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I'm Renato, a senior web developer based in Copenhagen with over two decades of experience building scalable front-end and back-end systems for startups and enterprises across Europe. I enjoy turning complex requirements into robust, maintainable software and helping teams adopt modern cloud-native architectures, automated testing, and DevOps best practices. In my spare time I mentor junior developers and stay hands-on with the latest web technologies. I thrive on collaborative problem-solving, mentoring teams, and turning challenging requirements into polished solutions. I value clean code, thoughtful architecture, and delivering tangible value through well-structured APIs, responsive interfaces, and reliable deployments.…I'm Renato, a senior web developer based in Copenhagen with over two decades of experience building scalable front-end and back-end systems for startups and enterprises across Europe. I enjoy turning complex requirements into robust, maintainable software and helping teams adopt modern cloud-native architectures, automated testing, and DevOps best practices. In my spare time I mentor junior developers and stay hands-on with the latest web technologies. I thrive on collaborative problem-solving, mentoring teams, and turning challenging requirements into polished solutions. I value clean code, thoughtful architecture, and delivering tangible value through well-structured APIs, responsive interfaces, and reliable deployments.

Renato Barontini

Full Stack Developer, Front-End Developer, Back-End Developer, +2

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I'm Renato, a senior web developer based in Copenhagen with over two decades of experience building scalable front-end and back-end systems for startups and enterprises across Europe. I enjoy turning complex requirements into robust, maintainable software and helping teams adopt modern cloud-native architectures, automated testing, and DevOps best practices. In my spare time I mentor junior developers and stay hands-on with the latest web technologies. I thrive on collaborative problem-solving, mentoring teams, and turning challenging requirements into polished solutions. I value clean code, thoughtful architecture, and delivering tangible value through well-structured APIs, responsive interfaces, and reliable deployments.…I'm Renato, a senior web developer based in Copenhagen with over two decades of experience building scalable front-end and back-end systems for startups and enterprises across Europe. I enjoy turning complex requirements into robust, maintainable software and helping teams adopt modern cloud-native architectures, automated testing, and DevOps best practices. In my spare time I mentor junior developers and stay hands-on with the latest web technologies. I thrive on collaborative problem-solving, mentoring teams, and turning challenging requirements into polished solutions. I value clean code, thoughtful architecture, and delivering tangible value through well-structured APIs, responsive interfaces, and reliable deployments.

Available to hire

I’m Renato, a senior web developer based in Copenhagen with over two decades of experience building scalable front-end and back-end systems for startups and enterprises across Europe. I enjoy turning complex requirements into robust, maintainable software and helping teams adopt modern cloud-native architectures, automated testing, and DevOps best practices. In my spare time I mentor junior developers and stay hands-on with the latest web technologies.

I thrive on collaborative problem-solving, mentoring teams, and turning challenging requirements into polished solutions. I value clean code, thoughtful architecture, and delivering tangible value through well-structured APIs, responsive interfaces, and reliable deployments.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Language

Italian

Fluent

Danish

Intermediate

English

Fluent

Work Experience

Senior Full Stack Engineer at Octofy

February 1, 2025 - Present

Freelance, remote; collaborating with an AI start-up to integrate various LLMs into the octofy.ai platform. Frontend development in Next.js for the web app, mobile development in React Native (Expo), and maintenance of infrastructure with Docker Compose and CI/CD via GitHub Actions. Implemented chat encryption in PostgreSQL, designed model ranking for auto-selection, and enabled customers to use their own LLM API keys. Provided web development best practices guidance and mentorship to junior developers.

Senior Full Stack Developer at SafeguardGlobal

September 30, 2025 - September 29, 2025

Three-month contract to remove legacy code and modernize the stack from EC2-hosted to an ECS-based deployment. Delivered an interim AWS legacy environment in Terraform, rebuilt the platform in AWS ECS using CDK (Go) for IaC patterns, Dockerized the React frontend with Nginx, migrated legacy UI paths, and documented architecture and handover runbooks to enable self-service deployments.

Senior Full Stack Engineer at Ubiqisense

July 31, 2024 - September 29, 2025

Full stack engineer maintaining and extending the analytics platform for occupancy and space utilization in real estate. Working across frontend (Angular) and backend (Node.js) components, implementing data processing, cloud integrations, and testing.

Senior Full Stack Engineer at Openli

December 31, 2023 - September 29, 2025

SaaS platform for GDPR compliance. Migrated a PostgreSQL table to DynamoDB, performed housekeeping in Ruby on Rails and customer support, and promoted Test-Driven Development with TypeScript, AWS Lambda, DynamoDB, and PostgreSQL.

