Contact information

You can get this candidate's contact information from https://www.work.ua/resumes/12249736/

Work experience

Full stack software engineer

from 05.2026 to 09.2026 (5 months)
TITRO-TRADING, Київ (IT)

https://titrotrading.pro
Architected and delivered a full-scale proprietary trading platform from ground up, including
a real-time CRM, risk engine, and multi-role trader dashboard.
High-Performance Trading Engine: Engineered a real-time CFD/Forex order execution
system with sub-millisecond trade processing, supporting BUY/SELL orders, stop-loss,
take-profit, leverage management, swap accrual, and P&L calculation on 40+ live market
assets via TwelveData market data integration.
Risk Engine Architecture: Designed and built an isolated risk-engine microservice
handling automated margin calls, drawdown monitoring, trading group rules, and
position exposure limits — decoupled from the core API to ensure fault tolerance under
high concurrency.
Granular Role-Based Access Control: Implemented a custom RBAC system (Roles
PermissionActions
PermissionFields
PermissionScopes) allowing field-level and
scope-level data visibility control per role, enabling secure multi-tenant CRM operations
across Broker, Finance, Affiliate, and Support teams.
Scalable Monorepo Architecture: Structured the project as a production-grade Turborepo
monorepo (api-gateway, crm-frontend, web-frontend, risk-engine) with strict TypeScript,
enforced SOLID/GRASP principles, and shared libs/ for cross-app type safety.
→
→
→Enterprise CRM with Real-Time Trader Lifecycle Management: Built a full CRM frontend for
back-office operations — including Desk management, Campaign tracking (CPL model),
trader segmentation, KYC workflow, communication logs, and financial ticket processing
(deposits/withdrawals with multi-stage validation).
Technologies: NestJS, Next.js, React, TypeScript, PostgreSQL, MikroORM, TypeORM, Redis,
Docker, Nginx, TwelveData API, Linaria, TailwindCSS, GraphQL, REST, Turborepo

Full stack developer

from 05.2026 to 07.2026 (3 months)
BRIO:, Дистанційно (IT)

https://mybriohealth.com
Architected and delivered the MVP
for a next-generation, physician-led longevity and metabolic optimization platform.
Security First: Deployed fully HIPAA-compliant infrastructure on Microsoft Azure, utilizing
Azure Key Vault, AES-256 encryption at rest via Supabase Vault, and comprehensive PHI
audit logging.
AI-Powered Patient Experience: Engineered a custom RAG (Retrieval-Augmented
Generation) pipeline using OpenAI (GPT-4o) and pgvector to power the clinical AI
assistant, complete with strict safety guardrails.
Modern Stack: Built a lightning-fast, mobile-first frontend using Next.js & Tailwind CSS,
seamlessly connected to a Node.js/PostgreSQL backend.
Automated Ecosystem: Integrated Stripe for tiered memberships, WATI (WhatsApp API)
for concierge messaging, and external clinical APIs (Heads Up Health, DUTCH Test) for
real-time biomarker tracking—all orchestrated via complex Make workflows.
Technologies: Next.js, Tailwind CSS, Node.js, PostgreSQL, Supabase, Microsoft Azure,
OpenAI, Make, Stripe, HIPPA.

Senior associate

from 12.2025 to 04.2026 (5 months)
GLOBUS-TICKETS, Дистанційно (IT)

Senior Software Engineer | Developing a high-load

https://globus-ticket.com/en
online fiscalization system for bus transportation and ticketing.
Real-time Fiscalization: Architected a fault-tolerant Node.js microservice for real-time bus
ticket fiscalization and receipt generation, handling high concurrency.
System Reliability: Implemented comprehensive monitoring and alerting for the fiscal API,
ensuring 99.9% uptime for business-critical ticketing operations.
SSR Localization Algorithm: Engineered a dynamic server-side rendering (SSR) language
switching mechanism via Next.js, ensuring seamless multilingual user experience with
zero negative impact on SEO metrics.
AI Route Optimization (Architecture): Designed the foundational architecture for an
upcoming intelligent route distribution module, leveraging the Model Context Protocol
(MCP) for AI-driven logistics optimization.
: NestJS, PostgreSQL, Redis, Next.js, Docker, GraphQL,TypeORM, NestJS, OpenAI, VPS,
Nginx, PM2, Convex.

