Volodymyr Kushnir

Experience

Now

• 1^st October 2020 – present

  Full Stack Developer at Decentriq

  • build, test, and deploy an application written with React + Apollo Client
  • make the app beautiful, themable (using Joy UI and Font Awesome), and reactive (using GraphQL subscriptions over Websockets API)
  • create components in Storybook, own the design system, handle UI framework migrations (e.g. from Material UI to Joy UI), maintain a theme built with CSS Variables on top of slot-based components
  • build and validate forms (using react-hook-form and zod/yup), including dynamic ones generated at runtime from JSON Schema (using JSON Forms)
  • build the charts dashboard using recharts, reaching for @vx primitives where recharts falls short
  • build a rule-editing interface using react-querybuilder
  • build CSV import/export flows (using papaparse) and zip-based file export/download flows (using jszip and file-saver)
  • integrate WebAssembly modules into the app (e.g. for client-side attestation verification, for validating and transforming data during upload, etc.)
  • integrate with third parties (e.g. Auth0 for authentication, etc.)
  • maintain the monorepo and its build pipeline (using pnpm workspaces and Vite)
  • own and maintain the shared package ecosystem across the monorepo (components, hooks, theme, utils, models, API, and GraphQL packages), including a custom ESLint config
  • keep dependencies up-to-date, code clean, linted, and prettified (also solid, dried, and kissed)
  • write and maintain unit, integration, and end-to-end tests (using Vitest, React Testing Library, and Playwright), mock APIs with MSW, and own the testing infrastructure and configuration

Back then

• 1^st January 2020 – 28^th February 2022

  Full Stack Developer at Hivecell

  • built, tested, and deployed an application written with React + Apollo Client and Node.js + Express + Postgraphile + PostgreSQL
    @apollo/client @auth0/auth0-react @dnd-kit/core @dnd-kit/modifiers @dnd-kit/sortable @dnd-kit/utilities @emotion/babel-plugin @emotion/css @emotion/react @emotion/styled @fortawesome/fontawesome-svg-core @fortawesome/free-brands-svg-icons @fortawesome/free-regular-svg-icons @fortawesome/free-solid-svg-icons @fortawesome/pro-duotone-svg-icons @fortawesome/pro-light-svg-icons @fortawesome/pro-regular-svg-icons @fortawesome/pro-solid-svg-icons @fortawesome/pro-thin-svg-icons @fortawesome/react-fontawesome @mui/lab @mui/material @optimizely/react-sdk @sentry/react @sentry/tracing ahooks apollo-upload-client apollo3-cache-persist date-fns file-saver framer-motion graphql graphql-ws history lodash mapbox-gl notistack react react-awesome-query-builder react-dom react-hook-form react-is react-map-gl react-router-dom react-virtuoso slate slate-history slate-react uuid web-vitals workbox-background-sync workbox-broadcast-update workbox-cacheable-response workbox-core workbox-expiration workbox-google-analytics workbox-navigation-preload workbox-precaching workbox-range-requests workbox-routing workbox-strategies workbox-streams xterm xterm-addon-attach xterm-addon-fit xterm-addon-unicode11 xterm-addon-web-links
  • kept dependencies up-to-date, code clean, linted, and prettified (also solid, dried, and kissed) using latest tooling available
    @graphql-codegen/cli @graphql-codegen/import-types-preset @graphql-codegen/typed-document-node @graphql-codegen/typescript @graphql-codegen/typescript-apollo-client-helpers @graphql-codegen/typescript-operations @graphql-codegen/typescript-react-apollo @vitejs/plugin-react eslint eslint-config-prettier eslint-config-react-app eslint-plugin-import eslint-plugin-prettier eslint-plugin-simple-import-sort eslint-plugin-sort-keys-fix husky lint-staged prettier source-map-explorer typescript vite vite-plugin-eslint vite-plugin-svgr
  • made the app beautiful, themable (using Material UI and Font Awesome), and reactive (using GraphQL subscriptions over Websockets API)
  • integrated with third parties (e.g. Auth0 for authentication, Optimizely Rollouts for feature flags, Mapbox for maps, Sentry for error tracking, etc.)
  • kept the code coverage threshold for unit tests at a reasonable minimum (it's 0% so far)
  • optimized the code for performance and efficiency (used Service Workers API, Web Workers API, and techniques like memoization, throttle and debounce to solve caching, overfetching/underfetching, exceeding rate limits, unnecessary re-rendering, browser freezing issues, etc.)
  • kept the backend robust and steady (using axios-retry to retry calls, winston for logging, and lightship to report readiness and liveness, etc.)
  • maintained the database (using Flyway for migrations, Row Level Security for security and multitenancy, etc.)
  • wrapped the whole machinery into Docker containers and deployed to Kubernetes as part of the microservice-based event-driven CQRS architecture, checked CI/CD pipelines for speed, reliability, and consistency
  • communicated with other microservices using Kafka, REST APIs, GraphQL schema stitching
  • tried and maintained a proper attitude, being soft yet reasonable and persuasive, set realistic deadlines and goals and helped the team to meet those, led by example

