Daniel is available for hire
Hire DanielDaniel Nuske
Verified Expert in Engineering
JavaScript Developer
Pilar, Buenos Aires Province, Argentina
Toptal member since March 3, 2014
Bio
Daniel is a fast learner, an excellent communicator, and a broadly experienced software architect. He is a strong problem solver and full-stack developer, working with everything from the data to the UX. Daniel focuses heavily on resource usage and best practices in software development.
Portfolio
Mailberry
React, Express.js, Serverless, TypeScript, Next.js, Leadership...
Raven Ops
MySQL, Go, Node.js, React, TypeScript, Redux, Leadership, User Experience (UX)...
Sightlinemaps.com
Docker, NPM, Three.js, 3D, 3D Printing, Mapbox, Meteor, MongoDB...
Experience
- JavaScript - 20 years
- Python - 10 years
- SQL - 8 years
- Data-driven Programming - 7 years
- Node.js - 6 years
- React - 6 years
- jQuery - 5 years
- Software Technical SWOT Analysis - 5 years
Work Experience
Senior Full-stack Developer
2022 - 2026
Mailberry
- Built Mailberry's AI-first email marketing platform from zero to production as the first engineer, launching the first version in 3 months.
- Scaled the platform to send millions of emails per month for customers on a serverless AWS architecture.
- Designed and shipped a multi-agent orchestration layer in which AI agents execute marketing tasks for customers through internal APIs, reducing user setup time.
- Built eval suites that made AI agent quality measurable, so the team could iterate on prompts and agents with confidence before releasing changes.
- Hired and onboarded 3 engineers, including an ML/AI specialist, growing the engineering team from 1 to 4.
- Introduced spec-driven development with Claude Code and Codex, enabling the team to ship fully functional, well-tested features at a pace not possible without AI.
- Owned all architecture decisions across React, Node.js, PostgreSQL, AWS Serverless, and Vercel, turning the founder's vision into a live product.
- Set up CI/CD pipelines with GitHub Actions, enabling up to 10 production deploys per week.
- Designed and built an event-based flow automation system, from spec and data model to production features, so customers could trigger emails from user behavior.
- Resolved critical PostgreSQL/RDS issues, including transaction ID wraparound risk, through vacuum tuning and connection management, keeping the platform stable at scale.
Technologies: React, Express.js, Serverless, TypeScript, Next.js, Leadership, User Experience (UX), User Interface (UI), Artificial Intelligence (AI), Architecture, Microservices, React Query, Front-end, Full-stack, APIs, Authentication, Authorization, Automated Testing, CI/CD Pipelines, Data Modeling, Full-stack Development, REST APIs, Relational Databases, Software Architecture, Large Language Models (LLMs), AI Agents, Agentic AI, Cloud Architecture, Shopify, Shopify API, API Integration, HTML5, Single-page Applications (SPAs), CSS
Lead Full-stack Developer
2018 - 2019
Raven Ops
- Built the product from scratch using React, Node, Go, and MySQL, receiving feedback from customers and the team.
- Created a player tool that was able to play several data visualizations in sync with a video.
- Developed the site using React in a way that was performant for thousands of data records, and suggested best practices.
Technologies: MySQL, Go, Node.js, React, TypeScript, Redux, Leadership, User Experience (UX), User Interface (UI), Front-end, Infrastructure as Code (IaC), API Integration, Single-page Applications (SPAs), CSS
Software Developer
2015 - 2018
Sightlinemaps.com
- Customized Mapbox layers to fulfill the needs of the website and back-end processing.
- Made a separate back-end process in Python to put together the 3D model, using Python, Flask, and Celery.
- Deployed and maintained all necessary services installed on AWS and other services.
- Made the product to come up with a 3D STL ready-to-print model out of a square map selection. Totally awesome results.
- Optimized and minimized code to improve stability and moved code from the Python back-end with the goal of having only one stack of technologies: Meteor.
