Principal Engineer / Domain Architect
- Agentic Orchestration More than 150,000 businesses — including Google, Uber, Paypal, Visa, Tinder, and many others — rely on Sinch's Customer Communications Cloud to power engaging customer experiences through mobile messaging, voice, and email. Whether you need to verify users or craft omnichannel campaigns, Sinch makes it easy. Our AI-infused Super Network, APIs, and applications ensure you can connect with your customers reliably and securely, at every step of their journey. At Sinch we "Dream Big", "Win Together", "Keep it simple", and "Make it Happen". You will work across five teams of roughly 35 engineers in Spain, Belgium, Sweden, Germany, and Brazil, alongside the domain's product, design, and engineering leadership. You report to the Engineering Lead for the domain. Expect to spend about half your time writing code, mostly paired with engineers on the teams, in their codebases. Coherence and quality come from a small set of principles that we hold to. We pair and mob/ensemble to design, build, and spread knowledge. Architecture happens at the keyboard with the people who will own it. Agentic coding tools are changing how software is built faster than anyone has settled practices for. Diagrams, models, and maps are how we build shared understanding between engineers, product, design, and stakeholders. If it can't be drawn, it probably isn't understood yet. share and debate the architecture with them, then pair with them to build it. Own the domain's architecture: its boundaries, contracts, data flows, and the decisions behind them.



Set the direction for agentic engineering principles and practices in the domain and lead their adoption, from how we use AI coding tools to how we design, test, and operate agent-based systems. Grow technical leadership in the teams: coach tech leads and senior engineers, and raise the quality of design discussion across the domain. 10+ years building software, including significant time as a principal, staff, or architect-level engineer on distributed production systems. ~ Demonstrated commitment to engineering principles that keep a system coherent and of high quality, and a record of getting teams to adopt them. ~ Extensive pair or mob programming, and the belief that it is a primary way to design and build software, not an occasional practice. ~ Active, hands-on use of AI-based development tools (coding agents, LLM-assisted workflows) and an experimental mindset about where they help and where they don't. ~ Strong visual thinker: you use diagrams and models to build shared understanding across engineers, stakeholders, and everyone involved in making the software. ~ Polyglot: deep expertise in at least two languages, ideally including Java or another JVM language. Our systems are built mainly in Java and Go, with some TypeScript, and you can become productive in an unfamiliar language quickly. ~ Clear communicator in English. Experience with Temporal or similar workflow orchestration platforms. Familiarity with event-driven architectures and cloud-native infrastructure on AWS or GCP. At times, we may include a data-driven assessment to enhance our hiring success and identify candidates likely to excel.

📌 Principal Engineer (Madrid)
🏢 Sinch
📍 Madrid