You will get I will fix slow APIs, high CPU usage, and optimize your backend performance
Project details
Slow system? High CPU? Users complaining? I diagnose and fix backend performance issues fast.
If your app is slow, crashing, or consuming too much CPU, you don’t need a rewrite you need the right diagnosis.
I specialize in fixing:
• High CPU usage
• Slow APIs and database queries
• N+1 query problems
• Memory leaks and inefficient jobs
I work with:
• MySQL query optimization
• Redis caching
• Backend profiling & bottleneck detection
Not sure which service fits your needs?
Send me a message I’ll quickly assess your system and suggest the right solution.
If your app is slow, crashing, or consuming too much CPU, you don’t need a rewrite you need the right diagnosis.
I specialize in fixing:
• High CPU usage
• Slow APIs and database queries
• N+1 query problems
• Memory leaks and inefficient jobs
I work with:
• MySQL query optimization
• Redis caching
• Backend profiling & bottleneck detection
Not sure which service fits your needs?
Send me a message I’ll quickly assess your system and suggest the right solution.
Programming Languages
PHP, JavaScript, GoCoding Expertise
Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$150
|
Standard
$400
|
Advanced
$900
|
|---|---|---|---|
| Delivery Time | 1 day | 1 day | 1 day |
Number of Revisions | 0 | 1 | 2 |
Bug Investigation | |||
Fix Documentation | |||
Detailed Code Comments | - | - | - |
Optional add-ons
You can add these on the next page.
Additional Revision
+$50Frequently asked questions
2 reviews
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MA
Mike A.
Jun 23, 2021
Looking for a pro in Php, Html, Api Key
Jonathan is a true Professional, Trust worthy, understands the tasks very well and offer solutions. Open minded, great skills in communication.
I would strongly recommend Jonathan for anyone looking for his services.
I would strongly recommend Jonathan for anyone looking for his services.
DO
Dominic O.
Apr 16, 2020
Looking for PHP Codeigniter and Wordpress developer and more
Jonathan took a task and completed it in 1/10th the time that others estimates/quoted. Very efficient. Communication was great throughout. Much appreciation for this guy.
About Jonathan
Fractional CTO for Startups | Cloud Architecture & Tech Strategy
Mandaluyong City, Philippines - 4:20 pm local time
For 5 years I served as Co-Founder and CTO of a startup, where I owned the company's entire technology direction: architecture, infrastructure, engineering hires, vendor decisions, budgeting, and long-term technical strategy. Before that, I spent 10+ years as a software engineer building production systems — loyalty platforms, custom CRMs, product information systems, digital wallets — for businesses ranging from small companies to large enterprises.
I've since brought that same fractional-CTO function to other founders on Upwork: stepping in to make architecture calls, run technical due diligence, and lead engineering direction for companies that need senior technical leadership but aren't ready to hire one in-house full-time.
Fractional CTO Services
Technology roadmap planning
• Software architecture reviews & technical due diligence
• Product technical planning
• Engineering team leadership & developer mentoring
• Vendor evaluation and selection
• Cost optimization & infrastructure planning
• Risk assessment & production incident response
• Startup technology consulting
When hands-on execution is needed, I can also lead or build:
Backend Engineering
• Laravel, Go, Node.js backend development
• REST APIs and microservices
• Database optimization (MySQL & PostgreSQL)
• Redis caching and queue systems
• Payment gateway integration
• Scalable application architecture
Cloud & Infrastructure
• Linux server administration
• AWS, DigitalOcean, UpCloud, Hetzner VPS deployment
• Nginx, security hardening, CI/CD pipelines
• Backup, disaster recovery, high-availability infrastructure
Monitoring & Production Reliability
• Grafana, Prometheus, OpenTelemetry, Sentry
• Root cause analysis and performance tuning
• Production incident response
Why clients work with me
I bring both engineering execution and executive judgment. I've spent years making the calls that directly affect a company's cost, growth, and stability — not just writing the code, but deciding what should be built, when to rebuild, and when to hold the line. When you work with me, you get someone who can think like an engineer, an architect, and a CTO.
Tech Stack
Languages & Frameworks: Go, PHP, Node.js, TypeScript
Databases: MySQL, PostgreSQL, Redis
Infrastructure: Linux, AWS, DigitalOcean, UpCloud, Hetzner, Nginx
Observability: Grafana, Prometheus, OpenTelemetry, Sentry
Ideal Clients
• Founders looking for a Fractional CTO
• SaaS startups and growing technology companies
• Teams that need senior technical leadership without hiring a full-time executive
• Businesses modernizing legacy systems or scaling past their current architecture
Steps for completing your project
After purchasing the project, send requirements so Jonathan can start the project.
Delivery time starts when Jonathan receives requirements from you.
Jonathan works on your project following the steps below.
Revisions may occur after the delivery date.
Initial Assessment & Access Setup
Review your issue and gather requirements. Secure access to server, database, and codebase
Deep Diagnosis & Root Cause Analysis
Analyze logs, performance metrics, and queries. Identify bottlenecks, crashes, or misconfigurations