Rares R.

Rares R.

Fullstack Developer

Romania
Trusted member since 2026
6 years of experience

He has worked across healthcare, food delivery, fitness, e-commerce, and SaaS products, contributing to both monolithic systems and service-oriented architectures.

Rares is committed to clean code and effective collaboration. He works well in Scrum teams, communicates clearly, and takes ownership from implementation through to delivery, applying a pragmatic, product-focused mindset.

Main expertise

RubyRuby6 years
Ruby on RailsRuby on Rails6 years
RspecRspec6 years
SQLSQL6 years
14+

Experience11

N/A (Non Disclosure)

Senior Fullstack Ruby on Rails Engineer

N/A (Non Disclosure)
Healthcare IT
Mar 2025 - Aug 2026 · 1y 5m
  • Built and maintained scalable Ruby on Rails backend services for a healthcare platform under NDA.
  • Developed APIs and modular architecture using Rails Engines, PostgreSQL, and custom Ruby gems.
  • Improved performance, reliability, and maintainability across complex healthcare workflows and integrations.
  • Refactored legacy code and optimized database queries to reduce technical debt and production issues.
  • Contributed to automated testing, code reviews, and cross-functional delivery to ensure high-quality releases.
JavaScriptJavaScript
React.jsReact.js
Vue.jsVue.js
PostgreSQLPostgreSQL
RubyRuby
5+
Assista AI

Senior Fullstack Software Engineer

Assista AI
Artificial Intelligence (AI)
Jan 2025 · 1y 9m
  • Designed scalable front-end and back-end features, improving responsiveness, throughput, and user engagement.
  • Optimized databases and APIs, and refactored legacy codebases to reduce latency, improve scalability, and reduce technical debt.
  • Established automated testing, code reviews, and mentorship practices, improving code quality and overall team effectiveness.
JavaScriptJavaScript
React.jsReact.js
DockerDocker
PostgreSQLPostgreSQL
RubyRuby
3+
Doctolib

Senior Fullstack Software Engineer

Doctolib
Healthcare IT
Jul 2023 - Dec 2024 · 1y 5m
  • Built and optimized scalable front-end and back-end components, improving performance, reliability, and user experience at scale
  • Led cross-functional teams to align engineering delivery with business objectives, increasing predictability and execution efficiency
  • Optimized databases and API endpoints, and introduced automated testing, reducing latency, defects, and production risk under heavy load
  • Refactored legacy systems and translated product requirements into technical solutions, improving maintainability and accelerating feature delivery
React.jsReact.js
RubyRuby
Ruby on RailsRuby on Rails
Deliveroo

Senior Fullstack Software Engineer

Deliveroo
Food Delivery and Restaurants
Jan 2022 - Jul 2023 · 1y 6m
  • Developed scalable front-end and back-end components, improving responsiveness, user engagement, and overall platform performance at scale
  • Led cross-functional teams to align engineering priorities with business goals, accelerating feature delivery and optimizing resource usage
  • Improved system reliability by optimizing databases and APIs, refactoring legacy services, and increasing transaction throughput
  • Introduced robust testing and deployment pipelines, reducing production defects, minimizing downtime, and ensuring consistent availability
React.jsReact.js
PostgreSQLPostgreSQL
RubyRuby
Ruby on RailsRuby on Rails
AWSAWS
Moteefe

Senior Fullstack Software Engineer

Moteefe
Fitness and Wellness
Feb 2021 - Jan 2022 · 11m
  • Designed and built scalable backend services, improving reliability, reducing latency, and supporting higher user concurrency.
  • Coordinated cross-functional frontend and backend collaboration, accelerating feature delivery and boosting team productivity.
  • Optimized database schemas and queries and introduced automated testing, improving performance, code quality, and system stability.
  • Implemented deployment pipelines and monitoring, increasing application uptime and streamlining incident response.
JavaScriptJavaScript
PostgreSQLPostgreSQL
RubyRuby
Ruby on RailsRuby on Rails
AWSAWS
2+

Senior Fullstack Software Engineer

Thenx Fitness Studio
Fitness and Wellness
Jan 2020 - Jan 2021 · 1y
  • Designed and delivered scalable full-stack features, improving responsiveness, reliability, and user engagement across web and mobile platforms.
  • Aligned cross-functional teams with business objectives, accelerating product delivery and improving market responsiveness.
  • Optimized backend services and API integrations, reducing latency, improving uptime, and enhancing data accuracy across fitness platforms.
  • Implemented robust testing frameworks and automated deployment pipelines, minimizing defects and streamlining release cycles.
PHPPHP
MySQLMySQL
React.jsReact.js
PostgreSQLPostgreSQL
RubyRuby
4+
ThenX
Heria Pro
Self-Employed

