Umit is available for hire
Hire UmitUmit Soylu
Verified Expert in Engineering
Back-end Developer
Gdynia, Poland
Toptal member since August 28, 2019
Bio
Umit is a seasoned senior staff engineer with experience in both on-premise and cloud applications used in the aerospace, defense, data, and travel industries. He has taken part in the entire development lifecycle, including design, development, testing, deployment, documentation, and maintenance. Umit shines in his ability to automate systems with defensive programming techniques and thorough coding practices, resulting in highly available, very stable, and secure systems.
Portfolio
Visa
Payments, High-load
TripActions
Travel, APIs, API Integration, Java 11, Amazon Web Services (AWS), Async/Await...
Alteryx (via Toptal)
Spring, Spring MVC, Mailing, Cron, jQuery, Apache Velocity, Datalog, Swagger...
Experience
- Back-end Development - 16 years
- Java - 15 years
- Software Architecture - 13 years
- Enterprise Architecture - 12 years
- Spring MVC - 10 years
- Technical Leadership - 9 years
- MySQL - 7 years
- Amazon Web Services (AWS) - 7 years
Work Experience
Senior Staff Software Engineer
2024 - PRESENT
Visa
- Led the design and implementation of a configurable rule engine processing over 20 million daily transactions, managing stakeholders, and coordinating multi-regional cross-functional teams.
- Overhauled processes to implement best practices, achieving over 30% efficiency improvements.
- Managed a team of more than 10 engineers and onboarded new tools for company-wide use cases.
Technologies: Payments, High-load
Staff Engineer
2022 - PRESENT
TripActions
- Re-architected an existing app for automated error handling, better metrics and visibility, and disposed of faulty logics. This re-architecturing led to increased stability, better UX, and higher usage of the system.
- Managed team and agile streams via Jira and Confluence. Managing agile streams allowed stakeholders to understand the current workload, team capacity requirements, and other areas the current project lacks.
- Observed the system via New Relic while enhancing the metrics, which allowed detection of problems in the source of origin, not at the end of business logic which allowed better error management and bug fixing.
Technologies: Travel, APIs, API Integration, Java 11, Amazon Web Services (AWS), Async/Await, New Relic, Apache Kafka, Back-end Development, Jakarta EE (Java EE or J2EE), REST APIs, Java, Enterprise Architecture, Docker, Hibernate, Spring Boot, Architecture, Back-end, Software Architecture, Solution Architecture, Automation, Relational Databases, SQL, Technical Writing, Technical Diagrams, Team Leadership, Kubernetes, B2B, Enterprise SaaS, Startups, Project Management, Inventory Management, Technical Architecture, CTO, Leadership, Technical Leadership, Microservices, Git, CI/CD Pipelines, Microservices Architecture, Event-driven Programming, Event-driven Architecture, API Development, Architectural Patterns, SaaS, API Architecture, Cloud Architecture, Separation of Concerns (SoC), EventBus, Amazon EC2, AWS Cloud Architecture, IntelliJ SDK, Apache Maven, Software Design, RESTful Microservices, Amazon EKS, JVM, NoSQL, Code Review, Software Development, Distributed Systems, Containerization
Technical Lead
2020 - 2022
Alteryx (via Toptal)
- Maintained an app that is used by 10,000+ customers daily. While providing technical guidelines about how to maintain current features, I advised on how to develop new features relevant to the app's current state.
- Tracked, fixed, and documented bugs using the Agile approach.
- Documented existing features using a reverse engineering approach, such as digging deep into the legacy code.
- Provided DevOps support even though it was not on the job description. Automated existing pipelines for further efficiency.
Technologies: Spring, Spring MVC, Mailing, Cron, jQuery, Apache Velocity, Datalog, Swagger, Jira, OAuth, Liquibase, SQL, MariaDB, PostgREST, Apache Lucene, Kotlin, GitLab CI/CD, Back-end Development, Jakarta EE (Java EE or J2EE), REST APIs, Java, PostgreSQL, Enterprise Architecture, Spring Boot, Back-end, Software Architecture, JavaScript, Relational Databases, Team Leadership, Google Cloud Platform (GCP), Kubernetes, B2B, Inventory Management, Technical Architecture, Leadership, Technical Leadership, Git, CI/CD Pipelines, API Gateways, Event-driven Architecture, API Development, API Architecture, Separation of Concerns (SoC), IntelliJ SDK, Apache Maven, DevOps, Software Design, RESTful Microservices, Amazon EKS, JVM, Code Review, Software Development, Distributed Systems, Solution Architecture
Instructor
2020 - 2022
BilgeAdam (Bilgeadam.com)
- Trained newly graduated software developers and alike in Java and web development.
- Trained experienced software developers in web development using Java and Spring Boot tools.
