Jevans Otieno

aka G-vans
Full-Stack Ruby on Rails Engineer

Software engineer with a Real Estate background. 2+ years building production systems in Rails across real estate, retail, and health sectors. Shipped end-to-end features on a US brokerage platform — transaction management, AI integrations, CRM systems. I build things that work.

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Experience
Independent Ruby on Rails Contractor Dec 2024 - Present
Agent Optimizer Inc. | Remote, USA

Full-stack engineer on BrokerageSpace — a real estate brokerage platform serving agents, offices, and transaction workflows.

  • Built transaction management with e-signature workflows (DocuSign, Dropbox Sign)
  • Replaced FullCalendar with a custom calendar engine — month/week/day views, timezone-aware scheduling
  • Integrated OpenAI APIs for AI-powered email/SMS composition, smart replies, sentiment analysis
  • Led platform-wide migration to ViewComponents-based design system
  • Modernized 90+ Stimulus controllers, standardizing CSRF handling and Turbo Streams
  • Built CRM features: lead pipelines, deal tracking, analytics dashboards
  • Developed multi-channel communication (email, SMS, VoIP) with Twilio integration
Ruby on Rails Developer Jun 2024 - Nov 2024
Giga Cypher Systems | Remote, Kenya
  • Maintained and enhanced POS & e-commerce systems
  • Took ownership of Sahibu Manager — rebuilt solo from neglected codebase
  • Built invoicing, payroll, reporting, and appointment calendar from scratch
  • Worked across Rails, PostgreSQL, Hotwire, and React
Projects

BrokerageSpace

Real estate brokerage platform. Transaction management, CRM, AI communications, custom calendar engine.

Rails Hotwire PostgreSQL OpenAI Twilio DocuSign

Comp Book

Property data engine. Upload valuation reports, AI-powered extraction, full-text search, analytics.

Rails 8 SQLite Claude API FTS5 Solid Queue

Chanjo Health

Child immunization system. Automated SMS reminders, voice follow-ups on missed schedules. 2nd place globally at TADHack.

Rails React Africa's Talking Twilio

CompsAnalytics

Property valuation tool for valuers to share comparables and run valuations using custom algorithms.

React Rails API PostgreSQL
Skills
Languages & Frameworks
Ruby Ruby on Rails JavaScript (ES6+) React SQL
Frontend
Hotwire Turbo Stimulus ViewComponents Tailwind CSS HTML5 / CSS3
Backend
RESTful APIs PostgreSQL SQLite Redis Sidekiq ActiveRecord
AI & Integrations
OpenAI API Claude API Twilio DocuSign Dropbox Sign Africa's Talking
Testing & Tools
RSpec TDD VCR Git GitHub Heroku Render Docker
Achievements
1st Runner-up — TADHack Global Hackathon 2023. Built immunization SMS reminders with Rails & Africa's Talking API. Placed 2nd globally.
1st Runner-up — Africa LawTech Festival Hackathon 2023. Led team to build AfriSoko cross-border trade platform.
1st Runner-up — Africa's Talking Monthly Hackathon 2023. Led team to build Chanjo immunization platform.
Founder — PropTech Kenya (KE PropTech). Community connecting tech innovators with property professionals. 2019-2023.
Advisory Board Member — Africa PropTech Forum. 2022.
Education
Moringa School Graduated Jan 2023
Software Engineering Bootcamp
JKUAT Graduated Nov 2019
BSc Real Estate — Second Class Upper Honours
Contact
Email
jevansstanley@gmail.com
GitHub
github.com/G-vans
LinkedIn
Jevan Otieno
X / Twitter
@Oya_ni_gee