Levon Sargsyan
Verified Expert in Engineering
Full-stack Developer
Oxford, United Kingdom
Toptal member since June 4, 2022
Levon is a CTO-level technology leader with 10+ years of experience building and scaling products across fintech, healthcare, travel, and SaaS. An Oxford Saïd Business School MBA, he bridges business strategy and engineering—translating ideas and growth goals into scalable architectures and execution plans. He works closely with founders and executives to build teams, systems, and technology that drive real business outcomes.
Portfolio
Experience
- HTML - 8 years
- JavaScript - 8 years
- CSS - 8 years
- MongoDB - 7 years
- Node.js - 7 years
- Express.js - 7 years
- Meteor - 6 years
- React - 6 years
Preferred Environment
Slack, Meteor, Node.js, React, Express.js, MongoDB, MySQL, TypeScript, Agile
The most amazing...
...thing: I led the design and scaling of AI healthcare, telemedicine, fintech, and enterprise platforms, translating business goals into production systems.
Work Experience
Chief Technology Officer
Amplifidor
- Charged with orchestrating the company's technology strategy and managing the IT infrastructure to align with business goals.
- Engaged with stakeholders, managed IT budget, and fostered a culture of continuous improvement and agile response to evolving tech trends.
- Created and managed cross-functional teams to deliver scalable IT solutions and drive the adoption of innovative technologies to optimize processes and enhance productivity.
- Managed the transition from a fully outsourced team to a newly created in-house team, as well as a change in work style (from Kanban to full Scrum).
- Established processes for maintaining best practices in planning, executing, and testing the solutions, bringing a high level of automation to teamwork.
- Created architecture for highly scalable cloud-native system architecture with a strong accent on modularity, performance, and cost efficiency.
Senior Software Developer
Ufonia
- Played a key role in migrating Ufonia’s infrastructure from AWS to Google Cloud Platform, ensuring a smooth transition and improved scalability.
- Developed and integrated a unified access management system, simplifying secure user authentication and improving user experience.
- Contributed to designing a synchronous, pipeline-driven architecture for call handling, optimizing the flow and reliability of the AI-driven calls.
- Helped integrate a large language model chatbot agent, including transcription, text-to-speech services, and multilingual workflows to broaden the assistant’s accessibility.
- Created a comprehensive data warehouse and built dashboards that provided clear visibility into key metrics and operational insights for the team.
Chief Technology Officer
Alienlab LLC
- Hired, trained, and managed technical staff. Created individual learning programs, conducted performance reviews, and built an efficient tech team ready to face significant tech challenges.
- Planned the development of the clients' projects by defining timelines, selecting the tech stack, maximizing the architecture's performance, and cost-optimizing solutions, which resulted in many success stories.
- Created and managed infrastructure tools used in the company that led to an automated, efficient, and reliable day-to-day workflow.
Tech Lead
HGAT
- Volunteered at HGAT as part of Toptal's TopVolunteer program. I served as the tech lead, leading many Toptal talents.
- Created and managed functional teams and set up the guidelines and tech stack based on unique and restricted requirements of the project.
- Created the scalable architecture of the system and adopted strict limitations of requirements.
Lead Software Developer
HealthStaffEd
- Led development team working on the core platform.
- Managed the architectural decisions and shifted to a more scalable infrastructure.
- Adapted the application for new clients adopting it accordingly.
Lead Software Developer
Mindful
- Built a messaging app that allowed call center employees to communicate with customers via SMS.
- Restructured a monolithic application into a distributed system, able to extreme loads by complex scaling methods.
- Developed a pipeline that captures customer interaction and automates communication by recognizing customer intents and scheduling callbacks accordingly.
Senior Software Developer
DarkMatter LLC
- Created specifications for microservices that connected government entities and process data used by 150+ web applications.
- Participated in developing a distributed system architecture intended to digitize every governmental entity interaction in Abu Dhabi.
- Crafted templates to automate the creation of new and secure microservices.
Senior Software Developer
Snappr
- Built an application to analyze users' professional profile photos that specifies the good and bad sides and suggests tips and a proper professional photoshoot.
- Developed an application that also analyzes users' photos but from a dating application perspective.
- Created a photographer booking procedure, which suggests the best fit for each customer depending on their location, needs, and other criteria.
- Implemented a user interaction collection system to generate stats that help Snappr continuously improve the platform.
