI-Powered Tool-Kit

Stand out from thousands of applicants. Use our proven career tools to optimize your applications and land your dream job faster.

To-Do Planner

Organize your job search and personal tasks. All data is confidential.

Open Planner

Wellbeing Center

Access your confidential wellness report and resources to manage job search stress.

Check Wellbeing

Skill Coach

Plan your skill development with O*NET support to stay competitive in your field.

Start Coaching

Outfit Helper

Get AI-powered suggestions on what to wear for your next interview.

Find Outfit

Income Tax Calculator

Plan your finances with our calculator, updated for 2025 tax regulations.

Calculate Tax

Salary Benchmark

Get accurate, AI-supported salary trends to know your worth and negotiate better.

Check Salaries

Interview Practice

Practice for any interview with AI-enabled Q&A sessions. All data is private.

Start Practicing

Interview Predictor

Use our AI-supported tool to predict potential interview questions based on your resume.

Predict Questions

Interview Practice Timer

Use our mock interview trainer to perfect your answers under timed conditions.

Start Timer

Behavioral Mastery

Ace tricky behavioral interviews with our AI-powered practice module.

Master Answers

Question Journal

Confidentially record interview questions you were asked for future reference.

Open Journal

Interview Ace

A comprehensive tool to help you master every aspect of your interviews.

Become an Ace

Q&A Logs

Confidentially track your answers to common questions and refine them over time.

View Logs

Application Planner

Schedule and organize your job applications in one confidential planner.

Open Planner

Cover Letter Tool

Create perfect, tailored cover letters for each application with AI support.

Generate Letter

Resume Score

Get instant feedback on your resume with our NLP-supported analysis tool.

Check My Score

ATS Score

Check your resume's compatibility with Applicant Tracking Systems (ATS).

Check ATS Score

Application Analyzer

Use AI to analyze job descriptions and optimize your application materials.

Analyze Application

Career Visualizer

Confidentially plan and visualize your long-term career path and goals.

Visualize My Career

Offer Genius

Get intelligent insights and strategies to confidently negotiate job offers.

Negotiate Offers

JobFlow

Track your entire job search progress from application to offer with this intelligent tool.

Track My Flow

JobSense

Our intelligent matching engine that provides smart job recommendations.

Get Smart Matches

Networking Toolkit

Tools to build and manage your professional connections. All data is confidential.

Build Network

Professional CV

A classic, O*NET supported template for corporate and professional roles.

Use This Template

Executive CV

A premium, O*NET supported template designed for senior and C-level positions.

Use This Template

Modern CV

A fresh, stylish, O*NET supported template perfect for tech and modern industries.

Use This Template

Creative CV

A visually distinct, O*NET supported template for design and artistic roles.

Use This Template

Minimalist CV

A clean, simple, O*NET supported template that focuses purely on content.

Use This Template

Europass CV

The standard European Union recommended format for wide compatibility.

Use This Template

Student CV

An institution-recommended template perfect for internships and first jobs.

Use This Template

Graduate CV

An institution-recommended template for recent graduates entering the workforce.

Use This Template

Academic CV

The researcher-recommended format for roles in academia and research.

Use This Template

Developer/IT CV

A tech-savvy recommended template to highlight your technical skills.

Use This Template

Skilled Worker CV

A trades-recommended template to showcase hands-on skills and experience.

Use This Template

Monochrome CV

A sleek, black-and-white, O*NET supported template for a professional look.

Use This Template

Art CV

An artist-recommended template that allows your creativity to shine.

Use This Template

Harvard CV

A researcher-recommended template based on the classic Harvard format.

Use This Template

Volunteer Research

Help us improve our platform by joining our community research program.

Join Research

Review Us

Share your experience with our tools to help other job seekers.

Share Experience

Register

Create your free account to save jobs, build your profile, and track applications.

Create Account

Login

Access your dashboard, manage applications, and continue your job search.

Access Your Account

Profile Builder

Create a comprehensive professional profile that attracts recruiters and showcases your skills.

Build Your Profile

View Profile

See your public profile exactly as employers will see it. Make sure it's perfect.

Preview Profile

Bookmarked Jobs

Keep track of all your saved job opportunities in one organized place.

View Saved Jobs

Your Reviews

View and manage all the company reviews you've submitted.

See Your Reviews

Following

Manage the list of companies you follow to stay updated on their new openings.

Manage Following

Find Companies

Discover and research top employers in your country and industry.

Discover Employers

Standalone CV Builder

Use our O*NET supported CV builder to create a professional resume from scratch.

Build Your CV

PDF to DOC (Beta)

Convert your PDF resumes or documents into editable Word (DOC) format.

Convert PDF

DOC to PDF (Beta)

Create universally compatible PDF documents from your Word (DOC) files.

Create PDF

General FAQ

Find answers to common questions about our job site and platform.

Read FAQ

Job Seekers FAQ

Get help and find answers to questions specifically for job seekers.

Get Help

Job Matching

Learn about the technology and algorithms behind how we match you to jobs.

Learn How

Personalized Matching

Discover how we use your profile and activity to provide customized job suggestions.

Learn More

Quick Apply

Understand our fast application process and how to make the most of it.

Learn More

Alert Frequency

Learn how to manage your job alert settings so you get the updates you want.

Manage Settings

Job Alerts Guide

A complete guide to understanding how job alerts work and how to use them effectively.

Read Guide

Resume Matching

Learn how our system matches your resume to job requirements.

Learn More

Ethical Branding

Read our guide to building a professional and ethical personal brand.

Read Guide

Candidate Visibility

Learn how to increase your visibility to recruiters on our platform.

Increase Visibility

Verified Badge

Find out how you can get a verified badge to build trust with employers.

Get Verified

AI ATS Technology

Learn about the advanced AI and ATS technology that powers our platform.

Learn More

ATS Ranking

Understand how Applicant Tracking Systems rank you as an applicant.

Learn More

Semantic Matching

Learn how our AI-powered semantic matching goes beyond keywords.

Learn More

    Lead Software Engineer Python Java Jobs in London Job Search Guide, Trends and Insights