Senior Software Engineer (Java/Kotlin) AI-driven Systems B2B

Flix; United States; Remote; USD 48,000 - 60,000; Full time

Job summary

Flix is seeking an experienced Software Engineer to join on a freelance/service agreement basis (B2B). You will contribute to a critical product ensuring seamless coordination with Mobility Partners across the globe.

We expect 6+ years in Java and/or Kotlin, with distributed systems experience, and a strong product mindset. You will work with Spring Boot, Kafka, and modern data stores, from Poland or globally as a remote contractor.

Qualifications

• 6+ years of Java or Kotlin engineering experience with distributed systems.
• Experience with Spring/Spring Boot, Kafka, databases (MySQL/Postgres, Redis, MongoDB), and S3.
• Ability to architect, write clean, well-tested code, and own technical challenges.
• Strong communication in a distributed team and a data-driven product mindset.

Responsibilities

• Collaborate with a distributed, cross-functional team on product development.
• Co-design new products and improve existing ones using cutting-edge technologies.
• Drive development in an Agile environment with user-centered solutions.
• Support technical decisions and mentor teammates to raise technical excellence.
• Define and deliver products that optimize coordination with Mobility Partners.

Skills

Java

Kotlin

Distributed systems

Spring Boot

Kafka

Databases

English proficiency

Tools

Docker

Kubernetes

GitLab CI

AWS

Terraform

Snowflake

Job description

Flix is seeking an experienced Software Engineer to join on a freelance/service agreement basis (B2B). You will contribute to a critical product ensuring seamless coordination with Mobility Partners across the globe.

We expect 6+ years in Java and/or Kotlin, with distributed systems experience, and a strong product mindset. You will work with Spring Boot, Kafka, and modern data stores, from Poland or globally as a remote contractor.