• 15^th July 2019 – 31^st December 2019

  Full Stack Developer at Newfire Partners

  1. Full Stack Developer at PrismHR

     • did code reviews, attended refinement meetings, daily standups, sprint plannings and retrospectives (it's a large enterprise, so Scrum and QA comes first)
     • designed, built, deployed and maintained PrismHR Security Center module (written with Node.js, React, GraphQL, and PostgreSQL)
       create-react-app react typescript react-table react-intl yup node-sass prettier formik graphql hookrouter aws-amplify apollo-boost @apollo/react-hooks enzyme joi sequelize winston pg lodash chai sinon
     • identified and solved bottlenecks and bugs, found patterns in the existing codebase and refactored everything, again (no joke, this one was my all-time favourite ❤️)

• 24^th January 2017 – 4^th July 2019

  Full Stack Developer at Binary Studio
  ^{By the way, here's my introduction letter}

  1. Full Stack Developer at ScreenCloud

     • built, tested, and deployed to Amazon Web Services applications written with Node.js, React, GraphQL, and PostgreSQL
       apollo-client formik graphql graphql-tag slate uppy yup storybook puppeteer debug dotenv express joi morgan passport pg request postgraphile chai mocha standard snazzy
     • configured caching on CloudFront and Elasticache, WebSockets on Elastic Beanstalk, set up API Gateways and Lambdas, etc.
     • did code reviews, took care of documentation, planned sprints, participated in retrospectives and daily standups

  2. Frontend Developer at Dynamic Reservations

     • built, tested, and deployed a React/Redux-based frontend
       create-react-app axios classnames lodash moment normalizr query-string react react-intl react-redux react-router redux redux-form redux-logger redux-saga redux-thunk semantic-ui-react node-sass prettier codeceptjs nightmare
  • Also did some other things from time to time 🎉
    • occasionally I gave lectures at Binary Studio Academy
    • sometimes I was being mentored by those whom I mentored 🤷🏼‍♂️
    • I was good at kitchen talks about pretty much anything
    • I played video games with them so that we became a better team (debatable)

• 1^st October 2016 – 31^st December 2016

  Full Stack Developer at Dutchstar

  • built, tested, and deployed applications written with React + Redux and Phalcon + MySQL

• 10^th September 2016

  Relocated to Lviv
  

Way back then

• Some time in 2015

  Quit smoking 🥗

  • still love to eat junk food sometimes and have a drink occasionally

• 25^th May 2014 – forever

  Married Lyudmyla Mandzyuk 👩🏻

  • doing what I'm told

• 1^st September 2012 – 30^th September 2016

  • Service Center Databases Lead at Sumitomo Electric Bordnetze Ukraine
    • managed MySQL multi-master clusters, Oracle failover clusters, Microsoft SQL mirrored/replicated servers (monitoring, backup/restore, users/groups/roles, schemas)
    • built and benchmarked fast, efficient SQL queries
    • optimized database engines, indexes, etc.
    • crafted web dashboards, reports using HTML, CSS, JavaScript, SQL

• 1^st September 2011 – 30^th September 2016

  • IT Production Subdivision Manager at Sumitomo Electric Bordnetze Ukraine
    • designed computer-aided manufacturing processes
    • interconnected different production systems’ databases (push or pull data using replication, triggers, scheduled events, cron jobs)
    • built high-availability systems, minimized downtime
    • designed and built BDE (BetriebsDatenErfassung) — data aggregator system designed to assist in planning, manufacturing, monitoring, and controlling
    • analyzed and transformed data
    • wrote docs, manuals, guidelines, and memos

• 9^th April 2008

  Was officially hired (employee #943) by Sumitomo Electric Bordnetze Ukraine
  ^{Worked as a contractor previously}

• 14^th February 2008 – 31^st January 2011

  • Software Engineer at Sumitomo Electric Bordnetze Ukraine
    • designed UI and UX for native applications and web pages
    • built simple apps to assist in manufacturing process using Delphi, VB, Java, HTML, CSS, JavaScript, PHP, SQL
    • managed Microsoft SQL, MySQL, and Firebird databases

• February 2006 – August 2007

  • Graphic Designer at Terminal
    • designed booklets, flyers, business cards, posters using Adobe CS (Photoshop, Illustrator, InDesign)
    • managed inkjet plotters and printers
    • built websites using Macromedia Dreamweaver, Macromedia Flash (ActionScript)
    • started smoking 🚬

• April 2004 – December 2004

  • System Administrator at Pyramid
    • managed a network of dozen Windows workstations and one Linux gateway (DHCP, DNS, proxy, ACLs)
    • kept PCs health (install OS over PXE, backup/restore, antivirus, software updates, hardware upgrades etc.)

• 16^th May 2003

  Got my internal passport (with a traditionally awkward photo, of course) — can't wait to replace it with a new Passport of the Citizen of Ukraine

• couldn't do much really for the first few years...

• 6^th October 1986

  Born in Ternopil, Ukraine
  ^{— Thanks, mom and dad!}