Senior Full Stack Application Develoer
at London Stock Exchange
Posted a day ago
No clicks
- Compensation
- Not specified EUR
- City
- Dublin
- Country
- Ireland
Currency: € (EUR)
Role involves designing, developing, and maintaining enterprise-grade web applications across the full stack. You will build rich front-end UIs with React and TypeScript/JavaScript, and design secure backend services in Java (Spring Boot) with PostgreSQL databases. You will implement OAuth2/OpenID Connect with Keycloak for authentication/authorization, participate in code reviews, and collaborate with product, UX, QA, and DevOps teams to deliver end-to-end solutions. The role emphasizes performance, reliability, and continuous improvement in an agile environment.
We are seeking a highly skilled Full Stack Web Developer with strong experience across modern front‑end frameworks, robust Java backend development, database design, and secure authentication/authorization frameworks. You will play a key role in designing, developing, and maintaining enterprise-grade applications that support our core business operations.
Key Responsibilities
- Design, build, and maintain scalable, high‑performance web applications.
- Develop rich, responsive front‑end UIs using React, following best practices in component architecture, state management, and performance optimisation.
- Implement and maintain secure, reliable backend services using Java (Spring Boot preferred).
- Design and optimise relational database schemas in PostgreSQL, including queries, indexing, and data migration.
- Integrate and manage user authentication and authorisation using OAuth2 / OpenID Connect with Keycloak.
- Collaborate with product owners, UX designers, QA engineers, and DevOps teams to deliver end‑to‑end solutions.
- Participate in code reviews, architecture discussions, and continuous improvement initiatives.
- Write clean, maintainable, and testable code across the full stack.
- Monitor application performance, troubleshoot issues, and ensure system robustness and stability.
Required Skills & Experience
Front‑end development:
- Strong proficiency in React, TypeScript/JavaScript, HTML5, CSS3, Webpack, and REST API consumption.
- Familiarity with UI component libraries ( is a plus.
Backend development:
- Solid experience with Java (Java 11+), including Spring Boot, JPA/Hibernate, and RESTful service design.
- Experience developing microservices is advantageous.
Database:
- Proficiency with PostgreSQL, including schema design, stored procedures, query tuning, and data modelling.
Security & Identity:
- Hands‑on experience with OAuth2 / OpenID Connect, specifically Keycloak (realm configuration, client setup, roles, user federation, etc.).
DevOps & Tooling (nice to have):
- Experience with Git, CI/CD pipelines, Docker, Kubernetes, or cloud platforms (specifically AWS).
Qualifications
- Bachelor’s degree in Computer Science, Engineering, or equivalent experience.
- 3+ years of hands‑on full‑stack development experience.
Soft Skills
- Strong problem‑solving and analytical mindset.
- Ability to communicate technical concepts clearly to technical and non‑technical stakeholders.
- Collaborative working style with a focus on quality and continuous improvement.
- Self‑motivated, adaptable, and comfortable working in agile environments.
Career Stage:
ManagerLondon 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.
Location: IRL-Dublin-12-13 Exchange Plce
Time Type: Full time
