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Senior Java Engineer
Location
Montenegro
Posted
2 days ago
Salary
$5K / month
Seniority
Senior
Job Description
Senior Java Engineer
Alex Staff Agency
• Design, scale, and maintain real-time advertising bidding systems (DSPs, RTB Exchanges, and SSP platforms). • Optimize backend services using Java (Spring Boot / WebFlux) and Go (Golang) to meet strict low-latency SLA/SLO targets. • Build and manage data-intensive architectures utilizing high-load storage solutions (Aerospike, ClickHouse) and event-driven messaging (Apache Kafka). • Participate in R&D initiatives involving GenAI, integrating Agentic AI frameworks (LangChain, LangGraph, N8N) for workflow automation and predictive analytics. • Take full ownership of features end-to-end, contributing to the frontend layer (React / TypeScript) for internal tools and dashboards when required.
Job Requirements
- 5+ years of commercial software development experience with Java as the primary language.
- Deep knowledge of the Spring ecosystem (Boot, Data, MVC, Security, Cloud) and strong practical experience with reactive/asynchronous programming (Spring WebFlux / Project Reactor).
- Solid understanding of distributed systems, concurrency, and performance tuning at the JVM level.
- Strong verbal English skills at B2 level or higher, with the ability to explain architectural decisions and collaborate directly with a global engineering team during voice calls.
- Location outside of the Russian Federation due to contractual and payment restrictions. Candidates from Belarus are eligible only if they possess an active legal entity/IP in Georgia or Europe for international payments.
- Commercial programming experience or strong familiarity with Go (Golang).
- Hands-on experience with high-load and Big Data tools including Apache Kafka, ClickHouse, and Aerospike.
- Real-world experience or deep interest in LLMs and AI orchestration tools such as LangChain, LangGraph, or N8N.
- Familiarity with frontend development using ReactJS and TypeScript.
Benefits
- Opportunity to work on production infrastructure handling 1 trillion + daily requests.
- Work within a team of senior engineers with direct impact on the platform's architecture.
- Choice between a fully remote schedule or a hybrid format from the office in Budva, Montenegro.
- Stable monthly payments in USD via international B2B contracts.
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