Sohair Ahmad

I’m an 11+ year Ruby on Rails specialist who thrives on turning complex product ideas into elegant, production‑ready software. My career began at Square63 (2015 – 2017), where I shipped customer‑facing features for yoga‑class marketplace YogaTeam and family‑scheduling app WeTime, cutting page‑load times by 35 % and introducing RSpec‑based CI pipelines.

From there I moved into start‑ups that demanded end‑to‑end ownership of both code and cloud:

• Fair.com (2017 – 2019) – Led the checkout‑flow rewrite, exposing GRPC services from a monolith and integrating Stripe; transaction errors dropped 42 %.
• Shift CRM (2019 – 2020) – Introduced Python micro‑services alongside Rails, added searchkick‑powered elastic search, and mentored five junior devs in test‑driven development.
• SnapRent (2020 – 2021) – As FinTech lead, built KYC, payouts, and ledgering; PostgreSQL partitioning cut monthly reports from 4 h to 12 min.
• getButler (2021 – 2022) – Full‑stack lead on a housekeeping SaaS; paired Hotwire/Turbo streams with AWS S3 + ActiveStorage for real‑time booking updates seen by >10 k users/week.
• Infinikorn (2022 – 2023) – Architected a Rails 7 + Hotwire meeting‑and‑task platform; Terraformed ECS Fargate clusters across staging/production and rolled blue‑green deploys with zero downtime.
• TheBlankApp (2023 – present) – Built an AI‑powered image‑generation suite and vendor‑contract ingestion pipeline. Here I integrated OpenAI, Stability.ai, and in‑house LLM prompts, added PDF text‑extraction services, and automated QA with Interactor service objects.

Alongside product work I consult for Qababoard’s subsidiary Yanel, guaranteeing a weekly base of hours and delivering continuous enhancements to their Ruby‑on‑Rails/React stack.

• Back‑end: Ruby (2.7 – 3.3), Ruby on Rails (4 → 7), RSpec, Sidekiq, GRPC, graphQL APIs, Service‑object patterns (Interactor), searchkick, paper_trail.
• Front‑end & Mobile: Hotwire (Turbo, Stimulus), React, Next.js, Tailwind; Apple in‑app‑purchase flows.
• DevOps / Cloud: AWS (ECS Fargate, RDS PostgreSQL, S3, CloudWatch), Terraform IaC, GitHub Actions CI/CD, DigitalOcean App Platform with auto‑scaling containers.
• Data & AI: PostgreSQL design/partitioning, Redis, PDF/OCR extraction, OpenAI & Stability.ai integrations for contract analysis, chat, and image generation.
• Payments & FinTech: Stripe (subscriptions, upgrades/downgrades, webhooks), KYC/AML, multi‑currency ledgers.
• Leadership: Agile story‑writing with clear acceptance criteria, code‑review culture, onboarding & mentoring junior engineers, cross‑functional collaboration with product and design.

Across these roles I have worn hats ranging from Senior Full‑Stack Engineer to Tech Lead and DevOps advocate, always focusing on clean architecture, exhaustive test coverage, and developer happiness. If your team needs a hands‑on engineer who can both plan the roadmap and ship the pull‑requests—while keeping cloud spend and technical debt in check—I’m ready to help.