Highly experienced Senior Java Engineer with over 10 years of experience designing, building, and optimizing enterprise-level software solutions.
Aktualisiert am 14.02.2025
Profil
Freiberufler / Selbstständiger
Remote-Arbeit
Verfügbar ab: 14.02.2025
Verfügbar zu: 100%
davon vor Ort: 100%
Java
Spring Boot
Problemanalyse
React
JavaScript
Spring
JMS
Spring Integration
RabbitMQ
ActiveMQ
REST
SOAP
ELK
Microservices
GitHub
English
Fortgeschritten
Romanian
Fortgeschritten
Hungarian
Muttersprache

Einsatzorte

Einsatzorte

Satu Mare (+50km)
Deutschland, Schweiz, Österreich
möglich

Projekte

Projekte

9 Monate
2024-07 - 2025-03

Contributing to the migration of a legacy Ruby monolith

Software Engineer
Software Engineer
  • Contributing to the migration of a legacy Ruby monolith to a modern microservices architecture for a healthcare platform, resulting in improved system scalability, maintainability, and modularity.
  • Designing and developing high-performance microservices using Java 21 and Spring Boot, ensuring optimal performance, seamless integration, and alignment with healthcare-specific requirements.
  • Implementing a message-driven architecture with Google Pub/Sub, facilitating reliable, real-time communication between services and maintaining system integrity under high traffic loads.
  • Managing microservices deployment on Google Cloud Platform (GCP), leveraging cloud-native tools to maximize reliability, scalability, and cost-efficiency, while adhering to best practices.
Mediabrief LLC
4 Monate
2024-03 - 2024-06

Implemented new media and channel types

Senior Java Engineer
Senior Java Engineer
  • Implemented new media and channel types with customizable default rates, allowing flexible fee overrides based on client billing contracts, which led to an 80% increase in profit margins. Analyzed complex business requirements to ensure scalability and compatibility with existing systems.
  • Designed and developed efficient backend services using Java and Spring Framework to support enhanced media configurations, ensuring seamless integration into the client?s ecosystem while maintaining high reliability.
  • Utilized MySQL databases to optimize data structures, enabling faster access times and reducing system query bottlenecks, which improved overall application efficiency and user satisfaction.
  • Monitored and analyzed system performance using Splunk, identifying critical bottlenecks and implementing fixes to maintain consistent operational uptime and meet stringent SLA requirements.
Demand Side Platform / Ropardo
6 Monate
2023-09 - 2024-02

Migrate all critical services to AWS

Senior Java Engineer ? Squad Leader
Senior Java Engineer ? Squad Leader
  • Led a team to successfully migrate all critical services to AWS, reducing database latency by 60% through the strategic implementation of read-only and read-write request segregation. Coordinated across teams to mitigate risks during the migration process.
  • Designed Kafka-based streaming pipelines for real-time event processing, enabling the client to handle high throughput data efficiently while maintaining system stability during peak usage.
  • Partnered with stakeholders to define migration requirements, optimize workloads, and ensure seamless cloud infrastructure integration with existing platforms, improving system scalability and resiliency.
  • Actively utilized monitoring tools like Splunk to identify and resolve issues preemptively, ensuring minimal service disruptions during and after the migration.
Demand Side Platform / Ropardo
7 Monate
2023-03 - 2023-09

Revamped the bulk editing functionality for campaigns, ads, and targetings

Senior Java Engineer
Senior Java Engineer
  • Revamped the bulk editing functionality for campaigns, ads, and targetings, enhancing the user experience by 90% through redesigned UI components and added flexibility in operational workflows.
  • Refactored existing APIs, reducing response times by 75% and improving application scalability, while ensuring seamless backward compatibility for legacy systems.
  • Collaborated with cross-functional teams to align technical improvements with business objectives, ensuring the delivery of impactful solutions that address client pain points.
  • Conducted comprehensive code reviews and testing processes to maintain high-quality standards across the codebase, fostering a culture of technical excellence within the development team.
Demand Side Platform / Ropardo
5 Monate
2022-11 - 2023-03

Developed a comprehensive reporting feature

Senior Java Engineer
Senior Java Engineer
  • Developed a comprehensive reporting feature for advertising metrics, enabling clients to analyze campaign performance and spending trends with 80% greater efficiency, without compromising API response.
  • Integrated Elasticsearch and Druid into the data pipeline, delivering rapid data aggregation and retrieval to support real-time analytics.
  • Created modular backend services in Java, enabling seamless integration with existing systems and streamlining the deployment of additional features requested by the client.
  • Conducted extensive performance benchmarking, identifying and resolving bottlenecks in the data processing workflow to achieve consistent operational performance.
Demand Side Platform / Ropardo
4 Monate
2022-04 - 2022-07

