leszczynski.biz
Hero Background

Technical Lead Delivery & Platform Engineering

Driving Complex Web Products from Strategy to Execution

See my work

About Me

I am a Technical Lead with over 15 years of experience in building and delivering complex web platforms, combining a strong engineering background with strategic leadership and delivery ownership.

My career started in hands-on software development (.NET, React/Next.js), and naturally evolved toward leading teams, shaping technical strategy, coordinating delivery, and acting as a bridge between business stakeholders and engineering teams.

I am particularly effective in environments where technology is core to the business: platform development, SaaS products, headless CMS ecosystems, and data-driven web applications.

Jakub Leszczynski

Tech Stack

ReactReact
Next.jsNext.js
Tailwind CSSTailwind CSS
HTML5HTML5
CSS3CSS3
JavaScriptJavaScript
TypeScriptTypeScript
ASP.NET CoreASP.NET Core
C#C#
SQL Server
MongoDBMongoDB
DockerDocker
KubernetesKubernetes
AWSAWS
AzureAzure
GCPGCP
CloudflareCloudflare
GitLab CIGitLab CI
GitHub ActionsGitHub Actions
JestJest
CypressCypress
Claude AIClaude AI
OpenAIOpenAI
GeminiGemini

Certificates

AWS Certified Cloud Practitioner

Amazon Web Services

Selected Projects

iKONGRES

A system for registering participants and automating processes related to the organisation of events and conferences.

MBA Portal

Portal about MBA studies in Poland, offering knowledge base and advice for candidates.

bluebirdCMS

Platform for building and managing content in e-commerce and marketing systems.

My Offer

Technical Lead
Delivery Manager
Technical Product Manager
Cloud Architect
AI Automation
Technical Advisory
Training & Mentoring

Contact Me