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Dennis – Python, React, Typescript, experts in Lemon.io

Dennis

From Romania (UTC+3)

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Full-stack Web DeveloperSenior
9 years of commercial experience
Advertising
Analytics
Cloud computing
Design
Fintech
AI software
Platforms
SaaS
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Dennis – Python, React, Typescript

Experienced Senior Software Engineer with over eight years of expertise in building scalable and secure applications. Specializing in Python, React, TypeScript, and AWS, he has a strong background in cloud development, automation, and AI-driven solutions. With a results-oriented approach, he excels at optimizing complex systems, streamlining development processes, and delivering high-impact solutions. Open-minded and proactive, he brings both technical excellence and strong communication skills, making him a valuable asset to any team.

Main technologies
Python
8 years
React
5 years
Typescript
5 years
AWS
6 years
Django
8 years
Additional skills
FastAPI
Jenkins
GitHub
Datadog
GitLab CI/CD
Ansible
Terraform
AI
Agile
Kubernetes
Chat bots
NoSQL
Flask
WordPress
Docker
pytest
Jira
REST API
GitLab
Microsoft Azure
MongoDB
PostgreSQL
Redis
LLM
ElasticSearch
JavaScript
Kafka
PHP
Apache Kafka
Firebase
Ready to start
ASAP
Direct hire
Potentially possible
Ready to get matched with vetted developers fast?
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Experience Highlights

Senior Software Engineer
Feb 2022 - Ongoing3 years 1 month
Project Overview

The next generation of Virtual Desktop Infrastructure (VDI) technology, leveraging cloud infrastructure to provide seamless and secure access to resources for thousands of internal users anytime, anywhere.

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Responsibilities:
  • Contributed to a specialized team focused on advancing cloud virtualization capabilities using OCI resources;
  • Led the CI/CD deployment strategy, including VM provisioning, resource allocation, security automation, and virtual cloud network administration;
  • Designed and implemented a major architectural redesign leveraging burstable vOCPU/OCPU technology, reducing resource costs by 40% year-over-year;
  • Streamlined VM resource allocation and network configuration using Terraform;
  • Automated user provisioning, application installation, and bulk VM configurations with Ansible;
  • Worked with the Linux kernel to enable VM deployment on ARM and AMD architectures;
  • Managed deployment automation, source control, and repository management;
  • Tracked bugs, resolved issues, and implemented cost and efficiency improvements using Jira based on direct user feedback;
  • Documented implementation strategies in Confluence, contributed to team knowledge sharing and participated in hiring and training new team members.
Project Tech stack:
React
Python
Ansible
Terraform
GitHub
GitLab CI
CD
Jenkins
Typescript
Datadog
asyncio
Kubernetes
Docker
PostgreSQL
WebSocket
Redis
LLM
API
CI
CD
ElasticSearch
Kafka
Microservices
JavaScript
CTO
Dec 2018 - Ongoing6 years 3 months
Project Overview

This project was launched to empower small and medium-sized businesses with innovative web design and development, strategic consulting, and high-impact digital advertising. The focus spans multiple platforms, including Google Ads and TikTok Ads, ensuring businesses maximize their online presence and growth potential. The mission was to elevate Romania's software quality and drive digital transformation.

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Responsibilities:
  • Demonstrated initiative and drive by supporting small and medium-sized businesses with cutting-edge digital strategies;
  • Leveraged deep business insights to offer innovative web design, development, and targeted digital advertising solutions;
  • Embraced modern digital tools and platforms to deliver impactful and high-quality software solutions;
  • Tailored digital strategies to meet diverse business needs, ensuring each client received personalized and effective support.
Project Tech stack:
WordPress
AWS
Adobe Creative Suite
Product design
UI
UX
PHP
JavaScript
CSS
Tailwind CSS
Senior Software Engineer
Jun 2023 - Jan 20251 year 7 months
Project Overview

The project is focused on developing a new SaaS platform designed to simplify financial reporting and compliance. The platform enables businesses to efficiently draft large and complex documents required for launching an Initial Public Offering (IPO) on the New York Stock Exchange, leveraging cutting-edge technology and deep industry expertise to streamline the process.

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Responsibilities:
  • Developed scalable REST APIs using Python, FastAPI, and Pydantic, leveraging asyncio for high concurrency for a live, multilayer document-editing platform;
  • Designed and maintained cloud infrastructure on Microsoft Azure, utilizing Azure DevOps to build robust CI/CD pipelines with GitLab, Jenkins, Docker, and Docker Compose;
  • Engineered efficient data management solutions with MongoDB and Cursor, ensuring high-performance storage and retrieval of data;
  • Implemented comprehensive testing and monitoring frameworks using pytest and Datadog to ensure code quality and system reliability;
  • Collaborated in an Agile team, utilizing Jira for task management and Confluence for process documentation to drive continuous improvement and effective project delivery.
Project Tech stack:
Python
FastAPI
Microsoft Azure
Azure DevOps
asyncio
MongoDB
GitLab
Docker
Jenkins
Agile
Confluence
Jira
REST API
pytest
Datadog
Docker Compose
Cursor
PyCharm
Pydantic
WebSocket
Redis
Highcharts
LLM
API
CI
CD
Apache Kafka
RabbitMQ
Microservices
Senior Software Engineer - Tech Lead
Feb 2021 - Dec 20232 years 10 months
Project Overview

The project focused on designing and implementing a national governmental cloud infrastructure to modernize public sector services. It included developing AI-powered chatbots to improve citizen interactions, reduce costs, and enhance efficiency across governmental departments. The solution optimized automation, data management, and accessibility, driving the digital transformation of public services.

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Responsibilities:
  • Led a team of 3 developers in creating scalable cloud-based SaaS platforms for government clients, ensuring efficient project delivery and strong communication within the team;
  • Oversaw the full software development lifecycle, from gathering technical and business requirements to successful project implementation and maintenance;
  • Delivered AI-powered solutions, including chatbots and intelligent document management systems, for both government and non-government clients;
  • Managed and executed software projects for multinational corporations and government bodies, achieving significant improvements in customer retention (90%) and streamlining development processes;
  • Applied Agile and Scrum methodologies to ensure project alignment with client goals and timely delivery of milestones;
  • Conducted penetration testing to identify and address security issues in existing applications, mitigating OWASP vulnerabilities;
  • Managed server architecture, worked with containerization technologies and cloud platform architecture.
Project Tech stack:
Python
FastAPI
Django
Django REST
Flask
React
Typescript
NoSQL
Oracle SQL Developer
Ansible
Terraform
Agile
AI
Chat bots
Kubernetes
Docker
Confluence
Jira
JavaScript
Microservices
RabbitMQ
ElasticSearch
CI
CD
LLM
Redis
Vercel
WebSocket
PostgreSQL

Education

2017
Computer Science
B.Sc. (HONS)

Languages

Romanian
Advanced
English
Advanced

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