Integration and Full Stack Engineer
Confirmed on the employer's own hiring board on Oct 11, 2026. First seen by Alion on Oct 1, 2026. LSEG scores B on the Alion truth index.
LSEG are embarking on a Finance Transformation programme, delivering our Finance Vision and redefining the way we work to bring value and deliver sustainable growth for the business. The Programme shall drive efficiencies and maximise benefits for LSEG by Transforming our abilities of managing Financial Crime via our internal Engineering capabilities.
We have an exciting opportunity for a Integration and Full Stack Engineer to join our dynamic team within the London Stock Exchange Group, working as part of the Financial Crime Engineering team, and supporting LSEG through designing and developing data warehousing solutions and integration of our core systems.
The role sits within the Corporate Engineering Delivery function, which provides technology services to Corporate Functions Teams for LSEG, and we are looking for someone with demonstrated ability for our Financial Crime Engineering Team. This is a hands-on development position for a candidate with demonstrable record of working with data analysis and database development having excellent development and problem-solving skills,
someone with creativity and self-motivation to deliver on critically important projects with timelines and competing priorities and execution excellence (preferably in Financial Services) in supporting enterprise applications across various business units and has good exposure to various database engineering platforms.
As a Lead Integration & Full Stack Engineer, you will be responsible for:
- Designing and owning enterprise integrations across internal and external platforms.
- Building secure, scalable REST APIs, GraphQL APIs and integration services.
- Developing integrations using EventBridge, SQS, SNS, Step Functions and webhooks.
- Building modern full stack applications supporting business workflows.
- Developing responsive UIs using React and TypeScript.
- Building backend services using Java/Spring Boot or Node.js/NestJS.
- Designing and implementing microservices and cloud-native applications.
- Managing application deployments, releases and production support.
- Establishing integration standards, reusable patterns and best practices.
- Collaborating with business, architecture and engineering teams.
- Driving code reviews, testing, automation and engineering quality.
- Mentoring engineers and providing technical leadership.
Knowledge/Skills
- Experience with Enterprise Integration Patterns and system interoperability, Kafka is must
- Strong experience with REST APIs, GraphQL, Webhooks and API design.
- Strong understanding of OAuth2, OIDC, JWT, SAML and API security.
- Proven experience designing event-driven and message-based architectures.
- Hands-on experience with Node.js/NestJS.
- Experience building Microservices and Distributed Systems.
- Strong proficiency in React, TypeScript, JavaScript, HTML5 and CSS3.
- Experience with Material UI or similar component frameworks.
- Strong working knowledge of PostgreSQL, MySQL and DynamoDB.
- Experience with data modelling and query optimization.
- Hands-on experience with AWS services (Lambda, ECS, EKS, SQS, SNS, EventBridge, API Gateway)
- Experience with RDS, DynamoDB and S3.
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Experience
- 8+ years of software engineering experience.
- Proven experience in enterprise integration and full stack development.
- Strong experience designing and delivering API-first solutions.
- Experience building cloud-native applications on AWS.
- Experience integrating platforms such as ServiceNow, Salesforce, Workday or SAP.
- Experience delivering event-driven and microservices-based solutions.
- Experience with DevOps, CI/CD and Infrastructure as Code.
- Exposure to Financial Services, Risk, Compliance or regulated environments is preferred.
- Strong stakeholder management, ownership and leadership skills.
Career Stage:
Senior AssociateLondon Stock Exchange Group (LSEG) Information:
Join us and be part of a team that values innovation, quality, and continuous improvement. If you're ready to take your career to the next level and make a significant impact, we'd love to hear from you.
LSEG 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.
Working with us means that you will be part of a dynamic organisation of 25,000 people across 65 countries. However, we will value your individuality and enable you to bring your true self to work so you can help enrich our diverse workforce.
We are proud to be an equal opportunities employer. This means that we do not discriminate on the basis of anyone’s race, religion, colour, national origin, gender, sexual orientation, gender identity, gender expression, age, marital status, veteran status, pregnancy or disability, or any other basis protected under applicable law. Conforming with applicable law, we can reasonably accommodate applicants' and employees' religious practices and beliefs, as well as mental health or physical disability needs.
You will be part of a collaborative and creative culture where we encourage new ideas. We are committed to sustainability across our global business and we are proud to partner with our customers to help them meet their sustainability objectives. Our charity, the LSEG Foundation provides charitable grants to community groups that help people access economic opportunities and build a secure future with financial independence. Colleagues can get involved through fundraising and volunteering.
LSEG offers a range of tailored benefits and support, including healthcare, retirement planning, paid volunteering days and wellbeing initiatives.
Please take a moment to read this privacy notice carefully, as it describes what personal information London Stock Exchange Group (LSEG) (we) may hold about you, what it’s used for, and how it’s obtained, your rights and how to contact us as a data subject.
If you are submitting as a Recruitment Agency Partner, it is essential and your responsibility to ensure that candidates applying to LSEG are aware of this privacy notice.