Senior Full Stack Engineer at LogPoint

December 31, 2022 - September 29, 2025

Inception of a brand-new SaaS product from architecture to implementation. Front-end in React 17 with focus on multi-region login handling, back-end API server in Node.js with cookie-based sessions, and ongoing management of AWS resources (S3, SSM). Implemented Cypress tests for front-end and Jest tests for back-end, plus GitLab-based CI/CD.

Senior Software Engineer at Tradeshift

January 31, 2022 - September 29, 2025

Front-end development in React and TypeScript across multiple projects. Implemented a React/Redux dashboard for a new product enabling early payments, migrated a B2B web shop from Angular 1.5 to React 16, and managed development via a personal Google Cloud environment with Kubernetes.

Senior Full-stack Developer at NewBanking

February 28, 2019 - September 29, 2025

Front-end development in Vue.js and back-end in Node.js. Built a stepwise KYC collection app with a state machine controlling screen transitions, defined by a JSON grammar downloaded from the server. Created a back-office UI to configure steps, and implemented RESTful APIs on the back end.

Fullstack Web Developer at DTU Library

February 28, 2018 - September 29, 2025

UI refresh and full-stack work on the Denmark Technical University Library search engine (findit.dtu.dk). Tech stack included Ruby on Rails, jQuery, Bootstrap, CSS, HTML, Apache Solr, Docker, and GIT.

Fullstack Web Developer at Modstrøm A/S

December 31, 2016 - September 29, 2025

Full-stack development with back-end in C# and front-end using AngularJS/JQuery, with Umbraco for CMS maintenance.

Consultant Fullstack Web Developer at Fujitsu A/S

August 31, 2016 - September 29, 2025

Reoriented toward consultancy; back-end Java web services, front-end self-service area, view-controller with HTML/XML/XSLT/CSS/JavaScript/JQuery, and model layer in Perl CGI; Perl used for server communication with web services.

Software Engineer at Motorola A/S

November 30, 2009 - September 29, 2025

Implemented a login feature in a TETRA central switching controller. C/C++ development on Solaris with system design documentation and automated test script specifications.

Software Engineer at NetTest A/S - Anritsu A/S

April 30, 2007 - September 29, 2025

Italy: Maintained and enhanced a distributed software system in C/C++ on Linux (MasterQuest) for correlating signalling data. Denmark: Ported to a portable version (InterQuest) and developed a C++/CORBA module for KPIs; Python sub-systems and XML/HTML web admin interface.

Software Engineer at Agilent Technologies

August 31, 2002 - September 29, 2025

Edinburgh: Developed new C++ test classes for production line; Perl scripts for test drives and results storage in Oracle. Later contributed to a telecom system project involving C/C++ on HP-UX and IMSI/TMSI mappings in GPRS.

Senior Full Stack Developer at Safeguard Global

June 1, 2025 - February 1, 2026

Led modernization of a legacy platform by migrating from EC2 to AWS ECS, delivering an interim Terraform-based legacy environment and building a fully versioned IaC stack with CDK (Go). Dockerized the React frontend, implemented an internal NLB for API routing, removed legacy code paths, and prepared DB migrations while documenting architecture and runbooks for self-service deployments.

Senior Software Engineer at Tradeshift

March 1, 2019 - January 1, 2022

Frontend development in React/TypeScript across multiple projects; built a Redux dashboard for invoicing; migrated a B2B web shop from Angular to React; managed development environments using Kubernetes on Google Cloud.

Senior Full-stack Developer at NewBanking

March 1, 2018 - February 1, 2019

Front-end in Vue.js; back-end in Node.js; designed a step-wise KYC flow with a JSON-defined process and an embeddable interface; back-office tools to configure steps and sequences; RESTful APIs for the flow.

Fullstack Web Developer at DTU Library

January 1, 2017 - February 1, 2018

UI refresh and front-end/back-end work for the library search engine; implemented enhancements to support hundreds of millions of records; tech stack included Ruby on Rails, jQuery, Bootstrap, HTML/CSS, Apache Solr, Docker, Git.

Consultant Fullstack Web Developer at Fujitsu A/S

May 1, 2010 - August 1, 2016

Reoriented career toward consultancy; backend Java web services; front-end self-service area; view-controller stack with HTML/XML/XSLT/CSS/JS/jQuery; model with Perl CGI; supported technology modernization.

Software Engineer at Motorola A/S

June 1, 2007 - November 1, 2009

Implemented a log-on feature for TETRA central switching; C/C++ on Solaris; produced system design docs and automated test scripts.

Software Engineer at NetTest A/S - Anritsu A/S

September 1, 2002 - April 1, 2007

Maintained and extended a distributed C/C++ Linux system; contributed Python modules and CORBA-based KPI generation; web interface for administration and configuration.

Software Engineer at Agilent Technologies

August 1, 1999 - August 1, 2002

Developed new C++ test classes for production line tools; Perl scripts for test automation; contributed to a telecom monitoring platform and real-time mapping project for IMSI/TMSI data.