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I’m a Senior Full Stack Engineer with over 8 years of experience building scalable web platforms, integrating CRM and ERP systems, and developing AI-powered solutions. My expertise lies in Node.js, React, Python, and AWS cloud technologies, enabling me to deliver end-to-end SaaS and enterprise-grade applications enriched with modern CI/CD pipelines and serverless architectures. Passionate about automating business processes and bridging client needs with pragmatic solutions, I thrive on designing consultative, cloud-native transformations involving third-party integrations such as Stripe and Twilio, while ensuring application performance, scalability, and compliance with standards like GDPR and SOC2.…I’m a Senior Full Stack Engineer with over 8 years of experience building scalable web platforms, integrating CRM and ERP systems, and developing AI-powered solutions. My expertise lies in Node.js, React, Python, and AWS cloud technologies, enabling me to deliver end-to-end SaaS and enterprise-grade applications enriched with modern CI/CD pipelines and serverless architectures. Passionate about automating business processes and bridging client needs with pragmatic solutions, I thrive on designing consultative, cloud-native transformations involving third-party integrations such as Stripe and Twilio, while ensuring application performance, scalability, and compliance with standards like GDPR and SOC2.

Piotr Dziurewicz

Full Stack Developer, Developer, Programmer, +7

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I’m a Senior Full Stack Engineer with over 8 years of experience building scalable web platforms, integrating CRM and ERP systems, and developing AI-powered solutions. My expertise lies in Node.js, React, Python, and AWS cloud technologies, enabling me to deliver end-to-end SaaS and enterprise-grade applications enriched with modern CI/CD pipelines and serverless architectures. Passionate about automating business processes and bridging client needs with pragmatic solutions, I thrive on designing consultative, cloud-native transformations involving third-party integrations such as Stripe and Twilio, while ensuring application performance, scalability, and compliance with standards like GDPR and SOC2.…I’m a Senior Full Stack Engineer with over 8 years of experience building scalable web platforms, integrating CRM and ERP systems, and developing AI-powered solutions. My expertise lies in Node.js, React, Python, and AWS cloud technologies, enabling me to deliver end-to-end SaaS and enterprise-grade applications enriched with modern CI/CD pipelines and serverless architectures. Passionate about automating business processes and bridging client needs with pragmatic solutions, I thrive on designing consultative, cloud-native transformations involving third-party integrations such as Stripe and Twilio, while ensuring application performance, scalability, and compliance with standards like GDPR and SOC2.

Available to hire

I’m a Senior Full Stack Engineer with over 8 years of experience building scalable web platforms, integrating CRM and ERP systems, and developing AI-powered solutions. My expertise lies in Node.js, React, Python, and AWS cloud technologies, enabling me to deliver end-to-end SaaS and enterprise-grade applications enriched with modern CI/CD pipelines and serverless architectures.

Passionate about automating business processes and bridging client needs with pragmatic solutions, I thrive on designing consultative, cloud-native transformations involving third-party integrations such as Stripe and Twilio, while ensuring application performance, scalability, and compliance with standards like GDPR and SOC2.

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Work Experience

Senior Full Stack Engineer at IBM

July 1, 2025 - September 2, 2025

Designed and delivered CRM and ERP-style applications using Node.js (Nest.js/Express), React with TypeScript, and AWS CDK. Automated business processes with serverless workflows including AWS Lambda, Step Functions, and SQS, integrated AI-driven solutions using OpenAI and LangChain. Developed REST and GraphQL APIs with third-party service integrations like Stripe, Firebase, Twilio, and HubSpot. Led microservices deployments on AWS ECS and Kubernetes with Terraform and AWS CDK automation. Optimized databases including PostgreSQL, MySQL, MongoDB, and DynamoDB for scale and performance. Implemented enterprise authentication and authorization protocols (OAuth2, JWT, RBAC, SSO). Collaborated closely with business teams to design tailored technical solutions. Mentored engineers and enforced TDD/BDD practices using Jest, Cypress, and PyTest achieving over 85% test coverage. Enhanced CI/CD pipelines cutting deployment times by 40%, and supported multi-cloud strategies across AWS and Azure ensu

