Artem

Artem Kaluhin
* Remote, Europe # [open contact info](look above in the "contact info" section)
§ github.com/artemkaluhin
PROFESSIONAL SUMMARY
Fullstack Developer with 3 years of experience building web applications using Node.js, TypeScript,
PHP (Magento, Laravel), React, and PostgreSQL. Proven ability to deliver e-commerce platforms,
CRM systems, and internal tools from concept to production. Strong background in REST API
design, database modelling, and cloud deployment (AWS). Passionate about clean code, performance
optimisation, and solving real business problems with pragmatic engineering.
TECHNICAL SKILLS
Languages TypeScript, JavaScript, PHP, SQL, Python, Kotlin
Backend Node.js, NestJS, Express.js, Laravel, REST, GraphQL, WebSockets,
OAuth2
Frontend React, Next.js, Vue.js, Redux, Zustand, Tailwind CSS, Material UI,
Blade
Data & Cloud PostgreSQL, MySQL, MongoDB, Redis, AWS (Lambda, SQS, S3, Cloud-
Front), Docker, CI/CD
Tools & Practices Git, Agile, Jest, PHPUnit, API validation, code review, architecture
design
WORK EXPERIENCE
Halolab Dec 2025 – Mar 2026
Full-Stack Developer Remote
•Designed and built a server-side IoT backend from scratch using NestJS, TypeScript, and PostgreSQL,
including OAuth2 social authentication via Google and Apple.
•Engineered a real-time metrics ingestion pipeline for high-frequency Bluetooth sensor data, designing
a PostgreSQL time-series schema with efficient read and write patterns.
•Implemented a Redis caching and session-management layer for frequently accessed sensor telemetry
data.
•Integrated the IoT platform with external REST APIs and built internal dashboards using React.

NovaTech Solutions LTD Aug 2023 – Oct 2025
Full-Stack Developer Remote
•Built an EdTech language learning platform with spaced repetition, progress tracking, and adaptive
vocabulary retention using Node.js, Express, TypeScript, React, Next.js, and PostgreSQL.
•Added Redis caching and optimised PostgreSQL queries for leaderboard and analytics endpoints.
•Architected a serverless AWS pipeline using Lambda, SQS, S3, and DynamoDB for automated in-
vestment report generation with retry logic and queue-based reliability.
•Developed a Laravel-based internal admin panel for managing content, users, and subscription plans,
integrating it with the main Node.js API via REST.

Meridian Digital Works Jan 2022 – Apr 2023
Full-Stack Developer Remote Contract
•Developed a full-featured e-commerce platform using Node.js, Express, React, PostgreSQL, and
PHP/Laravel for payment and order microservices.
•Implemented product catalog, shopping cart, checkout flow, order management, and customer ac-
counts with role-based access.
•Integrated payment gateways (Stripe, PayPal) and shipping providers via REST APIs; built webhook
handlers for real-time status updates.
•Optimised database queries and added Redis caching for product listings and session storage, reducing
page load time by 35%.
•Built a Laravel-based reporting module for sales analytics and inventory tracking, exposed via REST
API to the React frontend.

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PERSONAL PROJECTS

Auto Service Marketplace & CRM Platform
• Architected a full-stack two-sided marketplace and subscription CRM connecting car owners with
repair shops, using Laravel, Vue.js, PostgreSQL with PostGIS for geo-search, and Redis,
supporting real-time availability via Laravel Echo / WebSockets across 4 languages.
• Built a concurrency-safe slot booking system using PostgreSQL advisory locks to prevent double-
booking, and a double-blind price confirmation mechanism to eliminate post-repair pricing disputes
between clients and shops.
• Integrated Stripe for one-time, deposit, and recurring payments with webhook signature verification
and idempotent retry handling, alongside Cloudflare R2 object storage (via Laravel Flysystem) and
Resend transactional email.
DeFi Arbitrage Monitoring Platform
• Developed Web3 monitoring service using NestJS, WebSocket, Web3.js, and Ethers.js to track token
price differences across CEX and EVM liquidity sources with configurable arbitrage signals and Redis
market snapshots.
• Created Solidity smart contract prototypes with Hardhat, integrated MetaMask for wallet connec-
tivity, and implemented PostgreSQL historical tracking with fallback handling for RPC and API
failures.
EDUCATION
University of the West of England Bristol, UK
BSc Computer Science, Upper Second-Class Honours 2023 – 2025
Relevant coursework: Database Systems, Data Structures and Algorithms, Web Development.
Kaplan International Pathways Bristol, UK
Foundation Programme 2022 – 2023
Relevant coursework: Artificial Intelligence, Programming in C/C++, Web Programming.
LANGUAGES
English: C1 – Professional Working Proficiency Ukrainian: Native Polish: B1 (Intermediate)

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