Principal Software Engineer (IC5)

YOUR NEW ROLE This role is for CODE LEAP’s client company - JTL-Software JTL-Software is one of Germany’s leading providers of e-commerce and ERP solutions. More than 50,000 retailers rely on JTL every day to run their business. Our global development center in Vietnam is looking for talented people to build the next generation of these products. You’ll work in an international team that pairs German software quality and Vietnamese speed to innovate.

We are looking for a Principal Engineer to join Agentic Layer Juno, our core AI Platform project. Juno is the

foundation for AI capabilities across our products - powering agentic workflows, LLM integrations, and

intelligent automation that other teams build on.

As a Principal Engineer, you will shape the architecture and technical direction of the platform from its

early stages. You’ll design scalable, production-grade backend systems, drive key decisions around agent

orchestration, LLM integration, and platform reliability, and set engineering standards that will carry the

platform as it grows.

TEAM SCOPE

• The AI Platform team owns Agentic Layer Juno — the central foundation for AI capabilities across our products

YOUR EXCITING TASKS

• Own the technical vision and architecture of the AI platform - agent orchestration, LLM integration layers, tool/MCP integrations, and the APIs other teams build on
• Make and document high-impact architectural decisions, navigating trade-offs between velocity, cost, reliability, and flexibility (e.g. model choice, orchestration patterns)
• Design the platform for multi-tenancy, extensibility, and scale so product teams can adopt AI capabilities without reinventing the foundation
• Keep the platform ahead of a fast-moving AI landscape: evaluate new models, frameworks, and patterns, and decide what’s worth adopting
• Build production-grade backend services and platform components - this is a coding role, not a pure architect role
• Develop core capabilities like agent workflows, RAG pipelines, vector search, context management, and safe tool execution
• Set the bar for engineering quality: testing strategies for non-deterministic AI systems, evals, CI/CD, and code review culture

YOUR PROFILE AND YOUR PERSONALITY

• 10+ years of software engineering experience, including experience in architect, or technical leadership role
• Deep expertise in C# and a proven track record of building scalable, production-grade backend systems and APIs
• Hands-on experience building and deploying AI-powered applications, including agentic systems, LLM integrations, RAG, and vector search
• Experience designing and operating distributed, cloud-native systems with a strong focus on scalability, reliability, and performance
• Solid understanding of software architecture, observability, security, and operational excellence in production environment
• Comfortable evaluating new technologies, navigating architectural trade-offs, and making sound technical decisions
• Design and build multi-agent orchestration systems using frameworks such as LangChain, LangGraph, CrewAI, AutoGen, MAF, Semantic Kernel, or custom orchestration layers
• Solid experience working with Azure or other cloud environments
• An effective communicator and technical leader who enjoys mentoring engineers, driving engineering standards, and collaborating across teams

Nice To Have

• Experience taking agentic or LLM-based systems from prototype to production at scale (cost control, latency optimization, guardrails)
• Familiarity with AI evaluation and quality frameworks - building evals, monitoring model drift, measuring agent success rates
• Hands-on experience with orchestration frameworks (e.g. Semantic Kernel, LangGraph, or custom-built) and tool-calling / MCP-style integrations
• Experience with prompt engineering at scale, fine-tuning, or model selection trade-offs across providers
• Experience in a scale-up environment where they shaped engineering practices as the org grew

Benefits Await You

• Competitive salary and benefits
• Year-end bonus (13th-month salary)
• Generous annual leave of up to 18 days
• Additional premium health insurance
• Enjoy an endless selection of delicious refreshments, including gourmet coffee, beverages, snacks, and fresh fruits, all complimentary
• Dynamic, fun, and agile environment, perfect for sharing and creativity
• Open-minded, kind & humble colleagues

CONTACT Come t…