40 senior python developer jobs found in London

End Date Thursday 01 January 2026 Salary Range £72,702 - £109,053 We support flexible working – click here for more information on flexible working options Flexible Working Options Hybrid Working, Job Share Job Description Summary . Job Description JOB TITLE: Software Engineer SALARY: £70,929 – £78,810 LOCATION(S): Bristol HOURS:  Full-time – 35 hours per week WORKING PATTERN:  Our work style is hybrid, which involves spending at least two days per week, or 40% of our time, at our Bristol office. About this opportunity At Lloyds Banking Group we're building a bank for the future, and we need your help. Lloyds Banking Group is the UK’s leading digital franchise, with over 13 million active online customers across our three main brands; Lloyds Bank, Halifax and Bank of Scotland. Our technology, our culture, and our mind-set is changing to craft a truly engineering-led organisation. In Analytics & AI, our mission is to automate...

Role Profile Are you passionate about making developers' lives easier, faster, and more fulfilling? Do you dream of streamlining workflows, squashing bugs, and fuelling innovation? We're on a mission to supercharge our engineering culture by building a world-class Developer community that's the envy of the industry. In this role, you'll be joining our Engineering Team within Engineering Excellence & Productivity (EXP) as a Technical Lead. Developer Platforms’ mission is to: Enable rapid developer onboarding to LSEG developer tools, ensuring they become productive quickly to build applications on their chosen Cloud platform Improve Developer Experience by increasing their ability to improve cadence of delivery of new features Unlock Developer Capacity and enable greater Innovation by modernising tooling and processes Ensure that development on the integrated platform is both secure and compliant by design Tech Profile/Essential Skills Good knowledge of...

Senior Data Engineer, SwapClear  JOB DESCRIPTION ABOUT US: LSEG (London Stock Exchange Group) is more than a diversified global financial markets infrastructure and data business. We are dedicated, open-access partners with a dedication to excellence in delivering the services our customers expect from us. With extensive experience, deep knowledge and worldwide presence across financial markets, we enable businesses and economies around the world to fund innovation, manage risk and create jobs. It’s how we’ve contributed to supporting the financial stability and growth of communities and economies globally for more than 300 years. Through a comprehensive suite of trusted financial market infrastructure services – and our open-access model – we provide the flexibility, stability and trust that enable our customers to pursue their ambitions with confidence and clarity. LSEG is headquartered in the United Kingdom, with significant operations in 65 countries across...

Who We Are At OKX, we believe that the future will be reshaped by crypto, and ultimately contribute to every individual's freedom. OKX is a leading crypto exchange, and the developer of OKX Wallet, giving millions access to crypto trading and decentralized crypto applications (dApps). OKX is also a trusted brand by hundreds of large institutions seeking access to crypto markets. We are safe and reliable, backed by our Proof of Reserves.   Across our multiple offices globally, we are united by our core principles: We Before Me , Do the Right Thing , and Get Things Done . These shared values drive our culture, shape our processes, and foster a friendly, rewarding, and diverse environment for every OK-er.   OKX is part of OKG, a group that brings the value of Blockchain to users around the world, through our leading products OKX, OKX Wallet, OKLink and more.   What You’ll Be Doing  As a Senior Data Analyst in the Strategic Markets...

Job Title Senior Engineer: Java Job Description So, who are we? Hello, we're IG Group. We are an FTSE250 FinTech company who run mobile, web and desktop platforms that help our clients trade stocks & shares, leveraged products, Futures & Options and Crypto. We are ambitious. Over 340,000 people already use our platforms. We're global with offices in 18 countries and products in 16 regions. We're hungry to move faster, ship better product for our customers and grow our user base. We believe in high autonomy, and we want people who are looking to do things differently in order to create better experiences for our customers. We work in cross-functional teams and are laser focused on increasing the number of active clients we serve to drive sustainable growth. Your team This role is part of our Digital Platform Services team, who are responsible for delivering central services to the divisions in an API first way by utilising AI to pioneer of AI-first...

End Date Friday 09 January 2026 Salary Range £0 - £0 We support flexible working – click here for more information on flexible working options Flexible Working Options Hybrid Working, Job Share Job Description Summary Assist the Engagement Lead in the delivery of Audits or lead evaluation of controls and completion of testing applying proficient knowledge of audit methodology and assigned business / risk area. Job Description JOB TITLE:   Audit Analyst   (Assistant Vice President ) - Markets   SALARY: £48,000 - £73,000 (dependant on location) LOCATION(S):   London,   Edinburgh & Bristol   HOURS:   Full-time   WORKING PATTERN:   Our work style is hybrid, which involves spending at least two days per week, or 40% of our time, at one of our   hub locations.   About this opportunity   The Markets business with Lloyds Banking Group is growing and we are looking for...

