Experience in telecoms or financial infrastructure environments
Full description
Lead Software Engineer – Reflex Platform Developer (Network Automation)
Role Summary
We are looking for a Lead Reflex Developer to build and evolve a strategic automation platform delivering intent-based, fully automated multi-cloud connectivity services across global network infrastructure.
The Reflex platform acts as the top-layer orchestration and abstraction system, enabling business users to request connectivity services via APIs and UI, while automatically translating requirements into network provisioning workflows involving DNS, IPAM, firewalls, load balancers, and cloud connectivity.
You will play a leading engineering role in designing and implementing scalable, cloud-native microservices that automate end-to-end lifecycle management of network services across AWS, Azure and on-premise environments.
About Reflex
Reflex is LSEG’s automation platform for private multicloud connectivity, reducing provisioning timelines from weeks to minutes.
Key characteristics:
Intent-driven API model (business-friendly abstraction)
Ability to translate business intent → technical implementation
Experience with large-scale, high-availability systems
Excellent communication and collaboration
Attention to detail and quality-driven mindset
What Makes This Role Unique
Work on a mission-critical automation platform used globally
Build systems that eliminate manual network provisioning
Operate at the intersection of: Software engineering Cloud Network automation
Influence architecture for future scalable connectivity platforms
Nice to Have
Kotlin
Event streaming (Kafka)
Experience with ServiceNow integration
Experience in telecoms or financial infrastructure environments
Example Candidate Profile
8+ years in software engineering
Strong backend engineer with exposure to cloud + networking
Experience building automation platforms or orchestration systems
Comfortable leading design and mentoring teams
Career Stage:
Manager
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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