Senior Java developer

We are looking for an experienced Senior Java engineer with 5+ years of commercial experience to join a large-scale data-driven platform with millions of users.

Requirements

5+ years of experience in development
Experience with Vert.x, Cassandra, Redis
Experience with AWS (EKS, S3, Lambda, etc.) and Cloudflare Serverless
Confident in using Git, Linux/Unix, Maven
English: Upper-Intermediate or Advanced

Will Be a Plus

Java Mastery: 5+ years with JVM internals (GC tuning/JIT optimization)
Distributed Systems: Production experience with 50k+ RPS systems
Data Modeling: Data locality, reads and writes amplification awareness

Responsibilities

System Architecture & Implementation

Migrate to use service based APIs from a monolithic architecture
Lead design of low-latency, event-driven architecture
Implement reactive patterns on k8, using Kafka, Flink, Quarkus and more

Performance Engineering

Conduct GC tuning for <100ms p99 latency

Design and improve distributed caching patterns

Comfortable with writing and running load testsCross-Functional Leadership

Co-create API specifications with mobile/desktop teams

Partner with DevOps on CI/CD pipeline enhancements

Mentor junior engineers through pair programming

Production Excellence

Own services from design through post-deployment monitoring
Conduct blameless post-mortems for incident analysis
Implement chaos engineering practices

Product

The platform processes large-scale real-time data and requires a skilled engineer to develop and optimize data pipelines, storage solutions, and analytics systems. You will work closely with a highly experienced Data Architect and collaborate with a strong engineering team to ensure high-quality delivery.

Work Schedule: Full-time working day in our office (flexible hours) or remote

Interview Stages

1-st stage — call with the Recruiter
2-nd stage — interview with the Java developer and the Recruiter
3-rd stage — Client interview

Benefits

Projects with modern stack
Work from anywhere (fully remotely or in our office)
Paid vacations and sick-leaves, additional days-off, relocation bonus
Wellness: Medical insurance/ sport compensation/ health check-up+flu vaccination at your choice
Education: regular tech-talks, educational courses, paid certifications, English classes
Fun: own football team, budget for team-lunches, branded gifts

Recruiter Mariia Katrych

Senior Java developer

Key Skills

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