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Jarek Lipski, Progressive Web Applications (PWA) Developer in Paris, France
Jarek Lipski

Progressive Web Applications (PWA) Developer in Paris, France

Member since March 14, 2018
Jarek is a full-stack developer with more than ten years of experience. He is currently working with Vue.js and Python and specializes in progressive web apps.
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Portfolio

Experience

Location

Paris, France

Availability

Part-time

Preferred Environment

Vue.js, Python, AWS, Docker, Firebase, PostgreSQL

The most amazing...

...project I've made is a bilingual sentence aligner. Splitting uses pairs of regexes on a text stream; alignment uses length-based and content-based algorithms.

Employment

  • Front-end developer

    2019 - PRESENT
    Bolt Threads
    • Developed heavily customized eCommerce solution in distributed team.
    Technologies: VueJS, Nuxt, SSR, Tailwind

  • Senior Application Developer

    2018 - 2018
    Jahia
    • Developed personalization and A/B testing solution for enterprise CMS.
    Technologies: Java, AngularJS, Elasticsearch, Git, Jahia, Apache Unomi

  • Tech Lead

    2018 - 2018
    Netseenergy/EDF Group
    • Worked on a micro-service migration project for a company in energy efficiency for business and institutional clients sector.
    Technologies: Java, AngularJS, Oracle, Talend, Git, GitLab

  • Developer

    2018 - 2018
    Artset
    • Developed an application for art galleries (back-end, webapp, mobile app).
    • Developed a specialized billing module for art galleries.
    • Configured and ran a cloud infrastructure on AWS.
    • Developed CRM module (artist biography, sending catalogues to clients, export).
    Technologies: Django, Ionic, Angular, AWS, Docker, Git

  • Consultant Software Developer

    2017 - 2018
    GS1 / Xebia France
    • Developed web-based product barcode management solution.
    • Developed various back-end systems and APIs (NodeJS, Java, Python) and front-end interface (Angular 2).
    • Managed cloud infrastructure (AWS EBS, EC2, DynamoDB, Lambda, S3, CloudFront, Route53).
    • Developed efficient Global Trade Item Number (GTIN) generation algorithm (NodeJS, ElasticSearch).
    • Presented an introductory talk about Kanban during internal company conference.
    Technologies: NodeJS, Python, Java, Angular 2, ElasticSearch, AWS, EBS, EC2, DynamoDB, Lambda, Git

  • Scrum Master / Software Developer

    2015 - 2017
    Ullink
    • Developed a middle office solution which allows the management of trade allocations, confirmations, and fees for stock market brokerage firms.
    • Worked as a part-time Scrum Master, facilitating work of a team and helping to improve its development process (focus on functional user stories, reducing WIP, expanding DoD, promoting frequent releases, initiating R&D collaboration with customer support, ops and sales, organizing workshops, promoting lean and agile within the organization).
    • Developed client-server application, used by big financial institutions (Java, C#, OSGi, IKVM, AssertJ, XML, Gradle).
    • Won Ship-It Day team contest, developing FIX-based post-trade matching solution in 24h. Co-organized Ultimate Bug Fighting Championship.
    • Interviewed candidates for Scrum Master and back-end developer roles.
    • Promoted Linux in the company by creating and adapting tools, organizing meetups and maintaining chat channel.
    Technologies: Java, C#, OSGi, IKVM, AssertJ, XML, Gradle, Git, FIX protocol

  • Software Developer

    2011 - 2015
    Viadeo
    • Developed back-end services for API, platform, and mobile teams in a professional social network company with over 50 million worldwide users.
    • Worked with Scrum and Kanban agile development processes and participated in their refinement in a cross-functional team, complete with front- and back-end developers, operations, product, and marketing.
    • Developed a public RESTful API which handles up to 1 million requests per hour.
    • Participated in the development of a brand new service platform under the direct supervision of the architecture team (CQRS, DDD).
    • Implemented a search company into user network functionality (ElasticSearch, Java, Guava, Spring, Cucumber) and address book synchronization, search members by phone number and job offer suggestions services for mobile devices (ElasticSearch, Java, Guava, Spring, Cucumber).
    • Helped to organize the Viadeo API London Hackday.
    • Temporarily managed the team during the project manager's absence. Responsibilities included planning to meet internal project deadlines, dealing with customer requests and facilitating inter-team collaboration.
    Technologies: Java, Guava, Spring, AspectJ, FitNesse, Cucumber, MySQL, ElasticSearch, Solr, OAuth, JSON / XML, Tomcat, Git, CQRS, DDD

  • Software Engineer

    2009 - 2011
    Wood Group Intetech
    • Developed Intetech Well Integrity Toolkit (iWIT) web application for the oil and gas industry in a team of 11 programmers.
    • Redesigned the data source abstraction layer communicating with Oracle, MS SQL Server, web services, PI, and IP2 DBs.
    • Implemented well structure recognition algorithm, reports, and data entry pages.
    • Developed and troubleshot a web service for synchronizing data with a large customer system (JAXWS, JAXB, XML Schema).
    • Introduced Log4J logging framework into the application; configured, wrote extensions, documented and trained others on how to use it, created RSS feed from the application log for testers.
    • Updated the database structure, implemented stored procedures and triggers (Oracle, SQL, PL/SQL).
    • Remotely deployed, configured, troubleshot and profiled iWIT web application on customer test and production virtual servers.
    Technologies: Java, SQL, JSP, Struts, JUnit, Log4J, Oracle, SQL, PL/SQL, XHTML, CSS, Javascript, JAXWS, JAXB, XML Schema, IBM Synergy

