Leonid Beschastny
Back End Developer at Viaplay Group
Stockholm, Sweden
Summary
👤
Senior🎓
Top SchoolLeonid Beschastny is a back-end developer and technical lead with 13 years of experience designing and shipping high-load microservice APIs, currently driving backend work at Viaplay Group from Stockholm. He has deep Node.js expertise since 2011, complemented by multi-year Clojure experience and hands-on work with MongoDB, Postgres, Redis, Kafka, ClickHouse and Kubernetes/Helm. Leonid has led architecture decisions, technology selection, and mentoring while owning critical code paths for payment and parking systems, and he also brings DevOps fluency and a research background in data analysis from PhD work. An active open-source maintainer, he contributed notable reliability and Promises/A+ compliance improvements to the widely used Automattic/monk MongoDB library. Outside of work he blends analytical interests with creative pursuits—fiction, strategy games and HEMA fencing—which mirrors his pragmatic yet curious engineering approach.
13 years of coding experience
11 years of employment as a software developer
Specialist, Mathematics and Computer Science, Specialist, Mathematics and Computer Science at National Research Nuclear University (former Moscow Engineering Physics Institute)Doctor of Philosophy (PhD), ABD (All But Dissertation), Data Analysis, Doctor of Philosophy (PhD), ABD (All But Dissertation), Data Analysis at National Research Nuclear University MEPhI (Moscow Engineering Physics Institute)
Russian, English, Swedish
Stackoverflow
50,944reputation
5.1mreached
432answers
5questions
http-post
top-5%
if-statement
top-5%
mongoose
top-1%
async-await
top-5%
javascript
top-1%
clojure
top-1%
Github Skills (35)
unit-testing10
mongoose10
javascript10
redis10
testing10
clojure10
fs10
nodejs10
multipart-formdata10
mongodb10
immutability10
coffeescript9
ternary-operator9
npm9
asynchronous9
Programming languages (9)
Github contributions (5)
Automattic/monk
Nov 2013 - Mar 2014
The wise MongoDB API
Role in this project:
Back-end Developer & QA Engineer
Back-end Developer & QA EngineerContributions:9 commits in 3 months
Contributions summary:Leonid focused on refactoring and improving the promise implementation within the Monk library. They reimplemented the promise functionality using MPromise and added unit tests to ensure correct behavior. The user also fixed bugs related to the promise implementation and added A+ tests to verify compliance with the Promises/A+ specification. Overall, the user's contributions enhanced the reliability and testability of the core promise functionality.
apimongodb-apiwisenodejsmongoose
2do2go/mongodbext-relations
May 2018 - Oct 2021
mongodbext plugin that bring relations between collections
Contributions:3 reviews, 5 PRs, 14 pushes in 3 years 5 months
relationsmongooseodmmongodb-drivermongodb
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.