Experienced Developer Available for Hire

Full stack software engineer with 3 years experience designing and developing structured software systems.



Backend Development icon

Backend Development

Spring-based Java/Kotlin for REST and gRPC services. Postgre, Redis, Firestore DBs. Project configuration with Gradle.

Web Development icon

Web Development

Responsive websites in HTML5, CSS/SCSS. Rx/Redux-based React applications in ES6 JavaScript and Typescript.

Systems Programming icon

Systems Programming

Large C++ projects. Safe multithreaded code in Rust. Deep understanding of performant data structures and algorithms.

Mobile Development icon

Mobile Development

Dart/Flutter mobile apps for both iOS and Android. Stream-based BLoC state management. Firebase-powered backend.

UX Design icon

UX Design

Interactive app prototyping in Figma. Usability Testing with real users. Frequent iterations based on feedback.

Full Business Cycle icon

Full Business Cycle

Acquiring customers, gathering requirements, managing expectations, timely execution, long-term maintenance.


Portrait of Igor Kolotilin, Ph.D.

Dennis is an experienced web developer, with an insight into the nuances of modern website design and implementation, compatibility with different platforms/devices ...

Igor Kolotilin, Ph.D.
CSO & President of Solar Grants Biotechnology


Software Developer Intern


  • Currently working on Spring Boot microservices in digital platform team

Flutter Technical Editor

@ Razeware

Software Engineering Intern

@ Ultimate Software

  • Developed OAuth2 authorization microservices in identity platform team
  • Added custom permissions claim to JWT on critical ForgeRock identity gateway serving 51M users, refactored to prevent zero trust authorization recursion
  • Identified production-level architecture issue in event sourcing aggregate which would break future migrations, documented and escalated to tech lead
  • Java, Axon Framework, Spring, CQRS, event sourcing, ForgeRock IG

Freelance Developer

@ Solar Grants Biotechnology

  • Acquired customer, gathered requirements, managed customer expectations
  • Planned, designed, developed, released, and maintained sgbiotec.com, an online store selling lab-grade fluorescent proteins
  • Designed UI with structured product description and custom shopping cart, integrated with Shopify storefront API
  • React, MobX, Shopify storefront API

Freelance Developer

@ Pocket Trade Show

  • Created Pocket Trade Show, an online tradeshow platform that connects buyers and sellers
  • Developed web frontend using MVC pattern in PHP, implemented file upload to S3 bucket
  • Restructured MySQL database to accomadate web in addition to mobile app, migrated existing data
  • PHP 7, jQuery, MySQL, AWS S3


Bachelor of Computer Science

@ University of Waterloo

  • $2000 President’s Scholarship of Distinction scholarship for 95% admission average
  • Coursework: data structure analysis, OOP programming in C++, algorithm analysis, operating systems design, computer architecture