Engineered a bid optimization algorithm

Senior Java Developer
Senior Java Developer
  • Engineered a bid optimization algorithm that increased ad views by 60% within budget constraints, leveraging advanced calculations of unique impressions, budget allocation, and campaign flight durations.
  • Designed and implemented strategies to reduce inefficiencies in bid pricing through robust analytical models, ensuring maximum ROI for advertisers.
  • Utilized HDFS and Spring Boot to create scalable systems capable of managing high-volume data transactions while maintaining system reliability and uptime.
  • Collaborated closely with business stakeholders and marketing teams to ensure the technical deliverables aligned with broader campaign objectives and KPIs.
Demand Side Platform / Ropardo
3 Jahre 1 Monat
2019-05 - 2022-05

Transitioned a monolithic application to a microservices architecture

Senior Java Developer / Office Process Manager
Senior Java Developer / Office Process Manager
  • Transitioned a monolithic application to a microservices architecture, reducing API response times by 60% and improving the overall system modularity and maintainability.
  • Enhanced the decision-making engine and rule management system, cutting processing times by 50% while improving the tracking and visibility of decision workflows.
  • Refactored a simulation engine using advanced technologies, decreasing client simulation response times by 80%, from 47 minutes to just 3 minutes, resulting in significant time savings and user experience.
P4B
1 Jahr 8 Monate
2017-10 - 2019-05

Integrated a caching layer

Senior Java Developer
Senior Java Developer
  • Integrated a caching layer into Garmin?s B2B marketplace platform, reducing response times by 40% and significantly enhancing the platform?s performance and user experience.
  • Designed scalable caching mechanisms to manage large datasets, ensuring quick data retrieval and reducing dependency on the underlying database systems.
  • Conducted rigorous system testing and optimization to deliver stable and efficient platform performance, ensuring seamless transactions during peak operational periods.
Dealer Resource Center / Garmin
1 Jahr
2016-03 - 2017-02

creating an interactive map with precisely marked agency locations

Java Full Stack Developer
Java Full Stack Developer
  • Increased agency location findability by 70% by creating an interactive map with precisely marked agency locations, allowing clients to easily find nearby offices and services.
  • Enhanced agency/agent reachability by 80% through the development of an advanced search engine that enabled customers to filter agents/agencies by spoken languages, product types, and other criteria.
Agency Locator | UNIQA Software Service
5 Monate
2015-11 - 2016-03

Designing a dynamic online form

Java Full Stack Developer
Java Full Stack Developer
  • Accelerated claim resolution time by 30% by designing a dynamic online form that adapts to user input, streamlining data collection and enabling agents to process claims faster and more accurately.
  • Improved data accuracy and user experience by minimizing input errors and ensuring agents received only relevant case information, resulting in a more efficient claim management process.
Insurance Claim Report Forms | UNIQA Software Service
1 Jahr 2 Monate
2014-10 - 2015-11

Developing responsive, editable UI components

CMS Developer
CMS Developer
  • Increased landing page creation speed by 50% by developing responsive, editable UI components, empowering marketing teams to build and customize pages without needing developer assistance.
Insurance Product Landing page| UNIQA Software Service

Aus- und Weiterbildung

Aus- und Weiterbildung

2019 ? 2021

Sapientia University | Bachelor in Computer Science | Targu-Mures


2011 ? 2015

Babe?-Bolyai University | Computer Science | Cluj Napoca

Kompetenzen

Kompetenzen

Top-Skills

Java Spring Boot Problemanalyse React JavaScript Spring JMS Spring Integration RabbitMQ ActiveMQ REST SOAP ELK Microservices GitHub

Produkte / Standards / Erfahrungen / Methoden

PROFESSIONAL SUMMARY

Highly experienced Senior Java Developer with over 10 years of experience designing, building, and optimizing enterprise-level software solutions. Skilled in delivering scalable, high-performance applications while driving technical innovation and aligning solutions with business requirements. Known for strong dedication to quality, efficiency, and measurable outcomes.


