Rails Consulting Services for Legacy SaaS Apps

This page covers the specific work I take on, what's included in each engagement, and how projects typically start. If you've already read the homepage, this is the operational detail.

Services

Four engagement types. Most projects map cleanly to one of these — and many start as a short audit before turning into focused work or ongoing support.

01 — Upgrades

Rails Upgrade Support

What this is for

Help with Rails 6.x and 7.x upgrade planning and execution — including upgrades that have stalled on a long-running branch, feel risky to ship, or need a clear path through framework defaults and gem changes.

What I check or work on
  • Current Rails and Ruby version, target version, staged path
  • new_framework_defaults review and incremental enablement
  • Gem compatibility audit and replacements for unmaintained gems
  • Config and initializer changes — load_defaults, Zeitwerk, autoloading
  • ActiveStorage and image processing (variants, vips, mini_magick)
  • Mailers, ActiveJob, and Sidekiq compatibility with the target version
  • Caching behavior under the new defaults
  • Deployment and rollback flow during the upgrade window
Typical outcome

A staged upgrade plan where each step is independently shippable, and the upgrade actually executed against your production environment — not a long-running branch that never merges.

More on Rails upgrade consulting

02 — Rescue

Production Debugging & App Rescue

What this is for

Stabilizing Rails apps that are running in production but have become hard to maintain — fragile workflows, recurring incidents, legacy patterns, and bugs that are hard to reproduce locally.

What I check or work on
  • Production logs and error tracker data (Sentry, Honeybadger, Rollbar)
  • Hard-to-reproduce bugs and intermittent failures
  • Risky areas in the code and fragile workflows
  • Legacy apps with limited test coverage on the critical paths
  • Deployment flow and rollback risk
  • Tribal knowledge gaps and unclear ownership
  • Targeted tests added around the changes most likely to break
Typical outcome

Specific production issues resolved, the riskiest workflows documented with tests around them, and a short list of follow-up fixes the team can keep working on without me.

More on legacy Rails maintenance

03 — Debugging

Performance, Caching & Sidekiq

What this is for

Investigating and fixing performance, caching, and background-job issues in production — slow endpoints, ballooning Redis memory, stuck queues, duplicate jobs, and the kind of issue where the symptom is obvious but the root cause is not.

What I check or work on
  • Slow requests, N+1 queries, and APM data
  • Database bottlenecks, indexes, and query plans
  • Cache memory pressure, evictions, and stampedes
  • Sidekiq queues, retries, duplicate or stuck jobs
  • Redis usage patterns and memory growth
  • Background-job reliability and idempotency
  • Production logs and metrics — and the gaps in them
  • Deployment risk for any change touching the hot path
Typical outcome

Worst offenders addressed with measurable improvement, background-job reliability restored, and instrumentation in place so the next regression is caught early — not in production.

04 — Ongoing

Fractional Rails Backend Support

What this is for

Senior Rails capacity, month to month, for teams that don't need a full-time backend hire but do need someone reliable to lean on — founders, CTOs, and agencies who want continuity without the overhead.

What I check or work on
  • Code review and PR feedback
  • Bug fixes and production debugging as issues come up
  • Upgrade and refactor work executed steadily over time
  • Architecture decisions and second opinions on tricky changes
  • Technical backlog execution at a predictable pace
  • On-call backup for production issues that need senior eyes
Typical outcome

A reliable senior pair of hands, predictable monthly capacity, and steady progress on the backend work that usually slips when the team is busy shipping features.

More on legacy Rails maintenance

How engagements usually start

Most projects start with a short technical review. I look at the Rails and Ruby version, gems, deployment flow, background jobs, caching, logs, and the main production risk. After that, I suggest one of three paths: a focused fix, a written upgrade or debugging plan, or ongoing support — depending on what the app actually needs.

Engagement formats

Three ways to work together. Pick the one that fits, or start with an audit and decide from there.

Audit

One-time Rails audit

A focused review of your Rails app — versions, gems, deployment, background jobs, caching, and production risk. Delivered as a written report with prioritized findings and recommended next steps. Useful before an upgrade, after a handover, or when you want a clear-eyed second opinion.

Project

Focused debugging or upgrade project

A defined piece of work with a clear scope — a Rails upgrade to a target version, a specific performance issue resolved, or a reliability problem investigated and fixed. Defined timeline, written outcome, fixed price or capped budget.

Ongoing

Monthly fractional support

Ongoing senior Rails support, billed monthly. A predictable number of hours per week for code review, bug fixes, upgrades, debugging, and steady backlog progress. Useful when you need continuity without hiring full-time.

Not sure which service fits?

Send me a short description of your Rails issue. I'll reply with possible next steps.

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