Senior Full Stack Developer

Role Overview: We are looking for a strong, hands-on, versatile, and highly autonomous Senior Full Stack Engineer to design, build, and operate our enterprise People Function Capability Layer. Working within a lean, high-impact team alongside Data Engineers, you will play a dual role: extending backend integration services and enabling data visibility and interaction for business stakeholders. You will be responsible for designing, implementing APIs and building low-code, persona-centric user interfaces (e.g., using Retool) to surface insights and workflows. You will play a key role in ensuring operational excellence, data security, and business continuity in a cloud-native environment. We are seeking someone with strong experience in full-stack development and enterprise application engineering, with a focus on Golang/Python, AWS, JavaScript/TypeScript, Retool, HTML5, and CSS. The candidate will contribute across design, development, deployment, and lifecycle management of applications and services. Key responsibilities: Design, develop, and secure low-latency, scalable RESTful APIs using Golang. Actively contribute to backend service development, supporting event-driven microservices and integration patterns in collaboration with Data Engineers. Develop optimized queries, aggregation logic, and transformation layers to integrate data across relational and NoSQL systems. Design, build, and maintain high-value internal applications tailored to different user personas and workflow needs. Define and enforce technical standards, design patterns, and best practices across development, security, and application architecture. Build and manage CI/CD pipelines to enable efficient and reliable software delivery. Drive observability practices using tools such as Datadog and Grafana to monitor application and infrastructure health. Collaborate with distributed teams and cross-functional stakeholders to translate requirements into scalable, user-centric solutions delivered on time. Design and manage AWS infrastructure to support highly available, low-latency application workloads.

Must Have Skills: Strong hands-on experience with Golang/Python for backend development and JavaScript/TypeScript for frontend development, with solid proficiency in HTML5 and CSS for building responsive, user-centric interfaces. Strong experience in API lifecycle management, including schema design, versioning, throttling and payload optimization. Proficiency in Angular for building responsive, scalable front-end applications as part of a full stack development environment. Deep understanding of SOLID principles, dependency injection, and robust error handling patterns. Strong hands-on experience with AWS services – AWS Lambda, SQS, SNS, EC2, S3, RDS, API Gateway, VPC, EKS, ECS, IAM, CloudWatch and cloud-native application design. Strong experience with relational databases (e.g., PostgreSQL, MS SQL) and NoSQL databases (e.g., DynamoDB). Strong hands-on experience with event-driven architectures and message brokers (e.g., Kafka, RabbitMQ). Hands-on experience building distributed systems on AWS and containerization using Docker. Hands-on experience with CI/CD tools (e.g., Jenkins, GitLab CI). Experience with observability platforms such as Datadog, Prometheus, or equivalent. Strong understanding of cloud security best practices including IAM, encryption, vulnerability management, and compliance controls.

Qualifications:  Bachelor’s degree in Computer Science, Engineering, or related field, or equivalent practical experience. 5+ years of full-stack or software engineering experience, with at least 3+ years in full stack development. 3+ years of hands-on experience building full-stack applications, including backend development (Golang/Python, APIs, microservices) and frontend development using JavaScript/TypeScript frameworks, with strong experience integrating UI layers (e.g., Retool or similar low-code platforms) with distributed, event-driven systems on AWS and Kafka. Nice to have: (Review Certifications) AWS certifications such as AWS Certified Solutions Architect – Associate, AWS Certified Developer, or equivalent.

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Career Stage: Senior Associate London 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.

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