Sorin Florea, Software Developer in Timișoara, Romania
Sorin Florea

Software Developer in Timișoara, Romania

Member since July 21, 2018
Sorin is a developer with over four years of experience who has worked for large corporations and startups. He's experienced in all phases of the software development life cycle from design to implementation. He is passionate about tackling complex tasks and is also interested in machine learning and Blockchain. Sorin specializes in the JVM ecosystem but he is ready to learn and use anything that is available to deliver results.
Sorin is now available for hire




Timișoara, Romania



Preferred Environment

ITerm, IntelliJ, Git

The most amazing...

...problem I've tackled was optimizing a big data MapReduce job that matched over 80 million incomplete bookings with payments.


  • Freelance Senior Software Engineer

    2018 - PRESENT
    Clients (via Toptal)
    • Reverse-engineered a game engine.
    • Synchronized events between game clients via Firebase.
    • Altered the game client to behave in a different way.
    Technologies: Firebase, Java
  • Senior Sofrware Engineer

    2019 - 2019
    Learn 2 Forecast
    • Developed pipelines for deploying and running spark jobs on Google Cloud Dataproc.
    • Developed PySpark jobs to ingest Thompson Reuters news and analyze them.
    • Moved machine learning jobs from single-core to Spark to improve performance.
    Technologies: Google Cloud, Python, PySpark
  • Lead Developer

    2018 - 2018
    • Developed an Angular dashboard used for displaying various charts, sentiment analysis, and streamer engagement.
    • Used Spring Boot to create the back-end for the dashboard.
    • Created a job that pulls twitch videos, extracts audio, performs speech to text and cloud natural-language processing (NLP) to extract a sentiment analysis.
    • Deployed the dashboard, the back end, and various data processing jobs to Google Cloud.
    Technologies: Google Cloud Natural Language, Google Cloud, Angular, PostgreSQL, Spring, Java
  • Developer (Contractor)

    2018 - 2018
    • Implemented a distributed data ingestion in a microservices environment using Java, AWS SQS, Jetty, and JAX-RS.
    • Wrote integration tests using Scala and the Gatling framework.
    • Developed a Docker container management tool that provided the capabilities to spin up any microservice and all its dependent microservices locally to allow for integration testing.
    • Created load tests to ensure that the distributed system is capable of supporting the desired load.
    • Worked in a distributed team spanning multiple timezones and managed to achieve all the target deadlines.
    Technologies: Amazon Web Services (AWS), Docker, Microservices, Eureka, Elasticsearch, MySQL, Cassandra, Scala, Java
  • Senior Software Developer

    2017 - 2018
    • Developed a REST API for searching politically exposed entities for the banking industry using the Spring framework and the Oracle database.
    • Created a distributed, multi-node Spring Batch project to achieve a high data import throughput.
    • Constructed a Jira plugin using the Spring framework.
    • Developed a REST API for asset management for a large bank from Europe used to provision the internal resources.
    • Worked on securing REST APIs used by banks.
    Technologies: Jira, Oracle Database, Spring
  • Software Engineer

    2015 - 2017
    • Developed a sports betting-and-data aggregation API for suggesting the safest bets as suggested by previous statistical data and human experts; used the Spring framework.
    • Used multiple sports data providers for aggregating statistical data and matching it to real-time Betfair bet markets using Spring, RabbitMQ, and Spring Batch.
    • Designed and implemented a file format detector and parser for a data-loading application supporting over 30 different types of files and automatically detecting their format, parsing them, and then loading them into HBase using MapReduce.
    • Optimized a deduplication MapReduce job that was taking over 24 hours to run; solved this by migrating the job to Apache Spark and improving the algorithm. It ultimately achieved an app speed improvement of six-fold.
    • Properly tested all the implemented jobs using unit tests and a local in-memory HBase cluster.
    • Developed a fully stateless authentication system using JWT and the Spring framework.
    • Built an internal Slack bot for submitting time off requests through Slack.
    Technologies: Apache ZooKeeper, Apache Pig, Docker, Liquibase, RabbitMQ, Apache Kafka, Spring, HBase, MySQL, MapReduce, Hadoop, Elasticsearch, Apache Spark, Java
  • Junior Software Engineer

    2014 - 2015
    • Worked on a generation solution for landing pages; it was based on popular travel destinations it outputs XML with all the content that should be rendered to the user for that specific page.
    • Built an XML-to-HTML page builder engine that loads the XML (outputted by the algorithm) and serves it to the end user.
    • Developed a page-linking algorithm to improve the SEO based on Google search popularity and adjustable metrics to improve traffic and conversion rate.
    • Built custom plugins for the Orchard CMS using ASP.NET MVC for content creators.
    Technologies: JavaScript, ASP.NET MVC, Microsoft SQL Server, C#
  • Intern

    2013 - 2013
    • Learned about the inner workings of malicious software and how to protect against it.
    • Worked with the inner workings of windows operating system like memory management and security model.
    • Implemented various algorithms in Assembly.
    Technologies: C++, C, Assembly


  • Betflow (Development)

    A sports betting-and-data aggregation API used for placing well-informed bets.


  • Languages

    Java, Java 8, JavaScript, Assembly, C, C++, C#, Scala, Python, Python 3
  • Frameworks

    Spring, Hibernate, Spark, Angular, Hadoop, ASP.NET MVC, Apache Spark
  • Libraries/APIs

    REST APIs, Liquibase, PySpark
  • Other

    Freelance Developer, API Design, Google Cloud Natural Language
  • Paradigms

    Microservices Architecture, Agile Software Development, MapReduce, Microservices
  • Platforms

    Docker, Apache Pig, Linux, Oracle Database, Amazon Web Services (AWS), Firebase, Apache Kafka
  • Storage

    Spring Data, HBase, Cassandra, MySQL, PostgreSQL, Google Cloud, Microsoft SQL Server, Elasticsearch
  • Tools

    Git, IntelliJ, ITerm, RabbitMQ, Jira, Eureka, Apache ZooKeeper, Gatling, Amazon Elastic MapReduce (EMR)


  • Bachelor's degree in Automation and Computer Science
    2011 - 2015
    Technical University of Cluj Napoca - Cluj-Napoca, Romania


  • Machine Learning
    APRIL 2017 - PRESENT
    Stanford University via Coursera

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