Senior Software Engineer - Java

Senior Software Engineer - Java
Bucureşti
Bucharest, Bucharest, Romania

At Flow
X. AI we are building the engine for the next generation of cognitive enterprise systems - because we believe enterprise software is the software layer that our civilization relies on. Today, our AI platform is used in large banks and empowers both new and experienced users to leverage AI to build complex mission critical applications.

We believe amazing things are created by small teams of brilliant people. Our engineering team today is an
- star team - and we work to keep it that way. It’s quality over quantity.

Mission

We’re building
- performance agents using a modern tech stack, and we’re looking for a
- class engineer to help us push the limits.

This is a
- impact engineering role at the intersection of backend development, distributed systems, and applied AI, ideal for a highly experienced and independent contributor who thrives in
- paced,
- focused environments. You will play a key role in designing and implementing backend services that power our AI orchestration, agentic workflows, and
- grade integrations.

What you would do on a daily basis

• Build backend microservices in Java 11+ / Spring Boot for AI-powered workflows.
• Build
  - driven components with Kafka for AI pipelines.
• Design and implement advanced AI capabilities using our platform infrastructure.
• Integrate services with AI frameworks and enterprise systems.
• Write clean unit and integration tests and uphold engineering best practices.
• Troubleshoot and improve production systems.
• Collaborate with backend engineers, AI engineers, frontend, QA, and product teams.

Who you are

• 7+ years as a software engineer, with solid proficiency in core Java libraries and frameworks.
• 5+ years with Java Spring Boot.
• Experience with distributed microservices and Apache Kafka.
• Strong SQL/No
  SQL skills; graph DB experience is a plus.
• Expertise in reactive components and event streaming architectures.
• Hands-on experience with g
  RPC.
• Familiarity with Docker/Kubernetes.
• Bonus: AI frameworks, vector/graph databases, S3 storage, functional languages, or Python.
• Strong
  - solving ability and communication skills.

What's in it for you

• Build core components of an AI-native enterprise platform.
• Work alongside AI experts and contribute to
  - impact client solutions.
• Fast-paced, collaborative environment with room for growth.
• Early-stage equity package, with the opportunity to grow alongside the company.

Location

Bucharest – hybrid or onsite