Lead Cisco NSO Developer (Python / MAAPI / Service Provider Networks)

Job Profile Summary

As a Lead Individual Contributor (IC), this role is responsible for solving complex technical problems and guiding teams through code, architecture, and design decisions within the Network Automation domain.

You will:

• Define and own technical direction for Cisco NSO-based automation
• Lead architecture and implementation of scalable, reusable solutions
• Raise engineering standards through hands-on leadership, mentorship, and reuse
• Deliver high-quality automation solutions that accelerate delivery and reduce duplication across the REFLEX platform

Role Purpose

We are seeking a Lead Cisco NSO Developer / Architect with deep expertise in:

• Cisco NSO (6.x)
• Python development
• MAAPI-driven service implementation (critical requirement)

This role sits within the Network Automation team and drives the evolution of REFLEX, an intent-based automation platform enabling fully automated, multi-cloud network connectivity provisioning across global infrastructure.

Key Responsibilities

Technical Leadership & Ownership

• Own the technical direction and architecture of NSO-based automation systems
• Lead design and delivery of template-less services using MAAPI
• Establish best practices for scalable, reusable service models
• Mentor engineers and guide design decisions across teams

Cisco NSO & Automation Development

• Develop production-grade services using: Python (maapi, requests, netaddr) YANG models
• Implement: Stacked and composite services Full service lifecycle (CRUD ownership model) Transaction-safe, idempotent workflows
• Integrate NSO with broader ecosystem via: RESTCONF / APIs Mid-tier orchestration (MIND layer)

REFLEX Platform Contribution

Work across layers of the automation stack:

• REFLEX (UI/API layer)
  User-facing APIs, ServiceNow integration, orchestration entry point
• MIND (Logic layer)
  Intent validation, capacity management (VLANs, ASNs), workflow orchestration
• NSO (Execution layer)
  Enforces intended state across devices using service-driven configuration

Network & Service Modeling

• Translate business intent into network configurations, including: BGP/MPLS L3VPN / EVPN VRFs, VLANs, interface provisioning
• Automate multi-cloud connectivity across: AWS, Azure, GCP Data centers and colocation facilities

Software Engineering Practices

• Drive high-quality engineering standards: Unit testing (pytest) Integration testing (Robot Framework)
• Contribute to: CI/CD pipelines (GitLab) Containerized deployments (Docker)
• Promote: Code reuse Observability Secure, scalable design

Competencies (Aligned to Lead IC Expectations)

Technical Excellence

• Hands-on expert in Cisco NSO, MAAPI, and Python
• Drives improvements in: Scalability Resilience Observability
• Guides team-level architecture decisions using domain expertise

Customer Focus

• Designs systems aligned with real-world usage and operational needs
• Takes ownership of issues impacting service delivery
• Uses feedback and operational data to continuously improve automation

Risk Management

• Builds secure, resilient automation systems
• Evaluates trade-offs in: Architecture Network design Service modeling
• Ensures safe and reliable service deployment at scale

Leadership

• Leads through hands-on engineering and technical influence
• Mentors team members and raises engineering capability
• Drives consistency, quality, and reuse across solutions

Analytical Thinking

• Uses data-driven approaches to validate design assumptions
• Improves systems through: Measurement Experimentation Iteration

Adaptability

• Challenges legacy approaches and introduces improved methods
• Drives continuous improvement across platforms and practices
• Invests in personal and team-level technical growth

Communication

• Clearly articulates: Architecture decisions Design trade-offs Technical strategy
• Bridges communication between technical and non-technical stakeholders

Required Skills & Experience

Core Technical Skills

• Cisco NSO (Expert) Strong MAAPI experience (mandatory) Template-less service design YANG modelling
• Python (advanced) Automation frameworks Testing (pytest, Robot)

Networking Expertise

• Service Provider Networking: BGP/MPLS, EVPN
• Platforms: Cisco IOS-XR (ASR9K, NCS) Cisco NX-OS (Nexus 9K) Arista EOS

Automation & Tools

• REST APIs / RESTCONF
• GitLab CI/CD
• Linux
• Docker

Cloud & Infrastructure

• AWS (EC2, S3, networking fundamentals)
• Multi-cloud networking concepts

What You’ll Deliver

• Fully automated intent-based network services
• Scalable multi-cloud connectivity automation
• Reduced provisioning time from weeks to minutes
• Production-grade network automation used across global infrastructure

Summary

This is a senior leadership role for a highly technical NSO expert who:

• Specialises in MAAPI-based service development
• Understands service provider-grade networks at scale
• Can architect and deliver end-to-end automation platforms
• Drives engineering excellence through hands-on leadership

Career Stage:

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.

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