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Mihalache Sebastian

@mihalachesebastian

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Senior Fullstack Developer, specializing in web and mobile solutions.

Romania

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What I'm looking for

I am looking for opportunities to innovate and lead projects that drive growth and enhance user experiences in a dynamic and collaborative environment.

I am a Senior Javascript Developer with extensive experience in building scalable web and mobile applications. My journey has taken me through various roles, from Fullstack Developer to Lead Software Engineer, where I have successfully architected and implemented custom solutions for diverse industries, including e-commerce and urban mobility.

Throughout my career, I have demonstrated a passion for transforming bold startup ideas into powerful SaaS solutions. I thrive in collaborative environments, working closely with stakeholders to align technical execution with business goals. My expertise in full-stack development, combined with a strong focus on user experience, has enabled me to deliver impactful results, such as reducing trip planning time by 90% and increasing revenue by 18% through innovative applications.

Experience

Work history, roles, and key accomplishments

Current

Lead Software Engineer

Current

Komoder

Aug 2024 - Present (10 months)

Developed a fully customized e-commerce solution for a company specializing in luxury massage chairs, handling the entire engineering process from scratch while collaborating closely with the CEO in a self-managed
role.
• Architected and implemented a scalable and high-performance platform tailored for high-end clientele.
• Integrated payment solutions and a secure backend.

JavaScript User Experience Design Payment Integration SaaS Security Performance Optimization

Web3 Engineer

Fluid Trends

Nov 2022 - Mar 2024 (1 year 4 months)

The client required a comprehensive NFT ecosystem, including a blockchain dashboard for managing Non-Fungible Tokens (NFTs), map and a mobile application for seamless event check-ins.

• Enabled secure and efficient NFT interactions by integrating wallet connectivity.
• Optimized geolocation-based events with map capable of rendering 100,000+ event markers.

NFT Blockchain Mobile Application Development Gamification User Engagement Event Management Next.js NodeJS Microservices Docker

Fullstack Developer

Rastel.io

Jan 2022 - Jan 2023 (1 year)

Developed and deployed secure, tech-enabled bicycle parking solutions to promote sustainable urban mobility across multiple cities in Europe.
• Increased bicycle parking availability by 3x through the deployment of smart.
• Reduced bike theft incidents by 40% by integrating secure locking and real-time monitoring systems.
• Optimized urban mobility infrastructure.

IoT Mobile Application Development Security Systems Collaboration

Fullstack Developer

TeamAssemble

Sep 2022 - Dec 2022 (3 months)

Companies organising team off-sites struggled with high travel costs.
They needed a tool to estimate and compare travel expenses efficiently, saving time and budget while accommodating diverse team preferences.
• Reduced trip planning time by 90% by building an automated cost estimation platform that compares flights and hotels for teams of up to 3,000 people.

React Next.js Cost Estimation Real Time Pricing SaaS

Senior Frontend Engineer

Mindera

Jan 2021 - Jun 2021 (5 months)

Worked on optimizing the checkout process for an online retail store, improving efficiency and user experience significantly.

Frontend Development Team Collaboration JavaScript User Experience

Principal Engineer

ROOM

Nov 2020 - Nov 2022 (2 years)

Designed and implemented a comprehensive IoT system for optimizing office space utilization, increasing sales opportunities and revenue through a custom analytics dashboard.

IoT Analytics Mobile Application Development Revenue User Experience