Senior Java Developer

Selby Jennings; Oakland (CA); Hybrid; USD 120,000 - 180,000; Full time

Job summary

Selby Jennings in Oakland seeks a Senior Java Software Engineer to join its market data and distributed systems team. This hybrid role focuses on building high-performance backend systems that process real-time data, ensure accuracy, and scale with demand. You will design Java components for throughput, contribute to data transformation and validation, and work with cross-functional teams to improve reliability, observability, and test coverage in a demanding financial data environment.

Qualifications

• 5+ years of professional software engineering experience.
• Experience building backend services, distributed systems, or data-processing platforms.
• Strong knowledge of data structures, algorithms, concurrency and system design.
• Experience with multithreaded, asynchronous, or performance-sensitive applications.
• Familiarity with streaming, event-driven, time-series, or large-scale data systems.
• Exposure to cloud environments, monitoring/observability tools, CI/CD, and automated testing.
• Proficient with Linux/Unix, SQL, Python, and scripting

Responsibilities

• Design and develop Java-based components for high-throughput data processing systems.
• Build solutions that transform, validate, and normalize time-series and event-driven datasets.
• Enhance platform performance, reliability, observability, and test coverage.
• Investigate and resolve production issues related to data quality, latency, throughput, and system behavior.
• Partner closely with domain experts, platform engineers, and infrastructure teams to deliver scalable, maintainable solutions.

Skills

Java

Distributed systems

Backend development

Concurrency

Event-driven

Time-series data

SQL

Python

CI/CD

Tools

Kafka

Protobuf

gRPC

Parquet

REST APIs

Job description

Senior Java Software Engineer | Market Data & Distributed Systems (No Sponsorships)

A leading technology firm serving the quantitative trading and capital markets industry is seeking a Senior Java Software Engineer to join its data systems team. This is a hybrid opportunity focused on building high-performance systems that process, validate, transform, and distribute large volumes of real-time market data.

This role is ideal for engineers who enjoy working on backend infrastructure, performance-sensitive applications, event-driven systems, and data-intensive platforms where reliability and correctness are critical.

What You'll Do

• Design and develop Java-based components for high-throughput data processing systems
• Build solutions that transform, validate, and normalize time-series and event-driven datasets
• Enhance platform performance, reliability, observability, and test coverage
• Investigate and resolve production issues related to data quality, latency, throughput, and system behavior
• Partner closely with domain experts, platform engineers, and infrastructure teams to deliver scalable, maintainable solutions

What They're Looking For

• 5+ years of professional software engineering experience
• Background building backend services, distributed systems, or data-processing platforms
• Solid understanding of data structures, algorithms, concurrency, and system design
• Experience working with multithreaded, asynchronous, or performance-sensitive applications
• Familiarity with streaming, event-driven, time-series, or large-scale data systems
• Exposure to cloud environments, monitoring/observability tools, CI/CD, and automated testing
• Comfortable with Linux/Unix environments, SQL, Python, and scripting tools

Nice to Have

• Experience within financial markets, trading technology, exchanges, or other high-volume data environments
• Familiarity with technologies such as Kafka, Protobuf, gRPC, Parquet, REST APIs, and related tooling