Full-stack Developer

Location: Belgrade, Serbia

Experience: 17 years

Availability: Part-time

About the Position

We are seeking a highly skilled Full-stack Developer with expertise in PostgreSQL, JavaScript, and Ruby on Rails to join our team in Belgrade, Serbia.

Summary

N. is an experienced Ruby on Rails developer with over 15 years in software development. He graduated from the best computer science faculty in Serbia. Since then, he's been working on a variety of technologies and companies on projects for the US and EU markets. N. has even started his own companies and learned a lot about what is needed for a business to succeed. Currently, his passions are Ruby on Rails, blockchain, and startups.

Responsibilities

• Design and develop scalable backend services
• Write clean, maintainable code
• Collaborate with frontend team
• Integrate AWS Cognito authentication
• Optimize application performance
• Implement multi-tenancy features
• Develop complex solutions with APIs, authentication, and authorization

Requirements

• Core Skills:

  • PostgreSQL
  • JavaScript
  • Ruby on Rails
  • React
  • AWS
  • Stripe
  • Oracle PL/SQL
  • LaTeX

• Secondary Skills:

  • Agile Software Development
  • Software Architecture
  • APIs
  • Minimum Viable Product (MVP)
  • Back-end
  • Web Development
  • Cloudinary
  • CanCan
  • Front-end
  • Product Development
  • Payment Gateways
  • Retrieval-augmented Generation (RAG)
  • AI Agents
  • Notepad++
  • RSpec
  • Git
  • Microsoft Excel
  • JBuilder
  • Sublime Text 3
  • Sublime Text
  • Apache
  • NGINX
  • Redmine
  • TortoiseSVN
  • Subversion (SVN)
  • LaTeX
  • JSON
  • Oracle 11g
  • Oracle PL/SQL
  • PSQL
  • SQLite
  • Redis
  • Microsoft SQL Server
  • HTML
  • SCSS
  • CSS
  • SQL
  • XML
  • Ruby
  • Stored Procedure
  • PL/pgSQL
  • JavaScript
  • CoffeeScript
  • C#
  • Java
  • Model View Controller (MVC)
  • Object-oriented Programming (OOP)
  • Test-driven Development (TDD)
  • Database Design
  • Object-oriented Design (OOD)
  • Unit Testing
  • CRUD
  • Metaprogramming
  • Scrum
  • Agile Software Development
  • Software Testing
  • Design Patterns
  • ZURB Foundation
  • JSON Web Tokens (JWT)
  • Bootstrap
  • Bootstrap 3
  • Factory Girl
  • Angular
  • .NET
  • Spring
  • Hibernate
  • Ruby on Rails API
  • jQuery
  • Devise
  • Handlebars
  • Backbone.js
  • React
  • CarrierWave
  • Project Management

We Offer

• Competitive salary
• Opportunity to work in a dynamic and innovative environment
• Remote work options
• Professional development budget

About the Company

[Company description if present]

Work Experience

Software Developer

I.C.F.O.M.E.

2012 - 2024

• Worked on several projects, some of them pilot projects. The biggest were built for a thermal coal power station in Serbia (TE Kostolac). Built one app using Ruby on Rails, PostgreSQL as a database, and React as a front-end framework. The application shows a map of various businesses in Belgrade and a user can filter them, click on a pin on the map, and see all sorts of information. Created another app using Ruby on Rails and Oracle as a database. It keeps track of more than 7,000 types of spare parts for all kinds of vehicles and keeps track of which vehicle can use which part. Users are able to edit parts and filter them. Wrote procedures in Oracle PL/SQL for one application to calculate the average fuel consumption for excavators, bulldozers, and other vehicles on the open pit. Led the entire development process, including talking to the end customers, building functionalities, testing, deployment, and more. Gained experience in handling a demanding freelance schedule and workload.

Full-stack Ruby on Rails Developer

M.S.

2020 - 2022

• Worked on a reporting system for a general ledger accounting software. Integrated AWS Cognito authentication for login purposes. Made reports available in HTML, PDF, and Excel form. PDF was done using LaTeX.

Ruby on Rails Developer

T.S.V.T.

2016 - 2018

• Worked in an Agile environment with other team members. Implemented many features using Ruby on Rails, Angular, and Backbone. Worked with Stripe, PayPal, Mailgun, and Google Maps.

