Services
Fractional CTO & Technical Architect
Principal Engineer + IT Architect + AI Builder. I design, build and run complex IT systems end-to-end across multiple domains: AI engineering · multi-chain DeFi · production B2B pharma SaaS · Italian public sector (PNRR / cultural heritage).
Fractional CTO · Technical Architect · AI Engineering · for production systems
01 · What I offer
Six ways to work together.
* Indicative rates · open to negotiation depending on scope, duration and required commitment.
- 01Rate: €130–220/h
Fractional / CTO-as-a-Service
Part-time CTO for startups or companies that need senior technical leadership without a full-time hire: architecture, end-to-end ownership, IT management, cost discipline.
- System architecture and technical roadmap
- Distributed-team governance and vendor selection
- Decision logs, runbooks and code-review standards
- Cost discipline on cloud and tooling
- 02Rate: €110–180/h
Technical Architect
I design complex multi-component IT systems. Microservice boundaries, schema design, deploy pipelines, documented cross-stack decisions.
- Architecture review and incremental refactoring
- Microservice boundary design
- Schema design and data modeling
- Deploy pipelines and multi-environment workflow
- 03Rate: €130–220/h
AI Engineering
I build production AI systems: agent loops with per-task tool whitelists, multi-tenant MCP gateways, custodial signing-services, code-level guardrails, production-grade prompt engineering.
- Single agent loop with per-job-type tool whitelists
- MCP gateway between LLMs and external tools (request-id correlation)
- Custodial signing-service with per-agent encrypted EOAs
- Code-level guardrails (non-bypassable SELL GUARD)
- Subscription/credit engine for autonomous agents
- QA for non-deterministic outputs
- 04Rate: €90–150/h
Database Performance Engineering
Tuning live-production MongoDB and Postgres clusters with a focus on cost discipline and zero-downtime ops.
- Cache-pressure analysis and index optimization
- Complex aggregation pipelines
- Backward-compatible schema migrations
- Hot patches under pressure
- 05Rate: €70–130/h
Process Digitalization
I map traditional processes, identify friction points and design end-to-end digital replacements with audit trails.
- Process mapping and gap analysis
- State machine design and digital workflows
- Audit trails and GDPR-aware logging
- Self-service UX and document generation
- 06Rate: €110–180/h
Web3 / Smart Contract Integration
Multi-chain (EVM + Algorand) smart-contract integration with gasless UX, account abstraction, soulbound tokens and audit-ready protocols.
- ERC-4626 vaults, EIP-7702 / ERC-7821 sponsored tx, UUPS proxies
- Soulbound tokens (ARC-19 + ERC-5192) with versioned IPFS metadata
- Cross-chain via LiFi, HTTP payments via x402
- Algorand: AlgoKit, algosdk, ARC-3/19, Pera Wallet
- Privy + Wagmi + viem stack
- Isolated signing-service with per-agent encrypted EOAs
02 · Process
How we engage
- 30 min01
Discovery call
30 minutes to align on context, goals and constraints.
- in writing02
Scope & rate
written proposal with deliverables, timeline and rate range.
- every week03
Engagement
kickoff, decision logs, weekly checkpoints, end-of-engagement handoff.
Contact
What is the next move?
A 30-minute call to understand context, goals and constraints. No commitment.
hello@andrea0x.me · @andrea0x_eth