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Paweł – Node.js, AWS, Typescript, experts in Lemon.io

Paweł

From Poland (GMT+2)

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Full-stack Web DeveloperSenior
Hire developer
22 years of commercial experience
Art and creativity
Biotech
Cryptocurrency
Data analytics
Fintech
Healthtech
Human resources
Marketing
Social media
Enterprise software
Mobile apps
Platforms
Virtual reality software
Lemon.io stats
1
projects done
98
hours worked
1
offers now 🔥

Paweł – Node.js, AWS, Typescript

Pawel is a mighty coder with 20 years of commercial experience under his belt. Having mastered his skills as an iOS developer, he decided to immerse himself into Full-stack JavaScript/Typescript development, utilizing powers of React, Node.js and AWS for creating web experiences. Pawel feels thrilled about building architecture, solving complex tasks, and discovering new techs: he has recently started working with Golang and would love to dive deeper into the Web3 and AI world. His background includes projects within fintech, social media and healthtech domains.

Main technologies
Node.js
6 years
AWS
4 years
Typescript
4 years
JavaScript
6 years
React
6 years
Blockchain
1 year
Additional skills
GCP
Elixir
Golang
Terraform
Kubernetes
Angular
PostgreSQL
Nest.js
DevOps
Python
MongoDB
Web 3.0
DynamoDB
web3.js
Ethereum
Ethers.js
MySQL
Docker
React Native
Redis
Ruby on Rails
Apache Airflow
NFT
Stripe API
GraphQL
DigitalOcean
Material UI
Express.js
Redux
Ready to start
a week/max two weeks from the decision
Direct hire
Potentially possible

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Experience Highlights

Senior Software Engineer
Sep 2023 - Ongoing1 year 3 months
Project Overview

A service for managing and authorizing users using a CIAM (Customer Identity and Access Management) approach. This service was designed to be utilized by other services within the overall project framework.

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Responsibilities:

Pawel focused on developing microservices that integrated with external CIAM software and a microservice for managing and storing consents. All components were built in Golang and deployed on Kubernetes within AWS.

Project Tech stack:
Golang
AWS
Kubernetes
Amazon SQS
Java
Spring Boot
Principal Senior Engineer
Jan 2023 - Sep 20238 months
Project Overview

The project involved creating a system designed for preschool and early elementary school teachers in the USA to support the Montessori teaching method. The system includes a robust backend along with both mobile and web applications, providing essential tools for managing and conducting classes according to Montessori principles.

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Responsibilities:

I was co-responsible for designing the architecture of the entire solution and developing the backend. The backend was built using AWS Lambda with the NestJS framework, AWS DynamoDB for the database, and AWS Cognito for authorization, integrated with Microsoft Entra ID federation. The infrastructure was deployed using AWS CloudFormation.

Project Tech stack:
Node.js
AWS
Senior Back-end / Full-stack Developer
Jul 2022 - Jan 20236 months
Project Overview

It's a company that connects investors with companies, providing transparent, comparable ESG data in real-time.

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Responsibilities:
  • Developed new features based on business requirements;
  • Built Golang back-end and Angular front-end;
  • Updated GCP infrastructure using Terraform;
  • Wrote unit and integration tests;
  • Fixed bugs;
  • Architected migration from a legacy system to the main platform (API design for front-end client, back-end integration with Contentful CMS system, scripts for migrating existing data/users).
Project Tech stack:
Golang
Angular
Kubernetes
GCP
Terraform
Auth0
Typescript
JavaScript
Express.js
Senior Software Engineer / DevOps
Jan 2020 - Jan 20233 years
Project Overview

It's a social app that integrates with platforms like Facebook, Instagram, LinkedIn, Tiktok, and Pinterest to help manage and plan to post.

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Responsibilities:
  • Created a JavaScript tool that parsed existing Node.js app codebase and generated an endpoints list in Swagger output format;
  • Resolved subscription payments issues on the iOS platform;
  • Created scripts for exporting data from MongoDB and Google Firestore, aggregated them, and imported them to Google BigQuery;
  • Reduced AWS cloud costs by half;
  • Built a gathering logs system for mobile clients and back-end components based on the ElasticSearch cluster.
Project Tech stack:
iOS
Swift
MongoDB
BigQuery
Node.js
AWS
Lambda
GCP
Firestore
ElasticSearch
DevOps
React
Python
Heroku
Cloud Architecture
Serverless Computing
AWS CloudFormation
Senior Software Engineer
Apr 2022 - Aug 20224 months
Project Overview

It's an NFT marketplace system to sell artists' artworks based on Ethereum smart contracts.

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Responsibilities:
  • Implemented a method to generate a signature used for authorization of the minting process;
  • Created a back-end for the auction system to manage users, organizations, and auction drafts;
  • Built a solution to sync auctions and auctions related entities from the Contentful CMS system with the back-end system;
  • Created a solution to sync Ethereum network events with the back-end system.
Project Tech stack:
React
Typescript
JavaScript
Node.js
Lambda
DynamoDB
Serverless Computing
Web 3.0
web3.js
Ethers.js
Ethereum
Blockchain
NFT
Stripe API
Express.js
Tech Lead
Jan 2022 - Jul 20225 months
Project Overview

It's an app that provides access to muscle-mind analysis technology and education on interpreting the analysis data and creating resulting biofeedback training methods.

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Responsibilities:
  • Designed back-end, front-end, and mobile architecture (Kubernetes cluster);
  • Implemented front-end backoffice admin panel using React, React Query, and React Admin;
  • Built back-end using Node.js, Typescript/JavaScript, and PostgreSQL database;
  • Supported Flutter mobile app development.
Project Tech stack:
React
Nest.js
Node.js
Typescript
JavaScript
TypeORM
Flutter
iOS
PostgreSQL
Redux
Express.js
Tech Lead / Architect
Jan 2021 - Feb 20221 year 1 month
Project Overview

It's an all-in-one mobile platform where health-conscious users can easily track their meals' nutrition and plan their diet.

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Responsibilities:
  • Designed solution architecture based on AWS services for back-end, mobile, and ETL processes;
  • Created back-end using AWS AppSync with AWS Lambda resolves and GraphQL;
  • Supported iOS native mobile client development (Swift);
  • Designed and implemented ETL process to import USDA food database using AWS Glue service;
  • Created back-office admin panel using React framework.
Project Tech stack:
Typescript
Node.js
AWS
Lambda
AWS CloudFormation
JavaScript
React
Amazon RDS
PostgreSQL
Amazon Cognito
Swift
iOS
Knex.js
DevOps
Ansible
Redux
Express.js
Senior Full-stack Developer
Dec 2017 - May 20213 years 5 months
Project Overview

It's a platform that rewards company employees for making positive health changes and staying motivated.

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Responsibilities:
  • Originally, was responsible for the iOS app development and bug-fixing and then switched to a full-stack role;
  • Integrated the platform with 3rd party providers like Garmin, Fitbit, and Apple HealthKit to gather, store, and process events from these platforms;
  • Built several microservice architecture components, which were integrated either by REST/GraphQL API or RabbmitMQ message broker.
Project Tech stack:
Ruby on Rails
Node.js
Typescript
Knex.js
JavaScript
MySQL
PostgreSQL
Redis
AWS
iOS
Swift
Kotlin
Android
Golang
Docker
Docker Compose
Kubernetes
Apache Airflow
RabbitMQ
React
React Native
Redux
Redux Thunk
Redux Saga
Express.js

Education

2007
Electronics And Telecommunication / Multimedia Internet Systems
Bachelor of Engineering

Languages

English
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