D.F.
Match Score — Senior Software Engineer (R...
The candidate demonstrates over 5 years of Ruby on Rails experience across multiple roles from 2013 to 2022, including rewriting platforms, building APIs, and implementing features, aligning closely with the core requirement for building complex Rails applications and backend infrastructure. Strong matches on PostgreSQL and Redis from a 2016-2020 role, OOP principles implied through extensive Rails work, and recent AWS/DevOps exposure support the tech stack needs, though Memcached is not evidenced and Rails usage appears absent in the last 2-3 years. Relevant seniority as Tech Lead with team leadership, API development, and full lifecycle contributions match the senior scope. Key concerns include lack of explicit recent (post-2022) Rails production work, potentially requiring ramp-up, no open source contributions, and current location in Brazil for a Berlin-based role despite prior Berlin experience. Achievements show impact like platform rewrites and integrations with some metrics. Overall, a strong historical fit with minor recency risks on core stack.
Summary
Experienced Software Engineer with 10+ years developing web applications, specializing in Ruby on Rails, JavaScript, Go, React, PostgreSQL, AWS, Elasticsearch, Redis. Proven leader in prioritizing features, team management, code quality (RuboCop, CircleCI), agile/Scrum, TDD, CI/CD, and optimizations for scalability/user experience.
Recent experience (2023-present): Integrated LLM-powered chatbots (GPT/Llama models) with RAG and AI agents for task automation; built platform integrations with data marketplaces (e.g., cloud analytics hubs, warehouses) to enable data monetization.
Key achievements:
- Rewrote core platform to Ruby on Rails with Elasticsearch for searchable government documents; collaborated cross-functionally for legacy migration, UX improvements, automated checks.
- Bootstrapped health web app features during pandemic: WebRTC video consultations, AWS/Terraform/Ansible ops, secure public REST API.
- Tech Lead (4+ years): Led teams building/maintaining platform with RoR/JS/Postgres; created Go-based CalDAV server for calendar sync; developed React patient app for online bookings.
- Earlier roles: RoR eCommerce/SaaS platforms with payments/SEO; API/docs with OAuth/third-party integrations; CMS migrations (to static sites); custom MVC frameworks; SOA/Java apps; Azure-hosted security platform with mobile clients.
Co-founder experience: Built/maintained eCommerce SaaS, trained teams on agile/RoR/Scrum.
Education: MBA Project Management, BS Computer Science (Brazilian universities).
Available part-time. Prefers macOS, GitHub, VS Code, Docker. Highlight: Led seamless data product listings/deliveries via major cloud warehouses/hubs.
Work Experience
Software Engineer
P. · 2024 - 2025
- Integrated an LLM-powered chatbot into the application, backed by models like GPT, Llama, etc. Developed AI assistants/agents to automate some of the business-related tasks using LLM tool function calls. Added RAG to the bot capabilities, to provide meaningful answers and context-rich task executions.
Software Engineer
D.G. · 2023 - 2025
- Implemented features in the main Datarade platform. Integrated the platform with various external data marketplaces, like Google Cloud Analytics Hub, Databricks, Snowflake, etc. Helped companies monetize their data and helped users fulfill their data needs.
Software Engineer
F. · 2021 - 2022
- Rewrote the F. core platform to a Ruby on Rails app. Developed the search mechanism using Ruby on Rails and Elasticsearch to ingest an array of different government document types (bills, regulations, and so on) and make it readily available and easily searchable for users. Collaborated with the design, QA, and product teams and transitioned all the legacy features to the new platform under the new designs/UX and with the maximum quality expected by users. Improved code quality by implementing features and tools that support the long-term maintainability of the codebase. The process included automated code checks, PR reviews, and code linting using CircleCI, Goodcheck, RuboCop, and other tools.
Software Engineer
F.H.M. · 2020 - 2021
- Implemented key features in the the company's Ruby on Rails web app, mostly bootstrapping core business strategies during the COVID-19 pandemic, by helping with development, planning, and architectural decisions. Revamped the Ruby on Rails main app, planning and implementing new features focused on time-to-market (TTM) and user experience. Implemented the video consultation feature from scratch (using WebRTC) to handle the big demand and limitations during the COVID-19 pandemic. Handled operations-related tasks such as managing the cloud infrastructure through AWS and tools like Terraform and Ansible. Developed the first public REST API from scratch (api.fullhealthmedical.com) using Ruby on Rails with a focus on security, clarity, and developer happiness.
Tech Lead and Software Engineer
S.G. · 2016 - 2020
- Led engineering teams and designed/developed core new features inside the Samedi platform. Developed features and maintained the Samedi platform using Ruby on Rails, JavaScript, PostgreSQL, Redis, and Elasticsearch. Created a CalDAV server from scratch in Go to handle and import appointments from the Samedi platform into mobile calendar clients. Built the Samedi patient side app in React (Patient.samedi.de), allowing patients to book appointments online.
Software Engineer
W. · 2015 - 2016
- Developed the W. web app and all its related features with Ruby on Rails in a Kanban workflow. Implemented modules to calculate payment fees depending on the chosen payment method. Added a feature that tracks and displays the user's recently viewed properties. Developed enhancements on the UX and usability of the availability calendars.
Software Engineer
A. · 2015 - 2015
- Refactored and improved the codebase, working mainly on the front end. Helped refactor and reduce around 30-40% of the front end's codebase. Developed and used a custom lightweight MVC-like framework with templating (Handlebars) and a simple custom-made binding system.
Software Engineer
C. · 2015 - 2015
- Migrated the whole company's website and blog from LocomotiveCMS to Jekyll. Redesigned the developer portal and reimplemented it using Jekyll. Implemented deployment and automation scripts in Ruby along the process.
Software Engineer
P. · 2015 - 2015
- Implemented and documented the P. API with OAuth/Doorkeeper authentication and Ruby on Rails on the back end. Integrated the Ruby on Rails app with several third-party apps like ZeroPush, Urban Airship, Segment, RescueTime, etc. Implemented the P. web dashboard app with client-side view rendering using JavaScript and REST APIs. Integrated the P. API with the P. iOS app.
Co-founder and Software Engineer
I.B. · 2013 - 2015
- Trained newcomers on improving productivity and quality by adopting agile methodologies and frameworks like Ruby on Rails, Scrum, TDD, and CI/CD. Built a SaaS eCommerce platform with Ruby on Rails using SEO and usability best practices. Developed integrations with different payment gateways. Made design and marketing decisions with feature prioritization.
Software Engineer
Z.I.S. · 2013 - 2013
- Implemented and maintained an eCommerce platform developed with Ruby on Rails that has over 1,000 users. Developed integrations with different payment gateways. Helped bootstrap a number of clients with their first online presence through an eCommerce website.
Software Engineer
A. · 2011 - 2012
- Built the A. platform, an application that offers security and convenience services based on a trusted network engine. Created cloud services hosted in the Windows Azure platform. Developed web app and systems using ASP.NET MVC and C#. Designed and implemented features for Windows Phone and Android clients. Conceived solutions for the platform's features and architecture.
Software Engineer
N. · 2010 - 2011
- Worked on the development of SOA-based web applications. Created an HR application to manage employee skills. Developed system automatizations in Java to handle network communication processes.
Skills & Expertise
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