Senior Full Stack Engineer | Data Engineer at IBM

July 1, 2025 - August 28, 2025

At IBM, I designed and built production Spark and PySpark ETL pipelines managing terabyte-scale structured and unstructured data with optimizations improving job times by over 35%. I developed an LLM-powered support suite integrating various AI providers, reducing handling time by 55% and enhancing customer satisfaction. I delivered a RAG chatbot serving over 2 million users with multilingual query capabilities and secured internal knowledge base retrieval. I architected modular FastAPI microservices using gRPC, containerized with Docker and orchestrated on AWS EKS for scalable workloads. PostgreSQL, MongoDB, and Redis optimizations cut latency by 70% for high throughput loads. I led automation of ML workflows using Airflow and MLflow for tracking and rollout governance. Developed AI recommenders boosting user engagement significantly through A/B tests and implemented GraphQL and REST APIs powering investor-style analytics dashboards. I also introduced real-time monitoring dashboards,

Senior Full Stack Engineer | Data Engineer at IBM

July 1, 2025 - August 28, 2025

Led the design and implementation of Spark and PySpark ETL pipelines for terabytes of structured and unstructured data, optimizing for real-time analytics. Developed LLM-powered support suites integrating OpenAI, Anthropic, and Hugging Face, which reduced average handling time by 55% and improved customer satisfaction. Delivered RAG chatbots serving over 2 million users with secure multilingual Q&A. Architected modular microservices using FastAPI and gRPC, containerized and orchestrated on AWS EKS. Tuned databases and caching layers reducing latency by 70%. Automated ML workflows with Airflow and MLflow for tracking and governance. Built AI-driven recommendation systems lifted engagement significantly. Developed GraphQL and REST APIs driving analytics dashboards and investor-style deal matching using vector search and classical ranking techniques. Led CI/CD and infrastructure as code initiatives, improving deployment efficiency and incident response. Ensured GDPR compliance for data lo

Senior Full Stack Engineer at IBM

July 1, 2025 - August 13, 2025

Led architecture and development of a high-traffic fintech platform leveraging Next.js, Node.js, TypeScript, and GraphQL, achieving 99.9% uptime and scaling to over 2 million users. Designed microservices backend with Node.js, Express, and MongoDB reducing API response time by 35%. Migrated monolithic applications to AWS cloud-native microservices cutting infrastructure costs by 25%. Developed server-side rendered React apps improving SEO and organic traffic by 40%. Automated CI/CD pipelines with GitHub Actions and Terraform, decreasing release cycle from 2 weeks to 5 days. Integrated secure third-party payment and authentication systems using OAuth2 and JWT. Implemented real-time data streaming with WebSockets and Redis Pub/Sub. Mentored junior developers and established high test coverage with Jest and Supertest. Championed Kubernetes container orchestration and optimized database performance with PostgreSQL and Redis caching. Initiated logging and monitoring with Prometheus and Graf

Senior Full Stack Engineer at IBM

July 1, 2025 - August 13, 2025

Led architecture and development of a high-traffic fintech platform using Next.js, Node.js, TypeScript, and GraphQL achieving 99.9% uptime and scaling to over 2 million users. Designed microservices backend with Node.js, Express, and MongoDB, reducing API response time by 35%. Migrated legacy monolithic apps to cloud-native microservices on AWS, cutting infrastructure costs by 25%. Developed server-side rendered React apps for SEO and performance improvements, increased organic traffic by 40%. Automated build and deployment pipelines using GitHub Actions and Terraform, decreasing release cycle from 2 weeks to 5 days. Integrated third-party payment gateways and secure OAuth2 and JWT authentication. Implemented real-time data streaming with WebSockets. Mentored junior developers and raised test coverage to 85%. Championed container orchestration with Kubernetes, optimized PostgreSQL and Redis caching, and set up monitoring with Prometheus and Grafana. Managed Agile Scrum ceremonies and e

