Paweł – Node.js, AWS, Typescript

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.

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.

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.

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.

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

• 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).

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

• 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.

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

• 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.

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.

• 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.

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

• 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.

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

• 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.