Senior Fullstack Software Engineer (Remote Work Career)

Self-Employed
Information Technology (IT) and Services
Jan 2019 · 7y 9m
  • Designed scalable front-end and back-end features, improving responsiveness, throughput, and user engagement
  • Led cross-functional teams to align engineering priorities with business goals, accelerating product delivery
  • Optimized databases and APIs, and refactored legacy codebases to reduce latency, improve scalability, and reduce technical debt
  • Established automated testing, code reviews, and mentorship practices, improving code quality and overall team effectiveness
MySQLMySQL
React.jsReact.js
PostgreSQLPostgreSQL
RubyRuby
Ruby on RailsRuby on Rails
3+
3Pillar Global

Fullstack Software Engineer

3Pillar Global
Information Technology (IT) and Services
Jan 2019 - Jan 2020 · 1y
  • Built and scaled backend services to improve system reliability, performance, and reduce downtime.
  • Optimized database queries and application logic, significantly improving data retrieval speed and user experience.
  • Collaborated with cross-functional teams to translate customer requirements into delivered features, driving adoption and relevance.
  • Automated testing and refined deployment pipelines, improving code quality, reducing defect resolution time, and accelerating release cycles.
Angular.jsAngular.js
React.jsReact.js
PostgreSQLPostgreSQL
RubyRuby
Ruby on RailsRuby on Rails
AWSAWS
Wolfpack Digital

Fullstack Software Engineer

Wolfpack Digital
Information Technology (IT) and Services
Jul 2018 - Jan 2019 · 6m
  • Built and scaled backend services, improving system reliability, uptime, and performance for critical applications.
  • Optimized databases and refactored legacy codebases, reducing response times and enhancing stability across platforms.
  • Implemented automated testing and refined CI/CD pipelines, increasing code quality, accelerating releases, and reducing production issues.
  • Collaborated with cross-functional teams to deliver new features, driving higher user engagement and customer satisfaction.
JavaScriptJavaScript
React.jsReact.js
Vue.jsVue.js
PostgreSQLPostgreSQL
RubyRuby
4+
Greppy Systems

Fullstack Software Engineer

Greppy Systems
Information Technology (IT) and Services
Jan 2018 - Jun 2018 · 5m
  • Developed and deployed scalable backend components, improving system reliability, responsiveness, and customer experience.
  • Optimized backend algorithms and performance under varying loads, reducing latency and improving overall application efficiency.
  • Implemented automated testing frameworks, increasing code quality and minimizing defects during release cycles.
  • Collaborated cross-functionally and resolved complex production issues, ensuring uptime and accelerating delivery of critical features.
PHPPHP
RubyRuby
Ruby on RailsRuby on Rails

Wordpress Developer

Casa din Piatra
E-commerce
Jan 2017 - Jan 2018 · 1y
  • Developed and customized WordPress themes and plugins, improving functionality, responsiveness, and user engagement across e-commerce sites.
  • Optimized performance and loading speed, increasing reliability and reducing downtime across multiple client websites.
  • Implemented responsive design and refactored legacy themes to ensure consistent user experience across devices.
  • Collaborated with design and content teams and maintained security updates, aligning sites with brand standards and safeguarding data.
PHPPHP
JavaScriptJavaScript
WordPressWordPress

Engineering excellence

All Fullstack Developers who have applied to Proxify are scored from 0 to 300 on engineering excellence, one of the five parameters we evaluate. This score reflects engineering excellence only, based on interviews, take-home assignments, live coding sessions, and/or on-the-job performance reviews. The curve shows how all evaluated Fullstack Developers are distributed across that range, where our acceptance threshold for this parameter sits, and where Rares stands.

050100150200250300Engineering excellence scoreShare of engineersmedianmeanProxifyacceptancethreshold
Rares
Score 186 · Top 12% of engineers

Portfolio

Highlighted by Rares

ThenX 1
Thenx Fitness Studio
ThenX

Other projects 1

Heria Pro

Education

Babes-Bolyai University
Babes-Bolyai University
Computer/Information Technology Administration and Management2019 - 2022
NC"
National College "Mihai Eminescu"
Computer Science2010 - 2014

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