Built the backend, trading engine, APIs, and iOS app for Proptee — a stock exchange for real estate.

As an early employee, I helped build the fractional investing feature, maintained the Apache Airflow data pipelines, played a core role in the transition to microservices managed by Terraform, and architected features such as TWRR return calculation.

Software Engineer

Proficient with Python, FastAPI, langchain, different LLM models, OpenAI's GPT and ChatGPT APIs, Anthropic's Claude, and many more.

Highly proficient with the latest web standards including: ES6 and web components; modern frameworks such as Vue.js, React, Next.js; modern tools such as esbuild, vite, prettier, eslint, etc.

I come from the days of Macromedia, jQuery, and Backbone.js. I was part of all the subsequent trends: AngularJS, Flux, React. Does anyone remember Bower, Grunt, and Fluxible?

I have experience with unit/functional/e2e/snapshot testing, REST APIs, SSE, WebSockets, databases (e.g. MongoDB, PostgreSQL), ORMs, and many other tools.

I still remember the first time I created a node.js app. It was a simple HTTP server. I love how easy it was to create it: just 1 file, a few routes with req/res, done.

Nowadays the stacks are a lot more complicated, but you don't have to figure it all out on your own. I'm here to help you with any issue.

I have production experience with: query optimisation, schema management, rollbacks, backups, disaster recovery, self-hosting, user management, extensions, procedures, triggers, transaction isolation, encryption, upgrades.

At Proptee I built a stock trading engine, double-entry bookkeeping system, and additional internal tools (campaign management, KYC/AML) on top of PostgreSQL.

I ran the backend for Proptee (one of my startups) in production on Kubernetes.

I am a Docker Certified Associate (Credential ID 10926646, Issued Oct 2017, Docker, Inc).

I have experience with popular IDEs, Kotlin, Java, the latest releases of Android, build systems, advertising SDKs, Google Cloud Messaging, Firebase, Facebook/Google SDK, Square's suite of libraries and many others.

When I was 18, I jumped head-first and created my first Android apps. One of them had over 50,000 users and made my mom proud when I showed her the first $100 I earned on the internet.

Since then I've built many more apps, both on Android and iOS, in multiple languages.

Low-level knowledge of blockchains, Solidity, smart contracts, toolchains.

Built the backend for Proptee, the stock exchange for real estate.

Python for Machine Learning, AI, scikit-learn, langchain, LLMs, unit testing, and many more.

I learned Java to build Android apps and to interview at Google. I used Java and C++ when I studied data structures & algorithms.

Scala is one of my favourite languages because it's a beautiful mix of object-oriented and functional programming.

Proficient with HTML and CSS pre-processors as well as modern solutions (e.g. JavaScript template literals).

Personal details

Alexandru R.

Summary

Technical skills

Work Experience