SparkRails
Senior Ruby on Rails Consultant
for Legacy SaaS Apps
I help remote SaaS teams upgrade, debug, stabilize, and maintain production Rails applications — especially older Rails apps with performance, Sidekiq, Redis, caching, or upgrade problems.
Available for US, UK, Europe, Canada, Singapore, and remote-first teams.
Is your Rails app becoming hard to maintain?
If any of these sound familiar, you're not alone — and they're fixable.
- Rails upgrade stuck on an old version
- No test coverage — every change feels risky
- Slow pages or background jobs in production
- Redis / Sidekiq issues — stuck jobs, retries, memory growth
- Cache memory problems and unpredictable evictions
- Old gems and a fragile production deployment
- Senior Rails developer left — no clear owner
- Changes that used to take a day now take a week
How I can help
Focused engagements built around the work your team actually needs — not a generic agency package.
Rails Upgrade Support
Move from Rails 4.x, 5.x, or 6.x to Rails 7 with a clear, incremental plan. Gem audits, deprecation cleanup, and the painful edge cases that block upgrades in real production apps.
Learn moreLegacy Rails App Rescue
For apps that have grown messy — limited tests, outdated patterns, unclear ownership. I stabilize the codebase, document the critical paths, and make day-to-day changes safe again.
Learn morePerformance, Caching & Sidekiq Debugging
Slow endpoints, ballooning Redis memory, stuck Sidekiq queues, cache stampedes. Investigation with profiling, logs, and metrics — then targeted fixes, not rewrites.
Learn moreFractional Rails Backend Support
Ongoing senior Rails capacity for teams without a dedicated backend lead. Code review, architecture input, on-call backup, and steady progress on the backlog you keep deprioritizing.
Learn moreHands-on production Rails experience
Years of work inside production Rails codebases — the kind that have been running for a long time, carry real customers, and can't be paused for a rewrite.
- Rails 6 and Rails 7 upgrade work on live SaaS apps
- Debugging production issues with logs, metrics, and profiling
- Sidekiq and Redis workflows — queues, retries, memory, reliability
- Caching and performance investigation across requests and jobs
- Legacy Rails apps with limited test coverage
- Safe, incremental refactors on apps that can't go down
Hi, I’m Abhishek Kanojia.
I’m a senior Ruby on Rails developer and consultant based in Delhi, India, working remotely with SaaS and product teams.
I help teams upgrade legacy Rails applications, investigate difficult production issues, improve Sidekiq, Redis and caching reliability, and complete backend work that has remained stuck because of technical complexity.
When you work with SparkRails, you work directly with me — from understanding the problem and reviewing the codebase to implementation and production validation.
Have a Rails app that needs help?
Send me a short description of the issue. I'll reply with possible next steps.
Book a Rails consultationWriting on Rails
8 Steps Before You Upgrade Rails 6 to Rails 7 (Production-Safe)
rails rails-7 rails-upgrade legacy-rails production
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