Senior Full Stack Engineer at IBM

July 1, 2025 - August 8, 2025

Led full-stack development of an AI-powered customer support platform using React, FastAPI, and OpenAI APIs, reducing average response time by 55%. Built and deployed LLM-based retrieval-augmented generation (RAG) chatbot using LangChain and Pinecone, supporting multi-language FAQs. Designed modular microservices architecture with FastAPI, deployed via Docker and Kubernetes to AWS EKS. Integrated OpenAI, Anthropic Claude, and Hugging Face models to support context-aware text generation. Engineered vector database search with FAISS for semantic recommendations in an e-commerce client project. Implemented CI/CD pipelines using GitHub Actions and Terraform, reducing deployment times by 40%. Created custom analytics dashboard in React with D3.js, aggregating real-time usage metrics via WebSockets. Mentored 5+ engineers and led peer code review initiatives, increasing team velocity by 30%. Developed backend modules for user profiling and authentication (OAuth2, JWT) in a healthtech app. Opt

Senior Full Stack Engineer at IBM

July 1, 2025 - August 8, 2025

Led AI-centric internal tool development integrating OpenAI GPT models to improve customer support by 35%. Mentored juniors on React, Python, and AI best practices. Developed AI-powered apps using LangChain for orchestrating workflows with vector stores and third-party tools. Designed responsive React and Tailwind CSS UIs with a consistent design language and accessibility. Enabled real-time AI interactions with WebSockets and async endpoints, boosting responsiveness by 30%. Collaborated with ML teams on deploying GPT pipelines, instrumented telemetry, and created reusable LangChain workflows. Handled PostgreSQL data modeling for high-traffic systems, deployed serverless apps via AWS Lambda, and built modular React component libraries with Storybook. Established RESTful/GraphQL APIs, implemented extensive testing with Jest and PyTest, and developed CI/CD pipelines with Docker and GitHub Actions. Conducted technical interviews and enforced clean code principles across large codebases.

Senior Full Stack Engineer at IBM

July 1, 2025 - August 5, 2025

Led AI-powered internal tool development by integrating OpenAI's GPT models, boosting customer support efficiency by 35%. Mentored junior developers on React, Python, API development, and AI integration. Created AI-enhanced applications with LangChain to orchestrate LLM workflows, designed responsive UIs using React and Tailwind CSS, and enabled real-time AI interactions through WebSockets, improving responsiveness by 30%. Optimized frontend performance by 40% via code splitting and lazy loading. Collaborated with ML teams to deploy GPT pipelines and instrumented telemetry to monitor AI usage. Developed APIs with Node.js and Python, implemented CI/CD pipelines with Docker and AWS services, and contributed to hiring and internal documentation to promote scalable AI-driven full-stack solutions.

Senior Full Stack Engineer at IBM

July 1, 2025 - August 5, 2025

Developed scalable web platforms for finance and healthcare clients using Java Spring Boot and Angular. Built and deployed microservices with high throughput and low latency, and designed modular frontend architectures with Angular and RxJS. Created REST APIs secured with OAuth2 and JWT integrated with Azure AD B2C. Led legacy monolith refactoring into microservices using PostgreSQL and Redis. Introduced automated testing strategies and improved CI/CD pipelines with GitLab for automated deployment with rollback and canary releases. Managed Azure Kubernetes Service migration using Helm and Terraform and optimized performance monitoring with SonarQube and New Relic. Mentored junior engineers, led code reviews, and collaborated with UI/UX teams to deliver pixel-perfect enterprise dashboards. Provided production incident triage, ensuring 99.99% uptime SLAs and integrated third-party APIs for real-time event tracking.

Full Stack Developer at Akamai Technologies

May 1, 2022 - September 2, 2025

Built Node.js backends with Express and React UIs for dashboards, subscription SaaS, and ERP extensions. Migrated monolithic applications to microservices using AWS, Docker, and Kubernetes. Designed RESTful APIs and integrated CRM connectors for enterprise clients. Developed Python data pipelines for analytics and AI-driven automation. Implemented Redis caching and optimized queries for PostgreSQL and MySQL achieving sub-second API responses. Automated CI/CD pipelines with GitHub Actions and Jenkins and introduced environment promotion pipelines. Developed real-time features using WebSockets and Server-Sent Events. Collaborated with product managers and UX teams to improve usability and delivered mission-critical applications with 99.99% uptime.

