Tetiana Nahorna
Offer Tetiana work on your next project.
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Offer work 
Kyiv,
Ukraine
8 hours 51 minutes back
available for hire
1 client
on the service 2 months 25 days
Rating
Successful projects
Average rating
Language proficiency level
Українська: fluent
English: advanced
한국어: advanced
CV
I am a Senior Full-Stack Developer with over 6 years of experience building scalable web applications, backend systems, and complex software solutions.
I specialize in high-performance API development, SaaS platforms, automation systems, dashboards, and distributed services. My main technologies include TypeScript, Node.js, React, Next.js, PostgreSQL, Docker, and cloud infrastructure.
I focus on clean architecture, performance optimization, and building reliable systems that scale well in production.
I can quickly adapt to existing projects or build complex systems from scratch. Open to both short-term projects and long-term collaboration.
Skills and abilities
Programming
Design & art
Portfolio
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AI Code Review Command Center
AI & Machine Learning
A modern GitHub code intelligence platform that analyzes pull requests, detects risks, and provides AI-driven insights for faster and safer development workflows.
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Distributed Job Processing Platform
Web Programming
Distributed Job Processing Platform with Real-Time Operational Dashboard
This project delivers a fault-tolerant backend system for managing background tasks across distributed environments. It features a real-time monitoring dashboard that provides live visibility into queues, workers, retries, and recovery processes.
… Key Technologies:
#golang #redis #postgresql #websocket #dashboard #backend #distributed-systems
Core Features:
Task queue orchestration with support for delayed jobs and retry logic
Worker coordination and heartbeat tracking
Scheduler for recurring and deferred tasks
Redis-based event bus for internal messaging
PostgreSQL persistence layer for job state and metadata
RESTful API for full job lifecycle management
Real-time dashboard with live transport via WebSocket/SSE
Observability layer for queue health, worker status, and execution metrics
This project showcases expertise in building resilient backend architectures, handling concurrency, orchestrating distributed queues, coordinating services, and designing production-grade dashboard interfaces.
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ProfitOps — Margin & Risk Intelligence Platform
Web Programming
ProfitOps is a margin and profit intelligence platform designed for ecommerce operators. The system monitors contribution profit, true profit, CAC dynamics, refund pressure, and operational risk in real time. I built a predictive alert engine that detects margin compression, revenue exposure, and profit instability before they compound. The platform simulates live business scenarios, including growth, risk, and recovery phases, with dynamic data and automated signal generation.
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Ecommerce Profit Intelligence Dashboard
Web Programming
I designed and developed a custom ecommerce Revenue and Profit Intelligence system focused on real contribution profitability rather than vanity revenue metrics. The client needed visibility into true profit after refunds, cost of goods, shipping, payment fees, and marketing spend. Standard platform reports were not sufficient for decision making. The system includes: True Profit and Margin tracking, Channel level profitability analysis, Product and channel profit matrix, Revenue and Profit waterfall breakdown, True ROAS calculation, Refund impact analysis, Scenario based forecasting, Executive level overview with drill downs, CSV and API based data ingestion. The main challenge was building a clean financial data model that accurately allocates marketing spend and operational costs across products and channels. The final result is a decision grade analytics dashboard that enables rapid identification of profit leaks and supports strategic growth planning.
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SaaS Metrics & Revenue Intelligence Platform
Web Programming
I designed and built a production-ready SaaS revenue intelligence platform focused on subscription analytics, retention modeling, and growth forecasting. The system provides CEO-level insights beyond static reporting and transforms raw transactional data into strategic business metrics. Core features include full MRR decomposition (New, Expansion, Contraction, Churned MRR), ARR, NRR, GRR, ARPA, CAC, LTV, and LTV:CAC. All metrics are calculated server-side from live database records with strict multi-tenant isolation and real-time recalculation. The platform includes an MRR Waterfall view for revenue reconciliation, cohort retention analysis, activation funnel tracking, and a 6–12 month MRR forecast engine based on historical churn and expansion rates. A Simulation Mode allows sandbox scenario planning without modifying production data. Additional features include KPI drill-down breakdowns, CSV import with validation, webhook-ready ingestion endpoints, data health monitoring, caching with invalidation, and role-based access control. The project was engineered with scalability and correctness in mind, ensuring accurate financial modeling and investor-ready reporting.
Reviews and compliments on completed projects 1
Quality
Professionalism
Cost
Contactability
Deadlines
Communication: 10/10
- Excellent communication throughout the project
- Responded quickly to questions
- Well understood the requirements and wanted to satisfy the client
- Proactively offered solution options
Technical execution: 2/5
- The task was not technically resolved
- The result does not meet expectations
- Issues with the working methodology
Overall rating: 3/5
- Good communicator, but weak designer
- For future projects, clearer requirements and checkpoints should be provided
Recommendation: Can be engaged for simple, clearly defined tasks with detailed specifications
| Activity
| Latest proposals 10 | Budget | Added | Deadlines | Proposal | |
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Speed up the loading of the OpenCart website.
99 USD
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Develop 10-15 different landing pages (trading) NOW
120 USD
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A simple web application for online booking at a barbershop needs to be developed.
609 USD
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Eliminate the reasons for the site's non-indexing.
79 USD
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Modern Brand Identity Logo
1150 USD
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Wordpress Landing on Elementor
397 USD
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Transfer 3 websites from one hosting to another
113 USD
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Technical update and refinement of the website, launch the website.
99 USD
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Bug fixes in Python automation for uploading videos to YouTube
226 USD
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Creation of a business card website for a culinary studio
609 USD
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