Ozren Lapcevic

Ozren Lapcevic Email and Phone Number

Senior Software Engineer @ MEGI Health
Ozren Lapcevic's Location
Croatia, Croatia
Ozren Lapcevic's Contact Details

Ozren Lapcevic work email

Ozren Lapcevic personal email

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About Ozren Lapcevic

Senior software engineer who loves to code and tackle hard problems, from resolving performance bottlenecks and architecting scallable systems, to fixing non-Googleable stacktraces and refactoring critical legacy code.I've worked with web technologies for the last 12 years and have worn many hats during that time: from full stack developer on Groovy/Grails/jQuery stack, backend developer on Node.js/Express stack, devops and startup founder to finding my zen with Python/Django and architecting modern data intensive systems.I have 9+ years of professional experience with Python/Django and it's ecosystem (Celery, DRF, pytest, allauth, requests, huey, etc.), PostgreSQL (raw SQL to the rescue!), and AWS infrastructure.I've worked for wide range of clients, from non-profits and national parks, to startups, scaleups and enterprises.Some examples of the work I've done recently include:1. Scalable architecture for Megi (digital health assistant) using AWS (ELB, EB, RDS, ElastiCache, S3, Route53), Infobip (Answers) and WhatsApp.2. Scalable architecture for monolithic web API based on load balancing (Nginx), multiple web servers, cache (Redis), centralized logging (ELK stack) and CDN (S3 & CloudFront).3. Scalable serverless architecture for web dashboards fully hosted on AWS infrastructure (S3, CloudFront, Route53, Certificate Manager, IAM) and fully provisioning through CloudFormation and Ansible.4. Cassandra database modeling and optimizations for storing and exploring geospatial data.5. Refactoring PostgreSQL to .xlsx exports to support large tables (10+ million rows, 500+ MB .xlsx files).6. Virtual wallet for storing multiple currencies and tracking transactions7. Leveraging Python's multithreading to increase SMTP email throughput and Cassandra data imports8. A lot of APIs design and integration

