Freelance Consultant
OBI
Schlagwörter
Skills
Main technological stack:
- JavaScript
- TypeScript
- React / ReactNative
- VueJS
- Node.JS (NestJS, Express)
- Ruby, Ruby on Rails
- Microservices (data pipelines, event-driven systems, CQRS, serverless architecture, ETL pipelines)
- Cloud Services (AWS Lambda, Kinesis, Fargate, DynamoDB, API Gateway, Google Cloud)
- Message Drive Architectures (Kafka, MQTT)
- DevOps / Infra (Terraform, Docker, Kubernetes, Helm, AWS)
- Elixir, Clojure
- Web3, Blockchain (cryptocurrencies APIs, ipfs, smart contracts, BTC, Ethereum)
- Mobile applications development (ReactNative)
- Software design, architecture
- Management, team building, mentoring
- Software quality assurance
Projekthistorie
09/2021
-
07/2022
Provided a software development and consultancy services for one of the IT-project of OBI Group (Mein OBI)
* Participated in the redesign and migration process of functionality from OBI mobile application to web clients, using VueJS
* Participated in the redesign and migration process of functionality from OBI mobile application to web clients, using VueJS
02/2020
-
04/2021
Freelance Project Lead
Grover GmbH
(Internet und Informationstechnologie, 50-250 Mitarbeiter)
Leading greenfield fintech project (Grover Card) and their mobile application for Grover GmbH
Link: https://www.grover.com/de-de/card
Grover Card is a mobile banking application similar to Revolut, N26, etc. Powered by Master Card.
* Successfully build and maintained a team of qualified engineers (hiring, management, mentoring)
* Created software architecture (backend & mobile FE)
* Highly involved in product decisions with PO, CPO, and design team
* Improved existing mobile application to solve problems of technical dept, performance, and various bugs
* Built new product functionality for banking (KYC, transactions, balances, 2FA, etc.)
Link: https://www.grover.com/de-de/card
Grover Card is a mobile banking application similar to Revolut, N26, etc. Powered by Master Card.
* Successfully build and maintained a team of qualified engineers (hiring, management, mentoring)
* Created software architecture (backend & mobile FE)
* Highly involved in product decisions with PO, CPO, and design team
* Improved existing mobile application to solve problems of technical dept, performance, and various bugs
* Built new product functionality for banking (KYC, transactions, balances, 2FA, etc.)
11/2015
-
12/2019
Senior Fullstack Engineer & Mentor
Babbel
Summary
Software engineer and mentor in the biggest language learning platform in Europe.
Key technologies used: Ruby/Rails, Node.JS, React, Redux, Docker, Terraform, AWS
Lambda, Kinesis, DynamoDB, Elixir
Achievements
* Successfully migrated front-end of internal advertising campaigns
management service to React.JS and adapted back-end (Rails) accordingly
* Implemented ab-testing microservice (Node.JS) in serverless architecture
using AWS Lambda and API Gateway
* Implemented ETL microservice (Ruby/Rails) for email delivery using Kinesis
events stream. Managed related infrastructure with Terraform
* Founded "Clean Code" Community-of-Practice in the company
* Mentored two junior engineers in the team
Software engineer and mentor in the biggest language learning platform in Europe.
Key technologies used: Ruby/Rails, Node.JS, React, Redux, Docker, Terraform, AWS
Lambda, Kinesis, DynamoDB, Elixir
Achievements
* Successfully migrated front-end of internal advertising campaigns
management service to React.JS and adapted back-end (Rails) accordingly
* Implemented ab-testing microservice (Node.JS) in serverless architecture
using AWS Lambda and API Gateway
* Implemented ETL microservice (Ruby/Rails) for email delivery using Kinesis
events stream. Managed related infrastructure with Terraform
* Founded "Clean Code" Community-of-Practice in the company
* Mentored two junior engineers in the team
02/2015
-
11/2015
Lead Software Engineer
Bitspark
Summary
Led a distributed team of engineers, enabling cheap and fast money transfers from
Hong-Kong to Philippines, powered by Bitcoins.
Achievements
* Architected the platform for fast money transfers (Blockchain,
cryptocurrencies (Bitcoin, Litecoin, etc.), Amazon AWS)
* Delivered working solution with high-quality, reliable and secure code in few
month (Ruby, Rails, Node.JS, React)
* Successfully leaded and mentored engineers in the distributed remote team
Led a distributed team of engineers, enabling cheap and fast money transfers from
Hong-Kong to Philippines, powered by Bitcoins.
Achievements
* Architected the platform for fast money transfers (Blockchain,
cryptocurrencies (Bitcoin, Litecoin, etc.), Amazon AWS)
* Delivered working solution with high-quality, reliable and secure code in few
month (Ruby, Rails, Node.JS, React)
* Successfully leaded and mentored engineers in the distributed remote team
11/2013
-
09/2014
Senior Fullstack Engineer
Dream Industries
Summary
Worked on the educational platform Theory&Practice - aggregator of lectures,
workshops and digital media on culture, art and science
Achievements
* Migrated back-end of the application to Rails 4 (refactoring, clean-up)
* Reworked front-end using AngularJS
* Successfully migrated servers infrastructure from VPS to Amazon Cloud
Worked on the educational platform Theory&Practice - aggregator of lectures,
workshops and digital media on culture, art and science
Achievements
* Migrated back-end of the application to Rails 4 (refactoring, clean-up)
* Reworked front-end using AngularJS
* Successfully migrated servers infrastructure from VPS to Amazon Cloud
12/2010
-
09/2013
Head of Engineering
YouRoute
Summary
Built and successfully led a team of engineers in a travel startup.
Achievements
* Implemented fault-tolerant concurrent API-data processing core in Ruby,
using EventMachine and AMQP as base of avia.youroute.ru
* Successfully integrated AngularJS (being beta at that time) on front-end to
improved user experience with highly responsive interface
* Used Chef to orchestrate infrastructure in Amazon Cloud (innovative for 2011)
Built and successfully led a team of engineers in a travel startup.
Achievements
* Implemented fault-tolerant concurrent API-data processing core in Ruby,
using EventMachine and AMQP as base of avia.youroute.ru
* Successfully integrated AngularJS (being beta at that time) on front-end to
improved user experience with highly responsive interface
* Used Chef to orchestrate infrastructure in Amazon Cloud (innovative for 2011)
05/2009
-
03/2010
Fullstack Engineer
AlterGeo
Worked on GSM-based logistics-tracking and POI database service.
Reisebereitschaft
Weltweit verfügbar