End Date Saturday 03 January 2026 Salary Range £81,999 - £91,110 We support flexible working – click here for more information on flexible working options Flexible Working Options Flexibility in when hours are worked, Hybrid Working, Job Share, Reduced Hours Job Description Summary Helps identify, assess, visualise and remediate known gaps in the Groups Data Resilience position. Supports the annual Data Resilience Assessments alongside key stakeholders and provides support for centrally funded initiatives. Job Description JOB TITLE: Data Resilience Technology Specialist SALARY: London: £81,999 - £91,110 All other areas: £78,810 £70,929 LOCATION: London, Manchester, Edinburgh or Birmingham HOURS:  Full time WORKING PATTERN: Hybrid, 40% (or two days) in the London office About this opportunity The Data Resilience team is a new chapter within the Chief Data and Analytics Office (CDAO). It has the responsibility to define and...

The Role: ION Markets Information Security Team is looking to hire a Platform Security Engineer that support the division’s security strategy through definition and implementation of security controls across our platforms, infrastructure, and operational workflows. As the Platform Security Engineer, you will be responsible for designing and implementing end-to-end security controls across ION Markets on-premises infrastructure and other internal platforms. The role spans security architecture, engineering, and operations with a strong focus on automation, detection and secure by design principles. Additionally, as part of the role you will be participating in threat detection, incident response and vulnerability management remediation. You will be serving as an operational responder, working closely with Product, infrastructure and Security Operations teams. We are looking for a hard-working, dedicated and motivated individual. Excellent communication...

Job Description (Job advert content) ABOUT US: LSEG (London Stock Exchange Group) is more than a diversified global financial markets infrastructure and data business. We are dedicated, open-access partners with a dedication to excellence in delivering the services our customers expect from us. With extensive experience, deep knowledge and worldwide presence across financial markets, we enable businesses and economies around the world to fund innovation, manage risk and create jobs. It’s how we’ve contributed to supporting the financial stability and growth of communities and economies globally for more than 300 years. Through a comprehensive suite of trusted financial market infrastructure services – and our open-access model – we provide the flexibility, stability and trust that enable our customers to pursue their ambitions with confidence and clarity. LSEG is headquartered in the United Kingdom, with significant operations in 70 countries across EMEA, North...

Lead, Software & Platform Engineering ABOUT US: LSEG (London Stock Exchange Group) is more than a diversified global financial markets infrastructure and data business. We are dedicated, open-access partners with a dedication to excellence in delivering the services our customers expect from us. With extensive experience, deep knowledge and worldwide presence across financial markets, we enable businesses and economies around the world to fund innovation, manage risk and create jobs. It’s how we’ve contributed to supporting the financial stability and growth of communities and economies globally for more than 300 years. Through a comprehensive suite of trusted financial market infrastructure services – and our open-access model – we provide the flexibility, stability and trust that enable our customers to pursue their ambitions with confidence and clarity. LSEG is headquartered in the United Kingdom, with significant operations in 65 countries across EMEA, North America,...

ABOUT US: LSEG (London Stock Exchange Group) is more than a diversified global financial markets infrastructure and data business. We are dedicated, open-access partners with a dedication to excellence in delivering the services our customers expect from us. With extensive experience, deep knowledge and worldwide presence across financial markets, we enable businesses and economies around the world to fund innovation, manage risk and create jobs. It’s how we’ve contributed to supporting the financial stability and growth of communities and economies globally for more than 300 years. Through a comprehensive suite of trusted financial market infrastructure services – and our open-access model – we provide the flexibility, stability and trust that enable our customers to pursue their ambitions with confidence and clarity. LSEG is headquartered in the United Kingdom, with significant operations in 65 countries across EMEA, North America, Latin America and Asia Pacific. We employ...

About the Role: Grade Level (for internal use): 11 Job Overview: This role combines in-depth analytical capabilities with product management expertise. You will apply your knowledge to improve processes and workflows, integrate industry expertise, and evaluate complex issues that can significantly impact product success. You will also lead initiatives to enhance product offerings, ensuring alignment with business objectives and customer needs. Responsibilities and Impact 5-8 years of experience collaborating with stakeholders to gather complex data requirements that will support DaaS products. You will play a pivotal role in solving complex data challenges by ensuring our data processes, documentation, and tooling follow MDLC (Machine Learning Development Lifecycle) best practices. Work with other business analysts, data engineers, data scientists, product and data production teams to capture requirements and deliver complex data solutions using ML, predictive...

