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From the employer's careers site First seen 26 Oct 2026

Lead Software Engineer – Reflex Platform Developer (Network Automation)

The employer hasn't listed a salary.

Apply on London Stock Exchange Group (LSEG)

Description

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.

Responsibilities

  • Platform Engineering:
  • Design and develop microservices-based backend systems for Reflex
  • Build and maintain intent-based APIs and orchestration logic
  • Implement event-driven workflows for network service automation
  • Develop abstract service models (VPC connectivity, VLANs, routing, etc.)
  • Integration & Automation:
  • Integrate northbound with: UI layer ServiceNow / business APIs
  • Integrate southbound with: Network services (DNS, IPAM, firewalls, LB) Cloud networking constructs
  • Deliver Infrastructure-as-Code (IaC) and CI/CD pipelines
  • Frontend & User Experience:
  • Develop/refine UI applications (Vue.js / Quasar)
  • Enable self-service workflows for Cloud Ops users
  • Architecture & Design:
  • Define high-level system design and architecture
  • Ensure scalability for global multi-tenant environments
  • Apply distributed system best practices
  • Leadership:
  • Mentor junior engineers
  • Drive engineering standards and design patterns
  • Work closely with Product Owners and Architects

Requirements

  • Backend (Mandatory):
  • Java (strong expertise)
  • Spring Boot
  • Hibernate
  • Gradle
  • REST API design (extensible, versioned APIs)
  • Frontend (Mandatory / Flexible):
  • JavaScript / TypeScript
  • Modern frameworks: Vue.js + Quasar (preferred) OR React / Angular (with willingness to learn Vue)
  • Cloud & Architecture:
  • Microservices architecture
  • Event-driven systems (Kafka, messaging patterns)
  • Distributed systems debugging
  • Cloud platforms (AWS, Azure, GCP)
  • Database:
  • PostgreSQL
  • Strong SQL expertise
  • Data modelling for distributed systems
  • DevOps & Automation:
  • Git (version control)
  • CI/CD pipelines
  • Infrastructure as Code (Terraform preferred)
  • Agile / Scrum methodologies

Nice to Have

  • Kotlin
  • Event streaming (Kafka)
  • Experience with ServiceNow integration
  • Experience in telecoms or financial infrastructure environments

Skills

Required

Nice to have

  • Kotlin
  • Event streaming
  • ServiceNow integration
  • Telecoms
  • Financial infrastructure
Apply on London Stock Exchange Group (LSEG)