Technologies: Docker, NPM, Three.js, 3D, 3D Printing, Mapbox, Meteor, MongoDB, User Interface (UI), User Experience (UX), Microservices, Front-end, React, API Integration, CSS
Senior Data and Distributed Systems Engineer
2015 - 2015
Stridelabs.com
- Developed tons of new features for a mobile and web app such as getting the right thumbnails for users' files collections.
- Integrated a variety of third-party APIs such as Google Drive API, Dropbox, Box, and others.
- Did bug fixing and custom solutions to follow the business logic. Some problems were tricky; for example, streaming out files directly from third-party services to Stride app through StrideLabs back-end maintaining the security layer consistently during the process (so that files could be read by their owners only).
- Integrated Parse, Heroku, and several AWS services to compose a back-end that could fulfill the needs of the app.
- Worked with data indexing through Elasticsearch.
- Applied security rules over all data models, based on Parse security paradigms and enhancing it to StrideLabs' own back-end workers deployed on Heroku.
Technologies: Amazon Web Services (AWS), JavaScript, Express.js, Amazon DynamoDB, Parse, Node.js, GraphQL, RabbitMQ, Front-end, CSS
Data Integration Engineer
2014 - 2014
CommandIQ
- Worked for Command IQ, a company collecting and processing data for marketing and user acquisition purposes. Was part of the team adding features to the main product.
- Worked out integrations for new client data.
- Fixed bugs.
Technologies: Amazon Web Services (AWS), PostgreSQL, Flask, Python, User Experience (UX), User Interface (UI), Front-end, FastAPI, API Integration, CSS, AngularJS, Angular
Senior Developer
2013 - 2014
Globant
- Collaborated with a team in the last development ramp of a new product for National Geographic. Added new features, fixed bugs, and optimized various operations.
- Found the root of major problems that had been buried in the code for months.
- Excelled in development speed on Scrum metrics.
- Helped the back-end dedicated team to trace problems.
- Reported numerous bugs even though there was a separate QC team dedicated to this task.
Technologies: CoffeeScript, Sass, Backbone.js, Python, Front-end, CSS
Software Advisor
2012 - 2013
IIB-INTECH (Biotechnology Research Institute)
- Consulted on the software engineering way of thinking to bioinformatics doctorate students.
- Built simple yet powerful scripts to prove student ideas and experiments.
- Set up the VMware stack to give new students access to VMs to work on, and to facilitate easy disposal and reuse of resources.
- Migrated Perl services into Python services.
- Migrated all servers to VMware virtual machines.
Technologies: VMware, Perl, JavaScript, Python, Front-end, FastAPI, CSS
Innovation Supervisor
2012 - 2013
Interactive Bid Games, Inc.
- Re-engineered the entire project including bootstrapping and transitioning to a highly scalable mode.
- Moved the view management to the client side, implementing AngularJS from scratch.
- Built and led a team of 2 people to help me with the large amount of work.
- Designed a methodology to base new features and changes on user behavior data.
Technologies: Python, User Interface (UI), User Experience (UX), Front-end, FastAPI, CSS
Senior Python Developer
2010 - 2012
Leander Games
- Converted proof-of-concept software into a production-ready back-end to be consumed by Flash/JavaScript games.
- Applied an architecture-based programming methodology to reduce the time footprint of implementing new game logics.
- Added a semi-automatic scalable architecture to handle different loads at different times, reducing run costs.
- Completed an assessment to migrate games from Flash/AS3 to JavaScript.
Technologies: PostgreSQL, Memcached, Python, CSS
SSr Software Developer
2008 - 2010
Livra.com
- Developed a massive mail sender in Python and MySQL that moved the bottle neck out of it to the mailserver itself.
- Developed a quick MVP in PHP to create and share polls through social networks.
- Maintained XML-RPC services that perform complex queries to tag and categorize all database content overnight.
- Helped fix bugs in internal tools made in Java.
- Wrote hundreds of tests and docs for undocumented, untested production process.
