# Patricio Köhler

> Senior Software Engineer at LeapXpert

Location: San Mateo, California, United States
Profile: https://flows.cv/patriciokhler

Patricio is very experienced with development projects in multiple technologies and in analyzing customer needs to construct concrete requirements that exceed expectations. He has a high commitment to getting things done on time without losing quality given his strong foundations in computer science and software engineering with large interpersonal communications experience. During his journey, he has fulfilled different kinds of roles including Software Engineer, DBA, Sys Admin, Architect, Researcher, Security Engineer, QA manager, and candidates interviewer, and also helped develop from scratch a new Detroit-based startup.

Core Competencies:
• Requirements Gathering & Analysis
• Solutions Design & Implementation
• Database Modeling and Tuning
• Infrastructure Dimensioning & Installation
• Risk Analysis
• Problem Solving
• Algorithms
• Team Leadership
• Performance Metrics
• SEO optimization
• Stakeholder Communications
• Virtualization Strategies
• Technology Research & Evaluation
• Training & Mentoring
• Technology Integration
• Support & Services
• QA Automation & Control

## Work Experience
### Senior Software Engineer - Backend @ LeapXpert
Jan 2023 – Present | California, United States

### Software Architect @ The Meet Group
Jan 2017 – Jan 2023 | San Francisco Bay Area
● Designed and implemented multiple micro services in Java and NodeJs (queue consumers and publishers, REST APIs, DB access).
● Migrated all Skout.com services from AWS EC2 to AWS ECS to reduce deployment times and costs.
● Designed and implemented the backend for a 3rd party phone authentication system.
● Increased Skout.com resiliency by improving the downtime due to outages from %1 to ~%0.01 by doing forensics with logging, profiling, and telemetry tools, and implementing solutions.
● Led the optimization and refactoring of a messaging system that receives over 30M messages daily (over $500K in savings a year in DB costs).
● Refactored and optimized the user deletion process in order to comply with privacy regulations (GDPR, CCPA, etc) that allowed catching up with a backlog of 2.5 years to less than a day.
● Maintained the web site for Skout.com (one of The Meet Group networks).
● Engineered the reduction of infrastructure in order to reduce costs by implementing caching layers and tuning the configuration of different services.
● Enhanced and maintained the Skout integration to shared services across all The Meet Group Networks.
● Part of the on-call rotation for Skout and Tagged networks.
● Led technical interviews for senior candidates.
● Technologies and tools: AWS, Eclipse, IntelliJ, PHPStorm, VirtualBox, Mysql, Postgres, Rabbit, Redis, Memcached, DynamoDB, Elasticsearch, Splunk, New Relic, SignalFx, Jenkins, NodeJs, Javascript, Angular, Java, Python, PHP, git/Stash, Docker, PagerDuty.

### Senior Software Engineer - Platform @ if(we)
Jan 2015 – Jan 2017 | San Francisco Bay Area
If(we) Inc. acquired by The Meet Group

●	Contributed to the creation and maintenance of multiple services developed in different technologies.
●	Designed and implemented multiple Hessian Protocol micro services in Java and PHP.
●	Designed and implemented a messaging system for web and mobile clients that handles 20M messages per day.
●	Led the migration of an old messaging system composed of 44TB of data into a new technology.
●	Led and completed multiple security and database inconsistency problems inherited from old acquisitions.
●	Collaborated in the enhancement of the Mongoose XMPP server with additional features (like Push messages, archiving, authentication, etc) required for an internal new shot project.
●	Led the refactoring of all 3rd party authentication services and implemented new ones (including Facebook, Google+, Google Sign In, FB Account Kit, Instagram, etc).
●	Collaborated in the launch of a new real-time video app called WeChill.
●	Technologies and tools: Eclipse, IntelliJ, Vagrant, Virtualbox, Mysql, Oracle, Redis, Memcached, Logstash, Elasticsearch, Kibana, NodeJs, Javascript, Java, Python, PHP, Erlang, git/Stash, AWS, Docker.

