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Vytautas Briauka

Vytautas Briauka

Mentor
Rising Codementor
US$10.00
For every 15 mins
ABOUT ME
Senior AI-Powered Full Stack Engineer
Senior AI-Powered Full Stack Engineer

Senior AI-Native Full-Stack Engineer with 9+ years of experience building scalable SaaS platforms, real-time systems, and AI-powered applications for startups across the UK, EU and US.

I specialize in Next.js, Node.js, TypeScript and PostgreSQL with strong expertise in backend architecture, cloud infrastructure and production-grade system design. My focus is building fast, reliable and maintainable software that scales from MVP to enterprise-level usage.

Over the years, I’ve delivered 15+ SaaS products and data-driven platforms across fintech, healthtech, EdTech and e-commerce domains. My recent work focuses heavily on AI integration including OpenAI, Claude, LangChain and vector databases for building automation systems, intelligent workflows and AI-assisted applications.

I enjoy working closely with product-focused teams and startups where I can take ownership of architecture, performance and delivery — turning complex ideas into production-ready systems with measurable business impact.

London (+01:00)
Joined November 2025
EXPERTISE
Node.js
9 years experience
Python
8 years experience
Vue.js
8 years experience
AWS
6 years experience
PostgreSQL
8 years experience
Docker
6 years experience
TypeScript
8 years experience

REVIEWS FROM CLIENTS

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SOCIAL PRESENCE
GitHub
Event-Seating-Map
TypeScript
0
0
BTC-tracking
TypeScript
0
0
EMPLOYMENTS
Senior Full-stack Engineer
Norstella
2023-01-01-Present

Senior engineer contributing to large-scale platform modernization, infrastructure scalability, and multi-product system architecture....

Senior engineer contributing to large-scale platform modernization, infrastructure scalability, and multi-product system architecture.

  • Led a full monorepo migration (Nx + Next.js), consolidating multiple frontend applications into a unified architecture, significantly improving scalability and developer velocity
  • Built automated CMS migration tooling (Contentful → KeystoneJS), reducing manual migration effort by ~60%
  • Designed and implemented CI/CD pipelines to improve deployment reliability and eliminate redundant builds
  • Introduced Terraform-based infrastructure-as-code for scalable AWS environment management
  • Optimized AWS Fargate container infrastructure, improving system reliability and reducing operational downtime
  • Contributed to security hardening, performance improvements, and platform-wide scalability initiatives
  • Collaborated with cross-functional teams and provided technical leadership in architecture decisions
TypeScript
Firebase
CMS
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TypeScript
Firebase
CMS
Docker
Terraform
AWS Lambda
Infrastructure as Code
Next.js
CI/CD
Performance Optimization
Nx
Contentful CMS
AI
Multi Product platforms
Security posture management
Monorepo management
Cross Functional program execution
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Senior Full-Stack Engineer
Freelance
2019-01-01-2023-10-01

Delivered end-to-end SaaS products and AI-powered applications for startups across fintech, healthtech, EdTech and e-commerce sectors....

Delivered end-to-end SaaS products and AI-powered applications for startups across fintech, healthtech, EdTech and e-commerce sectors.

  • Built and shipped 15+ production SaaS platforms and analytics dashboards used by international startup teams
  • Developed AI-powered systems using OpenAI, Claude, LangChain, and vector databases for chat assistants, automation, and document intelligence
  • Architected high-performance full-stack systems using Next.js + Supabase + TypeScript with sub-300ms global response times
  • Improved backend performance by ~40% using Redis caching, database optimization and real-time WebSocket architectures
  • Implemented secure subscription systems (Stripe, Paddle, Lemon Squeezy) with production-grade webhook handling
  • Built and deployed serverless and cloud-native applications using AWS Lambda, Vercel and scalable CI/CD pipelines
Node.js
PostgreSQL
WebSocket
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Node.js
PostgreSQL
WebSocket
Redis
TypeScript
Cloudflare
Cache
Database Tuning
GraphQL
AWS Lambda
Next.js
RESTful API
OpenAI
Vercel
Supabase
Langchain
Claude
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Full-Stack Developer
BrightLayer Technologies
2016-08-01-2018-12-01

Worked on enterprise-grade web platforms, APIs and backend systems with a focus on performance and scalability.

  • Built produ...

Worked on enterprise-grade web platforms, APIs and backend systems with a focus on performance and scalability.

  • Built production web applications using React, Node.js, and PostgreSQL
  • Developed backend automation workflows using AWS S3 and microservices architecture
  • Integrated Stripe payment systems for secure billing and subscriptions
  • Improved API performance through caching strategies and database query optimization
  • Delivered responsive frontend systems using React and Tailwind CSS
Node.js
PostgreSQL
Amazon S3
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Node.js
PostgreSQL
Amazon S3
Redis
Query Optimization
React
Microservices
Stripe api
RESTful API
Tailwind css
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PROJECTS
AI-Powered Financial Management PlatformView Project
2026
Secure multi-tenant financial platform focused on AI-assisted document processing, offline-first workflows, and GDPR-compliant architectu...
Secure multi-tenant financial platform focused on AI-assisted document processing, offline-first workflows, and GDPR-compliant architecture. Key features: • Built secure multi-tenant backend architecture with organisation-level data isolation • Implemented offline-first document workflows using IndexedDB and synchronization queues • Integrated Claude and OpenAI APIs for OCR, PDF extraction, classification, and AI automation • Developed provider-failover AI infrastructure with retry handling and consent-aware processing • Designed GDPR-focused consent management, audit logging, and secure data workflows • Implemented scalable authentication and role-based access control systems
Node.js
PostgreSQL
Unit Testing
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Node.js
PostgreSQL
Unit Testing
Image Processing
Amazon S3
WebSocket
Redis
RabbitMQ
TypeScript
OCR
Speech Recognition
Docker
SendGrid
Cloudflare
Jwt
PDF Text Extraction
Sentry
Eslint
Responsive Web Development
Next.js
PWA
CI/CD
QR Code
Prisma
OpenAI
GDPR
Fastify
AWS CDK
Playwright
Zustand
AWS Textract
AWS
Langchain
LLM
Claude
Pgvector
Tanstack
Multithreaded architecture
Monorepo management
Ai automation
Ai & llm integration
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AI SaaS Productivity PlatformView Project
2025
AI-powered productivity platform designed for task planning, focus optimization, and personalized workflows. Key features: • AI-driven t...
AI-powered productivity platform designed for task planning, focus optimization, and personalized workflows. Key features: • AI-driven task planning using LLM-based logic and user behavior signals • Integrated OpenAI APIs for intelligent recommendations and automation • Built full-stack system with authentication, subscriptions, and analytics • Designed UX optimized for neurodivergent users (ADHD-friendly workflow system)
Node.js
TypeScript
Firebase
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Node.js
TypeScript
Firebase
Next.js
Firestore
Tailwind css
LLM
Shadcn
Ai/llm apis
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