Full Stack Developer

Boris Bershadsky – Sr. Full Stack Software Engineer

Toronto, ON [GitHub: bbershadsky] [Portfolio: borisb.ca] *.*****@*****.***

Executive Summary

Highly accomplished Senior Full Stack Developer with 8+ years of experience delivering modern, cloud-deployed web and mobile applications. Proficient in building JavaScript/TypeScript and React-based applications with extensive experience in React.js, Next.js, GraphQL, and micro frontends, including Expo workflows for mobile. Skilled at integrating web frontends with complex multi-tier backend systems, ensuring scalability, maintainability, and strong API-driven design.

Expert in deploying serverless applications on AWS (Lambda, API Gateway, DynamoDB, S3), and automating infrastructure with Terraform and CI/CD pipelines via GitHub Actions. Adept at managing monorepos and contributing to large-scale frontend architectures in agile environments.

Hands-on experience with web analytics platforms such as Google Analytics and Adobe Analytics, leveraging insights to optimize user engagement and product performance. Strong advocate of Domain-Driven Design (DDD), microservices, and serverless architectures to deliver resilient, scalable solutions.

A self-driven, collaborative leader who mentors engineers, drives architectural innovation, and consistently achieves measurable impact in fast-paced, user-focused environments. Now seeking to leverage deep expertise in React, TypeScript, and cloud-native deployments to contribute to large-scale, high-impact frontend systems.

Core Competencies

Frontend Development

·React/React Native (TypeScript) with state management (Redux, context)

·Modern UI Frameworks (MaterialUI, RadixUI, Tailwind CSS)

·Data Visualization (D3.js, Chart.js, Plotly, HighCharts)

System Reliability & Security

·Security Best Practices (OAuth 2.0, JWT, Auth0, Token API security)

·Disaster Recovery and backup strategies (Bash scripts, Cron jobs, SSH, FTP automation)

DevOps & Infrastructure

·AWS Cloud Infrastructure (ECS, ECR, RDS, S3, IAM, Lambda)

·CI/CD Pipelines (GitLab, GitHub Actions, Docker, Kubernetes

·Infrastructure as Code (Terraform)

·System Monitoring (Prometheus, Grafana, ELK Stack)

·Containerization (Docker, Kubernetes, Nomad)

·High Availability cluster design and implementation

Backend Development & Data Engineering

·Full-Stack Python/Django: Django REST Framework

·API Design & Development: Expertise in building robust, versioned APIs using REST, GraphQL, gRPC, and tRPC

·ETL & Workflow Orchestration: Designed and optimized complex data workflows using Apache Airflow, Celery, and n8n, enabling real-time and batch data processing across distributed systems.

·Data Modeling & Big Data Integration: Skilled in designing normalized and denormalized schemas for analytical and transactional systems, and orchestrating data pipelines for large-scale data ingestion and transformation.

·Infrastructure & Deployment: Familiar with containerized deployment using Docker, Github CI/CD pipelines

AI & Machine Learning

·LangChain/LangGraph/LangSmith pipeline development and orchestration

·LLM Integration (OpenAI, Google AI, Anthropic) with focus on complex prompt engineering

·AI powered Analytics and compliance features to help make data driven business decisions

·Vector Databases (Pinecone) and RAG implementations on selfhosted and cloud

·ML Model Deployment and MLOps practices with finetuning and custom embeddings

·Model Finetuning using LoRA, QLoRA, and custom training datasets for domain specific applications

Professional Experience

Senior React Native Developer FlipGive Sports & Ecommerce Fintech in Toronto Jul 2024-Dec 2024

AI Integration & Analytics:

·Conducted AI-powered user behavior analytics with PostHog, identifying 3 user journey bottlenecks, increasing user retention

·Implemented predictive analytics features for user engagement, resulting in 35% higher user session durations

·Developed scripted testing framework for data driven feature rollout using Mobot, bash, and EAS reducing testing time by 75%

Technical Achievements:

·Managed entire lifecycle of Sports Connect white label platform for Stack Rewards, achieving 100% client satisfaction

·Converted 50+ TypeScript React components to React Native with performance optimization, achieving 40% faster app load

·Built testing toolkit in RN Expo for new feature deployment, validation, and publishing, reducing release cycle time by 200%

·Collaborated with 6 person engineering team in agile environment, conducting knowledge sharing sessions

Technologies: React Native, TypeScript, Expo, PostHog, Mobot, Jest, Cypress

Senior Full Stack & React Native Developer Duffl.com YC-Backed Delivery Startup in California Nov 2023-Mar 2024