Technologies: PHP, MySQL, Java, JavaScript, XML-RPC, Python, CSS
Software Developer
2005 - 2008
Cyclelogic
- Supported and maintained a system that manages SMS subscriptions to all of Latin America.
- Helped plan the construction of a new software stack to serve the content delivery and user subscription to all SMS services. Replaced old software entirely.
- Helped plan and set up new server environment migration from Microsoft technologies to Linux based ones.
- Researched new ideas of content and services to serve to users, some of which were the base on successful products months after.
Technologies: .NET, MySQL, Microsoft SQL Server, Python, Django, CSS
Project History
Event.py
A module that is the event connection between the dispatcher and receiver. This working version has one dispatcher type—PubNub—but has the interface to implement more. The module is part of a framework that enables the construction of real-time web applications without dealing with complex infrastructure in real time.
Macanudo
A daily paper comic fan page that automatically gathers issue comics from http://lanacion.com.ar/humor and displays them on the home page.
IBidGames
A Facebook game I developed. I was given a barely working project and had the mission to make it bug free and scalable to handle high traffic. The same back-end serves the mobile application as well as the web app. While the business is still young, software-wise it is ready to compete with the best players in the market. I managed to put together an interdisciplinary team to help me finish the project.
Promotional video: https://www.youtube.com/watch?v=4LnF-emsWu0
Promotional video: https://www.youtube.com/watch?v=4LnF-emsWu0
Sightline maps
This site allows the user to select a square on a map and get a 3D model ready to be 3D printed. I created the web app in Meteor and the back-end process in Python.
Batabing
An iPhone/Android app. Batabing finds people near you that match your requirements and allows you to get in touch with them. It features a back-end in Python/Postgres with geolocation.
Stridelabs
Stride Labs (available on iOS App Store) is an app that integrates several storage services like Google Drive, Dropbox, and Box to help people be more productive at work.
Education
1998 - 2004
Technician Degree in Electromechanics and Robotics
EET N°3 11 de Septiembre - Buenos Aires
Skills
Libraries/APIs
React, React Redux, Parse SDK, Node.js, jQuery, React Query, REST APIs, Backbone.js, SciPy, PyNum, itertools, Shopify API, Three.js, RequireJS, PubNub
Tools
Git, VMware, RabbitMQ, Atom, Sublime Text, NPM, PyCharm, Grunt
Languages
JavaScript, HTML5, SQL, Python, TypeScript, CSS, Less, Sass, CoffeeScript, Perl, Java, PHP, Go, GraphQL
Frameworks
Redux, Next.js, Sizzle, Flask, Django, .NET, Express.js, React Native, ASP.NET, PhoneGap, Bootstrap 3, AngularJS, Angular
Paradigms
REST, Model View Controller (MVC), Object-oriented Design (OOD), Data-driven Programming, Microservices, Automated Testing, Agile Software Development, High-performance Computing (HPC), Design Patterns
Platforms
Docker, Linux, Ubuntu, Shopify, Parse, Meteor, Mapbox, Amazon Web Services (AWS), FreeBSD
Storage
SQLite, Database Performance, Microsoft SQL Server, PostgreSQL, MySQL, Relational Databases, NoSQL, MongoDB, Memcached, XML-RPC, Amazon DynamoDB
Other
OAuth, Software Technical SWOT Analysis, Secure Software Development Lifecycle (SSDLC), Serverless, CTO, Leadership, Artificial Intelligence (AI), Architecture, User Interface (UI), Front-end, Full-stack, APIs, Authentication, Authorization, CI/CD Pipelines, Data Modeling, Full-stack Development, Software Architecture, Large Language Models (LLMs), FastAPI, AI Agents, Agentic AI, Cloud Architecture, API Integration, Single-page Applications (SPAs), SaaS, Introspective Project Research, User Research, Infrastructure as Code (IaC), 3D Printing, 3D, User Experience (UX), Cordova
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