CORE COMPETENCIES

  • Frameworks & Libraries: Spring, Spring Boot, React, Drools
  • Version Control: Git, SVN
  • Data Processing: Kafka, ActiveMQ, Spark
  • Tools & Platforms: AWS, Kubernetes, Docker, Jenkins, RabbitMQ, GemFire
  • Web Development: HTML, CSS, jQuery, Velocity
  • Other Skills: Microservices Architecture, API Development, System Optimization
  • Leadership: Team Collaboration, Mentoring, Project Management, Problem Solving

Programmiersprachen

Java
Java EE
.NET
JavaScript
Node.js

Datenbanken

SQL
MySQL
MongoDB
Elasticsearch
Druid
HDFS
Oracle

Einsatzorte

Einsatzorte

Satu Mare (+50km)
Deutschland, Schweiz, Österreich
möglich

Projekte

Projekte

9 Monate
2024-07 - 2025-03

Contributing to the migration of a legacy Ruby monolith

Software Engineer
Software Engineer
  • Contributing to the migration of a legacy Ruby monolith to a modern microservices architecture for a healthcare platform, resulting in improved system scalability, maintainability, and modularity.
  • Designing and developing high-performance microservices using Java 21 and Spring Boot, ensuring optimal performance, seamless integration, and alignment with healthcare-specific requirements.
  • Implementing a message-driven architecture with Google Pub/Sub, facilitating reliable, real-time communication between services and maintaining system integrity under high traffic loads.
  • Managing microservices deployment on Google Cloud Platform (GCP), leveraging cloud-native tools to maximize reliability, scalability, and cost-efficiency, while adhering to best practices.
Mediabrief LLC
4 Monate
2024-03 - 2024-06

Implemented new media and channel types

Senior Java Engineer
Senior Java Engineer
  • Implemented new media and channel types with customizable default rates, allowing flexible fee overrides based on client billing contracts, which led to an 80% increase in profit margins. Analyzed complex business requirements to ensure scalability and compatibility with existing systems.
  • Designed and developed efficient backend services using Java and Spring Framework to support enhanced media configurations, ensuring seamless integration into the client?s ecosystem while maintaining high reliability.
  • Utilized MySQL databases to optimize data structures, enabling faster access times and reducing system query bottlenecks, which improved overall application efficiency and user satisfaction.
  • Monitored and analyzed system performance using Splunk, identifying critical bottlenecks and implementing fixes to maintain consistent operational uptime and meet stringent SLA requirements.
Demand Side Platform / Ropardo
6 Monate
2023-09 - 2024-02

Migrate all critical services to AWS

Senior Java Engineer ? Squad Leader
Senior Java Engineer ? Squad Leader
  • Led a team to successfully migrate all critical services to AWS, reducing database latency by 60% through the strategic implementation of read-only and read-write request segregation. Coordinated across teams to mitigate risks during the migration process.
  • Designed Kafka-based streaming pipelines for real-time event processing, enabling the client to handle high throughput data efficiently while maintaining system stability during peak usage.
  • Partnered with stakeholders to define migration requirements, optimize workloads, and ensure seamless cloud infrastructure integration with existing platforms, improving system scalability and resiliency.
  • Actively utilized monitoring tools like Splunk to identify and resolve issues preemptively, ensuring minimal service disruptions during and after the migration.
Demand Side Platform / Ropardo
7 Monate
2023-03 - 2023-09

Revamped the bulk editing functionality for campaigns, ads, and targetings

Senior Java Engineer
Senior Java Engineer
  • Revamped the bulk editing functionality for campaigns, ads, and targetings, enhancing the user experience by 90% through redesigned UI components and added flexibility in operational workflows.
  • Refactored existing APIs, reducing response times by 75% and improving application scalability, while ensuring seamless backward compatibility for legacy systems.
  • Collaborated with cross-functional teams to align technical improvements with business objectives, ensuring the delivery of impactful solutions that address client pain points.
  • Conducted comprehensive code reviews and testing processes to maintain high-quality standards across the codebase, fostering a culture of technical excellence within the development team.
Demand Side Platform / Ropardo
5 Monate
2022-11 - 2023-03

Developed a comprehensive reporting feature

Senior Java Engineer
Senior Java Engineer
  • Developed a comprehensive reporting feature for advertising metrics, enabling clients to analyze campaign performance and spending trends with 80% greater efficiency, without compromising API response.
  • Integrated Elasticsearch and Druid into the data pipeline, delivering rapid data aggregation and retrieval to support real-time analytics.
  • Created modular backend services in Java, enabling seamless integration with existing systems and streamlining the deployment of additional features requested by the client.
  • Conducted extensive performance benchmarking, identifying and resolving bottlenecks in the data processing workflow to achieve consistent operational performance.
Demand Side Platform / Ropardo
4 Monate
2022-04 - 2022-07

