K.S.
Match Score — Senior Software Engineer (R...
The candidate demonstrates over 14 years of continuous Ruby on Rails experience across multiple senior roles, with recent hands-on work in building APIs, backend infrastructure, Redis caching, and performance optimizations, aligning closely with the job's core requirements for 5+ years of Rails development and vast Ruby knowledge. Strongest signals include extensive recent Rails usage in fintech and e-commerce (2022-present), leadership in migrations and deployments with Docker/AWS, and direct experience with Redis/Sidekiq/Elasticsearch. Main concerns are lack of explicit mention of PostgreSQL or Memcached (though RDBMS and caching are implied), no open source contributions, and Bachelor's degree only (no Master's). Location in Australia may pose timezone challenges for a Berlin-based remote role. Skills are current and non-stale, with no misleading claims.
Summary
Senior Ruby on Rails developer with over 15 years of experience building scalable web applications, fintech platforms, e-commerce systems, SaaS solutions, and APIs for sectors including healthcare, logistics, telecom, and VoIP. Expertise in Ruby, Rails (including API mode), JavaScript (jQuery to React migrations), TDD, Elasticsearch, Redis, Sidekiq, and background job processing. Proficient in cloud deployments on AWS (EC2, S3, ECS, Fargate), Heroku, Docker, Kubernetes, Jenkins CI/CD, Pulumi, and Kamal for infrastructure automation. Strong track record in legacy system upgrades, performance optimization, mentoring offshore teams, code reviews, and Agile practices. Holds a Bachelor's in Computer Engineering. Currently available full-time, prefers MacOS/Linux environments with NeoVim, VS Code, or Sublime. Based in Sydney, Australia.
Work Experience
Senior Software Engineer
D.T. · 2023 - PRESENT
- Built and optimized fintech platforms to improve scalability and accessibility of financial advice services. Designed and developed user interfaces and backend APIs with Rails and JavaScript. Deployed services on AWS ECS and Fargate using Pulumi and kamal for infrastructure automation. Collaborated with cross-functional teams to troubleshoot and deliver production-ready solutions.
Senior Software Engineer
S. · 2022 - 2023
- Developed and maintained e-commerce systems integrated with Salesforce. Delivered new features with Ruby on Rails, applying TDD for maintainable code. Handled deployments and upgrades on Heroku with Salesforce and Heroku Connect. Implemented ElasticSearch, Redis, and Sidekiq for performance and background jobs.
Senior Web Developer
C.A. · 2015 - 2022
- Drove and participated in the setting of development standards in the areas of configuration management, tool adoption, and coding disciplines. Developed robust API architecture using Rails API mode, enabling third-party integrations. Implemented continuous deployment pipelines with Jenkins and Docker to streamline releases. Led development of SaaS-based booking and delivery systems for logistics providers. Migrated legacy systems to modern stacks( jQuery → ReactJS, DelayedJob → Sidekiq). Architected and deployed Rails + React solutions on AWS and Docker/Kubernetes. Improved system performance with Elasticsearch, Redis, and optimized Rails APIs. Provided code reviews, mentoring, and team leadership for offshore developers.
Senior Ruby on Rails Developer
M.V.T. · 2017 - 2019
- Built highly maintainable and structured back-end services with Ruby and Ruby on Rails. Participated actively in the development of front-end React applications. Supported development of APIs powering enterprise applications. Upgraded a legacy Ruby on Rails codebase to the latest version with full test coverage.
Senior Software Developer
C.N. · 2014 - 2015
- Managed hosting environments and promoted Rails best practices. Administered, maintained, and updated database content and architecture. Delivered projects across healthcare and blockchain using Rails and Ember.js. Built APIs for HIPAA-compliant telehealth platform eTherapi.
Senior Software Developer
I.A. · 2012 - 2014
- Maintained and built complex back-end VoIP Ruby Servers. Maintained complex VoIP systems and built Rails APIs to connect with Asterisk. Developed portals for SIM management, billing, and telecom operations.
Intermediate Software Developer
C. · 2009 - 2012
- Led the performance tuning and optimization of platforms under the guidance of a DevOps Engineer. Worked closely with team members to ensure architectural integrity, product quality, and that the client understood functional and system requirements. Researched and implemented new solutions based on Ruby on Rails best practices and a wide range of other technologies. Optimized architecture for high-volume data entry and processing.
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