- Assigned projects (2 to 3 months long) to attendants, oversaw their progress, and evaluated those projects in terms of reliability, completeness, durability, and responsiveness.
Technologies: Hibernate Query Language (HQL), Spring Boot, Java 8, Android Studio, Mobile, Java, PostgreSQL, JavaScript, Relational Databases, SQL, Leadership, Git, Separation of Concerns (SoC), Amazon EC2, IntelliJ SDK, Apache Maven, DevOps, RESTful Microservices, JVM, Software Development
Software Developer | Team Leader
2018 - 2021
Turkish Naval Research Center Command
- Designed, implemented, and documented software systems while preparing for the deployment process using a Java 8-based custom software development environment.
- Improved the current custom Java 8 software-development environment with constructive feedback and deployment of the new generic system tools.
- Created and implemented JUnit test guidelines to increase the coverage of unit tests, further automate the system, and allow new team members to quickly ingest current software development policies.
- Tutored new team members for software development lifecycle processes and defensive programming paradigms using my open-source documents.
- Detected software bugs in the predeployment phase to further increase the reliability of the system.
- Analyzed and provided feedback for the given software systems regarding reliability, accuracy, and completeness.
Technologies: Amazon Web Services (AWS), Jenkins, MySQL, Linux RHEL/CentOS, Solaris, Spring Cloud, GitHub, Swagger, Spring Microservice, Hibernate Query Language (HQL), Java Servlets, Hibernate, Spring, Spring MVC, Agile Software Development, Scrum, Java, REST APIs, Jakarta EE (Java EE or J2EE), Back-end Development, TortoiseSVN, DOORS, Eventum, Java 8, PostgreSQL, Enterprise Architecture, Unix Shell Scripting, Architecture, Back-end, Software Architecture, Solution Architecture, API Integration, Automation, Relational Databases, SQL, Technical Writing, Technical Diagrams, Team Leadership, B2B, Enterprise SaaS, Minimum Viable Product (MVP), Project Management, Inventory Management, Technical Architecture, Leadership, Technical Leadership, Microservices, Git, CI/CD Pipelines, API Gateways, Microservices Architecture, APIs, Event-driven Programming, Event-driven Architecture, API Development, Architectural Patterns, SaaS, API Architecture, Separation of Concerns (SoC), EventBus, IntelliJ SDK, Apache Maven, DevOps, Software Design, RESTful Microservices, JVM, NoSQL, Code Review, Software Development, Distributed Systems, Containerization
Software Developer
2013 - 2018
Turkish Naval Research Center
- Created a software-system design using Ada 83 for multiple Unix-based platforms using defensive programming techniques where high reliability and safety concerns are met.
- Designed, developed, deployed, documented, and maintained multiple software systems.
- Analyzed software items in terms of performance and reliability using MATLAB tools and provided solutions to the detected performance and reliability issues.
- Improved software system efficiency by decreasing the average number of steps needed to be taken by the user by 40% to achieve the same functionality.
- Fully automated software systems by minimizing user interactions while allowing the user to modify the automated system's outputs according to their needs.
- Provided automated solutions for distributed systems where each system is deployed in different working environments like Solaris, Windows, and Red Hat.
- Assigned tasks and solved system bugs using Bugzilla according to system analyses, issues observed in deployment, and user feedback.
Technologies: Jenkins, MySQL, Linux RHEL/CentOS, Solaris, Spring Cloud, GitHub, Docker, Hibernate, Spring, Spring MVC, Agile Software Development, Scrum, Java, REST APIs, Jakarta EE (Java EE or J2EE), Back-end Development, TortoiseSVN, Bugzilla, C, MATLAB, Ada, PostgreSQL, Enterprise Architecture, Unix Shell Scripting, Architecture, Back-end, Software Architecture, API Integration, Automation, Technical Writing, Technical Diagrams, B2B, Enterprise SaaS, Minimum Viable Product (MVP), Microservices, Git, CI/CD Pipelines, API Gateways, Microservices Architecture, APIs, Event-driven Programming, Event-driven Architecture, API Development, API Architecture, EventBus, Code Review, Software Development, Distributed Systems, Containerization, Solution Architecture
Configuration Administrator
2012 - 2013
Turkish Naval Research Center Command
- Managed the configuration of software items for multiple deployment platforms, including the same software item with multiple configuration files for each platform or different software items under the same name for each platform type.
- Automated the system to minimize the workload for the deployment process for any given software configuration item.
- Advised and created different technical roles according to the system's needs to further improve the security concerns.
Technologies: Agile Software Development, Scrum, SQL, Databases, Oracle, Java, Enterprise Architecture, Unix Shell Scripting, Back-end, Automation, Technical Writing, Technical Diagrams, B2B, Enterprise SaaS, CI/CD Pipelines, Software Development, Distributed Systems
Weapon Systems Officer
2007 - 2010
Turkish Navy
- Co-jointly maintained multiple teams that have specialized in Weapon Maintenance, system analyses, operators.
