Senior Backend Engineer (Java)

TL;DR

Senior Backend Engineer (Java): Building and evolving hirify.global’s billing/usage platform, a core system for tracking usage, calculating charges, and ensuring accurate data with an accent on designing and implementing scalable data pipelines and services. Focus on improving accuracy, reducing latency, increasing transparency of billing processes, and supporting new product metrics and dynamic pricing models.

Location: Requires relocation to Spain or Bulgaria

Company

hirify.global transforms technology complexity into business opportunity as the leader in enterprise orchestration with an AI-powered platform.

What you will do

• Design, implement, and maintain data pipelines and streaming jobs for billing and usage processing using Flink and Java.
• Develop aggregation and reconciliation logic in ClickHouse, ensuring accuracy and consistency across billions of records.
• Build high-performance APIs and services for consumption by internal teams.
• Ensure data quality, integrity, and compliance with SLAs and financial reporting standards.
• Collaborate with cross-functional stakeholders to define, evolve, and document billing data models and processing logic.

Requirements

• 5+ years of experience in development of data-intensive backend systems.
• Strong proficiency in Java (core language for streaming and backend processing).
• Solid experience with ClickHouse (data modeling, query optimization, performance tuning).
• Experience with Apache Kafka and streaming frameworks like Apache Flink, Kafka Streams, Kafka Connect.
• Strong SQL skills applied to OLAP use cases, including complex aggregations and query optimization.
• Good communication skills and experience collaborating in distributed international teams.
• Advanced English level (C1).

Nice to have

• Experience designing Usage/Billing systems.
• Experience with data quality frameworks.
• Experience with managing data intensive infrastructure.
• Experience with Ruby on Rails framework.

Culture & Benefits

• Flexible, trust-oriented culture empowering everyone to take full ownership of their roles.
• Driven by innovation and looking for team players.
• Balancing productivity with self-care in a vibrant and dynamic work environment.
• Recognized as a top enterprise startup, cloud company, and best company for remote workers by various publications.