You will get a Ruby on Rails bug diagnosed and fixed
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Project details
I will diagnose and fix a focused bug in an existing Ruby on Rails application. This is suitable for production errors, broken workflows, failing background jobs, API or third-party integration issues, database-related bugs, authorization problems, and regressions after a deployment. I begin by reproducing the issue and tracing the actual cause through the code, logs, data flow, and relevant configuration. Then I make the smallest practical fix, add or update tests where the scope allows, and verify the affected path. I have 16 years of Rails experience and have worked on SaaS products, marketplaces, payments, booking systems, healthcare software, high-traffic APIs, and legacy Rails codebases. You will receive the completed fix, source changes, verification notes, and a concise explanation of what caused the problem. If the issue is larger than the purchased package, I will explain that before expanding the work.
Programming Languages
Ruby/Ruby on RailsCoding Expertise
Performance OptimizationWhat's included
| Service Tiers |
Starter
$100
|
Standard
$250
|
Advanced
$500
|
|---|---|---|---|
| Delivery Time | 2 days | 4 days | 7 days |
Number of Revisions | 1 | 2 | 3 |
Bug Investigation | |||
Fix Documentation | - | ||
Detailed Code Comments | - | - |
Frequently asked questions
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VP
Vasilis P.
Apr 29, 2022
Ruby on Rails Developer needed for a new page deployment and server password recovery.
KK
Kim K.
Aug 18, 2013
Ruby on Rails sessions
Expertly skilled contractor that completed the task when needed. Has the ability to provide solutions that better than what was expected. Comprehends the problems quickly and offers a variety of solutions. Great communications skills and easy to work with on difficult projects.
About John
Senior Ruby on Rails Engineer | SaaS, APIs, AI Automation, AWS
100%
Job Success
Athens, Greece - 10:07 am local time
I also build Rails features and automate operational workflows using APIs, webhooks, AI agents, and AWS. I have 16 years of Rails experience and 20 years building software products.
For larger work, I can join an existing codebase, make practical technical decisions, and ship without heavy supervision.
I can help with:
- Rails bug fixes, production incidents, performance work, and legacy cleanup
- New Rails features and complete product workflows
- Rails APIs, third-party integrations, and backend architecture
- PostgreSQL, Redis, Sidekiq, Hotwire/Turbo, Stimulus, and background jobs
- AWS deployments, Docker, monitoring, SSL/DNS, and server issues
- Stripe payments, marketplace flows, booking systems, and admin tools
- AI/RAG features inside existing products: embeddings, pgvector, semantic search, Bedrock, Claude, OpenAI, and LLM workflows
- AI agents and workflow automation using APIs, webhooks, MCP, Discord, Slack, and n8n
Recent work:
- Led engineering for a Rails real estate marketplace, covering architecture, delivery, and production reliability.
- Scaled a high-traffic Ruby service from 50k to 150k requests per minute ahead of Black Friday by tuning ActiveRecord connection pooling and rewriting hot-path queries.
- Built booking and mobile product flows across a Rails API, Redis-backed scheduling, Stripe, and React Native.
I prefer simple architecture, clear communication, small deliverables, reliable deployments, and code that is easy to maintain after handoff.
Steps for completing your project
After purchasing the project, send requirements so John can start the project.
Delivery time starts when John receives requirements from you.
John works on your project following the steps below.
Revisions may occur after the delivery date.
Reproduce and trace the root cause
I reproduce the issue and trace the failure through the relevant code, logs, data flow, and configuration.
Implement a focused Rails fix
I make the smallest practical change that fixes the issue without widening the scope unnecessarily.