Gábor Koródi

Senior Backend Java Engineer

Email: gkorodi@gmail.com
LinkedIn: gaborkorodi
Location: Boston, MA USA
Phone: +1.617.934.5617

Profile

Senior backend Java engineer with 20+ years of experience designing, building, and operating APIs, microservices, data integration platforms, and cloud-based backend systems. Strong background in Java, Spring Boot, RESTful APIs, SQL databases, messaging systems, AWS, and production support across healthcare, financial services, logistics, insurance, and research environments.

Known for translating complex business requirements into maintainable backend systems, improving performance and reliability, and collaborating effectively with product, data, infrastructure, and business teams. Experienced mentor and technical lead with a long history of owning systems from architecture through delivery and support.

Core Backend Skills

Java: Java 8/11/17/21, Spring Boot, Spring MVC, Spring Data JDBC/JPA, RESTful APIs
Cloud: AWS ECS/ECR, RDS, Lambda, SNS, API Gateway, DynamoDB, Terraform
Data: Postgres, MySQL, MongoDB, Kafka, SQL tuning, data ingestion pipelines
Architecture: Microservices, distributed systems, messaging, event-driven architectures, observability, TDD
Collaboration: Technical planning, mentoring, cross-functional delivery, production support

Experience

Java Developer, Consultant

TEKsystems

2026, Boston, MA


Backend Java developer supporting Chewy's pharmacy division, building orchestration logic across task-management services and improving API performance for backend workflows.

Fine-tuned Postgres queries to improve application performance and strengthen API responsiveness across multiple backend services.

Worked on GraphQL queries to allow efficient data retrieval and reduce hops between multiple components.

- AWS (· RDS (Postgres) · DynamoDB · ECR/ECS)
- Java 17/21 (· Spring Boot JPA, OpenAPI, Okta)

Senior Consultant

Valtech

2023-2025, Remote


Designed and implemented backend services and data integration systems across insurance, logistics, and financial services clients.

Built a monitoring service for Azure Service Bus that reduced support response time from days to minutes. The FastAPI/Python-based microservice monitored multiple queues on a Service Bus instance and integrated into Azure Monitor alerting.

Implemented Kafka-based data ingestion pipelines with a MongoDB persistence layer, collaborating with data engineering and data science teams to integrate them into a larger data ecosystem.

Developed a cloud-based Java/Spring MVC REST API supporting third-party external account validation.

- AWS (· ECS/ECR · RDS (MySQL))
- Azure (· Service Bus · Key Vault · Spring Apps / Container Apps)
- Java 17 (· Spring Boot JPA, JMS, REST)
- MongoDB (NoSQL) · Postgres (SQL)
- Python (FastAPI)

Java Developer, Consultant

S44

2021-2022, Remote


Translated complex business requirements into a flexible, parameterized Java library supporting international (CA and US) billing across time- and energy-based tariff constructs.

Developed a UI component for business users on a custom Directus platform that controls the inventory of pricing models for each customer's specification.

Contributed to a cloud-based Java Spring Boot microservices platform for Electrify America's charging station management, billing, customer onboarding, and OEM integration workflows.

- AWS (· ECS/ECR · RDS (MySQL))
- Java 11 (· Spring Data JDBC, Web MVC, Cloud OpenFeign)
- Python (FastAPI)
- Directus (Headless CMS)

Sr. Software Engineer

Bamboo Health

2020-2021,Remote


Worked on the Data Factory team responsible for ingesting and processing real-time patient data from medical facilities.

Improved infrastructure, monitoring, and performance for microservices handling patient-related data, with a focus on reliability, compliance, and data governance.

Collaborated with integration and data analytics teams to make healthcare data more usable across downstream systems, including maintaining ICD code refresh processes.

Built an AWS serverless messaging service that supported real-time communication to primary care physicians, with reporting and auditing backed by DynamoDB.

- AWS (· API Gateway · Lambda · SNS · DynamoDB)
· Athena · Redshift · Aurora · Elasticsearch - Java 8 / Kotlin · Spring (Data/JDBC, MVC, REST, OpenFeign)
- Grafana · Prometheus

Sr. Software Engineer

Harvard Medical School Dept. of Biomedical Informatics

2015-2020, Boston, MA


Built cloud-based data systems for biomedical research projects, helping scientists work with large-scale research data and precision medicine workflows.

Integrated a Java/Tomcat web application with multiple authentication providers, expanding research platform security and contributing to HIPAA certification efforts.

Architected the separation of a monolithic application into microservices and developed a Docker-based stack for scientific datastore workflows.

Co-developed RESTful APIs that enabled access to multiple biomedical data sources. Google Scholar Profile

- AWS (· Docker on EC2 · RDS (MySQL))
- Java 8/11 (· JDBC · Jetty/Tomcat/Wildfly)
- Jupyter (Notebook/Hub)
- Python/R

Chief Technologist

Story + Structure

2015, Boston, MA


Backend developer and architect of client projects.

Consulted with clients on best-of-breed solutions and participated in UI/UX design sessions and requirements gathering, that preceded the coding process.

Wrote Python and PHP-based web applications. Architected and developed proof-of-concept solutions that were further enhanced into production systems. Coded backend business logic, integrating with various databases. Implemented frontend code based on Human-Centered Design approach requirements.

Clearly communicated solution benefits and risks while ensuring code stability and providing training and support.

· PHP · WordPress · Laravel
· Python · Django
· MySQL

Middleware Developer

DTCC (was Omgeo)

2013-2015, Boston, MA


Team lead for a middleware development team in an agile environment, building mapping and routing logic with WebSphere Message Broker and WebSphere MQ for financial software products.

Designed a common data structure interface to enable mapping library usage across technology teams, speeding up time-to-market capabilities.

Managed pub/sub infrastructure and extended transformation capabilities to include an increasing number of asset classes.

· WebSphere MQ · WebSphere Message Broker
· Java EE 7 · Tomcat
· XML · XSLT · JSON · FIX

Software Engineer, Middleware Developer

State Street Corporation

2002-2013, Boston, MA
London, UK (2005-2006)


Delivered high-performance middleware and integration solutions for institutional investment banking systems within State Street's Global Markets unit.

Specialized in data transformation, routing, messaging, and pub/sub services for SWIFT, FIX, and XML data. Supported both real-time messaging and batch file-transfer workflows.

Completed a one-year assignment establishing a data transfer hub in the EMEA region, standardizing middleware practices and supporting regional IT teams.

Served on the global support team for middleware application technologies, including real-time messaging, file transfer, application integration, WMQ, WMB, SFTP, and Connect:Direct/NDM.

Developed, deployed and maintained middleware application for the company's Wealth Management and Private Client platform.

· WebSphere MQ · WebSphere Message Broker
· Java EE 7 · Tomcat
· XML · XSLT · JSON · FIX/SWIFT

Projects

BUSpark!

2025-2026, Boston, MA

Mentor

Advising and mentoring students in the BUSpark! program, which focuses on providing hands-on experience in software development and entrepreneurship.

Judging student hackathons and providing feedback to help improve their projects.

Harvard Extension School

2018-2023, Cambridge, MA / Remote

Teaching Assistant

Project-based class to introduce students to multi-stack development processes. Technologies included database and data structure design, RESTful API development, frontend frameworks, and cloud deployment strategies. Provided office hours and lead teams to produce MVP level products at the end of the semester.

Gábor Koródi — gkorodi@gmail.com — +1.617.934.5617


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