Fractional CTO, tech advisory and M&A due diligence for startups, scale-ups and regulated SMBs — across Brazil, LATAM and Europe. Senior-level execution from someone who has been the founder, the CTO, and the operator. Augmented by AI at every step.
Trusted by teams across insurance, fintech and gaming
Every engagement is led personally by Rafael Aguilher da Costa — 30 years in the industry, serial co-founder, and official Anthropic partner. No handoffs to junior consultants. No opinions without accountability.
01
Executive-level technical leadership for founders navigating seed to Series B — part-time commitment, full accountability. Strategy, architecture and team-building, without the full-time hire.
02
Architecture decisions, cloud migrations and engineering turnarounds in regulated environments where compliance and availability are non-negotiable. For the scenarios most consultants avoid.
03
Technical evaluation for investors and integration execution for operators — by someone who has been on both sides of the table. Fast, thorough, and actionable well beyond a slide deck.
Since late 2023, every MMC engagement integrates generative AI into the actual workflow — research, architecture, code generation, review and documentation. We do not sell AI as a service. We use it to deliver better outcomes faster.
This means due diligence that takes days instead of weeks, migration plans produced and validated by AI then reviewed by a senior engineer, and client teams that learn to work with AI agents rather than around them.
Tools in active use
Agents scan the codebase, map vulnerable dependencies, measure accumulated tech debt, and produce an executive-ready report — while the human analyst focuses exclusively on the business blockers that actually matter.
Data pipelines, schemas, DAGs, integrations — the agent proposes the migration plan, the senior engineer validates and refines it. Less risk, significantly faster timelines, same level of human accountability throughout.
We bring AI-augmented engineering practices into the client's own team: custom commands, guardrails, automated review pipelines — calibrated to the team's actual stage of maturity, with zero tolerance for hype.
Consulting that carries real operational weight. Every claim below comes with a traceable engagement, a company, or a public outcome.
— 01
Career started with COBOL on HSBC mainframes in 1996. Today testing LLM workflows in live engineering pipelines. Rafael bridges the legacy stack of a regulated SMB and the toolchain of a Series A startup without missing a beat.
— 02
TechFront Studios — exited to MeetMe (NASDAQ: MEET). CondoConta — R$80M+ raised. This is not advisory from someone who has never had to make payroll or negotiate a term sheet under pressure.
— 03
Claude Code, Copilot, Codex, Gemini, Kiro and OpenCode are woven into research, architecture and development cycles on every engagement. The practice is transferred to client teams — without the hype that usually surrounds it.
— 04
Full LGPD compliance delivered at RD Station. ITIL, BCP/DR, CMDB and vendor management implemented in banking, insurance and healthtech environments. No improvisation where the regulator is watching.
— 05
Live migration of 60,000+ insurance contracts without a maintenance window. Engineering turnaround of a B2B fintech with ~20 engineers. Post-acquisition integration for a NASDAQ-listed company. These are the engagements that define MMC's track record.
Every engagement — whether a 5-day DD or a 12-month fractional CTO — follows the same disciplined rhythm. Clear, repeatable, accountable.
We map your current architecture, tech debt, team structure, and operational risks. AI agents accelerate the scan; the senior engineer interprets what the data actually means for your business.
Days 1–5A concrete, sequenced roadmap — not a deck full of recommendations. Priorities are set by business impact, not technical elegance. Trade-offs are made explicit and owned.
Week 2Hands-on delivery alongside your team: architecture decisions, code reviews, migration oversight, vendor coordination, and board-level reporting. Not delegated. Not observed from a distance.
Weeks 3–NEvery engagement ends with a knowledge transfer: documentation, playbooks, team upskilling and — where applicable — succession planning so your internal leadership can carry forward independently.
Final phaseI was impressed by the teams he managed to bring together. Exceptional technical capability, remarkable sense of ownership, and enormous delivery. He always merges technology and business — never treats them as separate concerns.
The migration was completed with zero downtime across our entire 60K+ contract portfolio. We honestly didn't believe it was possible until it was done. Rafael's team made it routine.
Working across a language barrier with a Brazilian partner on a critical data-infrastructure project was a real concern. Seven months later, Snowflake was running and the pipelines were cleaner than anything we'd had before.
How senior engineers can use Claude Code not as a code-completion shortcut but as a genuine collaborative system — for architecture, refactoring, documentation and review cycles. A practical field guide from eight months of live usage across MMC engagements.
27 Jun 2026
The structure, the agents, the human checkpoints, and the output format that makes an M&A technical assessment genuinely useful — rather than just comprehensive.
April 2026
A case-driven look at the architectural decisions, rollback strategies and live-traffic patterns that made a 60K+ contract migration possible without a maintenance window.
January 2026
If you have a tech challenge that genuinely matters — a migration that has to work, a DD with a tight deadline, a product that needs an engineering leader — reach out. No discovery call scripts, no automated sequences.
