Independent Rails & PostgreSQL expert
I am an independent Ruby on Rails expert helping SaaS teams diagnose production problems, modernize legacy Rails applications, manage framework upgrades, and deliver difficult product work. You work directly with me from hands-on implementation through technical handoff—there is no agency handoff.
01 / Where I can help
A visible performance problem, a fragile legacy subsystem, a Rails upgrade, and an important delivery gap call for different scopes. Each consulting engagement starts by defining the outcome, constraints, and evidence.
Trace slow requests, expensive PostgreSQL work, overloaded background jobs, and memory-heavy code paths. Implement the best-supported fixes and compare the result with a useful baseline.
Stabilize a risky area, upgrade Ruby on Rails and supporting infrastructure, improve coverage around change, or replace a subsystem incrementally while preserving the business rules already in production. Explore the dedicated modernization service →
Own defined product work involving Rails APIs, complex PostgreSQL data flows, GraphQL, integrations, background processing, architecture consulting, code review, or temporary technical leadership.
Share the production problem, delivery gap, or legacy area that needs attention. I’ll help identify a sensible first scope.
02 / Production evidence
Selected signals from production SaaS work—not toy projects or isolated benchmarks.
Reduced a production Rails dashboard from more than two seconds to under 200ms, alongside Sidekiq memory and crawler improvements. Read the case study.
Improved page speed, rebuilt CMS rendering, upgraded Rails and Sidekiq, and delivered integrations for an established SaaS platform serving more than one million users.
Hands-on delivery since 2016, including leading teams, shipping through CI/CD, designing APIs, managing AWS and Heroku infrastructure, and consulting directly with international clients.
03 / Relevant depth
My Rails work spans product delivery, database-heavy platforms, performance, infrastructure, and technical leadership. That range matters when the visible symptom crosses system boundaries.
Delivered education tools, financial-compliance workflows, software-supply-chain features, meeting transcription, GraphQL APIs, bulk data flows, SSO, and production optimization.
Worked on million-user SaaS, including database and application performance, a CMS rendering overhaul, SEO improvements, Rails and Sidekiq upgrades, security, and third-party integrations.
Led teams across projects, reviewed code, designed REST and GraphQL systems, set up CI/CD, and shipped web and mobile products with Rails APIs.
“Haseeb consistently approached complex technical problems with curiosity and ownership, helping us build reliable solutions in a challenging and emerging domain.”
04 / Working approach
Mature applications carry business rules, operational constraints, and history. The goal is useful progress without turning every difficult area into a rewrite proposal.
Connect the user or business impact to the code path, data model, operational context, and evidence already available.
Prioritize by impact, confidence, effort, and rollout risk; then ship reviewable code through your team’s normal workflow.
Validate the result where measurement is possible, document the trade-offs, and leave the team able to operate and extend the work.
05 / Practical details
What a consulting engagement can cover, when outside help is useful, and how I work with an existing product team.
I provide hands-on consulting for Rails performance, PostgreSQL, legacy application modernization, Ruby and Rails upgrades, APIs, integrations, background processing, architecture, code review, and defined product delivery.
A consultant can help when a production problem needs specialist investigation, a legacy area is too risky to change without expert support, an upgrade has stalled, or the team needs temporary expert engineering support for an important delivery milestone.
Yes. I favor incremental modernization that protects existing business rules: establish coverage around the area being changed, stabilize dependencies, replace risky components in stages, and keep the application deployable.
Yes. Upgrade work can cover Ruby, Rails, gems, Sidekiq, Redis, deployment infrastructure, deprecations, test failures, and application changes required to move safely between supported versions.
The engagement starts with the problem, desired outcome, constraints, and available evidence. We then agree on a focused project or contract scope. I investigate and implement through your normal review process, validate completed work where measurement is possible, and document the handoff.
Yes. I am based in Kerala, India, and work remotely with international teams. We agree on communication, timezone overlap, access, timing, and commercial terms before paid work starts.
06 / Work you can inspect
These articles and case studies expose the query plans, trade-offs, implementation details, and validation behind my Rails work.
A useful first message
Tell me what users or the team are experiencing, why it matters now, the Rails version and deployment environment, what evidence you already have, and whether you need diagnosis, implementation, or embedded expert support. I will help narrow that into a sensible first scope.
Direct access · Expert judgment · Hands-on delivery
Start with the production problem or delivery gap—not a prewritten solution.
Discuss your application