Full Stack Development & DevOps:

·Migrated ReactJS to React Native Expo SDK 50 with TypeScript for cross-platform deployment, achieving 90%+ code reuse between React web and Expo mobile platforms (IOS and Android), reducing development time by 60%

·Implemented AWS S3 for delivery drop-off photos, enabling real-time delivery verification for 1,000+ daily deliveries

·Created product/category/staff with dynamic pricing algorithms, increasing order value by 18% and driving higher retention

·Upgraded NodeJS 14 to 21 with security patches, eliminating 12 critical security vulnerabilities, improving performance by 25%

AI & Analytics Features:

·Integrated PostHog for user pattern identification and UX optimization for A/B tests, identifying 5 key conversion bottlenecks

·Developed predictive delivery time algorithms using historical data analysis

·Built real-time notification system using WebSockets and push notifications, achieving 98% notification delivery success rate

Team Leadership:

·Collaborated with Lead Designer, turning Figma mockups into prod features, reducing design-to-dev hand-off time by 50%

·Mentored frontend devs in React Native best practices+performance optimization, resulting in 40% faster feature deployment

·Conducted thorough testing with Cypress + Jest for 70%+ code coverage, reduced QA cycle time by 60%

Technologies: React Native, TypeScript, Expo, AWS S3, NodeJS, PostgreSQL, WebSockets, Cypress, Jest

Senior Robotics Software Developer Kindred.ai Robotics AI Startup in Toronto Oct 2021-Jan 2023

AI & Robotics Integration:

·Engineered OnGrid Robotic Pick (OGRP) platform using gRPC, React, and Go, enabling 24/7 automated operations and increased picking efficiency by 250% and reduced human error by 98%

·Designed computer vision algorithms for robotic control and food/grocery object recognition, achieving 98% object detection

·Built enterprise-grade monitoring for robotic operations and performance/QA analytics, delivering 99.9% operational visibility

·Experimented with Vertex AI for advanced ML model training and deployment, improving robotic decision-making accuracy

DevOps & Infrastructure:

·Orchestrated Nomad/Docker camera and software control stacks on UR10e robots, managing 10+ robots across 2 locations

·Maintained 24/7 production support through PagerDuty and Slack for critical operations

·Automated testing and deployment pipelines, reducing production incidents by 90%+ and accelerating deployment cycles

Technologies: Go, gRPC, React, Docker, Nomad, PostgreSQL, Computer Vision, VertexAI

Full Stack Blockchain Solutions Architect PhoenixFX Crypto Fintech Startup in Toronto Nov 2020-Jul 2021

AI Powered Financial Systems:

·Architected a SaaS trading platform with MT4 integration and AI-driven risk assessment models for portfolio protection.

·Engineered ETL processes for FX currency conversions using the Block.io API, handling 10,000+ transactions daily

·Designed and deployed an automated auditing system with AI-powered anomaly detection for regulatory compliance.

Technical Leadership:

·Mentored a junior ReactJS developer through agile methodology with modern and secure development practices, resulting in 50% faster feature delivery and 80% reduction insecurity vulnerabilities

·Hired and trained a DevOps Engineer specializing in Kubernetes for distributed high-availability (HA) clusters.

oBuilt a highly available infrastructure with PostgreSQL and Redis running on MetalLB load balancers.

oImplemented a fault-tolerant, multi-zone CDN powered by Nginx and Cloudflare for global low-latency failover.

Blockchain & Fintech:

·Built real-time BTC processing with automated and scheduled invoice generation, processing $120M+ with 100% accuracy

·Developed risk adjustment API control with predictive analytics using the Skydesks API, reducing portfolio drawdown by 40%

·Implemented WebSocket-based notifications for live trading activity and profit/loss updates, reducing support tickets by 60%

Technologies: Django, ReactJS, PostgreSQL, Redis, Celery, Docker, Kubernetes, MT4 DWX API, Block.io API, Skydesks API

Senior Full Stack Embedded Developer Chainvu IoT Embedded Systems Startup in Toronto Jan 2019-Jan 2020

IoT & Data Engineering:

·Engineered embedded firmware and drivers for TI CC2642 and NRF52832 MCU, enabling deployment of 1000+ IoT sensors

·Implemented OTA software updates for large-scale sensor networks, enabling remote bug fixes on deployed devices

·Built end-to-end testing environment with real-time BLE sensor monitoring, cutting time-to-market by 60%