Full Stack Developer | AI Developer at Akamai Technologies

May 1, 2022 - August 28, 2025

In my role at Akamai, I developed Spark and PySpark pipelines to process financial and network datasets ensuring scalability and fault tolerance. I delivered document classification models with 92% accuracy productionized in Docker containers. Implemented real-time data ingestion pipelines with Python, Pandas, and SQL with streaming and SLA monitoring. Designed GraphQL gateways consolidating cross-service data reducing latency by 45%. Launched interactive predictive analytics dashboards for stakeholders using R Shiny and React. Deployed services on AWS ECS with hardened container images and network policies. Improved CI pipelines with unit and end-to-end test gates, increased test coverage from 35% to 85% using PyTest, Cypress, and Jest. Executed GDPR anonymization and lineage documentation for compliance.

Full Stack Developer | AI Developer at Akamai Technologies

May 1, 2022 - August 28, 2025

Built Spark/PySpark pipelines for large financial and network datasets ensuring durability and fault tolerance. Developed and productionized document classification models with 92% accuracy using Scikit-learn and PyTorch. Implemented real-time data ingestion and streaming with strict SLA monitoring. Designed GraphQL gateways reducing cross-service latency by 45%. Delivered predictive analytics dashboards using R Shiny and React. Managed AWS ECS deployments and container security. Improved CI pipelines with GitLab for better release cadence. Optimized Spark workloads to reduce compute costs. Raised test coverage significantly through comprehensive automated testing. Implemented GDPR anonymization and data lineage documentation for compliance.

Full Stack Developer at Akamai Technologies

May 1, 2022 - August 13, 2025

Developed and maintained enterprise web applications with React, Node.js, and TypeScript focusing on reusable and modular components. Built scalable REST APIs integrated with PostgreSQL via TypeORM. Led frontend migration from AngularJS to React and Next.js, reducing load times by 50%. Implemented CI/CD pipelines using Jenkins and Docker enabling automated testing and deployments. Integrated AWS cloud storage and serverless functions (S3 and Lambda). Collaborated with UX designers to translate wireframes into responsive and accessible UI components. Applied security best practices including OAuth2 and JWT management. Managed complex client state with Redux and Context API and optimized frontend performance with lazy loading, code splitting, and memoization. Created unit and E2E tests with Jest and Cypress to improve regression coverage. Participated in client workshops for requirement alignment.

Full Stack Developer at Akamai Technologies

May 1, 2022 - August 13, 2025

Developed and maintained enterprise-grade web applications using React, Node.js, and TypeScript with focus on modular components. Built REST APIs with Express and PostgreSQL integration using TypeORM. Led frontend migration from AngularJS to React and Next.js improving load times by 50%. Implemented CI/CD pipelines using Jenkins and Docker. Integrated cloud storage and serverless functions using AWS S3 and Lambda. Worked with UX designers to create responsive UI. Applied security best practices such as OAuth2 and JWT. Managed state with Redux and React Context API. Optimized frontend performance through lazy loading and memoization. Created unit and E2E tests improving regression coverage. Participated in workshops to align technical solutions with business goals.

Full Stack Developer at Akamai Technologies

May 1, 2022 - August 8, 2025

Developed client dashboards using React with backend APIs in Django Rest Framework. Integrated AI classification models for automated document tagging with 92% accuracy. Built ETL pipelines to process financial datasets using Pandas and loaded into PostgreSQL. Used Docker Compose for local dev environments; production apps hosted on AWS ECS. Implemented unit and integration tests with Pytest and Cypress, increasing test coverage from 35% to 85%. Created custom CI pipeline in GitLab CI for frontend and backend deployments. Integrated Contentful headless CMS for dynamic product pages editable by marketing teams. Built GraphQL layer using Graphene to streamline data fetching between microservices. Participated in client workshops and agile ceremonies with distributed teams. Optimized React rendering performance using memoization, code splitting, and lazy routes.