Web software engineer

from 08.2025 to 12.2025 (5 months)
J E N Y C L E A N, Дистанційно (IT)

https://jenyclean.com

Built a custom
CRM and booking platform for a cleaning service business to automate operations.
CRM Development: Engineered a bespoke CRM system from scratch to manage orders,
cleaners' schedules, and client databases, reducing manual dispatch time by 40%.
Booking Engine: Developed an intuitive frontend booking flow (Next.js) with integrated
payments, increasing online conversion rates by 25%.Dynamic Routing & Pricing Algorithm: Integrated Google Maps API to autonomously
calculate point-to-point transit times for cleaner schedules. Engineered a smart estimation
algorithm to dynamically calculate service duration and project costs based on specific
property metrics.
Technologies: React, Node.js, TypeORM, Stripe Integration, Google Maps API, RingCentral
API, AI Estimation Algorithms.

UI Software Engineer

from 03.2025 to 08.2025 (6 months)
TRAVELISH, Дистанційно (IT)

TICKETS.US / TRAVELISH.COM | Travel Tech Software Engineer | Enhanced core booking
functionality for US-based flight aggregation platforms using an AI-driven stack.
Multi-Domain Architecture: Engineered a scalable deployment architecture supporting a
pool of domains (Tickets.us, Travelish.com), utilizing Firebase for distributed state
management and Cloudflare R2 for optimized global asset delivery.
Multi-LLM Routing Search: Built a smart flight search engine utilizing Convex and a flexible
Multi-LLM architecture (OpenAI, Anthropic, Groq). Implemented dynamic model switching
to provide personalized itinerary suggestions, reducing query response time by 30%.
Spatial Route Visualization: Developed an interactive flight trajectory system using
Mapbox and Convex to render real-time booking routes, layovers, and waypoints based
on aggregated ticket data. Enriched geolocation context using Google Places and
Skyscanner APIs.
Advanced Security & Auth: Integrated Clerk for secure authentication and implemented a
multi-layered security protocol combining Arcjet and reCAPTCHA for robust bot
protection and API abuse prevention.
Technologies: TypeScript, Next.js, Convex, OpenAI/Anthropic/Groq, Mapbox, Clerk,
Arcjet, Firebase, Cloudflare R2, Skyscanner API, Google Places API.

Програміст Golang

from 10.2023 to 03.2025 (1 year 6 months)
Lanp, Київ (IT)

Marketplace & RBAC: Created a secure marketplace for 3 types of users, 5,000+ users,
admin errors -70%, 0 security breaches.
Performance & SEO: Optimized loading +30%, Lighthouse +25%, SEO improved, organic
traffic +25%.
User Engagement: Multilingual blog and WebSocket chat, sessions +17%, engagement
+22%, +3 languages.
Transactions & Trust: Secure authentication, transparent pricing, calendar and returns,
failed transactions -40%, retention +15%.
Technologies: TypeORM/NodeJS/Typescript/Redux/Python/C#/Docker VPS/GraphQL/
React/Git FastAPI/Nginx [open contact info](look above in the "contact info" section)

Full stack програміст

from 09.2021 to 08.2023 (2 years)
Flexreality, Харків (IT)

Poker Club Platform https://flexreality.pro
Transactional Ledger Algorithm (Chip Security): Designed a secure API "lockbox"
algorithm for real-time chip calculation and monitoring across all active poker tables. This
isolated table states, ensuring strict currency integrity and preventing race conditions or
double-spend exploits.
Security & RBAC: Developed a robust platform with 5 access roles, DDoS protection, and
strict JWT validation, achieving 0 security incidents.Performance: Optimized backend (Redis, TypeORM, PostgreSQL), increasing API
processing speed by 35% and supporting 1,000+ concurrent users seamlessly.
Mobile & Engagement: Developed a cross-platform C# application for iOS/Android,
boosting overall user engagement by 18%.
UI & Reliability: Applied SOLID principles and the Mediator Pattern, and integrated
Storybook testing, reducing frontend UI bugs by 25%.
VR Educational Platform
Interactive Learning: VR platform, retention +22%.
Real-Time Updates: JWT + Firebase, message delivery +99%.
Data Optimization: GraphQL/REST/API/Formik, interface acceleration +30%.
Technologies: Typescript/TypeORM/Docker/GraphQL/React/JSON/Nest.JS
Nginx/PostgreSQL

Back end програміст

from 05.2020 to 08.2021 (1 year 4 months)
Shareholder Profit-Sharing Platform NDA, Дистанційно (IT)

