
Adrian Pislaru
Verified Expert in Engineering
Software Developer
Bucharest, Romania
Toptal member since November 30, 2022
Adrian is a senior software engineer with a strong focus on mobile apps, AI workflows, and LLM applications. He has developed solutions across industries such as food, health, automotive, education, commerce, and IoT, improving existing processes and creating new ones. Adrian has extensive experience in building and leading development teams, setting up projects from scratch through deployment, and maintaining them over time.
Portfolio
Experience
- Node.js - 10 years
- TypeScript - 10 years
- Full-stack Development - 10 years
- React - 10 years
- Swift - 10 years
- Flutter - 8 years
- Agentic AI - 5 years
- Large Language Models (LLMs) - 5 years
Work Experience
Full-stack Developer
Redwood Strategic Holdings S.A.
- Developed full-stack features across web, mobile, and backend with React and NestJS, delivering booking, scheduling, and client management flows that worked consistently on every platform.
- Built AI-powered agents into the CRM to automate booking tasks and client communication, reducing manual work for service businesses and speeding up daily operations.
- Leveraged agentic coding systems and workflows to generate, test, and refactor code, cutting feature delivery time while keeping quality high through careful review.
- Refactored legacy components into reusable UI modules shared across web and mobile, accelerating new feature development and improving long-term maintainability.
- Diagnosed and fixed critical production bugs across the front-end, API, and database layers, improving platform stability and reducing customer-facing issues.
Senior Mobile Developer (via Toptal)
Hungerstation
- Maintained and enhanced critical checkout and payment flows, ensuring a reliable and seamless purchase experience for customers while supporting business-critical functionality in one of the most sensitive areas of the product.
- Owned and supported cart integration across multiple screens and user journeys, helping create a consistent experience throughout the app and ensuring cart-related features worked smoothly across different parts of the platform.
- Worked across both iOS and Flutter codebases, contributing to the stability, scalability, and evolution of a hybrid mobile architecture while helping bridge native and cross-platform development needs.
- Improved the app architecture by introducing reusable and efficient solutions, reducing duplication, and enabling faster feature delivery.
- Leveraged AI tools to create automations for repetitive daily tasks, improving efficiency and reducing manual effort.
Full-stack AI Developer
Marketing Startup
- Designed and built an end-to-end SaaS platform with LangGraph-powered AI agents for content generation, SEO, and keyword analysis, helping eCommerce brands create on-brand marketing assets at scale.
- Architected a monorepo with NestJS, Next.js 15, React, PostgreSQL, Redis, Stripe, and MinIO, using clear module boundaries so auth, billing, storage, and AI could be developed independently.
- Implemented secure authentication with Google OAuth, JWT refresh token rotation, HttpOnly cookies, CSRF protection, and cross-subdomain sessions, protecting against token tampering and session attacks.
- Built the full Stripe subscription flow, including checkout, plan changes through the Customer Portal, webhook-based status sync, and automatic refunds during the money-back guarantee period.
- Designed a pluggable AI layer using LangChain and BullMQ queues for async generation, making it easy to switch between OpenAI, Anthropic, or self-hosted models without changing business logic.
- Built the brand context engine, which turns URLs, files, and briefs into a persistent knowledge layer so every AI generation reflects the brand's real voice, products, and audience.
- Containerized the full stack with Docker Compose for dev and production, kept PostgreSQL, Redis, and MinIO off public networks, and set up CI/CD with GitHub Actions on a self-hosted runner.
Senior iOS Developer (via Toptal)
Freelance Client
- Identified and resolved critical bugs within the application, enhancing its stability and user experience.
- Conducted a comprehensive security review of the private messaging app, assessing potential vulnerabilities and implementing necessary enhancements.
- Implemented advanced security features, including SSL pinning, to fortify the application against potential security breaches.
Senior Flutter Developer (via Toptal)
True Footage Inc.
- Developed smart forms incorporating dynamic data retrieval from Firebase's real-time database. This allowed the application to maintain high performance and reliability, significantly enhancing the user experience by providing up-to-date data.
- Executed pixel-perfect implementations using Material UI, ensuring the application adhered closely to the intended design aesthetics. This precision in design integration resulted in an exceptionally user-friendly interface.
- Implemented comprehensive online and offline support for the application, ensuring consistent access and functionality across varying network conditions.
- Dedicated significant attention to the performance and architecture of the application, achieving a highly responsive and efficient app environment.
- Implemented a testable and scalable codebase with a strong emphasis on modular architecture. This strategic approach facilitated easier updates and maintenance, enhancing the application's adaptability and longevity in a competitive market.
Flutter Developer
Energy Startup
- Incorporated Bluetooth Low Energy protocols into the application, allowing for efficient, real-time communication with numerous IoT devices.
- Implemented a pixel-perfect design meticulously using Flutter's flexible UI toolkit, employing my keen eye for detail and commitment to providing an excellent user experience.
- Employed secure Bluetooth pairing methods to protect communication between the app and IoT devices and used data encryption to safeguard user information.
- Optimized performance, ensuring the application could efficiently serve a large user base without performance degradation while maintaining its streamlined functionality.
