Software Engineer - Query Execution (Java)

Location: Portugal — Remote

Company

hirify.global provides a unified lakehouse platform for self-service analytics and AI, built on open-source technologies such as Apache Iceberg and Apache Arrow.

What you will do

• Implement, test, debug, and maintain query operators, expression evaluation, execution scheduling, and resource-management components.
• Write clear, maintainable Java code with unit and integration tests, documentation, and code reviews.
• Investigate query correctness, reliability, and performance issues using profiles, logs, telemetry, benchmarks, and production data.
• Build knowledge of vectorized processing, concurrency, memory usage, parallelism, data exchange, and disk spilling.
• Collaborate with senior engineers and partner teams to define requirements, break down work, and deliver incremental improvements.
• Use AI-assisted tools for code comprehension, debugging, test generation, and documentation while validating the results.

Requirements

• Up to two years of professional software development experience, or equivalent experience through internships, coursework, or substantial personal projects.
• Proficiency in Java or another object-oriented programming language and willingness to work in a large Java codebase.
• Understanding of data structures, algorithms, and basic concurrency concepts.
• Ability to solve well-defined technical problems, communicate progress, raise blockers, and apply feedback.
• Commitment to tested, maintainable code and established development practices.
• Bachelor’s degree in Computer Science, a related technical field, or equivalent practical experience.

Nice to have

• Exposure to database internals, query processing, distributed systems, or large-scale data processing.
• Familiarity with profiling, memory management, concurrency, or vectorized processing.
• Experience with C++, Apache Arrow, Parquet, Apache Iceberg, Spark, Hadoop, cloud object stores, or open-source contributions.

Culture & Benefits

• High standards for clarity, accountability, respectful collaboration, and results.
• Opportunities to participate in design discussions, code reviews, receive feedback, and take on broader technical responsibility.
• Support for necessary accommodations during the application and interview process.
• Equal opportunity employment and commitment to workforce diversity.