Ruby on Rails Developer

T.L.V.T.

2016 - 2016

• Worked on multiple tasks to add new functionalities to the application. Made significant improvement in application performances. Implemented Handlebars using JSON in a Ruby on Rails application. Implemented a multi-tenancy feature within the Ruby on Rails application.

CEO

P.

2015 - 2016

• Developed Phix.io, a startup company, completely by myself. Worked on the back end, front end, and deployment. Set up payment processing for the company with 2checkout. Utilized Cloudinary.com for cloud-based image storage. Integrated DigitalOcean for the server hosting platform.

CEO

W.

2013 - 2016

• Scored a $10,000 investment and joined StartupYard, an accelerator in Prague, Czech Republic. Gained new communication skills, pitching for many VCs and angel investors in Prague, Amsterdam, Split, and Belgrade. Learned about business development, customer development, and startup metrics; having a great team is a key point for success, and being able to communicate well within the team is a must. Building a product is a rewarding and challenging endeavor. Discovered that UX is as important as any other part of building a product, maybe even more important. Developed the application itself into a complex solution (Warrant.ly) with v2 currently in progress. It has an API on the back end using Rails, Angular on the front, authentication, authorization, and more.

Software Developer

D.I.

2012 - 2012

• Contributed to two projects, one of which was a complex Android app and the other of which was a Java application for Royal Caribbean International. Worked in a team with more than twenty developers, each with a specific assignment. Coordinated between the dev team in Serbia and HQ in NYC, working flexible hours to be available during US business hours. Learned to work under heavy pressure, despite it also being my first Android experience, since we had a very tight deadline.

Software Developer

M.B.S.

2011 - 2012

• Worked with.NET projects, gaining valuable insight into those technologies. Met and negotiated with domestic clients. Worked on some legacy projects from the '90s and saw firsthand the importance of using new technologies to get the job done much faster and cleaner. Learned some valuable lessons about carefully choosing a working environment where things that I value, like quality and honesty, are valued by the company as well.

Software Engineer

F.O.E.E.

2009 - 2011

• Created a payroll algorithm with more than 10,000 lines of bug-free code which calculated payrolls for thousands of people at healthcare institutions in Serbia. Worked from day one on a project called Moneo (part of HELIANT system) for which the algorithm was developed. Worked on the core part of HELIANT system, which represents Electronic Health Record systems (EHRs) designed in Java and is used for monitoring the work of doctors as well as keeping records of patients in these health care institutions.

Skills & Expertise

Tools

• Notepad++
• RSpec
• Git
• Microsoft Excel
• JBuilder
• Sublime Text 3
• Sublime Text
• Apache
• NGINX
• Redmine
• TortoiseSVN
• Subversion (SVN)
• LaTeX

Storage

• PostgreSQL
• PL/SQL Developer
• JSON
• Oracle 11g
• Oracle PL/SQL
• PSQL
• SQLite
• Redis
• Microsoft SQL Server

Languages

• HTML
• SCSS
• CSS
• SQL
• XML
• Ruby
• Stored Procedure
• PL/pgSQL
• JavaScript
• HTML5
• CoffeeScript
• C#
• Java

Paradigms

• Model View Controller (MVC)
• Object-oriented Programming (OOP)
• Test-driven Development (TDD)
• Database Design
• Object-oriented Design (OOD)
• Unit Testing
• CRUD
• Metaprogramming
• Scrum
• Agile Software Development
• Software Testing
• Design Patterns

Platforms

• Oracle
• DigitalOcean
• Linux
• Blockchain
• MacOS
• Windows
• Windows Mobile
• Android

Frameworks

• ZURB Foundation
• Ruby on Rails (RoR)
• JSON Web Tokens (JWT)
• Bootstrap
• Bootstrap 3
• Factory Girl
• Angular -.NET
• Spring
• Hibernate

Libraries/APIs

• Ruby on Rails API
• jQuery
• Devise
• Handlebars
• Backbone.js
• React
• CarrierWave

Industry Expertise

• Project Management

Certifications

• Blockchain Academy

Preferred Environment

• Sublime Text
• Git
• Linux
• MacOS

Amazing Thing

...thing I've built is a payroll algorithm with more than 10,000 bug-free code lines that do payroll for thousands of Serbians at healthcare places.