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I’m a senior AI full stack engineer with 8+ years building scalable SaaS platforms, AI-powered applications, and business automation products end to end. I work across backend and frontend with Python (Django/FastAPI), React/Next.js, TypeScript, and PostgreSQL, and I focus on clean architecture, security, and performance in production systems. In my recent roles, I’ve integrated OpenAI/LLM capabilities for document processing, intelligent search, AI assistants, and workflow automation. I also design multi-tenant SaaS patterns (auth, authorization, subscriptions, payments), ship on AWS with Docker/Kubernetes, and improve reliability through automated testing and CI/CD—partnering closely with product, design, and engineering to deliver measurable outcomes.…I’m a senior AI full stack engineer with 8+ years building scalable SaaS platforms, AI-powered applications, and business automation products end to end. I work across backend and frontend with Python (Django/FastAPI), React/Next.js, TypeScript, and PostgreSQL, and I focus on clean architecture, security, and performance in production systems. In my recent roles, I’ve integrated OpenAI/LLM capabilities for document processing, intelligent search, AI assistants, and workflow automation. I also design multi-tenant SaaS patterns (auth, authorization, subscriptions, payments), ship on AWS with Docker/Kubernetes, and improve reliability through automated testing and CI/CD—partnering closely with product, design, and engineering to deliver measurable outcomes.

Janik Daniel

AI Engineer, Full Stack Developer, Software Engineer, +2

5.0 (1 review)

I’m a senior AI full stack engineer with 8+ years building scalable SaaS platforms, AI-powered applications, and business automation products end to end. I work across backend and frontend with Python (Django/FastAPI), React/Next.js, TypeScript, and PostgreSQL, and I focus on clean architecture, security, and performance in production systems. In my recent roles, I’ve integrated OpenAI/LLM capabilities for document processing, intelligent search, AI assistants, and workflow automation. I also design multi-tenant SaaS patterns (auth, authorization, subscriptions, payments), ship on AWS with Docker/Kubernetes, and improve reliability through automated testing and CI/CD—partnering closely with product, design, and engineering to deliver measurable outcomes.…I’m a senior AI full stack engineer with 8+ years building scalable SaaS platforms, AI-powered applications, and business automation products end to end. I work across backend and frontend with Python (Django/FastAPI), React/Next.js, TypeScript, and PostgreSQL, and I focus on clean architecture, security, and performance in production systems. In my recent roles, I’ve integrated OpenAI/LLM capabilities for document processing, intelligent search, AI assistants, and workflow automation. I also design multi-tenant SaaS patterns (auth, authorization, subscriptions, payments), ship on AWS with Docker/Kubernetes, and improve reliability through automated testing and CI/CD—partnering closely with product, design, and engineering to deliver measurable outcomes.

Available to hire

I’m a senior AI full stack engineer with 8+ years building scalable SaaS platforms, AI-powered applications, and business automation products end to end. I work across backend and frontend with Python (Django/FastAPI), React/Next.js, TypeScript, and PostgreSQL, and I focus on clean architecture, security, and performance in production systems.

In my recent roles, I’ve integrated OpenAI/LLM capabilities for document processing, intelligent search, AI assistants, and workflow automation. I also design multi-tenant SaaS patterns (auth, authorization, subscriptions, payments), ship on AWS with Docker/Kubernetes, and improve reliability through automated testing and CI/CD—partnering closely with product, design, and engineering to deliver measurable outcomes.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Language

English

Fluent

Polish

Fluent

Work Experience

Senior AI Full Stack Engineer at Pendo.io

January 24, 2025 - August 18, 2026

• Engineered AI-powered SaaS platforms with Python, FastAPI, Django, React, Next.js, and TypeScript across backend, frontend, and product workflows. • Integrated OpenAI APIs and LLM-based capabilities for AI assistants, document processing, intelligent search, and workflow automation. • Architected scalable multi-tenant SaaS patterns covering authentication, authorization, subscription management, and payment integrations. • Implemented RESTful and GraphQL APIs plus third-party service integrations supporting complex business workflows. • Structured PostgreSQL, MongoDB, Redis, and cloud-based data solutions with attention to scalability and application performance. • Deployed production applications on AWS with Docker, Kubernetes, and CI/CD pipelines. • Improved reliability, security, scalability, and performance through architecture optimization and automated testing. • Collaborated with founders, product managers, designers, and engineering teams through the complete product lifecycle.

Full Stack Python Engineer at Omnicom

September 25, 2022 - November 12, 2024

• Developed scalable web applications and SaaS products with Python, Django, Flask, FastAPI, React, Next.js, and TypeScript. • Delivered secure backend services, APIs, authentication systems, dashboards, and business management platforms. • Created responsive, SEO-friendly frontend applications with React and Next.js. • Optimized database schemas and query patterns across PostgreSQL, MySQL, MongoDB, and Redis. • Connected external APIs, payment gateways, authentication providers, and automation services into production workflows. • Introduced background jobs, caching, asynchronous processing, and real-time application features. • Containerized applications with Docker and supported cloud deployment and CI/CD automation. • Contributed to code reviews, technical planning, debugging, testing, and system architecture decisions.

Full Stack Engineer at Filevine

February 24, 2020 - September 25, 2022

• Delivered full-stack web applications for startups and growing businesses with Python, Django, Flask, React, Node.js, and Next.js. • Engineered RESTful APIs, database systems, administrative dashboards, customer portals, and internal business applications. • Established secure authentication, role-based permissions, data validation, and application security practices. • Structured scalable database architectures using PostgreSQL, MySQL, MongoDB, Firebase, and Redis. • Integrated third-party APIs, payment systems, notification services, and external business platforms. • Refactored legacy applications and migrated outdated components to modern frameworks and architectures. • Improved application performance through database optimization, caching, code refactoring, and frontend optimization. • Maintained reliable development and production workflows with Git, Docker, CI/CD, and cloud deployment practices.

Junior Full Stack Developer at Google

September 14, 2018 - January 13, 2020

• Maintained web applications with Python, JavaScript, React, Django, and REST APIs. • Crafted responsive frontend components and integrated them with backend services. • Created database models, queries, API endpoints, and application functionality using PostgreSQL and MySQL. • Resolved bugs, optimized existing functionality, and improved application stability. • Added third-party API integrations, authentication flows, and data-management features. • Participated in Agile development, sprint planning, code reviews, testing, and technical documentation. • Applied Git and Docker within collaborative software development workflows. • Collaborated with senior developers and cross-functional teams to deliver new features and maintain existing applications.