Transparent pricing and granular technical scope. No blind contact forms, no inflated estimates, and uncompromised forensic rigor.
We engineer critical systems from first principles or modernize legacy architectures under a fixed-price proposal with exact deliverables.
Technical software engineering and security hours without recurring monthly fees. Flexible consumption on-demand for development, automation, or hardening.
Ideal for targeted security code reviews, host hardening, or bespoke automation scripts.
Designed for complex API integrations, data process automation, or quarterly technical support.
Maximum flexibility for database performance bottlenecks, architectural refactoring, and senior advisory.
Manual audit of mission-critical Pull Requests prior to production releases to validate authentication logic and payment flows.
Hardening Linux hosts, strict firewalling (iptables/UFW), SSH bastioning, and Docker container isolation.
Building high-performance data pipelines, webhook automation, and custom integration scripts to eradicate manual work.
Integrating payment gateways (Stripe/Redsys), Passkeys authentication, or third-party APIs without hiring full-time staff.
Refactoring slow SQL queries, remediating legacy code debt, and mitigating high-concurrency race conditions.
Designing robust cryptographic schemes, secure database encryption at rest, and deterministic software architectures.
Transparent answers to operational, contractual, and legal questions regarding our engineering services.
Yes, completely and without fine print. The Full-Stack Audit encompasses the entire scope of the Web & API Audit (up to 20 endpoints or critical business flows in grey or black-box mode) combined with full static and dynamic testing of the mobile app (iOS and Android), binary reverse engineering, SSL pinning validation, and local storage leakage analysis.
Every engagement begins with the execution of a strict non-disclosure agreement (NDA) and formal Rules of Engagement (RoE). This document legally and technically defines authorized target IPs, domains, testing windows, and operational redlines to ensure intrusive testing never disrupts production business operations.
Upon delivery of the initial forensic report with reproducible Proofs of Concept (PoCs), your development team has a 30-calendar-day window to apply remediations. Once notified, Synthex re-executes attack vectors against those specific vulnerabilities at no extra charge, issuing a final verified remediation report.
In Flex Packs, hours remain valid for 3 to 6 months with zero recurring monthly fees, consumed flexibly at your own pace. In monthly retainers, a rollover clause automatically transfers up to 50% of unused hours into the following month, ensuring your investment is never wasted during development slowdowns.
Synthex prioritizes uncompromised engineering quality and commitments to existing retainers. On-Demand mode is not automatically accepted: we evaluate technical feasibility, problem scope, and team bandwidth before accepting any ad-hoc intervention to guarantee exceptional execution.
All stated rates are net (+ applicable statutory VAT). For EU businesses registered under the VIES VAT validation system outside Spain, invoices are issued zero-rated for VAT under the cross-border reverse charge mechanism.
Synthex issues independent technical forensic diagnostic reports, remediation master plans, and adequacy audits. Under applicable EU and national legislation (Regulation EC 765/2008 and Spanish Industry Law 21/1992), official accredited certificates under standards such as ISO 27001 or ENS are legally reserved for accredited Certification Bodies under ISO/IEC 17021. Our deliverables constitute forensic engineering assessments and high-fidelity diagnostic audits, not regulated certifications.