Job Description: Dow Jones is a global provider of news and business information, delivering content to consumers and organizations around the world across multiple formats, including print, digital, mobile and live events. Dow Jones has produced unrivaled quality content for more than 130 years and today has one of the world’s largest news-gathering operations globally. It is home to leading publications and products including the flagship Wall Street Journal, America’s largest newspaper by paid circulation; Barron’s, MarketWatch, Mansion Global, Financial News, Investor’s Business Daily, Factiva, Dow Jones Risk & Compliance, Dow Jones Newswires, OPIS and Chemical Market Analytics. Dow Jones is a division of News Corp (Nasdaq: NWS, NWSA; ASX: NWS, NWSLV). About the Team: Chemical Market Analytics by OPIS, a Dow Jones company, enables stakeholders in the global chemical industry to improve operational efficiency with deep insights, future outlooks,...

Job Title Quant/Model Developer: Risk Job Description So, who are we? Hello, we're IG Group. We are an FTSE250 FinTech that run mobile, web and desktop platforms that help our clients trade stocks & shares, leveraged products, Futures & Options and Crypto. We are ambitious. Over 340,000 people already use our platforms. We're global with offices in 18 countries and products in 16 regions. We're hungry to move faster, ship better product for our customers and grow our user base. We believe in high autonomy, and we want people who are looking to do things differently in order to create better experiences for our customers. We work in cross-functional teams and are laser-focused on increasing the number of active clients we serve to drive sustainable growth. Your team The Quant Risk Team and Financial Risk Team is responsible for the end-to-end management of IG Group’s credit, market, capital and liquidity risk profiles . The Team designs, develops...

Role profile: Group Risk IT provides technology solutions for Group Risk, a centralised function which oversees all Clearing Services in LCH.  It is composed of 3 sub teams - development, QA & Business Analysis. Our primary objective is to inspire confidence in market participants through providing efficient and effective clearing services and risk management. The ideal candidate will be diligent, tenacious and delivery focused with a track record of building high quality solutions that are resilient and maintainable. Group Risk IT is responsible several risk management applications, the primary one being a data warehouse and reporting solution used by Group Risk. In addition to the data warehouse, there are microservices that expose the data in a user interface and perform calculations. The risk management application is used to analyse and report risk exposures, compute capital requirements (KCCP), manage Internal Credit Scores (ICS), and monitor risk against policies....

Reporting to the Head Behavioural Scientist in NTS' Research and Innovation team, you’ll play a meaningful role conducting a wide range of duties, including industry and academic literature reviews, analyses of prosecuted cases, interviews and focus groups, as well as quantitative analysis of market data and other datasets. The overarching goal is to provide actionable insights that guide the development and implementation of AI - driven product improvements. Key Responsibilities Undertake in-depth qualitative and quantitative research to thoroughly understand customer problems and requirements. Apply behavioural science methods to elicit and document expert knowledge and decision-making from practitioners. Support product delivery leads and developers in translating research concepts into product features. Communicate research findings to executive decision-makers and non-technical audiences. Compose and facilitate focus groups and workshops with customers and...

LSEG and Microsoft have entered an exciting strategic partnership for the development of next-generation data, analytics and cloud infrastructure solutions. Our customers’ needs are evolving and so are financial markets. This partnership will transform the way customers discover, analyse and trade securities around the world. It will also advance our cloud strategy and build the improved resilience, efficiency and agility that our customers need. All of Microsoft’s customers will also have access to our data and analytics capabilities through a single flexible infrastructure that is intuitive and responsive. If you are interested in being a part of this dynamic strategic partnership, we look forward to considering your skills and experience. ROLE PROFILE: The Tech Lead, Quantitative Analytics Engineering role will manage a group of quantitative analytics application developers and consulting partnerships to design, build and deliver Analytics product solutions for a global...

About us: LSEG (London Stock Exchange Group) is a leading global financial markets infrastructure and data provider. Our purpose is driving financial stability, empowering economies and enabling customers to create sustainable growth. Our purpose is the foundation on which our culture is built. Our values of Integrity, Partnership, Excellence and Change underpin our purpose and set the standard for everything we do, every day. They go to the heart of who we are and guide our decision making and everyday actions. We are dedicated, open-access partners with a dedication to excellence in delivering the services our customers expect from us. With extensive experience, deep knowledge and worldwide presence across financial markets, we enable businesses and economies around the world to fund innovation, manage risk and create jobs. It’s how we’ve contributed to supporting the financial stability and growth of communities and economies globally for more than 300 years. Through a...

