Diogo Peralta Cordeiro

Freelance services

Careful engineering for a bounded problem.

Freelancing is a side activity for me. I take on one small engagement at a time, keep the scope clear and work directly with the person responsible for the result.

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Services and prices

A short menu, with the outcome written down first.

Prices exclude VAT where applicable. Scope, deliverables, access and timing are agreed before work begins.

Prefer a platform-managed contract and payment? View my services on Contra.

€650 fixed scope

PHP / Symfony codebase review

A focused look at one codebase or subsystem, ending with a short report you can act on rather than a long list of abstract concerns.

What you receive

  • Up to 6 hours of review
  • Architecture, maintainability and risk findings
  • Prioritised report and 45-minute handover

Good fit: An inherited application, a difficult subsystem or a decision about what to repair first.

Ask about this service on WhatsApp

€850 fixed scope

Linux reliability and backup review

A practical review of one deployment or small server estate, centred on whether it can be maintained and recovered when something goes wrong.

What you receive

  • Deployment, backups and restore path
  • Access, updates, logs and monitoring
  • Written recovery and hardening plan

Good fit: A small production service, self-hosted stack or server whose recovery path has never been tested carefully.

Ask about this service on WhatsApp

€1,350 fixed scope

Architecture and roadmap sprint

Turn an unclear product idea or inherited system into explicit technical decisions, boundaries and a delivery sequence.

What you receive

  • Requirements and system-boundary review
  • Options, trade-offs and recommendation
  • Roadmap, risks and acceptance criteria

Good fit: A product before a rebuild, a new internal tool or a team that needs a written technical direction.

Ask about this service on WhatsApp

€80/hour 8-hour minimum

Selected implementation work

Hands-on PHP, Symfony, SQL, automation or internal-tool work once the problem and the existing system are understood.

What you receive

  • One small engagement at a time
  • Visible milestones and direct communication
  • Documentation and a clean handover

Good fit: A contained feature, integration, migration or repair with a useful finish line.

Ask about this service on WhatsApp

Relevant work

The services come from work I already do.

A few concrete starting points from the wider project archive.

PHP · Symfony · open source

GNU social

Long-term ownership across architecture, ActivityPub interoperability, accessibility, releases and contributor support.

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Internal tools · product delivery

Operational software

Business constraints translated into data models, backend logic, admin workflows, reports and maintainable documentation.

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Linux · recovery · dependable systems

Systems that have to keep working

Experience with long-running Linux services, backups, recovery, embedded constraints and written operational decisions.

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How it works

Four straightforward steps.

A small project still benefits from a clear outcome, written assumptions and a clean handover.

  1. Fit check A short call or written brief.
  2. Scope Outcome, price and timing.
  3. Delivery Visible, reviewable milestones.
  4. Handover Documentation and agreed support.

Start with the problem

Send me the context and the finish line.

A standalone 60-minute consultation is €120. The initial 20-minute fit check is free.

Contact me on WhatsApp Other contact methods

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