Full Stack Developer at Akamai Technologies

May 1, 2022 - August 8, 2025

Developed and maintained high-traffic customer-facing dashboards servicing over 1 million daily requests using React and Express.js. Integrated ML-based anomaly detection for network traffic leveraging Python and scikit-learn. Migrated systems from legacy monolith to Docker and Kubernetes-powered microservices. Improved API performance by 60% with optimized database queries and caching layers such as Redis. Automated CI/CD with Jenkins and GitHub Actions. Collaborated with UX teams on redesigns that increased customer satisfaction. Built GraphQL API gateways unifying microservices and implemented robust enterprise security with RBAC and audit logging. Created internal CLI tools in Python to automate DevOps and QA processes.

Full Stack Developer at Akamai Technologies

May 1, 2022 - August 5, 2025

Developed and maintained React and Express.js customer-facing dashboards handling over 1 million daily requests. Integrated machine learning anomaly detection for network traffic using Python and scikit-learn. Migrated legacy monolith to microservices architecture with Docker and Kubernetes. Improved API response times by 60% through query optimization and caching. Automated CI/CD pipelines and collaborated with UX teams to increase customer satisfaction by 25%. Built GraphQL gateways and implemented role-based access control and audit logging for enterprise security. Created Python CLI tools to automate DevOps and QA processes.

Full Stack Developer at Akamai Technologies

May 1, 2022 - August 5, 2025

Delivered end-to-end financial dashboards and customer portals using Java Spring Boot and Angular. Developed and secured RESTful APIs with Spring Security and role-based access control. Utilized AWS services including EC2, S3, RDS, and Lambda for backend infrastructure and event-driven workflows. Created dynamic responsive SPAs with Angular and SCSS improving UX on multiple platforms. Containerized services with Docker and orchestrated multi-stage Jenkins CI/CD pipelines. Optimized SQL queries and stored procedures for MySQL transactional workloads. Integrated third-party financial data providers with Redis caching. Conducted unit and integration testing to maintain 75% code coverage and participated in peer code reviews and architectural planning. Maintained monitoring and alerting via CloudWatch and Sentry.

Full Stack Developer at ALTEN

February 28, 2019 - August 8, 2025

Delivered custom web portals integrating IoT data streams with live dashboards for manufacturing clients. Developed RESTful APIs using Node.js and Flask providing data to React SPAs. Designed industrial telemetry visualization tools using D3.js and Chart.js. Led frontend modernization by migrating from jQuery to React, reducing maintenance costs by 50%. Built automated UI test suites using Selenium and Mocha. Integrated Firebase Authentication and Firestore for real-time data syncing. Coordinated with embedded systems engineers on sensor hardware integration. Designed CI/CD pipelines with CircleCI and Docker, introduced Agile/Scrum methodologies, and acted as Scrum Master for two release cycles. Reduced technical debt by auditing code and adopting TypeScript best practices.

Full Stack Developer at ALTEN

February 1, 2019 - September 2, 2025

Developed CRM and ERP web portals with Node.js, React, Python, and PHP (Symfony). Integrated third-party APIs including payment and messaging services. Automated deployments via CircleCI and Docker and enforced quality assurance pipelines. Created data visualizations using Chart.js and D3.js for business reporting. Supported IoT integrations by exposing telemetry data through REST APIs. Introduced monorepo structures with Nx and TurboRepo for consistent frontend and backend delivery. Delivered secure authentication and authorization using OAuth2 and JWT.

Full Stack Developer at ALTEN

February 1, 2019 - August 28, 2025

At ALTEN, I built data services using Flask and Spark focused on HR and finance analytics and migrated legacy PHP solutions to Python for better maintainability. Developed RESTful integrations with third-party HR tools standardizing authentication and rate limiting. Introduced asynchronous processing using Celery and Redis. Tuned MySQL and PostgreSQL queries for optimized reports. Created management visuals using R and automated reporting workflows. Implemented testing frameworks and linting to raise code quality standards. Deployed applications using Jenkins with scripted blue/green rollout strategies. Enhanced frontend validation with jQuery and Bootstrap and integrated R-powered charts. Collaborated with analysts to define KPIs and formalize data contracts. Documented APIs and data workflows for improved onboarding experiences.