Backend developer
Profit-Sharing Engine: Engineered a secure, transactional earnings calculation engine
(NestJS) that dynamically distributes profit pools among participants based on real-time
contribution scores and role weights. Utilized Prisma $transaction to ensure absolute financial
data integrity and built a simulation module for forecasting distributions without state
mutation.
KYC & Compliance Pipeline: Architected the KYC/RBA (Know Your Customer / Risk-Based
Approach) infrastructure, integrating multiple external identity providers. Implemented a
robust state machine for profile verification with strict role-based overrides to meet stringent
FinTech regulatory requirements.
Zero Trust Architecture & RBAC: Architected a Zero Trust security model by implementing a
custom Auth & Permissions Framework (APF). Leveraged JWT, PermissionEvaluator, and
RoleResolver to continuously validate and secure multi-role access at every API boundary,
alongside global rate limiting (@nestjs/throttler) to prevent API abuse.
ISO-Compliant Audit & Governance: Developed a centralized AuditLoggerService for
immutable tracking of all business-critical actions (earnings calculations, KYC state changes)
with specific risk levels, ensuring the platform met rigorous ISO 27001 and FinTech
operational governance standards.
Testing & Infrastructure: Ensured high reliability of financial pipelines by covering calculation
logic with unit tests (Jest), and structured the application as a scalable, Dockerized ecosystem
(Docker Compose) for seamless staging and production deployments.
Technologies: TypeScript, NestJS, PostgreSQL, Prisma ORM, Docker, JWT, Zero Trust, ISO 27001,
Jest, REST APIs

Education

Міжнародний науково-технічний університет ім. академіка Ю. Бугая (МНТУ)

Комп'ютерні науки та інформаційні технології, Київ
Higher, from 2018 to 2023 (5 years)

Спеціальність для підготовки бакалаврів з найширшим охопленням дисциплін інформаційних технологій. (C#, Matlab, 3D print, Robots)

Коледж морського та річкового флоту

Бухгалтерський облiк, Київ
Specialized secondary, from 2009 to 2012 (3 years)

Бухгалтерiя та фiнанси (1С,Medok)

Additional education and certificates

Computer Science

5 рокiв
Certificate

React Redux

вересень 2020
Certificate

Javascript

вересень 2019
Certificate

Knowledge and skills

• CSS
• HTML
• JavaScript
• SASS
• Git
• Bootstrap
• React
• Adobe Photoshop
• Redux
• Figma
• Webpack
• Node.js
• TypeScript
• AJAX
• Npm
• REST API
• JSON
• Responsive design
• React Native
• Babel
• ESLint
• Adobe
• Slack
• Design
• Unit Testing
• PSD
• Python
• FastAPI
• Docker
• Nginx
• Адміністрування VPS
• SSL
• React Redux
• GitHub
• Next.js
• NestJS
• Backend-розробка
• Backend-тестування
• Розробка API
• AWS
• Node
• GraphQL
• NextJS
• Nextcloud
• C#
• CRM
• Google
• PostgreSQL
• MongoDB
• TypeORM

Language proficiencies

• English — average
• Ukrainian — fluent

Additional information

https://kotfil.space — Портфоліо Full-Stack розробник з 6+ роками досвіду створення масштабованих веб-додатків з використанням:

Мови програмування:
- JavaScript (ES6+), TypeScript, Python, C#, HTML5, CSS3, SQL.
- Front-End фреймворки та бібліотеки: React, Next.js, Vue.js, Redux (Toolkit), jQuery.
- UI компоненти та стилізація: Shadcn/UI, Material UI (MUI), Ant Design, HeroUI, Tailwind CSS, SCSS/SASS.
- Back-End розробка: Node.js, NestJS, Express, Python (FastAPI, Flask), .NET Core.
- Бази даних та кешування: PostgreSQL, MongoDB, MySQL, Redis.
- ORM та мови запитів: Prisma, TypeORM, GraphQL, Mongoose.
- DevOps та інфраструктура: Docker, Nginx, PM2, AWS (EC2, S3), адміністрування Debian/Linux, CI/CD.
- Тестування та QA: Jest, Cypress, Storybook, Unit-тестування, UI-тестування.
- Архітектура та патерни: Чиста архітектура (Clean Architecture), принципи SOLID GRASP, мікросервіси, REST API, MVC.
Інструменти та контроль версій: Git, GitHub, Webpack, Postman.