Engineered a bid optimization algorithm

Senior Java Developer
Senior Java Developer
  • Engineered a bid optimization algorithm that increased ad views by 60% within budget constraints, leveraging advanced calculations of unique impressions, budget allocation, and campaign flight durations.
  • Designed and implemented strategies to reduce inefficiencies in bid pricing through robust analytical models, ensuring maximum ROI for advertisers.
  • Utilized HDFS and Spring Boot to create scalable systems capable of managing high-volume data transactions while maintaining system reliability and uptime.
  • Collaborated closely with business stakeholders and marketing teams to ensure the technical deliverables aligned with broader campaign objectives and KPIs.
Demand Side Platform / Ropardo
3 Jahre 1 Monat
2019-05 - 2022-05

Transitioned a monolithic application to a microservices architecture

Senior Java Developer / Office Process Manager
Senior Java Developer / Office Process Manager
  • Transitioned a monolithic application to a microservices architecture, reducing API response times by 60% and improving the overall system modularity and maintainability.
  • Enhanced the decision-making engine and rule management system, cutting processing times by 50% while improving the tracking and visibility of decision workflows.
  • Refactored a simulation engine using advanced technologies, decreasing client simulation response times by 80%, from 47 minutes to just 3 minutes, resulting in significant time savings and user experience.
P4B
1 Jahr 8 Monate
2017-10 - 2019-05

Integrated a caching layer

Senior Java Developer
Senior Java Developer
  • Integrated a caching layer into Garmin?s B2B marketplace platform, reducing response times by 40% and significantly enhancing the platform?s performance and user experience.
  • Designed scalable caching mechanisms to manage large datasets, ensuring quick data retrieval and reducing dependency on the underlying database systems.
  • Conducted rigorous system testing and optimization to deliver stable and efficient platform performance, ensuring seamless transactions during peak operational periods.
Dealer Resource Center / Garmin
1 Jahr
2016-03 - 2017-02

creating an interactive map with precisely marked agency locations

Java Full Stack Developer
Java Full Stack Developer
  • Increased agency location findability by 70% by creating an interactive map with precisely marked agency locations, allowing clients to easily find nearby offices and services.
  • Enhanced agency/agent reachability by 80% through the development of an advanced search engine that enabled customers to filter agents/agencies by spoken languages, product types, and other criteria.
Agency Locator | UNIQA Software Service
5 Monate
2015-11 - 2016-03

Designing a dynamic online form

Java Full Stack Developer
Java Full Stack Developer
  • Accelerated claim resolution time by 30% by designing a dynamic online form that adapts to user input, streamlining data collection and enabling agents to process claims faster and more accurately.
  • Improved data accuracy and user experience by minimizing input errors and ensuring agents received only relevant case information, resulting in a more efficient claim management process.
Insurance Claim Report Forms | UNIQA Software Service
1 Jahr 2 Monate
2014-10 - 2015-11

Developing responsive, editable UI components

CMS Developer
CMS Developer
  • Increased landing page creation speed by 50% by developing responsive, editable UI components, empowering marketing teams to build and customize pages without needing developer assistance.
Insurance Product Landing page| UNIQA Software Service

Aus- und Weiterbildung

Aus- und Weiterbildung

2019 ? 2021

Sapientia University | Bachelor in Computer Science | Targu-Mures


2011 ? 2015

Babe?-Bolyai University | Computer Science | Cluj Napoca

Kompetenzen

Kompetenzen

Top-Skills

Java Spring Boot Problemanalyse React JavaScript Spring JMS Spring Integration RabbitMQ ActiveMQ REST SOAP ELK Microservices GitHub

Produkte / Standards / Erfahrungen / Methoden

PROFESSIONAL SUMMARY

Highly experienced Senior Java Developer with over 10 years of experience designing, building, and optimizing enterprise-level software solutions. Skilled in delivering scalable, high-performance applications while driving technical innovation and aligning solutions with business requirements. Known for strong dedication to quality, efficiency, and measurable outcomes.


CORE COMPETENCIES

  • Frameworks & Libraries: Spring, Spring Boot, React, Drools
  • Version Control: Git, SVN
  • Data Processing: Kafka, ActiveMQ, Spark
  • Tools & Platforms: AWS, Kubernetes, Docker, Jenkins, RabbitMQ, GemFire
  • Web Development: HTML, CSS, jQuery, Velocity
  • Other Skills: Microservices Architecture, API Development, System Optimization
  • Leadership: Team Collaboration, Mentoring, Project Management, Problem Solving

Programmiersprachen

Java
Java EE
.NET
JavaScript
Node.js

Datenbanken

SQL
MySQL
MongoDB
Elasticsearch
Druid
HDFS
Oracle

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