FTSE Russell is a leading global provider of financial services, specializing in the creation and management of indexes, data, and analytic solutions. A subsidiary of the London Stock Exchange Group (LSEG), FTSE Russell supports investors worldwide in making informed decisions across asset classes, investment strategies, and market segments. Its products are trusted by institutional and retail investors, asset managers, and pension funds to benchmark performance, build investment portfolios, and manage risk. With a reputation for innovation, transparency, and robust governance, FTSE Russell plays a critical role in shaping global financial markets. Job Summary: FTSE Russell is seeking a hands-on dynamic software development leader to drive a team of software engineers building robust equity index capabilities and indexes. The candidate demonstrates an understanding of the index construction process or a significant market data knowledge, combined with a solid, global,...

ABOUT US: LSEG (London Stock Exchange Group) is more than a diversified global financial markets infrastructure and data business. We are dedicated, open-access partners with a commitment to excellence in delivering the services our customers expect from us. With extensive experience, deep knowledge, and worldwide presence across financial markets, we enable businesses and economies around the world to fund innovation, manage risk and create jobs. It’s how we’ve contributed to supporting the financial stability and growth of communities and economies globally for more than 300 years.  Through a comprehensive suite of trusted financial market infrastructure services – and our open-access model – we provide the flexibility, stability and trust that enable our customers to pursue their ambitions with confidence and clarity. LSEG is headquartered in the United Kingdom, with significant operations in 70 countries across EMEA, North America, Latin America and Asia Pacific. We employ...

FTSE Russell | LSEG Technology FTSE Russell is a leading global provider of financial services, specializing in the creation and management of indexes, data, and analytic solutions. A subsidiary of the London Stock Exchange Group (LSEG), FTSE Russell supports investors worldwide in making informed decisions across asset classes, investment strategies, and market segments. Its products are trusted by institutional and retail investors, asset managers, and pension funds to benchmark performance, build investment portfolios, and manage risk. With a reputation for innovation, transparency, and robust governance, FTSE Russell plays a critical role in shaping global financial markets. Job Summary: FTSE Russell is seeking a junior software engineer to be part a dynamic team building the distribution capabilities of our index products to the financial community worldwide. The distribution platform encompasses the set of systems that deliver our indexes to clients who subscribe to...

Looking to hire an Automation Test Engineer, the role spans the automation of low-level business functional tests through to mid-level system integration tests. The successful candidate will have to co-ordinate with Operations Change Business Analysis team, Development teams, and Project managers, as well as testing teams. The successful candidate will have an excellent QA background with experience of a variety of automation test tools, technologies and have business domain expertise and experience of delivery in complex fast moving environments. Excellent communication skills will be vital in this role. The role will report to the Test Manager and work day to day with the Test Lead. Required Skills and Experience Extensive automation testing experience in Investment Banking IT, preparing and executing automated tests on a Financial platforms. Extensive experience of creating automated tests for various layers of applications Working knowledge of investment banking products...

End Date Sunday 21 December 2025 Salary Range £63,711 - £70,790 We support flexible working – click here for more information on flexible working options Flexible Working Options Hybrid Working, Job Share Job Description Summary JOB TITLE: Assistant Manager, Model Validation Quant SALARY: £63,711 - £70,790 LOCATION: London HOURS: Full-time WORKING PATTERN: Our work style is hybrid, which involves spending at least two days per week, or 40% of our time, at one of our office sites. Job Description About this Opportunity An excellent opportunity has arisen for a highly motivated applicant to join the Model Risk Office at Lloyds Banking Group. This is an exciting opportunity to be part of a dynamic team in a changing and challenging environment, which offers considerable scope for personal development. Become part of the Markets & AI Modelling team which covers pricing models, counterparty risk models, and AI technology. Our team provides...

End Date Sunday 04 January 2026 Salary Range £76,464 - £84,960 We support flexible working – click here for more information on flexible working options Flexible Working Options Hybrid Working, Job Share Job Description Summary The Control Assurance team plays a critical role in safeguarding CIB by independently assessing the design and operating effectiveness of its non-financial controls. This role ensures that key controls mitigate risks across all risk types, supporting CIB’s strategic ambitions and regulatory commitments. Job Description BUSINESS UNIT:  Corporate & Institutional Banking (CIB) – Chief Controls Office LOCATION:  London, Birmingham and Edinburgh HOURS:  Full Time – 35 hours per week WORKING PATTERN: Our work style is hybrid, which involves spending at least two days per week, or 40% of our time, at one of our office sites shown above. We’re looking for a motivated and meticulous   Control Assurance...