### Senior Software Engineer - Social Applications @ Zoosk
Jan 2014 – Jan 2015
Contributed with the creation and maintenance of multiple services developed in different technologies.
● Designed and implemented multiple REST services in different technologies.
● Designed and implemented queue communications systems based on publishers and workers under different platforms.
● Refactored and maintained old services based on new requirements or business logic changes.
● Designed and maintained Mysql and Cassandra databases including automated procedures for DB migrations.
● Implemented a python service used to read from the Journald logging system and forward the data to a centralized Elasticsearch.
● Designed and implemented a multi-threaded photo transcoder (using ImageMagick library) in order to optimize the throughput. 
● Integrated the Facebook API into an internal service with customized functions.
● Designed and implemented the automated unit testing of the different services.
● Contributed and maintained a monitoring system based on riemann.io
● Technologies and tools: Eclipse, PhpStorm, IntelliJ, Vagrant, Virtualbox, Mysql, Cassandra, Journald, Elasticsearch, Kibana, RabbitMQ, NSQ, Eureka, NodeJs, Javascript, Java, Gradle, JNI, Python, PHP, git, Fedora, AWS, Riemann.io.

### System Architect, Tech Leader, Senior Software Engineer, DBA @ Stik.com
Jan 2009 – Jan 2014 | Buenos Aires (Argentina), Detroit (USA)
Created Stik.com from scratch as a founding member by defining technologies, and by developing features as needed. 
●	Defined, installed, configured, and maintained the AWS-EC2-based Infrastructure, composed of up to 15 servers of different sizes and configurations.
●	Coordinated with third party consultants on the implementation of new/different technologies.
●	Implemented and optimized a social search engine based on Sphinx, Mysql, and algorithms with working datasets of over 1.5B records. 
●	Tuned the database and storage media to enable load processing without service degradation. 
●	Integrated different APIs (Facebook, Linkedin, Twitter, Google, SalesForce, etc.) for authentication, synchronization, and personal data retrieval purposes, reaching ~180M users.
●	Researched and evaluated different storage and indexing solutions; ultimately selected Sphinx for text indexing, Percona DB for relational data & write intensive transactions, and Redis for web session management.
●	Collaborated on SEO optimization, reaching 2M indexed pages, 32K impressions, and 2.5K clicks per day.
●	Led the initial development team while creating development processes, and while defining best practices, templates, and operating procedures to optimize IT project development.
●	Developed metrics to test and monitor, ensuring steady improvement and detecting bottlenecks.  
●	Implemented tools for the customer retention solutions team.
●	Technologies and tools: Eclipse, PHP (Zend, Doctrine, etc), Javascript (jquery, mootools, backbone, etc.), C++, MySQL/Percona, Sphinx, Ubuntu, AWS (EC2, EBS, Load Balancers, etc), Selenium, Python (Django).

### Independent Consultant @ International Trade Centre
Jan 2009 – Jan 2010 | Buenos Aires (Argentina)
Gave technology advice and developed software.
● Implemented the full stack of a web page for internal usage.
● Helped with the maintenance and support of the web page.
● Technologies: LAMP + AJAX.

### Independent Consultant @ The Writing Center
Jan 2007 – Jan 2009 | Buenos Aires (Argentina)
Implemented from scratch a profitable online editing business that is still online with almost no maintenance.
●	Modeled the database and implemented all layers of the project.
●	Estimated the required effort and time for bugs and new features implementation.
●	Integrated the website with Google Checkout and Paypal.
●	Technologies and tools: ASP.NET2, C# and SQL-server2005, Visual Studio 2005.

### Technical Project Leader, System Designer, Functional Analyst @ Kapsch
Jan 2008 – Jan 2009 | Buenos Aires (Argentina), Vienna (Austria), Klagenfurt (Austria)
Designed solutions for tolling systems and city/highway vehicle control around the world.
●	Designed the ERP and Web page architecture of large tolling systems in Australia, New Zealand, Austria, Czech Republic, Italy, and Switzerland.
●	Traveled to meet with customers, and to gather and define requirements.
●	Negotiated the scope of the features directly with customers.
●	Designed solutions for integration with 3rd party systems (billing, enforcement, printing, etc.)
●	Created and reviewed technical documentation for the R&D department and customers.
●	Estimated the necessary development and QA effort for the projects, and for required new features and bug resolution requests.
●	Supervised the technical solutions provided by R&D.
●	Technologies and tools: Delphi, ASP.NET, C#, Javascript, SQL-Server, ISO9001 and CMMI3 standards, Internal Tools.