Ozren Lapcevic's Current Company Details
MEGI Health

Megi Health

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Senior Software Engineer
Ozren Lapcevic Work Experience Details
  • Megi Health
    Chief Technology Officer
    Megi Health May 2022 - Present
    Zagreb, Croatia
    Architecting and developing Megi using custom backend (Django/PostgreSQL), Infobip Answers (chatbot platform) and WhatsApp.Technologies:Django, Python, PostgreSQL, Redis, Huey, AWS (Elastic Beanstalk, RDS, IAM, Certificate Manager, S3, CloudWatch), Infobip Answers (chatbot platform)Skills:architecting and developing new product, APIs development and integration, chatbot implementation, unit and integration testing, database modeling
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  • Bytecode
    Senior Software Engineer
    Bytecode Apr 2018 - Present
    Croatia
    Working as independent contractor for several companies, most recently for Megi (https://www.megi.ai/) and Amodo (https://www.amodo.eu). Technologies:Django, Python, PostgreSQL, Cassandra, Redis, Celery, Huey, AWS (API Gateway, Lambda, DynamoDB, Elastic Beanstalk, RDS, IAM, Certificate Manager, CloudFormation, CloudFront, S3, EC2), Ansible, H3 (Uber’s Hexagonal Hierarchical Spatial Index), Infobip Answers (chatbot product)Skills:architecting new products, APIs development and integration, infrastructure scaling, performance optimizations, unit and integration testing, database modeling
  • Five Minutes
    Senior Web Developer
    Five Minutes Sep 2016 - Apr 2018
    Croatia
    Migration from Parse and implementation of new push notification system based on OneSignal used by all Advance Digital sites. Development of new applications for Erecruit based on serverless AWS architecture. Architecture and estimations for new proposals and pitches.Technologies:Node.js, Javascript, Django, Python, PostgreSQL, AWS (API Gateway, Lambda, Cognito, S3), OneSignalSkills:APIs development, APIs integration, unit and integration testing, database modelling and migrations, push notifications
  • Studio Revolucija
    Web Developer
    Studio Revolucija Dec 2014 - Sep 2016
    Croatia
    Development and deployment of websites, APIs and services for more than 15 clients, including bUnited, City Center One, Ascent Jet, Janssen, Ben Nevis, Lisinski, Adiva, Exedra, Baunet and National park Brijuni.Technologies:Django, Python, PostgreSQL, HTML, AWS, Heroku, Celery, RabbitMQ, Redis, WebSockets, GitSkills:database modeling, integration testing, stress testing, APIs development, APIs integrations, dev ops, social login integrations (Facebook, Google, Twitter, LinkedIn), payment gateway integration (Braintree, Datatrans), push notifications, database migrations, SEO, integrations with various email providers (Mailchimp, Mandrill, SparkPost, SendGrid, Mailgun), multilingual websites, social sharing widgets
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  • Nutristo
    Founder
    Nutristo Sep 2013 - Sep 2016
    Croatia
    Design and development of Nutristo - a web application that helps people who have limited diet to easily find recipes and food products they can safely consume.Technologies/Skills:Grails, Groovy, Spock, HTML, CSS, jQuery, MySQL, Git, Tomcat, AWS, SEO.
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  • Srce
    System Engineer
    Srce Sep 2010 - Nov 2014
    Design and development of http://sip.srce.hr, which includes static and dynamic content, Javascript SIP Client implementation, interface to MySQL database, integration with Kamailio SIP Server, Asterisk PBX and Roger SIP Client and user authentication over Authentication and Authorization Infrastructure (AAI). Design and development of https://eduadresar.srce.hr/. Implementation of digital repository solution for University of Zagreb, various faculties and National and University Library.Technologies used:Grails, Groovy, Spock, Geb, Java, SIP, Kamailio, HTML, CSS, jQuery, MySQL, Linux, LDAP, Shibboleth, Islandora, Fedora Commons, Apache Solr, XPath, Drupal.
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  • Hipersfera D.O.O.
    Telecommunications Engineer
    Hipersfera D.O.O. Oct 2008 - Sep 2010
    Worked on two airship subsystems: communication and payload. Evaluation of existing technologies, subsystem requirements, architecture, design, development (including software engineering), implementation and testing of the subsystems for several airship scale models.Technologies used:802.11n (wireless radio cards, routers, antennas), RouterOS (linux based OS), medium/high end DSLR camera, image stitching software.
  • Faculty Of Electrical Engineering And Computing, Zagreb
    Research Assistant
    Faculty Of Electrical Engineering And Computing, Zagreb Nov 2007 - Aug 2009
    Scientific research, software engineering, mentoring student projects, master's thesis, bachelor's thesis and seminar papers, organizing laboratory exercises, putting together and reviewing exams and homeworks, teaching.Technologies used:Java, C++.
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  • Ericsson Nikola Tesla
    Telecommunication Services Developer
    Ericsson Nikola Tesla Sep 2006 - Jan 2007
    Development of telecommunication services (IMS location services, IMS and sensor networks integration), software engineering, technical documentation/reports.Technologies used:Java, IMS, SIP, Ericsson’s SDS (Service Development Studio), a development tool for IMS applications and services, based on Eclipse.
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Ozren Lapcevic Skills

Java Linux Mysql Telecommunications Web Development Xml Jquery Html Software Engineering Tomcat Sip Css R&d Grails Groovy Twitter Bootstrap

Ozren Lapcevic Education Details

Frequently Asked Questions about Ozren Lapcevic

What company does Ozren Lapcevic work for?

Ozren Lapcevic works for Megi Health

What is Ozren Lapcevic's role at the current company?

Ozren Lapcevic's current role is Senior Software Engineer.

What is Ozren Lapcevic's email address?

Ozren Lapcevic's email address is oz****@****ail.com

What is Ozren Lapcevic's direct phone number?

Ozren Lapcevic's direct phone number is +385 1 553*****

What schools did Ozren Lapcevic attend?

Ozren Lapcevic attended Founder Institute, University Of Zagreb / Sveučilište U Zagrebu.

What are some of Ozren Lapcevic's interests?

Ozren Lapcevic has interest in Traveling, Web Development, Environment, Science And Technology, Music, Squash, Startups, Food, Telecommunication Services, Movies.

What skills is Ozren Lapcevic known for?

Ozren Lapcevic has skills like Java, Linux, Mysql, Telecommunications, Web Development, Xml, Jquery, Html, Software Engineering, Tomcat, Sip, Css.

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