Daniel Elero, Developer in Novi Sad, Vojvodina, Serbia
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Daniel Elero

Verified Expert  in Engineering

Full-stack Developer

Novi Sad, Vojvodina, Serbia
Toptal Member Since
July 22, 2021

Daniel is a full-stack product-oriented engineer with four years of experience working in a range of software industries: blockchain, fintech, legal and engineering software, video/audio processing, and custom IT services. Thanks to learning and adapting quickly to new technologies and domains, Daniel can hit the ground running on any project. As a co-founder of Plainly Videos, Daniel understands the full software development lifecycle from idea validation to building a full-featured product.


Plainly Videos
React, Tailwind CSS, TypeScript, Node.js, Zapier, APIs, Full-stack...
Open Law Library
Python, React, Redux, Django, TypeScript, Extensions, APIs, Full-stack, CSS3...
Real Market
React, Redux, Hyperledger Fabric, Hyperledger, IBM Cloud, Microservices...




Preferred Environment

Visual Studio Code (VS Code), Git, MacOS, ITerm

The most amazing...

...thing I've coded is an open-source Python Language Server SDK used by Microsoft's VS Code-Python extension.

Work Experience

Co-founder | Software Engineer

2020 - PRESENT
Plainly Videos
  • Co-founded a startup for dynamic video generation and went through the whole cycle from idea validation, MVP, and alpha product.
  • Implemented scripts for parsing Adobe After Effects projects and replacing video elements based on input data.
  • Worked on rendering the farm infrastructure and node deployment process.
  • Developed parts of the back end written in the Java Spring framework and relays on the CQRS architecture pattern; also created a fully-featured UI using React and Tailwind CSS.
  • Prepared files for Docker and Kubernetes deployment and set up Google Cloud services.
  • Became familiar with no-code development platforms to make prototypes.
Technologies: React, Tailwind CSS, TypeScript, Node.js, Zapier, APIs, Full-stack, Google Cloud, GraphQL, Google Cloud Platform (GCP), CSS3, HTML5

Python Software Engineer

2018 - 2021
Open Law Library
  • Developed and am still maintaining an open-source Python Language Server SDK (pygls) library used by Microsoft VS Code Python extension.
  • Developed a VS Code extension used for law codification based on pygls.
  • Extended an open-source security framework (Github.com/secure-systems-lab/securesystemslib) with additional signing algorithms.
  • Contributed to the development of a complex security system that guarantees the integrity of published laws; also integrated a hardware token for the signing of laws.
  • Ported multiple Python Flask applications to the Django framework.
  • Worked on an algorithm for showing differences between two XML documents.
  • Implemented a React application served by an MS Word extension using the Fluent UI kit and Redux.
Technologies: Python, React, Redux, Django, TypeScript, Extensions, APIs, Full-stack, CSS3, HTML5, Flask

Software Engineer

2018 - 2019
Real Market
  • Developed a platform for Hyperledger Fabric private blockchain infrastructure management in Node.js and React which significantly reduced the company's cloud costs.
  • Worked on the Hyperledger Fabric deployment to Kubernetes.
  • Set up custom authorization and routing microservices that were deployed as part of the Kubernetes cluster.
  • Implemented Go and Node.js smart contracts with a core logic for the crowdfunding platform we built.
  • Developed a decentralized voting system smart contract for in-house needs.
Technologies: React, Redux, Hyperledger Fabric, Hyperledger, IBM Cloud, Microservices, Kubernetes, Docker, Node.js, APIs, Full-stack, CSS3, HTML5, Flask, Blockchain

Software Engineer

2017 - 2018
Morneau Shepell
  • Extended an already huge database schema with new domain models.
  • Developed various SQL procedures to reduce the read/write times and integrated Redis caching service to remove the existing system's bottlenecks.
  • Coded various Python scripts for expression evaluations, as well as REST APIs to access different services.
  • Rewrote the front-end code from Angular to React and Redux.
Technologies: ASP.NET, React, Redux, Redis, Python, Entity Framework, SQL, TypeScript, JavaScript, APIs, Full-stack, CSS3, HTML5

Python Language Server SDK — pygls

A Pythonic generic implementation of the Language Server Protocol (LSP) for use as a foundation for writing language servers using Python. It allows you to write your own language server in just a few lines of code.

textX Language Server

A language server based on pygls that provides syntax highlighting, validation, and IntelliSense to all domain-specific languages defined with textX meta-language. It parses grammar files and uses meta information to provide IDE services over the Language Server Protocol.


A Hyperledger Fabric blockchain application for the animal pedigree integrity. I developed this in under 48 hours; the MVP was built during the biggest hackathon in Novi Sad and was admitted as the best fit for blockchain technology among 15 other teams.
2016 - 2018

Master's Degree in Computer Science

University of Novi Sad — Faculty of Technical Sciences - Novi Sad, Serbia

2012 - 2016

Bachelor's Degree in Computer Science

University of Novi Sad — Faculty of Technical Sciences - Novi Sad, Serbia


React, Node.js, Python Asyncio, Entity Framework


Git, ITerm, Zapier


Redux, Django, Flask, ASP.NET, Tailwind CSS


Python, TypeScript, HTML, SQL, JavaScript, CSS, CSS3, HTML5, Domain-specific Languages (DSLs), GraphQL


MacOS, Hyperledger Fabric, Hyperledger, Kubernetes, Docker, Google Cloud Platform (GCP), Blockchain, Visual Studio Code (VS Code)


PostgreSQL, Redis, Google Cloud




APIs, Full-stack, Software Engineering, IBM Cloud, Extensions, RPC, Multithreading

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