Senior Java Architect — Remote, High-Impact Backend

Infinni Innovations S.A.; United States; Remote; USD 100,000 - 167,000; Full time

Benefits offered by this job

Relocation package to Spain

Remote work within EU

Annual company offsite

Career growth opportunities

Job summary

INFINNI is seeking a senior backend engineer to design systems and write code for scalable, high-throughput services. You’ll shape architecture, own critical components, and stay hands-on with the codebase.

You will work on distributed systems where concurrency and data integrity matter. You’ll lead architectural decisions, build event-driven data flows using Kafka, and optimize data models across PostgreSQL, Redis, and analytical stores.

Qualifications

• At least 5 years as Senior Developer or Architect.
• Expert-level Java proficiency with Spring/Hibernate/JPA.
• Strong knowledge of multi-threading and concurrency in Java.

Responsibilities

• Design, build, and evolve backend services in Java (and Go where appropriate).
• Define architecture for distributed, horizontally scalable systems.
• Build event-driven data flows with Kafka and ensure eventual consistency.
• Model data across PostgreSQL, Redis and analytical stores.
• Write efficient, safe concurrent code and review others’ designs.
• Tune latency, throughput, and memory usage, incl. JVM GC tuning.
• Build and run services on AWS with DevOps collaboration.
• Mentor engineers through code reviews and design discussions.

Skills

Java

Spring Framework

Concurrency

Kafka

PostgreSQL

Redis

AWS

JVM Tuning

Hibernate/JPA

Tools

Kafka

PostgreSQL

Redis

AWS

Job description

INFINNI is seeking a senior backend engineer to design systems and write code for scalable, high-throughput services. You’ll shape architecture, own critical components, and stay hands-on with the codebase.

You will work on distributed systems where concurrency and data integrity matter. You’ll lead architectural decisions, build event-driven data flows using Kafka, and optimize data models across PostgreSQL, Redis, and analytical stores.