Principal Engineer

Join us at Orange Business!

We are a network and digital integrator that understands the entire value chain of the digital world, freeing our customers to focus on the strategic initiatives that shape their business.

Every day, you will collaborate with a team dedicated to providing consistent, sustainable global solutions, no matter where our customers operate. With over 30,000 employees across Asia, the Americas, Africa, and Europe, we offer a dynamic environment to develop and perfect your skills in a field filled with exciting challenges and opportunities.

We are in search of a visionary Principal Engineer who will architect, engineer, and scale next-generation cloud-native, API-first, microservices-driven platforms infused with advanced AI/ML intelligence. This role it demands a hands-on ‘builder’ with min 10+ years of proven expertise across the full stack, someone who has consistently delivered high-performance, hyper-scalable, resilient, and secure systems from the ground up. You will lead the transformation of legacy ecosystems into modern digital powerhouses, co-create breakthrough capabilities, and seamlessly embed state-of-the-art machine learning models into production-grade solutions. The ideal candidate thrives at the intersection of complex distributed systems, cutting-edge frameworks, and enterprise-grade architectures, bringing both technical depth and creative innovation to deliver world-class digital experiences. In our fast-paced, Agile-first environment, you won’t just build software—you’ll define the future of intelligent platforms.

Why This Role Matters: This is far more than just an engineering position—it is a strategic transformation charter for CPQ Transformation. As the driving force behind innovation, you will reimagine and engineer the future of Telco O/BSS Quote 2 Order Journey, designing solutions that revolutionize how products are conceived, configured, quoted, and sold. Your ability to fuse technical mastery with visionary problem-solving will enable the creation of modern, intelligent, and elegantly simple platforms that set new benchmarks in performance and usability. Every line of code and architectural decision you make will directly accelerate revenue growth, elevate customer satisfaction, and carve out sustainable competitive advantage. This is your opportunity to not just build systems, but to reshape an industry.
 

Technical Expertise:
Full-Stack Engineering with .NET Core  
Proven hands-on expertise in .NET 8+, C# 12, ASP.NET Core MVC, Web API, Entity Framework Core, LINQ, gRPC, SignalR, and Blazor/React/Angular for building intelligent, scalable platforms. Skilled in architecting micro front-end (Micro UI) solutions integrated with .NET Core backends to deliver modular, extensible, and high-performance applications.
Cutting-Edge AI/ML & LLM Integration  
Proficient in orchestrating autonomous agent frameworks (LangChain, AutoGen, CrewAI) within .NET ecosystems, designing MCP based extensibility, and optimizing prompts and pipelines using DSPy. Strong grounding in MLOps practices (MLflow, Kubeflow, Weights & Biases) to ensure reliable model lifecycle management, observability, and production grade deployment across hybrid cloud environments.
Cloud-Native & Hybrid Architecture  
Skilled in architecting API-first, microservices ecosystems across AWS, Azure, and GCP, with expertise in hybrid cloud deployments and distributed, event-driven systems. Proficient in RESTful APIs, GraphQL, Kafka, Azure Event Hub, and containerized deployments (Docker, Kubernetes) with resilience patterns (Circuit Breaker, Retry, Bulkhead, Saga orchestration).
Telco CPQ Transformation Expertise  
Proven experience in Telco CPQ (Configure, Price, Quote) platforms, building scalable pricing engines, product catalogs, guided selling workflows, and automated quote-to-order processes. Track record of leading CPQ modernization programs, transforming legacy monoliths into cloud-native, AI-infused microservices.
Digital Transformation Experience  
Demonstrated success in enterprise-scale digital transformation, modernizing legacy systems into cloud-native microservices and enabling business agility. Preferably experienced in one or more CPQ transformation engagements within the Telco domain.

 

Skills/Competency	Proficiency Level
Hands on Proficiency in .NET CORE technologies - .NET 8+, C# 12, ASP.NET Core MVC, Web API, Entity Framework Core, LINQ, gRPC, SignalR for backend, Frontend - HTML5, CSS3, JavaScript (ES6+), TypeScript, SPA frameworks: Angular, React, or Blazor	Expert
Hands-On Proficiency and Experience working on at least one of the cloud-native platforms (AWS, Azure, GCP) for infrastructure and deployment	Advanced
Experience with Telco-Sales Capabilities and CPQ Platforms	Advanced
Strong background in AI/ML development, including experience with Large Language Models (LLMs), RAG, vector Search, prompt engineering building and deploying ML and conversational agents, agentic workflows on Cloud	Advanced
Strong Understanding and experience on multiple database technologies across both Relational and Non-Relational DBMS (MDB, MySQL, PostGres, VectorDB etc)	Advanced
Experience with test automation and quality assurance frameworks (TDD/BDD and tools like Robot, TestNG, Playwright and AI Augmented QA etc)	Advanced
Strong system design skills for building performant, scalable, highly available, reliable, and secure applications.	Advanced
Understanding of cybersecurity principles and data protection standards	Intermediate
Understanding of telecom products, services, and BSS/OSS architecture esp. Telco Sales Capabilities and CPQ Domain (Quoting and Pricing)	Expert
Knowledge on one or more S/W development methodologies like Agile Scrum, SAFe WoW )	Intermediate
Ability to manage complex stakeholder landscapes across business and technology teams	Advanced
Knowledge of TM Forum frameworks (eTOM, SID, Open APIs, ODA )	Intermediate
Effective communication, Excellent problem-solving and decision-making skills	Expert
Adaptability in dynamic, Agile, fast-paced, multi-cultural international environment	Advanced
Strategic thinking and alignment with business transformation goals	Intermediate

 

You bring rigor, passion for challenges, and determination. You seek the opportunity to expand your expertise, achieve your goals, and thrive.

• Global Opportunities: Work in multi-national teams with opportunity to collaborate with colleagues and customers from all over the world.
• Flexible Work Environment: Flexible working hours and possibility to combine work from office and home (hybrid ways of working).
• Professional Development: training programs and upskilling/re-skilling opportunities.
• Career Growth: Internal growth and mobility opportunities within Orange.
• Caring and Daring Culture: Health and well-being programs and benefits, diversity & inclusion initiatives, CSR and employee connect events.
• Reward Programs: Employee Referral Program, Change Maker Awards.

Regardless of your age, gender identity, race, ethnic origin, religion/belief, sexual orientation, marital status, neuroatypia, disability, veteran status or appearance, we encourage diversity within our teams because it is a strength for the collective and a vector of innovation. Orange Group is a disabled-friendly company and equal opportunity employer: don't hesitate to tell us about your specific needs.