01
Application engineering
Build and evolve application features, APIs and integrations. Work with existing domain logic, improve test coverage around the changed behavior and keep implementation choices aligned with the product.
Both Systems / Hands-on engineering for your Rails business
Ruby on Rails Consulting
Keep your Rails product moving without losing sight of the business it serves. Both Systems offers hands-on application engineering, performance investigation and carefully scoped modernization for companies building and operating Ruby on Rails software.
Discuss your Rails applicationApplication engineering · Measured changes · Direct collaboration
Your existing application is an asset—not a blank slate
A Rails product carries years of business rules, integrations and operational knowledge. Improving it means understanding that context before changing code, choosing the right intervention and making progress without treating a rewrite as the default answer.
- Product work is slowed by brittle code or gaps in the test suite.
- Slow requests, database queries or background jobs affect an important workflow.
- Ruby, Rails or dependency upgrades have become difficult to plan and deliver.
- An established application needs ongoing maintenance or targeted modernization.
/ Engagement scope
Focused Rails engineering, from diagnosis to implementation
Work is scoped around the application’s current state, the business priority and the change you need—not a generic package of hours or a promised delivery team.
02
Performance investigation
Investigate slow requests, database access and background processing using the evidence available. Identify bottlenecks, implement scoped changes and compare behavior against an agreed baseline rather than promising a fixed speed increase.
03
Ruby & Rails upgrades
Assess framework and dependency compatibility, deprecations and test coverage. Plan an upgrade sequence with validation and deployment considerations appropriate to the application.
04
Modernization & maintenance
Refactor high-friction areas, reduce unnecessary coupling and address dependency or maintenance issues incrementally. Preserve important business behavior while improving the parts that make future changes harder.
/ Potential deliverables
Working changes with a clear handover
The scope determines the deliverables. A Rails engagement can include:
- Implemented features or targeted fixes with tests for the agreed behavior.
- A performance investigation with findings, measurements and scoped improvements.
- An upgrade assessment, migration sequence or completed agreed version upgrade.
- Maintenance changes and handover notes covering decisions, validation and remaining risks.
/ How the work happens
Understand the application. Change it deliberately.
- 01
Review the context
Discuss the product, versions, deployment process and current pain points. Agree on access, scope and priorities.
- 02
Implement and validate
Work in focused increments with tests and checks suited to the change. Share progress and surface constraints early.
- 03
Hand over clearly
Document the changes and outstanding concerns. Agree on follow-up maintenance separately, subject to scope and availability.
Direct access to the founder
Work directly with Marcelo Both, founder and senior engineer at Both Systems, with approximately 20 years of experience working with international clients. The person discussing your system is the person doing the work.
Engagements are scoped to one engineer’s capacity. Scope, deliverables and availability are agreed before work begins; ongoing support is not an automatic commitment.
Founder profile (opens in a new tab)/ Start a conversation
What does your Rails application need next?
Share the Ruby and Rails versions, the main business concern and what you want to change. Include any timing or deployment constraints so the conversation can focus on a realistic engagement.
bothsistemas@gmail.comProject scope and availability are agreed before an engagement begins.
Facing a wider system design or modernization decision?
Software Architecture Consulting