### Senior QA Software Engineer (Contractor) @ Google
Jan 2007 – Jan 2008 | Buenos Aires (Argentina), New York (USA), Mountain View (USA)
Worked in two different projects related to QA automation
●	Designed functional Test Cases Suit, tracked test, and documented results using Buganizer, Lemon, and Spreadsheets.
●	Automated test harness with TAU (internal library) and Selenium for complete code coverage programming in HTML, XML, Java, and C++ under Windows XP and Linux (gubuntu).
●	Automated verification of robustness and security using relevant internal tools.
●	Analyzed and researched in pursuit of new functionality and extensions.
●	Engaged in algorithms research for pattern matching.
●	Technologies and tools: HTML, Javascript, XML, C++, Java, Selenium Suite, and internal tools.

### Senior Software Engineer @ Globant
Jan 2007 – Jan 2008 | Buenos Aires (Argentina)
Senior Consultant for Google projects in New York City and Mountain View, CA .

### Project Leader, Senior Software Engineer @ The InPractice Group
Jan 2006 – Jan 2007 | Buenos Aires (Argentina), Washington DC (USA)
Implemented and maintained a customizable online workflow/BI product for this small business.
●	Refactored the product into good development best practices. 
●	Designed a new database architecture for customers with large amounts of data.
●	Developed and maintained new functionalities in accordance with customer requests. 
●	Improved performance in all layers by tuning the database and rewriting key algorithms.
●	Created from scratch a KPI Engine for business intelligence applications that translated handwritten formulas into visualized KPI graphs.
●	Led a three-member team.  
●	Technologies and tools: MS Visual C++, DHTML, Javascript, SQL-Server, and IIS.

### Software Engineer, ISO 9001 Internal Auditor @ Condor Technologies
Jan 2005 – Jan 2006 | Buenos Aires (Argentina)
Developed and maintained VoIp solutions for small telecommunications companies around the world.
●	Designed VoIP systems based on the SIP protocol under Linux/Unix platforms.
●	Improved performance of the RTP module by 5x, supporting 3x-5x more clients per server.
●	Devised Web solutions for service configuration and for integration with 3rd party systems.
●	Designed and implemented features for real-time & concurrent requirements.
●	Mentored a group of three interns.
●	Technologies and tools: C++, gcc, gdb, PHP, MySQL, ORACLE, and Apache.

### System Architect, Functional Analyst, Project Leader, Senior Developer @ LoJack
Jan 2003 – Jan 2005 | Buenos Aires (Argentina)
Developed a new vehicle tracking system and a new ERP, both from scratch.
●	Gathered, analyzed, and negotiated scope of business requirements.
●	Spearheaded, developed, and deployed an ERP/CRM solution, designed in multiple layers oriented to load balancing (an innovation at the time, when nearly everything was client-server)
●	Devised and implemented a vehicle tracking system that located vehicles in under five minutes, compared to the 30-60 minutes of the previous version. 
●	Integrated the software with proprietary hardware interfaces and protocols.
●	Led two teams (one per project) simultaneously, with a total of six members.
●	Technologies and tools: Kylix3, Delphi, Postgres, SQL-Server, and ISO9001.

### Senior Developer @ RIMA
Jan 2000 – Jan 2003 | Buenos Aires (Argentina)
Developed and maintained e-learning solutions and medical databases.
●	Designed and implemented a Text-Search engine for medical abstracts based on logical word-formulas (at the time, there were no off-the-shelf solutions). This enabled the development of subsequent products based on search patterns.
●	Created an offline database mirroring based on FTP between Madrid, Mexico DF, and Buenos Aires.
●	Developed and monitored an E-Learning software product for medical students.
●	Technologies and tools: ASP, Javascript, Visual Basic, MS Visual C++, Delphi, COM+, and SQL-Server


## Education
### Bachelor of Science (BSc) in Computer Sciences
University of Buenos Aires

### Bachiller in Maths & Physics orientation
Ballester Schule

### Goethe Schule


## Contact & Social
- LinkedIn: https://linkedin.com/in/patriciokohler
- Website: http://www.stik.com

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Source: https://flows.cv/patriciokhler
JSON Resume: https://flows.cv/patriciokhler/resume.json
Last updated: 2026-04-01