  • Software Developer

    2007 - 2008
    CST Technobank
    • Maintained the web framework which provided fundamental functionality to all the company's products for financial institutions.
    • Implemented various framework modules including authorization and authentication, file repository, and tracking.
    • Supervised two student interns developing SSO module.
    • Created user interface widgets, for example, file explorer, panel, and tree that support all major web browsers.
    • Redesigned and reimplemented various components including a controller with centralised input validation and error handling, business logic and internationalization.
    Technologies: Java, Spring, TestNG, Hibernate, SQL, JSP, Stripes, XHTML, CSS, Javascript, Prototype, SVN

  • Software Developer

    2006 - 2007
    POLENG
    • Co-created a translation memory management web application in a small team within a company specializing in rule-based machine translation.
    • Designed and implemented a bilingual text alignment algorithm (subject of my Master's Thesis) and a rule-based sentence splitting algorithm (rules stored using SRX standard).
    • Created a user interface, controller, data access layer, and installation scripts.
    • Implemented a translator web service.
    Technologies: Java, Servlets, JDBC, PostgreSQL, WSDL, SOAP, JAX-WS, JSP, XHTML, CSS, Ant, Bash, .BAT, SVN

  • Demonstrator

    2005 - 2006
    Adam Mickiewicz University
    • Worked as a teaching assistant and provided help and support to younger students during practical classes.
    Technologies: Java, C++

  • Intern

    2004 - 2004
    Accenture
    • Helped to organize the work environment for developers on a project at a customer's site.
    Technologies: Oracle database, Oracle IAS, Suse Linux, Solaris

Experience

  • Sojourner Web (Development)
    https://github.com/loomchild/sojourner-web

    Free and Open source Software Developers' European Meeting (FOSDEM) conference companion progressive web app (PWA). Able to store favorite talks in persistent device storage.

    Live verstion: https://sojourner.loomchild.net/

    Written in VueJS using VueX, material design.

  • Puffin (Development)
    https://github.com/puffinrocks/puffin

    Lightweight webapp catalog based on containers, with user interface à la mobile app store.

    The goal of the project is to allow average, tech-oriented user to run web applications without worrying about a server. The idea is to create an easy to host, technology agnostic private cloud.

    While many other tools are looking at containers as a way to run massive applications, Puffin concentrates on lightweight ones, each serving just a handful of people.

    Written using Docker, Python, and Flask.

    Live demo: http://puffin.rocks

  • volume-backup (Development)
    https://github.com/loomchild/volume-backup

    An relatively popular utility to backup and restore docker volumes.

    Written using Docker and Bash.

  • Reload (Development)
    https://github.com/loomchild/reload

    This utility starts given program and reloads it whenever any file in current directory changes. Can be used as both Python library and standalone executable independent of programming language.

    Written in Python using Watchdog library.

  • Segment (Development)
    https://github.com/loomchild/segment

    Tool to split text into segments, for example sentences. Splitting rules are read from SRX config file, which is based on regular expressions.

    The tool is optimized for performance, both in terms of processing power and memory consumption (it allows streaming processing). It has been used in commercial, open-source (LanguageTool) and scientific applications to process large text corpuses, such as Wikipedia archive.

    Written in Java.

    I have also co-written a scientific paper based on this tool: https://loomchild.net/files/2013/12/Using_SRX_standard_for_sentence_segmentation_in_LanguageTool.pdf

  • Maligna (Development)
    https://github.com/loomchild/maligna

    mALIGNa is a program for aligning documents on the sentence level. It contains implementations of a few groups of alignment algorithms - algorithms based exclusively on the sentence length (Gale and Church, Brown), algorithms based on the connections between words (Moore's algorithm), as well as any variation and intersection of these algorithms. The aim of alignment is to obtain a bilingual corpus. It can be used for creating translation memories, translation by analogy, modelling probabilistic dictionaries and other applications.

    Written in Java. Hosted on Maven central, used in commercial and scientific applications.

    I have co-authored a scientific paper based on this tool: https://loomchild.net/files/2013/12/A_new_tool_for_the_bilingual_text_aligning_at_the_sentence_level.pdf

Skills

  • Languages

    Python, SQL, Java, JavaScript, Regex, Bash, CSS, HTML

  • Frameworks

    Flask, Django, Nuxt.js, Selenium, Express.js, Nose

  • Libraries/APIs

    Vue.js, Vuex, Node.js, Google Apps, SQLAlchemy, RxJS

  • Tools

    Git, Vim Text Editor, Amazon CloudFront CDN, Slack, Kibana, Jenkins, Trello, Atlassian Confluence, Jira, Auth0, CircleCI, Travis CI, AWS CloudWatch, AWS EBS

  • Paradigms

    Agile, Kanban, Scrum, Test-driven Development (TDD), DevOps

  • Platforms

    Docker, Amazon Web Services (AWS), Debian Linux, Ubuntu Linux, AWS Lambda, Oracle, AWS EC2, Firebase

  • Other

    Scrum Master, Progressive Web Applications (PWA), Serverless

  • Storage

    Elasticsearch, PostgreSQL, AWS DynamoDB, MySQL, NoSQL, AWS S3

Education

  • Master's degree in Computer Science
    2002 - 2007
    Adam Mickiewicz University - Pozna, Poland
  • Exchange Student / Socrates-Erasmus Programme in Computer Science
    2004 - 2005
    Heinrich Heine University - Duesseldorf, Germany

Certifications

  • Certified Scrum Master
    NOVEMBER 2013 - PRESENT
    Scrum Alliance
  • Java Programmer (SCJP 6.0) Certificate
    JUNE 2010 - PRESENT
    Sun / Oracle

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