Web, mobile, backend, DevOps and AI in one delivery contour.
Kosmo Ranger / senior product engineerFast entry into moving projects, product polish and stable delivery.
I design and ship digital products that look expensive and behave calmly in production.
Senior full-stack engineer for web, mobile, backend, DevOps, automation and AI. Strong at turning scattered requirements into a coherent product contour.
Can enter a moving project fast, reduce chaos and recover control.
Works with legacy, greenfield, no-code, FlutterFlow and classic engineering stacks.
What clients usually need
Direct communication, realistic estimates and calm delivery. I can join as an executor, product-minded engineer or emergency fixer.
Portfolio command deckAlex Orlov / Kosmo Ranger
Usually replies within one working daycontact@demo.kosmoranger.ru
Mobile publishing supportGoogle Play / release support
ExpertiseProduct web platforms / Mobile apps and PWA delivery / Infra and release engineering
Expertise
Web, mobile, backend, automation, release engineering and AI in one execution contour.
The point is not to list every tool. The point is to show range, ownership and the ability to bring interface, backend and operations into one coherent system.
Web
Product web platforms
Client portals, internal dashboards, B2B systems and polished web products with strong UX and predictable delivery.
Next.jsReactSupabasePostgreSQLStripe
Mobile
Mobile apps and PWA delivery
Cross-platform mobile apps, PWA launches, release hardening and publication support from prototype to store-ready build.
FlutterPWAFirebaseSupabaseGoogle Play
DevOps
Infra and release engineering
VPS setup, reverse proxies, SSL, backups, release pipelines and the boring reliability work that keeps products alive.
DockerUbuntuNginxCI/CDCloudflare
Automation
Automation, bots and integrations
Automation layers, bots, integrations and internal workflows that reduce manual operations and speed up execution.
Pythonn8nTelegram BotsPostgreSQLREST API
AI
AI tools and assistants
AI assistants, operational copilots and business-facing tools that package LLM capability into practical workflows.
OpenAI APIPrompt SystemsRAGNo-codeFlutterFlow
Portfolio
Selected missions with actual product weight, not generic freelance screenshots.
These are demo cases, but they are structured the way strong client-facing case studies should read: clear scope, calm delivery and visible outcomes.
2025Full-stack lead
Private logistics company+38%
Dispatch Core Platform
Next.jsPostgreSQLSupabase
Built a dispatcher platform with live status boards, courier routing, SLA dashboards and role-based operations tooling.
+38%
Dispatch speed
-52%
Manual operations
-19 h/week
Ops time
2025Flutter engineer
Fitness membership startup99.6%
MoveFit Membership App
FlutterSupabaseFirebase Auth
Delivered a cross-platform membership product with schedules, QR access, push reminders and launch support.
99.6%
Crash-free sessions
+27%
Repeat sessions
10/10
Launch readiness
2024Automation architect
Agency group-74%
Agency AI Ops Layer
PythonOpenAI APIn8n
Built a workflow layer for briefs, estimates, response drafts and internal approval chains around AI-assisted operations.
-74%
Lead handling time
-11 h/day
Manual copy-work
+100%
Pipeline visibility
2024DevOps / backend engineer
SaaS founder team-63%
Cloud Relay Control Desk
DockerNginxGitHub Actions
Stabilized a release pipeline, observability stack and multi-service deployment flow for a product under active growth.
-63%
Deploy time
+4x
Incident visibility
High
Rollback confidence
Process
A delivery route that feels senior before the project even launches.
The work pattern is simple: understand the business target, remove risk early, ship visible progress quickly and leave the system easier to run than before.
01
Context and scoping
Quick discovery, business context, risk map and a realistic scope before writing unnecessary code.
02
Visible execution
Transparent milestones, early working previews and decisions explained in plain business language.
03
Release and hardening
Testing, release hardening, admin convenience and operational stability before public launch.
04
Support and growth
Documentation, handover and post-launch support so the project remains manageable after delivery.
Stack
Wide enough to move without handoffs. Disciplined enough to stay accountable.
The stack is intentionally broad: I can close interface, backend, release and automation work without splitting responsibility between five contractors.
Languages
TypeScriptJavaScriptPythonDartSQL
Frontend and mobile
Next.jsReactFlutterPWAFlutterFlow
Backend and data
Node.jsSupabasePostgreSQLREST APIAuth
Infra and release
DockerUbuntuNginxCI/CDCloudflare
AI and automation
OpenAI APIAutomationBotsNo-codeVibe coding
Mobile publishing support
I have an old Google Play developer account and can help with client app publishing by agreement, release preparation and store-ready asset handling.
This is discussed individually and only in a format that does not conflict with platform policies or ownership expectations.
We came for a website and got a stable product foundation with sane architecture, analytics and release discipline.
Dmitry Volk / Northline CommerceFast communication, clean implementation and strong engineering judgment. It felt like working with a senior product partner.
Anna Kiseleva / MoveFit StudioTrust
How collaboration tends to feel on the client side.
We came for a website and got a stable product foundation with sane architecture, analytics and release discipline.
Fast communication, clean implementation and strong engineering judgment. It felt like working with a senior product partner.
He sees weak spots early, keeps delivery calm and still moves fast. That combination is rare on freelance projects.
Need someone who can design, build, launch and stabilize the whole contour?
Direct response, realistic estimates and delivery without vanishing halfway through. If the request is urgent, mention it immediately.
Usually replies within one working day
Discuss the project
Short brief
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