Experience
Mindful Messaging
https://getmindful.com/Snappr
https://www.snappr.com/HealthStaffEd LMS
https://www.healthstaffed.com.au/LongTailPro
Currencii
Data Migration and Warehouse System for Healthtech Product
Education
Master's Degree in Master of Business Administration (MBA)
Saïd Business School, University of Oxford - Oxford, UK
Master's Degree in General Medicine
Yerevan State Medical University - Yerevan, Armenia
Bachelor's Degree in General Medicine
Yerevan State Medical University - Yerevan, Armenia
Certifications
Certified Associate in Project Management (CAPM)
Project Management Institute (PMI)
AWS Certified Cloud Practitioner
Amazon Web Services
Skills
Libraries/APIs
React, Handlebars, Node.js, jQuery, Claude API, REST APIs, WebRTC, Steam Integration, Steam Web API, Stripe API, Stripe, OpenAI API, Google Maps API, Playwright, Stripe Connect, Puppeteer, GraphQL API, Pydantic, Redis Queue, Socket.IO, Mapbox API, WhatsApp API, Social Media APIs
Tools
CircleCI, Git, Claude, Claude Code, GitHub, Jira, AI Prompts, n8n, ChatGPT, Microsoft Excel, Google Sheets, GitLab CI/CD, Terraform, Google Analytics, Vitest, Shadcn, TanStack Router, Amazon Cognito, Slack, Amazon Elastic Container Service (ECS), AWS Fargate, Amazon Simple Notification Service (SNS), Amazon Lex, ELK (Elastic Stack), Codeship, Google Kubernetes Engine (GKE), Travis CI, Amazon EKS, Amazon Simple Queue Service (SQS), Amazon Elastic Container Registry (ECR), Claude Agent SDK, Drizzle ORM, Prisma, Amazon CloudWatch, SMART on FHIR
Languages
JavaScript, CSS, HTML, Less, TypeScript, Python, GraphQL, Sass, SQL, PHP, C#
Frameworks
Express.js, Next.js, Swagger, Redux, React Native, Serverless Framework, Tailwind CSS, Angular, NestJS, Jest, Fastify, .NET, Bootstrap, Ant Design, Electron
Paradigms
Microservices Architecture, Agile, Microservices, API Architecture, DevOps, B2B, Automation, Continuous Integration (CI), REST, Serverless Architecture, Requirements Analysis, HIPAA Compliance, Database Design, Role-based Access Control (RBAC), Testing, Real-time Systems, Agile Software Development, Scrum, Lambda Architecture
Platforms
Meteor, Amazon EC2, Docker, Amazon Web Services (AWS), AWS Lambda, Galaxy, Heroku, Google Cloud Platform (GCP), Firebase, Replit, Vercel, Mobile, PostHog, Android, iOS, Azure, MacOS, AWS Elastic Beanstalk, Kubernetes, Rancher, Apache Kafka, HubSpot, Twilio
Storage
Amazon S3 (AWS S3), MongoDB, PostgreSQL, JSON, Databases, Redis, MySQL, Auto-scaling Cloud Infrastructure, Data Pipelines, Microsoft SQL Server, Amazon DynamoDB, Google Cloud, Redshift, Database Management, Amazon Aurora
Industry Expertise
Automotive, Project Management, Healthcare, Marketing
Other
Web Scraping, Semantic UI, Atlas, APIs, Front-end, Front-end Development, Full-stack, API Integration, Full-stack Development, Leadership, Software Architecture, Architecture, Technical Leadership, CTO, User Interface (UI), Architectural Patterns, SaaS, Software as a Service (SaaS), Separation of Concerns (SoC), Web App Development, Supabase, Fractional CTO, Deployment, Code Review, Solution Architecture, Web Development, Artificial Intelligence (AI), Minimum Viable Product (MVP), AI Tools, Cloud, Third-party Integration, Large Language Models (LLMs), Early-stage Startups, UI Development, Cloudflare, PWA, Anthropic, Performance Optimization, Software Development, Hands-on Implementation, High Code Quality, Scaling, Automations, Back-end, Payments, Multi-tenant SaaS, Multi-tenant Architecture, Third-party APIs, Open Source, Trading, Integrations, Application State Management, Responsive UI, Team Leadership & Supervision, Web Applications, WebSockets, FastAPI, CI/CD Pipelines, Progressive Web Applications (PWAs), Back-end Development, Coding, Technical Hiring, Training, Technical Project Management, Lambda Functions, Serverless, Software Design, Chrome Extensions, Social Media Apps, Cloud Patterns, EventBus, Cloud Architecture, SaaS Design, AWS Cloud Architecture, Vite, ECS, Infrastructure, Cloud Infrastructure, GitHub Actions, AI Chatbots, AI Agents, Agentic AI, Prompt Engineering, AI Integration, AI-generated Code, Vibe Coding, Cursor AI, ElevenLabs Solutions, CRM, User Experience (UX), Chatbots, Dashboards, End-to-end Implementation (E2E), OpenAI, Healthtech, Team Management, Agentic Coding, Lovable, Security, Fintech, Engineering Management, Startups, Auditing, Scripting, Inventory Management, Data Extraction, Geolocation, OAuth, Google Analytics 4 (GA4), Financial Services, Live Chat, Analytics, Image Processing, LLM Integration, Real-time Data, Data Visualization, eCommerce, ChatGPT API, AI Automation, Browsers, Double-entry Bookkeeping, Payment APIs, Agentic Workflow Design, Zustand, Distributed Systems, OpenAI SDK, Resend, AI Model Integration, Computer Vision, AI Model Training, Privacy, Reporting, Workflows, Reports, Customer Data Platform (CDP), Data Analytics, Email, Webhooks, Infrastructure as Code (IaC), Internet of Things (IoT), Healthcare Software, System Architecture, Product Management, Document Parsing, CSV, Data Processing, Gmail, Workflow Automation, Microsoft Azure, Pipelines, User Roles, Education Technology (Edtech), Telephony, Real-time Streaming, Low Latency, Medicine, Medtech, Amazon RDS, xAPI, Stripe Payments, TypeORM, IT Project Management, Forums & Social Networking Portals, Medical Software, Health, Streaming, Mobile App Development, Strapi, Business, Strategy, QR Codes, Statistics, Audio, Resource Management, Compliance, Data Governance, Supply Chain, Supply Chain Operations, Manufacturing Resource Planning (MRP), Demand Planning, Production Planning & Control (PPC), Maps, Accessibility, WhatsApp, Caching, Marketing Analytics, Financial Markets, Deno, Synchronization, Conflict Resolution, Row-level Security (RLS), Finance, Data Engineering, Machine Learning, Financing, Financials, Go-to-market (GTM) Strategy, Design, HIPAA
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