Key Responsibilities:
- Develop and maintain high-quality Java applications, focusing on performance, scalability, and code quality.
- Utilize advanced Java collections and data structures, demonstrating a thorough understanding of implementation details (e.g., hashcode usage, collision handling in HashMap, and the differences between HashMap and TreeMap).
- Apply concurrency principles with practical experience in synchronization, volatile variables, locks, and thread-safety practices.
- Optimize threading models using threads, thread pools, and manage resources to avoid CPU starvation.
- Implement, analyze, and optimize sorting and search algorithms based on their time and space complexity, and select the best algorithms based on the task requirements.
- Conduct comprehensive code reviews with a focus on design, business logic, and technical optimization.
- Use design patterns (behavioral and structural) to create efficient, maintainable, and scalable code. Engage in system design for complex, distributed software solutions, ensuring high availability and reliability.
- Utilize Docker for containerizing applications and improving deployment and scalability.
- Write and optimize SQL queries, utilizing different types of joins, and applying WHERE vs. HAVING clauses for optimal performance.
- Troubleshoot, profile, and optimize Java applications for performance improvements.
Essential Skills and Qualifications:
- Strong Core Java Knowledge: Proficiency with Java collections, data structures, and in-depth understanding of HashMap and TreeMap implementations. Concurrency and Threading.
- Hands-on experience with synchronization, volatile variables, locks, concurrent data structures, and atomics.
- Algorithms and Data Structures: Solid understanding of sorting and search algorithms, their complexities, and use cases.
- Java Profiling/Troubleshooting: Experience with identifying and resolving performance issues in Java applications.
- Code Review Skills: Ability to assess code from design, business, and technical perspectives to ensure high standards.
- Design Patterns: Familiarity with behavioral and structural design patterns (e.g., GoF patterns).
- System Design Expertise: Proven experience in designing large, scalable systems.
- Docker: Practical experience with containerization and deployment.
- SQL Knowledge: Proficiency with SQL queries, including various types of joins and filtering mechanisms.
- Unix/Linux Experience: Familiarity with basic commands like grep, less, vi, etc.
Preferred Qualifications (Not Mandatory):
- Messaging Systems: Practical experience with messaging systems such as Kafka, Solace, or MQ.
- Kubernetes/OpenShift/Public Cloud: Experience deploying and managing applications in cloud-native environments.
- NoSQL Databases: Knowledge of MongoDB or similar non-relational databases.
- Foreign Exchange (FX) Knowledge: Familiarity with FX markets or related systems.
- Large Distributed Systems: Experience with distributed systems and architectures.
Salary
Competitive
Monthly based
Location
, Kutno County, Łódź Voivodeship, Poland, Łódź Voivodeship, Poland
Job Overview
Location
, Kutno County, Łódź Voivodeship, Poland, Łódź Voivodeship, Poland
