Senior Java AI Platform Engineer

Sinch; España; On-site; EUR 60,000 - 80,000; Full time

Job summary

Sinch, a Customer Communication Cloud company, is hiring a Senior Java Software Engineer for the Agentic Orchestration Platform. You will design and own core components coordinating AI agents and multi-channel communication at scale.

You will work with a small senior team, have autonomy, and tackle non-deterministic testing, latency, and cost challenges while integrating LLMs and prompt management.

Qualifications

• Five to eight plus years of professional software engineering experience.
• Strong backend and platform skills including distributed systems, microservices, event-driven architectures and cloud-native design.
• Ability to explain architectural trade offs clearly.
• Strong engineering fundamentals including clean code, testing strategies, debugging production systems and building reliable long lasting systems.
• Experience with Java, Spring, AI, TypeScript or React; deep expertise in at least two core backend technologies and willingness to learn others quickly.
• Experience using AI coding tools such as Copilot, Claude, Code Cursor or similar.
• Understanding benefits, risks and best practices.
• Ability to work autonomously, define scope and deliver solutions independently; strong prioritization decisions.
• Experience with cloud and operations including AWS, Docker, Kubernetes, CI/CD, GitOps, infrastructure as code and monitoring.
• Strong communication skills with both technical and non-technical stakeholders; Fluent English required.

Responsibilities

• 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 observable, debuggable, and resilient systems.
• 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, fallbacks, 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.

Skills

Backend systems

Distributed systems

Microservices

Event-driven

Cloud native

Java

Spring

AI/LLM tooling

TypeScript

React

CI/CD

Docker

Kubernetes

GitOps

AWS

Kafka

Temporal

Code Cursor

Copilot

Tools

Docker

Kubernetes

CI/CD

GitOps

AWS

Kafka

Temporal

Code Cursor

Copilot

Job description

Sinch, a Customer Communication Cloud company, is hiring a Senior Java Software Engineer for the Agentic Orchestration Platform. You will design and own core components coordinating AI agents and multi-channel communication at scale.

You will work with a small senior team, have autonomy, and tackle non-deterministic testing, latency, and cost challenges while integrating LLMs and prompt management.