Paweł – Node.js, AWS, Typescript

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.