Lead Java Developer

Description

We are building high-performance Java solutions for Fixed Income Rates and Credit trading desks within a global markets technology organization. As a Lead Java Developer, you will translate trading needs into scalable services, modernize existing components, and partner across regions to keep the platform reliable and fast—apply to join us. Please note that working from the office in Krakow 3 days per week is required. Responsibilities Design and deliver scalable Java applications that address complex business challenges Improve performance and maintainability by optimizing and refactoring existing components Facilitate UAT and run demonstrations with key stakeholders Convert business requirements into clear technical specifications Coordinate with global IT teams to enable seamless integration Support production releases and provide ongoing maintenance Develop cutting-edge solutions while sustaining a sophisticated, multi-faceted platform Requirements Proven track record with 5+ years of professional Java development experience Hands-on experience with low-latency and multi-threaded programming techniques Excellent problem-solving and analytical skills to tackle complex technical challenges Strong communication skills, able to explain complex technical concepts to non-technical stakeholders Willingness to learn quickly and adapt to new technologies and market changes English proficiency at B2 (Upper-Intermediate) level or higher Nice to have Understanding of financial markets, particularly Rates and Credit bonds/derivatives and trading platforms (e.g., Bloomberg, Tradeweb) Familiarity with messaging systems like Kafka and data serialization formats (e.g., AVRO) Knowledge of cloud platforms (Azure, AWS or GCP)

Requirements

• Proven track record with 5+ years of professional Java development experience

• Hands-on experience with low-latency and multi-threaded programming techniques

• Excellent problem-solving and analytical skills to tackle complex technical challenges

• Strong communication skills, able to explain complex technical concepts to non-technical stakeholders

• Willingness to learn quickly and adapt to new technologies and market changes

• English proficiency at B2 (Upper-Intermediate) level or higher

Responsibilities

• Design and deliver scalable Java applications that address complex business challenges

• Improve performance and maintainability by optimizing and refactoring existing components

• Facilitate UAT and run demonstrations with key stakeholders

• Convert business requirements into clear technical specifications

• Coordinate with global IT teams to enable seamless integration

• Support production releases and provide ongoing maintenance

• Develop cutting-edge solutions while sustaining a sophisticated, multi-faceted platform

Seniority

• Lead

Nice to have

• Understanding of financial markets, particularly Rates and Credit bonds/derivatives and trading platforms (e.g., Bloomberg, Tradeweb)

• Familiarity with messaging systems like Kafka and data serialization formats (e.g., AVRO)

• Knowledge of cloud platforms (Azure, AWS or GCP)