You will get Async senior engineer triage - production system review
Project details
A senior backend engineer reviews your production system and delivers a written diagnostic memo. No calls, no scheduling, no video - 100% async.
You get a PDF report with a severity assessment, the 2–3 most likely root causes, a recommended next step with an effort estimate, and what I'd specifically NOT worry about right now (saving you money is high-trust work).
What sets this apart:
• 100% async. No Zoom, no time zones, no scheduling friction.
• Written record you can share with co-founders or engineers.
• 15+ years of production backend experience.
• Specialized: AWS + Node.js + PHP + MySQL.
• Severity-tagged findings make the next step obvious.
• Pro tier includes a mermaid architecture diagram + 30-day async remediation review window.
A note on "Revisions": Upwork's field labels them Revisions, but you actually get rounds of follow-up Q&A in the chat. I don't iterate on the memo wording - the analysis is the analysis. Each round lets you dig deeper: "what does X mean", "expand on root cause #2", "clarify the next-step recommendation".
Delivery: PDF via Upwork files. Yours to keep, share, reference.
You get a PDF report with a severity assessment, the 2–3 most likely root causes, a recommended next step with an effort estimate, and what I'd specifically NOT worry about right now (saving you money is high-trust work).
What sets this apart:
• 100% async. No Zoom, no time zones, no scheduling friction.
• Written record you can share with co-founders or engineers.
• 15+ years of production backend experience.
• Specialized: AWS + Node.js + PHP + MySQL.
• Severity-tagged findings make the next step obvious.
• Pro tier includes a mermaid architecture diagram + 30-day async remediation review window.
A note on "Revisions": Upwork's field labels them Revisions, but you actually get rounds of follow-up Q&A in the chat. I don't iterate on the memo wording - the analysis is the analysis. Each round lets you dig deeper: "what does X mean", "expand on root cause #2", "clarify the next-step recommendation".
Delivery: PDF via Upwork files. Yours to keep, share, reference.
Programming Languages
PHP, JavaScript, TypeScriptCoding Expertise
Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$150
|
Standard
$250
|
Advanced
$450
|
|---|---|---|---|
| Delivery Time | 2 days | 2 days | 3 days |
Number of Revisions | 1 | 2 | 5 |
Number of Pages | 1 | 2 | 3 |
Design Customization | - | - | - |
Content Upload | - | - | - |
Responsive Design | - | - | - |
Source Code | - | - | - |
Optional add-ons
You can add these on the next page.
Fast Delivery
+$75 - $150Frequently asked questions
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SM
Sergio M.
May 4, 2026
Senior Backend Engineer (Node.js + AWS) – API, Infrastructure & System Reliability
SM
Sergio M.
Apr 23, 2026
Senior Backend Engineer (Node.js + AWS) – API, Infrastructure & System Reliability
Olga delivered an outstanding backend and infrastructure audit that exceeded expectations in both depth and clarity. She quickly understood a complex system involving Node.js, AWS, and mobile integrations, and was able to reconstruct the architecture with impressive accuracy.
Her report was not just a surface-level review — it included clear identification of key issues, root causes, and a well-structured, prioritized execution plan. This level of insight is extremely valuable, especially in systems where stability and scalability are critical.
Communication was smooth, professional, and efficient throughout the entire process. Olga demonstrated strong ownership, technical expertise, and a results-driven mindset.
I would confidently recommend her to anyone looking for a high-level backend or infrastructure expert, and I look forward to working with her again on future milestones.
Her report was not just a surface-level review — it included clear identification of key issues, root causes, and a well-structured, prioritized execution plan. This level of insight is extremely valuable, especially in systems where stability and scalability are critical.
Communication was smooth, professional, and efficient throughout the entire process. Olga demonstrated strong ownership, technical expertise, and a results-driven mindset.
I would confidently recommend her to anyone looking for a high-level backend or infrastructure expert, and I look forward to working with her again on future milestones.
About Olha
Production Backend Audit | Node.js & AWS | Reliability, Auth, Recovery
Kyiv, Ukraine - 2:03 pm local time
I audit production backends. Independent review before scaling, fundraising, due diligence, or vendor handover.
15+ years in production engineering on Node.js and AWS, focused on multi-tenant SaaS, high-load systems, and AI-integrated platforms. Most engagements: a system has been built (sometimes by an internal team, sometimes by an agency, sometimes by AI tools), and someone now needs a clear-eyed read of what is actually there before the next decision is made.
I'm usually brought in when:
- A board or acquirer has asked for an independent technical assessment
- An agency or contractor has handed over and the new team needs an honest map
- A founder is preparing for due diligence and wants to know what's already wrong
- A team is about to scale (or has just scaled) and wants to find what breaks first
- An AI-built MVP is going to paying customers and needs a senior read
No guesswork. No random fixes. Clear outcomes.
Selected experience:
- Multi-tenant SaaS platforms with RBAC and complex data models
- Node.js (NestJS) backend systems with microservices architecture
- Production AWS systems with serverless workloads, async processing, and operational recovery under real production load
- API-heavy systems with 3rd-party integrations and async processing
- Legacy system cleanup, architecture reconstruction, and refactoring into maintainable structures
Each engagement ends in a written report: findings ranked by blast radius, with severity, evidence, fix, effort, and recommended remediation tracks. The deliverable is written for a founder, board, or acquirer to act on, not for an engineer to read.
The five-day audit is typically the starting shape. Stabilization or a longer engagement can follow if both sides agree it is useful.
Kyiv-based. Working with teams in the US, UK, DACH, and the Nordics. English delivery, your hours.
Steps for completing your project
After purchasing the project, send requirements so Olha can start the project.
Delivery time starts when Olha receives requirements from you.
Olha works on your project following the steps below.
Revisions may occur after the delivery date.
Send you the intake form
Within 4 hours of purchase, I'll reply in the Upwork chat with a short, structured intake form covering the stack, concerns, history, and what success looks like. About 15 minutes of your time.
You send back the intake answers
Reply in the chat with your answers plus any artifacts you can share (architecture diagram, logs, screenshots). No specific format required - write in your own words.