Data Pipeline Development:

·Built multi-user dashboard with Raspberry Pi 4, Grafana, PostgreSQL, and InfluxDB, delivering real-time client monitoring

·Created sensor inventory tracking tool using ReactJS and Python Flask, reducing management overhead by 80%

·Designed and Implemented ETL workflows for sensor data processing and analytics, handling 100K+ data points daily

Technologies: Embedded C, RTOS, Python, Flask, PostgreSQL, InfluxDB, Grafana, BLE IoT Protocols

Full Stack Embedded Developer Sensor Breath/Solvax IoT Health Startup in Toronto Nov 2016-Jan 2018

IoT & Data Engineering:

·Designed + developed a test bench to record, analyze, graph, and backup real-time sensor data for a 24bit ADC MCU based on Teensy 3.2 and Raspberry Pi using C++, Python, Plot.ly, and MongoDB

·Built and tested a portable ”Intelligent Hot Plate” with mobile remote control of temperatures between -4C to +60C with 0.25 degree precision accounting for hysteresis using PT100 RTD, 2P2Trelays, custom designed PCB, 12v peltier module, voltage boost converter, and ESP32 NodeMCU

Data Pipeline Development:

·Created a low latency tiny live view web client with Plot.ly, React, Meteor, and MongoDB

Technologies: C++, Python, Plot.ly, MongoDB, ESP32

Personal Projects

Full Stack Fintech Architect & AI Solutions Lead Pacific.Markets Pre-seed Startup Mar 2025-Present

·Engineered LangChain based AI pipeline for automatic BTC deposit onboarding and risk assessment, reducing manual review time by 85% and improving fraud detection accuracy by 90%

·Implemented LangSmith monitoring for user performance tracking and prompt optimization, achieving 40% faster response times and 25% reduction in API costs

·Created AI powered risk management dashboard leveraging Gemini 2.5 Deep Research API and Perplexity finance, enabling real-time risk assessment for $10M+ in daily trading volume

·Built ETL workflows for real-time cryptocurrency/FX data processing and analysis, processing 10M+ data points daily

·Developed custom finetuning pipelines for domain specific financial risk assessment models

·Deployed high performance LLM serving using VLLM, SGLang, and TensorRTLLM for handling 1000+ concurrent requests, reducing inference latency by 70% and cutting infrastructure costs by 45%

Technical Leadership:

·Led development of scalable SaaS architecture capable of serving 10,000+ concurrent users, achieving 99.93% uptime

·Designed microservices architecture with event driven communication patterns deployed on Vercel and AWS ECS, enabling 50% faster feature deployments and 75% reduction in deployment failures

·Developed automated compliance features using AI for regulatory reporting, ensuring 100% audit trail accuracy

·Effective communicator for nontechnical stakeholders, translating complex backend workflows into business value, resulting in 25% faster project approvals and stakeholder buy-in

·Mentored junior developers in AI/ML best practices with modern, secure workflows, increasing team velocity by 40%

Technologies: Python, NextJS, LangChain, LangSmith, VLLM, TensorRTLLM, PostgreSQL, Redis, Celery, Docker, AWS ECS, Vercel

Full Stack A.I Integration Architect GH: MentorMirror AI Powered Writing Assistant Jul 2025

AI Pipeline Development:

·Built LangChain based AI pipeline for style analysis and text rewriting, processing 100+ documents with 95% style matching

·Implemented LangGraph workflows for multistep ingestion, reducing processing errors by 80%, enabling parallel processing

·Created LangSmith monitoring for AI model performance and prompt optimization, achieving 30% cost reduction

·Developed ETL processes with Serverless Functions for resilient content scraping and analysis, achieving 99.9% uptime

Technical Features:

·Text to Speech integration using ElevenLabs API for voice playback, supporting 20% languages with 98% pronunciation accuracy

·Realtime progress tracking with animated UI, providing 100% visibility and reducing manual categorization time by 85%

·Automated author inference using ChatGPT AI for content analysis, achieving 90% accuracy by identifying writing styles

·Mentor database management with JSON based storage and validation, managing 12+ mentor profiles with 100% data integrity

Technologies: Python, PyQt6, LangChain, LangGraph, LangSmith, LM Studio, OpenAI API, Google AI, ElevenLabs API, Render

Education

Computer Programming Seneca College Sep 2014 – May 2016

Founder of Entrepreneurial Programmers Club

Languages

English Native

Russian Native

Mandarin Learning

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