Full Stack Developer at ALTEN

February 1, 2019 - August 28, 2025

Developed data services with Flask and Spark for HR and finance analytics. Migrated legacy PHP codebases to Python improving maintainability. Built REST integrations with third-party HR tools standardizing authentication and rate limiting. Introduced asynchronous processing with Celery and Redis. Tuned MySQL and PostgreSQL performance for reporting workloads. Produced management visualizations with R and automated reporting. Established test frameworks using PyTest and Mocha to improve code quality. Managed deployments using Jenkins and scripted blue/green rollouts. Enhanced frontend validations and integrated R-powered charts. Collaborated with analysts defining KPIs and data flows. Documented APIs for faster onboarding.

Full Stack Developer at ALTEN

February 1, 2019 - August 13, 2025

Assisted development of Node.js backend services and React frontend components under senior supervision. Contributed to API development and third-party service integrations using REST. Maintained legacy codebases and supported debugging tasks. Created automated tests with Mocha and Chai to increase reliability. Participated in Agile team ceremonies and collaborated closely with QA. Documented development processes and internal knowledge base. Supported migration from PHP backend to Node.js microservices. Gained hands-on experience with AWS EC2 and S3 cloud fundamentals. Improved frontend usability with CSS and HTML5 refinements. Assisted Docker containerization for development environments.

Full Stack Developer at ALTEN

February 1, 2019 - August 13, 2025

Assisted development of Node.js backend services and React frontend components under supervision. Contributed to API development and third-party integrations. Maintained and debugged legacy codebases. Created automated test scripts with Mocha and Chai. Participated in Agile ceremonies and collaborated with QA. Documented development processes. Supported migration from PHP backend to Node.js microservices. Gained hands-on cloud experience with AWS EC2 and S3. Improved frontend usability with CSS and HTML5. Assisted in Docker containerization for development.

Full Stack Developer at ALTEN

February 1, 2019 - August 8, 2025

Contributed to internal Flask-based web tool for managing contractor time tracking. Designed REST APIs and integrated 3rd-party HR tools via webhooks and API tokens. Maintained MySQL databases, created stored procedures, and fine-tuned queries. Set up job schedulers using Celery and Redis for asynchronous email notifications. Deployed applications on on-premise servers using Jenkins pipelines and bash scripts. Participated in unit test coverage expansion, raising legacy app coverage from 20% to 75%. Implemented frontend validation and improved UX with jQuery and Bootstrap. Documented API endpoints using Swagger/OpenAPI for internal teams. Assisted in porting legacy PHP code to Flask microservices. Engaged in bi-weekly sprints and agile collaboration best practices.

Full Stack Developer at ALTEN

February 1, 2019 - August 5, 2025

Delivered custom web portals integrating IoT data streams with live dashboards for manufacturing clients. Created RESTful APIs using Node.js and Flask, and crafted data visualization tools with D3.js and Chart.js. Led frontend migration from jQuery to React, reducing maintenance costs by 50%. Developed automated UI test suites using Selenium and Mocha, implemented Firebase Authentication and Firestore for real-time syncing, and collaborated with embedded systems engineers. Designed CI/CD pipelines using CircleCI and Docker, led Agile/Scrum adoption as Scrum Master, and reduced technical debt through code audits and TypeScript best practices.

Full Stack Developer at ALTEN

February 1, 2019 - August 5, 2025

Contributed to modernization of internal tools for logistics client by upgrading legacy Java and AngularJS systems. Developed backend modules using Spring MVC integrated with Oracle databases. Enhanced frontend features improving usability and visual consistency with AngularJS. Participated in API integration with courier and inventory management systems. Collaborated with QA for test plans and bug resolution. Introduced unit testing culture with JUnit and Mockito. Participated in Scrum ceremonies and optimized build pipelines using Maven and Jenkins. Migrated version control systems from SVN to Git and helped onboard junior developers through documentation and mentorship.