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$
USD
I will secure, debug, and optimize your laravel or elixir backend application
Gary K
About this gig
Financial applications need more than functional codethey need secure architecture.
With over 6 years of experience engineering and securing production payment systems, I provide expert-level backend optimization. I architect robust solutions that protect your data and optimize server performance.
Whether you run a high-throughput Elixir/Phoenix system or a PHP/Laravel application, I ensure your backend is fast and fortified against modern threats.
What I Deliver:
* Security Auditing: Patch logical flaws, SQLi, and XSS.
* API Hardening: Secure REST APIs with JWT auth and OAuth.
* Code Review: Enforce strict coding standards and reduce tech debt.
* Database Optimization: Tune PostgreSQL/MySQL queries for speed.
* Compliance Readiness: Align architecture with PCI DSS and ISO 27001.
My Stack: Laravel, PHP, Elixir, Phoenix, Node.js, and PostgreSQL.
Send me a message before ordering to discuss your system architecture!
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Get to know Gary K
Gary K
cyb3rk1d
- FromZambia
- Member sinceFeb 2025
- Avg. response time1 hour
Languages
English, Japanese
I help FinTechs and SaaS businesses build highly secure, scalable backend architecture.
With over 6 years of experience engineering systems and having recently served as an Information Security Officer, I don't just write functional code—I build robust payment systems aligned with ISO 27001 and PCI DSS standards.
Whether you need a high-concurrency Elixir/Phoenix multi-tenant application or a comprehensive Laravel automation platform, I deliver clean, secure, and performant solutions.
Let's fortify your infrastructure and build your next secure application.
My Portfolio
FAQ
What do you need from me to get started?
I will need access to your backend source code (usually via a GitHub, GitLab, or Bitbucket repository invite) and any existing API documentation. If we are doing live security testing, I will also need access to a staging or testing environment.
Which frameworks and languages do you specialize in?
I specialize in backend architecture using Elixir (Phoenix framework) and PHP (Laravel). I also have extensive experience working with Node.js and managing databases like PostgreSQL and MySQL for multi-tenant applications.
My application handles sensitive data. Do you sign NDAs?
Absolutely. Working in the FinTech space, I completely understand the critical nature of data privacy and proprietary source code. I am fully willing to sign a Non-Disclosure Agreement (NDA) before we discuss your system architecture.
Are you certified to handle financial or sensitive data?
Yes. I hold certifications as an ISO 27001 Lead Auditor & Implementer and a PCI DSS Practitioner. I apply these strict, enterprise-level compliance standards to every codebase I review and optimize.
Will you actually fix the bugs, or just report them?
The Basic package provides a comprehensive audit and a detailed report of vulnerabilities. If you select the Standard or Premium packages, I will not only report the issues but also actively write the code to patch critical security flaws and optimize performance.
