Tin Ceraj, Developer in Zagreb, Croatia
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Tin Ceraj

Verified Expert  in Engineering

Team Leadership Developer

Zagreb, Croatia

Toptal member since March 15, 2022

Expertise
Back-end DevelopersFull-stackGitHubGitPythonCSSREST APIjQueryJavaScriptTypeScriptMongoDBAlgorithmsFront-endWeb Scraping
Bio

Tin is an all-around developer with seven years of experience building web and mobile applications, microservices, and internal tools. He is able to switch between different working modes to deliver quality products with limited resources. He is looking for an opportunity to build a developer team with a mission-driven organization.

Portfolio

NumbaGoUp
APIs, Linux, Amazon Web Services (AWS)
Viatu
Amazon Web Services (AWS), Vue, Django, Quasar, PostgreSQL, GraphQL, REST APIs...
Three Brothers Family Office LLC
Python, Django, SQL, APIs, Ruby on Rails (RoR), Amazon EC2, PostgreSQL...

Experience

  • Git - 8 years
  • Python - 8 years
  • Django - 6 years
  • JavaScript - 5 years
  • Vue - 4 years
  • React Native - 2 years
  • Team Leadership - 2 years
  • React - 2 years

Availability

Part-time

Preferred Environment

Ubuntu, Slack, GitHub, GitLab, APIs, Python, REST APIs, Figma, Vue, Django

The most amazing...

...framework that I’ve created was for a startup in Croatia that they are using for all of their user interactions.

Work Experience

CTO

2024 - PRESENT
NumbaGoUp
  • Developed a profitable market-neutral crypto-arbitrage with 70% APY in 2024 with over one million AUM.
  • Created a monitoring system for redundancy and alerting through multiple channels.
  • Made key architecture decisions and researched the technologies and platforms used by the company.
Technologies: APIs, Linux, Amazon Web Services (AWS)

Full-stack Developer

2021 - 2024
Viatu
  • Developed the trip wizard, a standalone feature that creates new leads daily.
  • Optimized APIs to reduce customer wait times and improve the site's SEO.
  • Developed a high-impact affiliate program that is driving substantial revenue growth.
  • Implemented an internal tool that is used to design custom trips for all new customers.
  • Tracked and fixed any bugs that occurred and got reported or detected.
  • Contributed to tasks like communicating with non-technical teams, project planning, and hiring.
Technologies: Amazon Web Services (AWS), Vue, Django, Quasar, PostgreSQL, GraphQL, REST APIs, Web Scraping, OpenAI GPT-4 API, Django REST Framework, jQuery, Nuxt.js, Redis

Django Developer

2022 - 2022
Three Brothers Family Office LLC
  • Recovered and organized hundreds of database tables from a legacy project for a professional sports team.
  • Created a new dashboard for managing race horses from scratch based on a legacy project.
  • Communicated with non-technical members of the company, organized the project from the technical side, and delivered the project with detailed documentation.
Technologies: Python, Django, SQL, APIs, Ruby on Rails (RoR), Amazon EC2, PostgreSQL, Data Engineering, Vue, DigitalOcean, REST APIs, Web Scraping, Django REST Framework, jQuery

Software Engineer

2018 - 2021
Mindsmiths
  • Designed a cloud-hosted microservice platform for creating emotionally intelligent assistants.
  • Designed and implemented a front-end framework that became the standard way the company’s product integrates with new clients.
  • Led a team for implementing an AI assistant in healthcare, which was helping hundreds of people regulate their blood pressure during the trial.
  • Led a team for implementing an AI assistant for a bank which included collaboration with a team from the bank.
  • Mentored junior and mid-level developers in the company.
  • Implemented internal, as well as external interfaces and tools for managing assistants.
  • Led communication with the product team, CEO, and developers.
Technologies: Python, Django, JavaScript, Vue, Vuex, Git, Kubernetes, Amazon Web Services (AWS), Azure, Java, JBoss Drools, GitLab, Team Leadership, Mentorship, Technical Hiring, Technical Architecture, Docker, Full-stack, Front-end, Back-end, TypeScript, Microservices, APIs, HTML, CSS, MongoDB, REST APIs, Web Scraping, Django REST Framework, jQuery, Redis

Full-stack Developer

2016 - 2017
Buro
  • Designed and iteratively improved the entire house management flow.
  • Implemented a platform for managing buildings with various different user roles.
  • Developed a reactive web application in Django and React.
  • Automated workflow with mail and SMS integrations for specific user roles.
  • Set up the production environment on virtual private hosting.
Technologies: Django, Full-stack, Front-end, Back-end, APIs, Python, HTML, CSS, Django REST Framework, DigitalOcean, jQuery

Freelance - Full-stack Developer

2016 - 2016
Faculty of Humanities and Social Sciences
  • Developed a web application with Django and React.
  • Implemented an algorithm for assigning students with their classes.
  • Integrated everything with the existent client’s attendance tracking system with faculty.
  • Set up the production environment on virtual private hosting.
Technologies: Django, PostgreSQL, React, Full-stack, Front-end, Back-end, APIs, Python, HTML, CSS, REST APIs, Django REST Framework, jQuery

Experience

Bela - Online Card Game

https://bela.fun/
Created a React Native-based application for iOS, Android, and web for playing a popular card game in Croaita. Currently, the app has over a thousand daily users. I was working on the back end to implement the API, sockets, and AI algorithm for bots. On front end, I was working with a colleague to implement the app.

Bela Blok

A React Native app for keeping score in a popular card game in Croatia. The app is built with the goal to create intuitive and beautiful UI/UX and to learn React Native. It is used daily with almost ten thousand downloads.

Weather Compare

A simple React and Next.js app that helps users compare weather between different cities. Made with beautiful graphs and a simple-to-use interface to help with the comparison. Temporarily down due to the weather API used shutting down.

Stanotrazac

A web scraper that monitors all the real-estate pages on the market and notifies the customer whenever a property with his requirements shows up on any of the monitored real-estate pages. Users can add size, price, location, and other relevant information filters.

Education

2018 - 2020

Master's Degree in Computer Science

University of Zagreb, Faculty of Electrical Engineering and Computing - Zagreb, Croatia

2014 - 2018

Bachelor's Degree in Software Engineering

University of Zagreb, Faculty of Electrical Engineering and Computing - Zagreb, Croatia

Skills

Libraries/APIs

REST APIs, jQuery, Vue, Vuex, PyTorch, React, Node.js, Sockets

Tools

GitHub, GitLab, Git, PyCharm, Slack, JBoss Drools, Sentry, Grafana, Figma, ChatGPT

Languages

Python, JavaScript, TypeScript, HTML, CSS, SQL, Java, GraphQL

Paradigms

Object-oriented Programming (OOP), Microservices

Storage

MongoDB, PostgreSQL, Redis

Frameworks

Django, Django REST Framework, Nuxt.js, React Native, Next.js, Quasar, Ruby on Rails (RoR)

Platforms

Ubuntu, Docker, DigitalOcean, Kubernetes, Amazon Web Services (AWS), Azure, Amazon EC2, Linux

Other

Patterns, Full-stack, Back-end, APIs, Scraping, Algorithms, Optimization, Team Leadership, Technical Architecture, Front-end, Web Scraping, Networks, Mathematics, Statistics, Machine Learning, Data Science, Mentorship, Technical Hiring, Prometheus, Data Engineering, OpenAI GPT-4 API, OpenAI

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