Sr Java Developer

Role & responsibilities

Anchor a squad building billing, activation, CRM and marketplace services: service design, code that moves money, mentoring L1 developers, production ownership.

Preferred candidate profile

Sr. Java developer engineer who owns services end-to-end in production (5-7 years): designed from a blank page, ran it live, carried the pager

Mandatory do not submit without these

• Java 11 (17/21 preferred) with Spring Boot in production — several years, not one project
• Strong SQL: transactions, isolation levels, query tuning on PostgreSQL/Oracle/MySQL at real data volumes
• Designed and shipped a service from blank page to production; can defend the decisions
• Kafka or equivalent messaging in production; REST API design (OpenAPI-first a plus)
• Testing discipline: JUnit integration tests as habit; Docker/Kubernetes deployment familiarity

Nice to have — tie-breakers, not filters

• Payments / billing / subscriptions / telco-BSS domain — anything where a wrong number is an incident
• jOOQ, Flyway, Debezium/CDC, Testcontainers on the CV
• Performance tuning war stories at scale; fluent-and-critical use of AI coding tools

Stack we look for on the CV: Java 17/21 • Spring Boot 3 • PostgreSQL • Kafka • REST/OpenAPI • JUnit 5 • Docker/K8s • Git CI/CD. jOOQ, Flyway, Testcontainers are the “knows our exact stack” tells.