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Robert Deak - Senior Full-Stack Developer with 20 years of experience

Robert Deak

Available for Projects

Senior Full-Stack Developer

20+ Years Experience • React • Node.js • Python • AWS

Full-stack developer with 20 years of engineering experience, specializing in React, Node.js and Python. Experienced across all phases of software development—from shaping product requirements and user stories to implementation, testing, and CI/CD automation. Focused on building efficient, maintainable, and fault-tolerant applications while consistently delivering solutions that meet client needs.

Ready to discuss your project?

Core Competencies & Technical Skills

Frontend

10 years
React (Enterprise UIs, Component Libraries, Performance Optimization), Next.js, D3.js, Design-to-Code (Figma), Dynamic Data Visualization

Backend

20 years
Node.js, Python (FastAPI), API Design (REST, GraphQL, WebSockets), System Integration (Stripe, Xero, NetSuite), Legacy Migration (PL/SQL → Node.js), Microservices, Event-driven architectures

Databases

Expert
PostgresSQL, Oracle, MongoDB, Redis, Neo4j, Elasticsearch, SQL Query Optimization, OLAP analytics

Data Engineering

Advanced
ETL Pipelines, Federated Search Engine Design, Custom Relevance Scoring, Streaming large documents, Interactive analytics dashboards

DevOps & Cloud

Certified
AWS, Docker, Infrastructure as Code (Terraform), CI/CD (GitHub Actions, GitLab, CircleCI), Monitoring & Performance (Splunk, Kibana)

Methodologies

Expert
Agile, Design Patterns, Test-Driven Development, E2E Testing (Cypress.io), RBAC design, Component-driven development

Professional Experience

Pfizer

Pharmaceuticals
Key Achievements
  • Productized over a dozen machine learning models, driving multimillion-dollar cost reductions by automating complex decision-making processes at scale
  • Contributed to the development of a federated search engine with Google-like capabilities, delivering fast, seamless data retrieval across diverse and heterogeneous data sources
  • Architected and delivered a specialized molecular feasibility tracking application with integrated data visualizations that accelerated chemistry research workflows, significantly reducing brainstorming cycle times among research teams
  • Created an OLAP-based employee training tracking system, offering real-time insights into curriculum completion rates and improving department compliance
  • Engineered a dynamic workforce allocation system that optimizes employee assignment distribution across multiple divisions based on real-time availability, improving operational efficiency and resource utilization
  • Built a dynamic data exploration platform that allows users to map, sort, filter, and customize views of large datasets in real time, enhancing data accessibility and user autonomy
  • Developed data streaming API capable of generating and streaming large-scale documents, ensuring reliable delivery and low-latency performance under heavy load
  • Built advanced interactive data visualizations, empowering stakeholders to explore complex datasets intuitively and make data-driven decisions faster
  • Designed and implemented a robust Role-based Access Control (RBAC) system, enhancing platform security and enabling fine-grained user permissions management
  • Improved operational efficiency and data integrity by designing a real-time, event-driven architecture for a new internal monitoring tool
Tools & Technologies
AWSD3.jsDockerElasticsearchFastAPIGitHub ActionsGraphQLGurobiNeo4jNode.jsPostgresSQLPythonREST APIReactTerraformTypeScript

Cradle To Sky

AerospaceMVP
Key Achievements
  • Developed an optimized data architecture for material flow and inter-component integration, enabling users to complete equivalent work several months faster
  • Designed and implemented infrastructure as code (IaC) using Terraform to automate AWS provisioning, enabling repeatable, version-controlled environment management
  • Architected and launched a new project, establishing a scalable and maintainable foundation for future development
  • Built an end-to-end CI/CD pipeline with GitHub Actions, accelerating deployment workflows and shortening release cycles
Tools & Technologies
AWSDockerGitHub ActionsNext.jsPostgresSQLSocial AuthenticationTerraformTypeScript

iContainers

Logistics
Key Achievements
  • Migrated and refactored an entire component library to TypeScript, improving type safety, maintainability, and developer productivity
  • Integrated a wide range of core REST API endpoints to power essential business functionality and ensure seamless data flow across the application
  • Set up a full-featured development environment from scratch, following best practices—covering build tooling, linting, testing, Storybook, tracing, error handling, and project structure
  • Transformed dozens of Figma designs into well-structured, reusable React components, ensuring visual accuracy and responsive behavior
  • Streamlined the GitLab CI/CD pipeline for faster, more reliable deployments and introduced automated changelog generation to improve release transparency
  • Strengthened the testing strategy by enhancing coverage and implementing end-to-end testing with Cypress.io for critical user flows
Tools & Technologies
Cypress.ioGitLabPostgresSQLReactSentryTypeScript

IntelliQuit

HealthcareMVP
Key Achievements
  • Developed a REST API for processing and managing nicotine test image submissions
  • Applied an OpenCV algorithm to validate image content on the client side before uploading
  • Set up a project, and a streamlined deployment workflow

M3G Technology

Vehicle Towing Services
Key Achievements
  • Built a responsive front-end application that enables seamless customer communication through SMS
  • Integrated real-time messaging via WebSocket alongside REST API endpoints to ensure a reliable communication flow
  • Troubleshot and resolved critical issues in a legacy Angular codebase, improving stability and maintainability

Agility

Logistics
Key Achievements
  • Implemented key business features (taking orders, shipping, tracking)
  • Implemented GraphQL resolvers with Redis caching for long-term data storage and fast response times
  • Contributed to the refactoring and redesigning of a large React application for improved performance and maintainability

Battery Learning, Inc.

EducationMVP
Key Achievements
  • Designed full application architecture for a new learning platform
  • Built custom components for rich text editing and data visualization
  • Implemented a SCORM generator (2004 third Edition)

Rockpapr

FintechMVP
Key Achievements
  • Integrated the Xero API, Stripe API, and NetSuite API
  • Implemented the entire user onboarding
  • Dockerized Node.js and React applications with all the dependent services

Privredna Banka Zagreb, Intesa Sanpaolo Group

Banking
Key Achievements
  • Designed and implemented a highly scalable messaging service used by multiple customer facing applications
  • Created and implemented several key features into a application for corporate clients
  • Implemented and designed few payment processing features in corporate banking application

Siemens

Telecommunication
Key Achievements
  • Implemented several specific UI components for the Advantage platform
  • Created a tool for tracking component releases and creating a changelog
  • Assisted with integration testing for several internal systems

Dialog

ERP Software Vendor
Key Achievements
  • Created a B2B portal for local factory
  • Implemented a reporting module for a betting web application
  • Designed and implemented features on custom ERP solution

Languages & Professional Attributes

Languages

  • EnglishFluent (C1)
  • CroatianNative

Soft Skills & Leadership

  • Technical mentoring and knowledge sharing
  • Cross-functional team collaboration
  • Stakeholder communication and requirements gathering
  • Problem-solving and critical thinking
  • Self-motivated and deadline-driven

Education

Bachelor's degree in Economics

Financial Management

Faculty of Economics and Business (EFOS)

Osijek, Croatia

2008

Certifications

AWS Certified Developer – Associate

Amazon Web Services

August 2021

Oracle Advanced PL/SQL Developer Certified Professional

Oracle

August 2013

Oracle Database 11g: Program with PL/SQL

Oracle

December 2012

Oracle Database SQL Certified Expert

Oracle

June 2012

Let's Build Something Amazing Together

Available for consulting, contract work, and full-time opportunities. Let's discuss how I can help bring your project to life.