Principal or Lead Software Engineer (Full Stack)

We are the Intelligent Internet Platform. We connect People, Places and Things anywhere, managing Internet Performance better than anyone else, while providing One Global Experience, giving Visibility, Control and Security through expereoOne.

Expereo believes in the power of Internet connectivity. As the world's largest provider of managed internet, SD-WAN/SASE, and Cloud connectivity solutions, we power enterprises and government sites worldwide, helping to enhance every business' productivity with flexible and optimal Internet performance.

As a trusted partner of Fortune 500 enterprises and carriers, our continued aim and success in helping both our customers and partners depends solely on the talented individuals that make Expereo a dynamic, effective, multicultural, and equitable environment.

About the role

As a Principal or Lead Engineer within our new Digital Office, you will play a critical role in accelerating Expereo’s transformation through the Single-Threaded Owner (STO) model. Operating within either the Commercial XP or In-Life XP STO, you will join a full-stack, outcome-driven squad focused on delivering intuitive, performant, scalable digital experiences across the Expereo customer journey.

You will design and build modern front-end and back-end applications, mentor engineers, shape engineering best practices, and contribute to a truly programmable, automated digital platform. This role is ideal for engineers who thrive in high-impact, cross-functional environments and enjoy building elegant user experiences backed by robust, scalable distributed systems.

Key Responsibilities

Full-Stack Application Development

• Lead the design and maintenance of scalable front-end applications (React, Vue, Angular) and back-end services (Node.js, Python, or similar) , creating reference implementations and documentation for the team to follow.
• Develop reusable UI components, design systems, shared libraries, and internal service frameworks.
• Build and integrate APIs (REST, GraphQL, event-driven and microservices architectures).

Performance, Quality & Reliability

• Ensure applications meet the highest standards of performance, security, accessibility, and reliability.
• Lead automated testing across unit, integration, contract, and end-to-end layers.
• Implement observability in both front-end and back-end systems, including logging, metrics, tracing, and alerting.
• Champion reliability engineering practices and performance optimization.

Automation & Platform Engineering

• Contribute to and evolve CI/CD pipelines, build tooling, infrastructure automation, and quality gates.
• Drive engineering standardization across STOs, including coding guidelines, architectural patterns, and platform abstractions.
• Lead initiatives that reduce friction, improve developer experience, and accelerate delivery cycles.

Technical Leadership & Innovation

• Partner with designers, architects, product managers, and engineers to ensure the technical direction aligns with long-term platform goals.
• Partner directly with designers and your team’s Product Manager to evaluate the technical feasibility of new capabilities and provide effort estimations.
• Foster a high-ownership engineering culture through active mentorship and by setting the bar for code quality and testing layers.
• Lead explorations of new technologies, including agentic AI enablement, data-driven UX, programmable networks, and developer tooling.
• Contribute to reference implementations, architectural blueprints, and engineering guardrails.
• Identify technical risks early in the product lifecycle and propose pragmatic solutions to mitigate them.

Requirements

Must Have

• Strong proficiency with JavaScript & TypeScript and back-end languages (.NET must, Node.js or Python preferred).
• Expertise in modern front-end frameworks (React, Vue, or Angular).
• Knowledge of component-based architecture, state-management patterns (Redux, Zustand, Vuex, etc.).
• Experience building and consuming REST, GraphQL, streaming/event-driven APIs, and microservices.
• Familiarity with modern build tools (Vite, Webpack, Babel) and CI/CD pipelines (GitHub Actions, GitLab, Azure DevOps, etc.).
• Experience with CSS frameworks (Tailwind, Bulma, MUI, Chakra).
• Strong understanding of automated testing (Jest, Cypress, Playwright).
• Solid grounding in accessibility (WCAG), security best practices, observability, and performance tuning.
• Experience with cloud environments (AWS, Azure, or GCP).
• Experience working with Salesforce.
• Experience leading technical decision-making and mentoring experienced engineers.

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Nice to Have

• Exposure to agentic AI, data-driven UI architectures, or AI-powered developer tools (Cursor, Claude Code, Copilot).
• Experience with design systems, component libraries, or Storybook.
• Familiarity with programmable networks, observability tooling, or network automation concepts.
• Understanding of advanced security practices (CSP, threat modeling, RBAC patterns, dependency scanning).
• Experience in distributed systems or event-driven architectures.

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Mindset

• You treat the product as your own and prioritize long-term stability over short-term "hacks".
• Code-first and automation-first approach to solving problems.
• You are eager to work across the full stack and stay curious about the evolving tech landscape.

Benefits

What We Offer

• A dynamic, international work environment with growth opportunities
• Exposure to cutting-edge technologies and large-scale global networks
• Learning and development support to build your career in product management
• Competitive compensation and local benefits
• Hybrid working

Beyond the Job

We’re proud of our focus on Environment, Social and Governance as well as the passion we display for the communities where we live and work.

EEO (Equal Employments Opportunities) Statement

Expereo is an Equal Opportunities employer who aims to support and celebrate every employee that comes through our doors. We respect and support all of our people regardless of background, religion, nationality, sexual orientation, age, or physical condition.