- Applied an innovative approach to this Flutter-based project, laying the groundwork for future advancements in energy management and smart home technology.
Video Conference Platform Expert
HealthCare Startup (Toptal)
- Installed and configured the Jitsi server, STUN, and TURN servers. Implemented security measures.
- Designed and implemented the server architecture on AWS, selecting appropriate services and optimizing resources for scalability and load balancing.
- Ensured a reliable and secure video conferencing service for the client, saving time and money while providing a high-quality user experience.
Technical Lead
Publicis Sapient
- Created and managed projects through their entire lifecycle. Set up the project architecture and CI/CD pipelines, performed code reviews, conducted sprint ceremonies, and handled project rollout and maintenance.
- Provided consultancy for various solutions, tech stacks, and architectures for multiple clients in the project discovery phase to ensure a reasonable development evolution of the projects.
- Developed native and hybrid mobile applications using Swift and React Native by integrating stunning user interfaces, animations, authentication flows, payment flows, and live updating timelines.
- Created RESTful APIs in Node.js using the best development practices and security solutions.
- Contributed to a coaching program for developers of all levels of expertise, defining and tracking goals, setting up a good mood and culture, solving technical problems, listening to needs, and facilitating quarterly feedback sessions.
- Participated in an internship program by guiding interns through the starter project, setting goals, and trying to reach different technical and soft skills milestones across the program.
- Took part in the leadership team of the mobile department, helping the engineering manager solve day-to-day situations, tracking various KPIs, and following company-level processes to ensure the department's evolution.
- Assisted in the technical recruitment process for interns up to senior-level developers.
Senior Software Engineer
EnBW
- Worked on bug fixes and improvements for the existing iOS EV mobile application. This involved analyzing and troubleshooting code, writing and testing new code, and working with other team members to identify and resolve issues.
- Collaborated with team members to plan and implement new features and functionalities for the iOS EV mobile application, including integration with new payment systems and additional charging station providers.
- Maintained clean and efficient code following best practices and standards, with a focus on the performance and reliability of the app. Conducted code reviews and provided feedback to junior developers to improve their skills and knowledge.
- Stayed up-to-date with iOS development trends and incorporated new technologies and frameworks into the iOS EV mobile application as appropriate. Researched and tested new libraries to improve app performance, functionality, and security.
- Increased the app's security state to a higher level than at the beginning. This way, the company won a local security contest in the Baden-Württemberg area in Germany three times in a row.
Full-stack Developer
Freelance
- Wrote well-designed and testable code using the best development practices in the industry.
- Created custom website layouts using HTML, CSS, and Bootstrap integrated into the React framework.
- Integrated and created various RESTful APIs using Node.js and Express.js.
- Handled card payment integration for various subscriptions and product purchasing functionalities.
- Used industry-leading technologies and frameworks to ensure products' quality, efficiency, and security.
Project History
Indoor Positioning System
EfficientAI: Streamlining Business Processes (Chrome Extension and App)
The applications did not only excel in delivering precise and timely information, but also prioritized user accessibility, data security, and employee satisfaction. Its design dynamically adapted to the specific needs of each employee, ensuring a personalized and seamless experience. This internal tool embodied the company's commitment to boosting productivity and streamlining business operations, creating a user-friendly digital environment for its employees.
Tinder-like Showcase Mobile App
EV-charging Mobile App
Corporate Benefits Provider Mobile App
Smart Coffee Grinder Hybrid Mobile App
Virtual Fitness Platform
Digital Wedding Planner Website
Education
Master's Degree in Computer Science
University of Bucharest - Romania
Bachelor's Degree in Computer Science
University of Bucharest - Romania
Certifications
Front-end Mobile Frameworks: iOS, Swift, SwiftUI
Udemy
Front-end JavaScript Frameworks: React
Udemy
Skills
Libraries/APIs
React, Node.js, REST APIs, Stripe API, Stripe, OpenAI API, Claude API, WebRTC
Tools
Slack, Claude, Xcode, Git, Claude Code, Jira, Figma, Jenkins, GraphRAG
Languages
TypeScript, JavaScript, Swift, Dart, Python, HTML, CSS
Frameworks
LangGraph, Redux, React Native, Flutter, SwiftUI, Next.js, NestJS, Express.js, JSON Web Tokens (JWT)
Paradigms
Azure DevOps, Mobile Development, REST, Agile, Scrum, DevOps
Platforms
Docker, iOS, Firebase, Amazon Web Services (AWS)
Storage
PostgreSQL, Redis, Firebase Realtime Database
Other
Software Development, APIs, Software Design, Cursor AI, OpenAI, LangChain, WebSockets, BullMQ, GitHub Actions, Full-stack Development, Software Architecture, Jitsi, STUN/TURN, Agentic AI, LLM Agents, Agentic Coding, Agentic Workflow Design, Large Language Models (LLMs), Generative Artificial Intelligence (GenAI), Retrieval-augmented Generation (RAG), Chatbots, OAuth, Application Security, Bluetooth Low Energy (BLE), Internet of Things (IoT), Push Notifications, CI/CD Pipelines, Technical Leadership
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