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Both Systems
Founder-led software engineering

Both Systems

Senior thinking. Practical software.

A boutique consultancy for architecture, platforms and applied AI. Work directly with the founder — one senior engineer with approximately 20 years of experience working with international clients.

Discuss a projectExplore services
Founder-led

Direct collaboration

~20 years

Engineering experience

International

Client experience

Focused

Project-based consulting

/ Engineering services

From technical decisions to working software

Focused engagements shaped around your product, constraints and priorities — with hands-on senior engineering.

01

Software Engineering & Architecture

Architecture reviews, system design and hands-on engineering for maintainable software.

  • System design
  • Architecture
  • Engineering
Software Architecture Consulting
02

Platform Engineering & Modernization

Improve developer workflows, evolve existing platforms and modernize legacy systems incrementally.

  • Platforms
  • Developer experience
  • Modernization
03

AI Engineering & Integrations

Connect language models to your knowledge and workflows with RAG, agents and Model Context Protocol (MCP).

  • RAG
  • Agents
  • MCP
04

Technical Consulting

An independent senior perspective on technical choices, delivery risks and the next steps for your product.

  • Technical reviews
  • Roadmaps
  • Advisory
05

Custom Software Development

Purpose-built web systems, mobile applications and integrations for specific business needs.

  • Web & mobile
  • APIs
  • Integrations
Ruby on Rails Consulting
/ Applied AI

AI grounded in your business

Practical integrations, not AI for its own sake. Start with the use case, connect the right context and evaluate the results.

  • Knowledge with RAG

    Retrieve relevant information from your documents and internal knowledge.

  • Agents & MCP integrations

    Connect tools, data sources and workflows with explicit boundaries.

  • Evaluation & iteration

    Assess quality, reliability and trade-offs before extending the solution.

both-agent · conceptual workflow
// an integration pattern
question → retrieve relevant context
context + model → grounded response
tools via MCP → controlled actions
/ Independent products

Products alongside the consultancy

Separate product initiatives, with their own scope and development status.

Kiveli

Family management · Mobile

MVP in development

A family management mobile app. The MVP is currently in development; no public download is available here.

  • Family
  • Mobile
  • MVP

Mentalist

Course organization · macOS

Availability not announced

A private, local macOS course organizer with Obsidian and Notion integration. Public availability has not been announced.

  • Local & private
  • Obsidian
  • Notion
/ Direct collaboration

Work with the engineer doing the work

Both Systems is currently a one-person, founder-led consultancy. Engagements are scoped to the founder’s capacity — not an existing delivery team or a guaranteed staff augmentation offering.

  1. 01 —

    Understand

    Discuss the problem, constraints and desired outcome directly with the founder.

  2. 02 —

    Define

    Agree on a realistic scope, technical direction and engagement model.

  3. 03 —

    Build

    Work in focused increments with clear communication and practical feedback.

  4. 04 —

    Review

    Evaluate the result and agree on handover or further work where appropriate.

/ Founder

Marcelo Both

Founder and senior engineer at Both Systems. Approximately 20 years working with international clients across architecture, platforms and applied AI.

/ Start a conversation

Let’s discuss your project

Architecture question, modernization challenge or a new product? Share your context, current constraints and what you want to achieve.

/ Email

bothsistemas@gmail.com

Project scope and availability are agreed before an engagement begins.