Available to hire
Hi, I’m Nagy Arnold, a Senior Software Engineer with 10 years of experience working across the entire software development lifecycle. I specialize in building robust systems using Node.js, Angular, and Python, focusing on user-centric features and real-time interactions. I love collaborating with designers and teams to develop scalable, intuitive web applications that make a difference.
Throughout my career, I’ve led projects ranging from on-demand food delivery platforms to financial dashboards, continuously honing my skills in API design, cloud deployment, and mentoring junior developers. I’m passionate about creating reliable, efficient software that enhances user experiences and business operations.
Skills
Work Experience
Senior Software Engineer at Wonder
June 30, 2025 - July 28, 2025Led the end-to-end design and implementation of a multi-layered web application tailored for on-demand food ordering and delivery logistics, focusing on enhancing real-time order tracking and user engagement through intuitive interfaces and scalable backend services. Architected robust, RESTful APIs using Node.js and integrated with asynchronous event queues to manage high-volume order processing and dynamic delivery route optimizations. Collaborated closely with UI/UX designers to develop a responsive Angular frontend, supporting delivery scheduling, real-time updates, and user feedback collection. Implemented location-aware features with geo-mapping to increase customer retention and operational efficiency. Designed and maintained secure user authentication flows with JWT and multi-role access control. Devised optimized PostgreSQL database schemas to support concurrent user activities and order states. Orchestrated CI/CD pipelines using Docker and cloud services. Mentored junior deve
Senior Software Engineer at Wonder
June 30, 2025 - July 16, 2025Led the design and development of scalable backend services using Node.js and PostgreSQL for a high-traffic food delivery platform with over 2 million monthly users. Built responsive and dynamic UI components using React and TypeScript to deliver seamless single-page applications for customers, restaurant partners, and delivery agents. Designed and optimized over 200 relational database schemas for high-performance queries at peak traffic. Implemented real-time order tracking and live updates using WebSockets and Redis for instant delivery notifications. Integrated secure payment workflows supporting multi-party payouts, ACH transfers, and bank account verification. Embedded Google Maps API and Twilio services for ETA calculations, route optimization, driver tracking, and global SMS notifications, improving delivery reliability by 25%. Deployed containerized applications on Docker and AWS, utilizing AWS Load Balancer, CloudWatch, and automated CI/CD pipelines via GitHub Actions. Collab
Senior Full Stack Engineer at Pentalog
March 31, 2023 - July 28, 2025Championed the development of a scalable financial dashboard application integrating real-time payment tracking and compliance reporting using Node.js and Angular. Spearheaded the migration of legacy systems to microservice architectures to optimize transaction throughput and enable fault tolerance. Designed and optimized complex MongoDB data models for regulatory-critical transactional and audit data. Implemented secure OAuth 2.0 authentication protocols with multi-factor authorization and granular user permissions. Coordinated cross-functional agile teams, managing backlog grooming and sprint delivery to accelerate feature rollout cycles. Deployed containerized services with Docker and Kubernetes to handle scaling during peak financial periods. Utilized RabbitMQ for asynchronous service communication, enhancing event-driven responsiveness and system resilience. Advocated test-driven development and API versioning for code quality and backward compatibility.
Senior Full Stack Engineer at Pentalog
March 31, 2023 - July 16, 2025Developed backend infrastructure using Node.js and PostgreSQL for a fintech SaaS platform, implementing core features such as secure payment processing, real-time notifications, and financial reporting. Built interactive dashboards using React, Redux, and React Hooks for real-time UI updates and responsive data visualizations. Designed and optimized relational databases to ensure ACID compliance and performance tuning for read-heavy workloads. Integrated real-time features via WebSockets to enhance user engagement by 30%. Developed RESTful APIs supporting multi-channel delivery and integration with banking APIs and payment gateways. Implemented secure OAuth2 token-based authentication supporting API communications and third-party login providers, complying with fintech security standards.
Full Stack Engineer at Tailent
December 31, 2019 - July 28, 2025Developed and maintained a patient management system to streamline appointment scheduling, clinical data entry, and communication workflows using Python and Angular. Created RESTful APIs for secure data exchange between frontend modules and backend databases, improving healthcare service interoperability. Collaborated with domain experts to implement role-based access controls ensuring HIPAA-compliant protection of patient records. Built responsive UI components for real-time alerts and notifications to medical staff, enhancing response times and patient care coordination. Designed MySQL data schemas optimized for complex patient history and treatment plan queries. Integrated third-party telemedicine platforms facilitating remote consultation scheduling and video conferencing.
Full Stack Engineer at Tailent
December 31, 2019 - July 16, 2025Engineered backend systems using Node.js and MySQL for healthcare platforms utilizing service-oriented architecture to ensure maintainability, robust data validation, access control, and audit trails for regulatory compliance and traceability. Built modern, component-driven UIs with React and WebSockets, tailored to form-heavy medical workflows and real-time updates of patient and appointment data. Developed and maintained RESTful APIs for scalable integration with third-party healthcare services such as insurance platforms, EHR systems, and medical diagnostic APIs. Implemented OAuth2-based authentication with fine-grained access control to secure Protected Health Information (PHI) per industry standards. Deployed applications on AWS with HIPAA-compliant configurations, data residency adherence, and secure storage practices, managing increasing volumes of sensitive medical data.
Web developer at Wipro
July 31, 2016 - July 28, 2025Developed and enhanced consumer-facing e-commerce portals focusing on catalog management, user authentication, and seamless checkout flows using Node.js and AngularJS. Assisted in modular component creation to improve site navigation, product filtering, and dynamic content loading, boosting user experience and conversion rates. Implemented database-driven inventory and order tracking systems with MySQL for accurate stock and fulfillment monitoring. Supported deployment and version control activities using Git and Jenkins, streamlining release processes across multiple regional markets.
Web developer at Wipro
July 31, 2016 - July 16, 2025Contributed to the development of e-commerce platforms using AngularJS and server-rendered templates, implementing core features such as shopping carts, user sessions, order workflows, and background job processing. Built server-rendered SPAs with AngularJS ensuring fast-loading, SEO-optimized pages for improved user experience and search visibility. Refactored and optimized frontend logic reducing bundle size by 20%, improving page load speed and overall performance. Provided ongoing technical support and bug fixes, resolving over 200 issues and reducing incident response times by 35%, enhancing system reliability.
Education
Bachelor’s at The Hong Kong University of Science and Technology
January 1, 2013 - December 31, 2013Bachelor’s of Computer Science at The Hong Kong University of Science and Technology
January 1, 2013 - December 31, 2013Qualifications
Industry Experience
Software & Internet, Financial Services, Healthcare, Transportation & Logistics, Retail
Skills
Hire a Full Stack Developer
We have the best full stack developer experts on Twine. Hire a full stack developer in București today.