(Sr.) Java Engineer

Btse; Deutschland; Hybrid; EUR 70.000 - 120.000; Vollzeit

Zusammenfassung

BTSE is seeking a talented Java developer to join a crypto backend team building high-performance trading infrastructure. You will collaborate with PJM & PDM teams to design, implement, and test features, while contributing to code quality and API documentation.

You will design and optimize the core matching engine, order book management, and real-time data streams using WebSockets. A strong background in low-latency systems and Java concurrency is essential.

Qualifikationen

• Degree in CS or equivalent field.
• At least 5 years of professional Java development experience.
• Experience in crypto/blockchain/Web3 is a plus.
• Strong understanding of trading/matching engine mechanics (Price-Time Priority, order lifecycle, order book management).
• Experience building high-performance, low-latency, high-throughput systems; familiarity with in-memory computing or lock-free data structures preferred.
• Proficient in Apache Kafka for scalable, fault-tolerant, event-driven architectures.
• Proficient in Java; nice to have JavaScript, Python, or Golang.
• Proficient in Spring, Spring Boot, Jersey.
• Hands-on experience with WebSocket development.
• Proficient in Java concurrency and data structures.
• Proficient in relational databases and SQL.
• Positive attitude and ability to work in a fast-paced environment.
• Independent contributor with good communication skills.

Aufgaben

• Collaborate with team members on designing, developing, and unit-testing new features and modifications (≤140 chars).
• Design, optimize, and maintain the core matching engine, order book management, and transaction clearing components.
• Design data structures and utilize appropriate design patterns to model and implement business logic.
• Design and implement real-time, low-latency data streaming services using WebSockets or related protocols.
• Document source code and generate readable API documentation.
• Master software engineering tools like Git, Jenkins, and Maven.

Kenntnisse

Java

Low-latency systems

Distributed systems

Java concurrency

SQL

WebSocket

Apache Kafka

Spring

Spring Boot

Jersey

Git

Jenkins

Maven

Communication

Ausbildung

Degree in CS or equivalent

Tools

Apache Kafka

Spring Framework

Spring Boot

Jersey

Git

Jenkins

Maven

WebSocket

Jobbeschreibung

About BTSE:

BTSE Group is a global leader in fintech and blockchain technology, anchored by threecore business pillars: Exchange, Payments, and Infrastructure Development. Servingover 100 corporate clients worldwide, we provide white-label exchange and paymentsolutions. Our offerings encompass everything from exchange infrastructure hostingand development to custody, wallets, payments, blockchain integration, trading, andmore.We are looking for talented professionals in marketing, operations, customer support,and other departments. The roles offered may be on-site, remote, or hybrid, incollaboration with our local partner.

About the opportunity:

We are looking for talented and motivated individuals to join a dedicated and diverse team in building up an exciting new product. You will be working with our crypto backend expert team and cooperating with resourceful PJM & PDM teams. We offer a fantastic culture and great career prospects.

• Collaborate with team members on designing, developing, and unit-testing new features and modifications.
• Design, optimize, and maintain the core matching engine, order book management, and transaction clearing components.
• Design data structures and utilize appropriate design patterns to model and implement business logic.
• Design and implement real-time, low-latency data streaming services using WebSockets or related protocols.
• Document source code and generate readable API documentations.
• Master software engineering tools like Git, Jenkins, and Maven.
• Degree in CS or equivalent field.
• At least 5yr+ of professional experience in Java development.
• Experienced in crypto/blockchain/Web3 is a big plus.
• Solid understanding of trading/matching engine mechanics (e.g., Price-Time Priority, order lifecycle, order book management).
• Experience in building high-performance, low-latency, and high-throughput systems; familiarity with in-memory computing or lock-free data structures is highly preferred.
• Proficient in Apache Kafka for building scalable, fault-tolerant, and event-driven architectures
• Must be proficient in Java; nice to have: JavaScript, Python, or Golang.
• Proficient in mainstream Java application frameworks (e.g., Spring, Spring Boot, Jersey).
• Hands-on experience with WebSocket development for real-time applications.
• Proficient in various data structures and Java concurrency.
• Proficient in working with relational databases and SQL.
• Positive attitude and willingness to work in a fast-paced environment.
• Independent contributor with good communication skills for teamwork.
• Strong problem-solving skills.

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