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@wiktorjin
Senior Full Stack Engineer with 8+ years of experience.
I'm a Senior Full Stack Engineer based in Warsaw with over 8 years of experience in building scalable web applications. My expertise lies in Python, Django, FastAPI, and modern JavaScript frameworks like React and Next.js. I have successfully led projects that include financial analytics platforms and geospatial dashboards, demonstrating my ability to deliver high-quality solutions in agile environments.
Throughout my career, I've developed and maintained robust backend APIs, optimized database queries, and implemented serverless architectures on AWS. My commitment to clean code and team mentorship has been instrumental in driving project success and fostering a collaborative work environment. I thrive on challenges and continuously seek opportunities to enhance my skills and contribute to innovative projects.
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Work history, roles, and key accomplishments
Netguru
Apr 2024 - Present (1 year 7 months)
Developed and maintained scalable backend APIs in Python using Django and FastAPI for a real-time financial analytics platform, handling ~250K daily trades and margin calculations. Designed PostgreSQL schemas and optimized complex reporting queries, reducing data fetch times for daily and historical dashboards by 40%.
Mapped
Feb 2023 - Present (2 years 9 months)
Engineered TypeScript/Express microservices to unify location metadata from 5 internal APIs, boosting data accuracy in location search by 25%. Led front-end development using React/Next.js for a live geospatial dashboard, integrating Mapbox GL and Chart.js to display multi-layer heatmaps updated in real time.
Andela
Apr 2021 - Present (4 years 7 months)
Designed and implemented backend systems in Python/Django REST Framework to manage user profile matching, team invites, and messaging workflows, scaling to support the placement of 10,000+ engineers. Developed a profile-scoring engine using a weighted algorithm, improving candidate-to-project match accuracy by 35%.
Asseco Poland
Sep 2019 - Present (6 years 2 months)
Developed enterprise-grade web apps for banking and insurance dashboards using React/Next.js, emphasizing secure design, cross-browser compatibility, and performance optimization. Architected a reusable component library styled with Tailwind CSS, accelerating frontend development across three major client projects.
MakoLab
Jul 2017 - Present (8 years 4 months)
Built Node.js/Express REST services and PostgreSQL databases to power product catalogs, shopping carts, and checkout systems for high-traffic e-commerce platforms. Created real-time data sync pipelines linking MySQL, Elasticsearch, and Redis using Python and Bash scripts, enabling sub-second search and filtering for users.
Degrees, certifications, and relevant coursework
Bachelor of Science, Computer Science
2013 - 2017
Completed a Bachelor of Science in Computer Science. The curriculum covered core computer science principles and programming.
Software and tools used professionally
OpenAPI
Chart.js
GitHub
GitLab
Kubernetes
Docker Compose
Jenkins
GitHub Actions
GitLab CI
PostGIS
MySQL
PostgreSQL
MongoDB
Gmail
Node.js
Django
Next.js
NestJS
.NET
Tailwind CSS
Redis
Terraform
Jira
axios
JavaScript
Java
ES6
Kotlin
Loki
Mapbox
Django REST framework
FastAPI
Grafana
Prometheus
GraphQL
gRPC
Elasticsearch
AWS Lambda
Serverless
pytest
OAuth2
sso
NGINX
dockerized
Mapped
SQL
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