- Analysed current system performance using historical data and support optimization and enhancements.
- Oversaw the process of system operations and maintenance while organizing, coordinating, and brainstorming with each team.
Technologies: Aerospace & Defense, Data Mining, Data Analysis
Project History
Staff Engineer for Air Shopping App
https://navan.com/Maintained the 3rd part of the API integration of a flight inventory provider, managed agile streams, reduced backlogs, and prioritized tasks while providing impactful changes by revising architecture, observing and analyzing problems, and removing faulty workflows. This led to double the engagement rate and a 70% increase in stability in the system.
Team Lead of the Alteryx Connect App
https://www.alteryx.com/products/alteryx-connectI maintained and enhanced an on-premise app while supporting customer DB issues without having their original DB. This includes 5+ types of DBs. The app is used by 10,000+ people worldwide while maintaining compatibility with other apps available within the company portfolio. I interacted with stakeholders who are working with other portfolio apps and devised solutions that do not overlap with any other similar app while keeping the uniqueness of their own in place.
Architecture, Development, and Deployment of a Missile System
I designed a brand-new missile control system and integrated a Nato missile using a company-specific distributed system in Java. I developed and deployed the system in the naval forces and executed the first live firings of the system while maintaining its security, stability, and availability.
Outstanding Thesis
While at the Naval Postgraduate School, I developed a thesis around my build of a simulation for finding tracks, target detection, and identification in a multi-agent environment with noise measurements of an unknown number of targets. It won an "Outstanding Thesis Award."
Education
2010 - 2012
Post Graduate Degree in Computer Science (Autonomous System Track)
Naval Postgraduate School - Monterey, California, USA
Certifications
MARCH 2013 - PRESENT
Simulation Development
Atlas Elektronik GmbH (Germany)
FEBRUARY 2013 - PRESENT
Track Management
Atlas Elektronik GmbH (Germany)
Skills
Libraries/APIs
REST APIs, API Development, Java Servlets, jQuery, Liquibase, PostgREST, Apache Lucene
Tools
TortoiseSVN, Notepad++, MATLAB, GitHub, Git, Amazon Simple Queue Service (SQS), Apache Maven, Amazon EKS, Bugzilla, DOORS, Confluence, Jira, Jenkins, Android Studio, Cron, GitLab CI/CD
Languages
Ada, Java, SQL, Hibernate Query Language (HQL), Kotlin, Java 8, Java 11, C, Visual Basic, Python 3, Datalog, HTML, CSS, Java SE (Core Java), JavaScript, Python
Frameworks
Spring, Spring Microservice, Swagger, Mockito, Hibernate, Spring 5, Spring Boot, Spring MVC, PowerMock, Jakarta Server Pages (JSP), Apache Velocity, Robot
Paradigms
Microservices, Defensive Programming, Agile Software Development, Scrum, Unit Testing, REST, B2B, Microservices Architecture, Event-driven Programming, Event-driven Architecture, API Architecture, Automation, DevOps
Platforms
Jakarta EE (Java EE or J2EE), Amazon Web Services (AWS), Eclipse, Docker, Apache Kafka, Google Cloud Platform (GCP), Kubernetes, Amazon EC2, JVM, Oracle, Solaris, Linux RHEL/CentOS, Visual Studio 2016, AWS Lambda, Mobile, New Relic, Unix
Storage
MySQL, PostgreSQL, Databases, JSON, Relational Databases, MongoDB, MariaDB, MSSQLCE, SQLite, NoSQL
Industry Expertise
Project Management
Other
RESTful Microservices, Enterprise Architecture, Back-end Development, Team Leadership, Technical Leadership, Aerospace & Defense, APIs, API Integration, Back-end, Architecture, Software Architecture, Solution Architecture, Enterprise SaaS, Minimum Viable Product (MVP), Startups, Inventory Management, Technical Architecture, CI/CD Pipelines, API Gateways, Separation of Concerns (SoC), IntelliJ SDK, Software Design, Code Review, Software Development, Distributed Systems, Multithreading, UML Diagrams, Unix Shell Scripting, Technical Writing, Technical Diagrams, Leadership, Amazon RDS, Architectural Patterns, SaaS, Cloud Architecture, EventBus, Containerization, Spring Cloud, Eventum, Autonomous Robots, Simultaneous Localization & Mapping (SLAM), Machine Learning, Spring DAO, Java 17, Mailing, OAuth, Travel, Async/Await, Simulations, Data Analysis, Data Mining, Data Aggregation, Scuba Diving, Metadata, Streaming, Distributed Software, Design, Deployment, Messaging, CTO, AWS Cloud Architecture, Payments, High-load
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