Alexander Baikálov

Alexander Baikálov

Back End Developer | Data Science & Software Engineering

Barcelona, Spain
+34 633 83 75 66
asederado@gmail.com

Professional Summary

Backend developer with expertise in microservice architecture, API development, and database optimization. Proven track record in scalable backend solutions, decentralized systems, and full-stack development. Fluent in English, Spanish, Russian, and Catalan.

Experience

Back End Developer @ Dribba, the mobile agency

Barcelona - Hybrid

Mar 2025 - July 2026
  • Backend development, microservices with hexagonal architecture.
    Data transfer with GraphQL and gRPC API development with Go.
    Built Go services using goroutines, channels, and context for concurrency and performance.
    Optimized services with profiling, added resilient patterns (retries, circuit breakers, transactions).
    Google Cloud management (Registry, Observability, Logging, Performance Analysis)
  • Skills: Back-End Development (Golang mostly), Google Cloud, Kubernetes Cluster Management, Elasticsearch end-to-end management, Gitlab CI/CD pipelines

Software Engineer @ hello.app

Barcelona

Apr 2022 - Oct 2024
  • Full-time position developing backend and frontend systems.
    Initial core architecture development from scratch and kubernetes setup.
    Amazon Web Services management (instance management, load balancing, domain management)
  • Skills: Golang, AWS, PostgreSQL, Kubernetes, Linux, Docker, APIs, Code Review, REST, Data Analysis

Freelancer @ IT

Remote

Jan 2021 - Apr 2022
  • Mid to small software development projects
  • Including: CMS's, processes automatization, app development, data scrapers, crawlers, education, portfolios.

Mercari Crawler — Python

Freelance data-scraping tool still used to date and profitable to crawl, parse and clean Mercari product listings into structured, analysis-ready datasets.

VidreBany Factory — Workforce Management Platform

End-to-end freelance build: REST API, internal admin dashboard and native Android app.

  • Backend (Go, Gin)REST API with worker CRUD, work day scheduling, extra hours & public holiday management, PASETO auth, rate limiting, CORS, and Dockerized dev/prod deployments.
  • Dashboard (React, TypeScript, Firebase)Internal admin panel for production/standby/transport orders, user & admin management, non-conformity reporting with file uploads, and employee time-tracking, all synced in real time.
  • App (Java, Kotlin, Android)Native app with QR/barcode scanning for order and process management, enforcing sequential process validation and automatic order lifecycle handling.

SoulFriends — Java, Kotlin, Android

Social networking app for yoga enthusiasts: Officially deployed at Play Store, a firebase-powered real-time chat, location-based discovery with map, posts with likes/comments and media, push notifications, swipeable profile matching, and YouTube video playback.

Featured Projects

wallapop-flip-opportunities

Python, Jupyter Notebook

A flip opportunity prediction service based on multiple processes to scrape, extract, analyze and train a flip opportunity machine learning prediction model.

Technologies: AI, Data Science, Machine Learning, Data Engineering, Data Analysis

obramat-crawler

JavaScript

A system to retrieve data from obramat platform for analytics and statistics. Sleek analytics dashboard and data crawler of a construction site.

Technical Skills

Backend & Server

Linux PostgreSQL REST APIs GraphQL gRPC AWS Google Cloud Kubernetes Docker

Languages & Frameworks

Go TypeScript JavaScript Node.js React.js Java Kotlin Python

Education

Bachelor's in Data Science

Universitat Oberta de Catalunya (UOC)

Feb 2025 - Present

Focus: Machine Learning, Big Data

Associate's in Web Development

IES La Pineda

Sep 2021 - Jun 2023

Fullstack web development: design, responsiveness, backend, frontend, entrepreneurship, teamwork


Languages

English Native or bilingual
Spanish Native or bilingual
Russian Native or bilingual
Catalan Native or bilingual
German Elementary

Certifications

  • Git & GitHub - OpenWebinars (Mar 2023)
  • Agile UML - OpenWebinars (Dec 2022)
  • Introduction to Testing - OpenWebinars (Jan 2023)