Lead Software Engineer (Full Stack)

Expereo International; Katowice; On-site; PLN 260,000 - 420,000; Full time

Job summary

Expereo, the Intelligent Internet Platform, is seeking a Lead Engineer for its Digital Office in Katowice. You will design, build, and mentor across full-stack applications that power the Expereo customer journey.

You will shape engineering practices and scale a programmable, automated digital platform in a cross-functional squad. You’ll work on modern front-end and back-end systems, drive CI/CD, and improve performance, security, and observability while collaborating with product, design, and

Qualifications

• Proficiency in JavaScript/TypeScript and back-end languages (.NET, Node.js or Python).
• Expertise with React, Vue, or Angular front-ends.
• Experience with REST, GraphQL, microservices and event-driven APIs.
• Familiarity with build tools (Vite, Webpack) and CI/CD (GitHub Actions, GitLab, Azure DevOps).
• CSS frameworks (Tailwind, Bulma, MUI, Chakra) and testing (Jest, Cypress, Playwright).
• Security, accessibility, observability, and performance tuning.
• Cloud providers (AWS, Azure, GCP) and Salesforce experience.
• Mentoring engineers and leading technical decisions.

Responsibilities

• Lead the design and maintenance of scalable front-end applications (React, Vue, Angular) and back-end services (Node.js, Python).
• Develop reusable UI components, design systems, shared libraries, and internal service frameworks.
• Build and integrate APIs (REST, GraphQL, microservices).
• Lead automated testing across unit, integration, contract, and end-to-end layers.
• Implement observability in front-end and back-end systems with logging, metrics, tracing, and alerts.
• Champion reliability engineering practices and performance optimization.

Skills

JavaScript/TypeScript

.NET

Node.js

Python

React/Vue/Angular

REST/GraphQL

Microservices

CI/CD

Accessibility

Security

Cloud (AWS/Azure/GCP)

Salesforce

Mentoring

Testing (Jest/Cypress/Playwright)

Observability

Design Systems

Tools

Vite

Webpack

Babel

GitHub Actions

GitLab

Azure DevOps

Storybook

Terraform

Job description

We are theIntelligent Internet Platform.We connectPeople, PlacesandThingsanywhere,managing Internet Performancebetter than anyone else, while providingOne Global Experience,givingVisibility, ControlandSecuritythroughexpereoOne.

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 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.

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.

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.

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.

What We Offer

• A dynamic, international work environment with growth opportunities

• Exposure tocutting-edgetechnologies 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 onEnvironment, Social and Governanceas 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.