Sinch is a Customer Communication Cloud company powering conversations across messaging voice and email helping businesses deliver personalized customer experiences at scale More than businesses including leading general tech companies rely on Sinch
The Role We are building the next generation of conversational AI infrastructure As a Senior Java Software Engineer on the Agentic Orchestration Platform team you will design build and own core components that coordinate AI agents workflow execution and multichannel communication via SMS WhatsApp and voice at scale
This is a zero to one opportunity to build a new platform from the ground up You will work on complex problems with high autonomy as part of a small senior team with significant impact You will collaborate with Engineering Manager Tech Lead Product Manager Domain Architect and cross functional teams
What You Will Do Design and build core platform components with high ownership and autonomy
Drive system design and create technical proposals




Work on distributed event driven systems combining deterministic workflows and AI agent behavior
Write production grade software including clean maintainable code with tests and documentation Build systems that are observable debuggable and resilient
Own full lifecycle including design deployment monitoring and on call responsibilities
Follow build ship run approach
Develop platform components integrating LLMs and AI agents
Work with prompt management context handling function calling guardrails and error recovery
Address challenges like testing non deterministic systems fallback strategies latency and cost optimization
Contribute to engineering excellence through architecture discussions code reviews and standards definition
Mentor team members and share knowledge
Collaborate across teams with product and technical stakeholders
Provide technical guidance and trade offs and align solutions with business needs
What We Are Looking For Five to eight plus years of professional so

📌 Sr Software Engineer (Madrid)
🏢 Sinch
📍 Madrid