Daniel Nistreanu
Full-Stack Developer

Crafting exceptional digital experiences with 10+ years of expertise in React, TypeScript, Node.js, and cloud technologies.

About Me

I'm a passionate Senior Full Stack Developer with over 10 years of experience building scalable web applications and leading technical teams. I specialize in modern JavaScript frameworks, cloud technologies, and creating exceptional user experiences.

Throughout my career, I've worked with major companies like Multiverse, IKEA, and British Telecommunications, delivering projects that have resulted in millions of euros in cost savings and significant performance improvements.

+40770381756
dnistreanu1@gmail.com

Key Achievements

  • 40% decrease in insurance costs through AI implementation
  • 4.6 million euros cost reduction in product recommendations
  • 2x volume of sales & 2.7x increase in traffic for eco-friendly platform
  • Mentored 20+ developers across multiple companies

Key Metrics

Numbers that reflect my commitment to excellence and growth

0+

Developers Mentored

0+

Projects Completed

0 years

Years of Experience

0+

Technologies Mastered

Technical Skills

A comprehensive toolkit built over years of hands-on experience

JavaScript

10 years

React.js

8 years

TypeScript

7.5 years

Node.js

7 years

Express.js

7 years

Next.js

5.5 years

AWS

5 years

GCP

3 years

PostgreSQL

6 years

MongoDB

6 years

CassandraDB

2 years

Redis

5 years

Docker

6 years

Kubernetes

4 years

Terraform

4 years

Jest

7 years

Playwright

4 years

React Native

3 years

GraphQL

4 years

Professional Experience

A journey through leading companies and impactful projects

Senior Full-Stack Engineer

Multiverse

London, UK11/2023 – 06/2025

AI Insurance Processor

Developed a processor for large document volumes, incorporating automatic decisions on insurance amounts, risk factors, recommended policies, and insurance approval/refusal. Improvements resulted in a 40% decrease in insurance costs. UI with heavy animations.

Next.jsNest.jstRPCCassandraDBMongoDBTypeScriptAWSExpress.jsPythonTailwind CSSGraphQLMaterialUIRedisElastic searchChart.jsRabbitMQKafkaTensorFlow

Recommended Products Engine

Developed an engine that, based on millions of database records, calculates the best recommended products—reduction in cost of 4.6 million euros. Also implemented a cleaner look to the e-commerce platform.

MicroservicesCassandraDBRedisobservability tools

Senior Full-Stack Engineer

IKEA

Helsingborg, Sweden05/2022 – 10/2023

IKEA Website Redesign

Developed redesign of the e-commerce platform and improvement to SEO results.

React.jsRedux ToolkitPlaywrightReact Testing LibraryNext.jsExpress.jsPostgreSQLAWSMongoDBElastic searchRedis

People Management Tool

Developed an internal IKEA tool that optimizes work hours of the workers per region, store, and department.

Express.jsReact.jsRabbitMQcron jobs

Technical Lead (Full-Stack)

British Telecommunications Group

London, UK11/2020 – 04/2022

BT User Portal

Developed the area of the BT website that manages user accounts, payment, data plan, promotions, etc. Complex UI, charts, diagrams, animations.

React.jsExpress.jsZustandPostgreSQLRedisStyled ComponentsMongoDBTypeScriptGraphQLAWSReact NativeChart.js

Senior Full-Stack Engineer

Cognizant

Cluj-Napoca, Romania09/2019 – 10/2020

Biggest USA Eco-Friendly Food Platform

Developed a system that finds eco-friendly alternative, well-priced products from a network of food providers like farmers and stores. Implemented the forum feature. Resulted in 2x volume of sales and 2.7x increase in traffic.

React.jsExpress.jsNode.jsRedux ToolkitCypressStyled ComponentsPostgreSQLTypeScriptElastic SearchRedisAzureKubernetes.NET legacy APIDockerSASSMaterialUI

Full-Stack Engineer

NTT DATA

Cluj-Napoca, Romania03/2018 – 08/2019

Responsive Web Development

Built fast, responsive web pages and APIs that integrated third-party services, efficiently managing large data streams. Ensured seamless communication between services by meticulously designing API endpoints and optimizing client-side interactions.

React.jsTypeScriptNode.jsASP.NET MVCMicrosoft SQLMongoDB

Full-Stack ASP.NET / React Engineer

Wirtek

Cluj-Napoca, Romania03/2017 – 02/2018

Real Estate Management System Migration

Transformed a legacy ASP.NET real estate management system into a modern React Single Page Application (SPA) for seamless hybrid deployment on Android and iOS platforms. Engineered offline workflows using PouchDB with robust synchronization logic with MS SQL.

ASP.NET MVCNode.jsReact.jsPouchDBMicrosoft SQL

ASP.NET MVC Developer

MicroBilt Corporation

Cluj-Napoca, Romania02/2016 – 02/2017

Financial Reporting Module

Developed a sophisticated reporting module that optimizes users' financing/credit score eligibility workflow by processing large amounts of documents and user info.

ASP.NET MVCJavaScriptMicrosoft SQLjQueryVue.js

QA Automation Engineer

Fortech

Cluj-Napoca, Romania08/2015 – 01/2016

Automated Testing Solutions

Created automated test solutions using Selenium and NUnit to safeguard API reliability, implement DDoS protection, and enhance overall user workflow functionality.

SeleniumC#NUnitFiddler

Featured Projects

Innovative solutions that drive business impact and technological advancement

AI Insurance Processor

Advanced document processing system with AI-powered decision making for insurance applications, risk assessment, and policy recommendations.

Impact: 40% decrease in insurance costs
Next.jsNest.jstRPCMongoDBTensorFlowRabbitMQKafkaCassandraDBTypeScriptAWS

Recommended Products Engine

Machine learning engine for product recommendations based on millions of database records with microservices architecture.

Impact: 4.6 million euros cost reduction
CassandraDBRedisMicroservicesPythonObservability

USA Eco-Friendly Food Platform

Comprehensive platform connecting consumers with eco-friendly food providers, featuring forums and advanced product discovery.

Impact: 2x volume of sales, 2.7x increase in traffic
React.jsExpress.jsPostgreSQLKubernetesDockerAzureRedisElastic Search

IKEA E-commerce Platform

Complete redesign of the e-commerce platform with improved SEO, user experience, and modern architecture.

Impact: Enhanced user experience and SEO performance
Next.jsExpress.jsPostgreSQLMongoDBPlaywrightRedux Toolkit

British Telecom User Portal

Complex user management portal with advanced charts, diagrams, animations, and multi-platform support.

Impact: Improved user account management experience
React.jsReact NativeGraphQLPostgreSQLAWSChart.js

Let's Connect

Ready to build something amazing together? Let's discuss your next project.

Email

dnistreanu1@gmail.com

Phone

+40770381756

GitHub

github.com/dnistreanu1

LinkedIn

linkedin.com/in/dnistreanu1

Send me a message