Jan Matejkov
Software Developer
11+ years exp
11+ years ML exp
Objective-C
Swift
TypeScript
Kotlin
Ruby
C
Python
SQL
JavaScript
Java
PHP
C#
Active 9 days ago
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Overview
Technical skills
Timeline
Roles
Overview
Senior software engineer with 11+ years of experience building production-grade iOS, web, and cloud applications. Strong hands-on background in SwiftUI with concurrency and modular architecture, plus enterprise backend and data engineering using Java, Python, Spring, Spark, Kafka, and Airflow. Delivered AI-enabled features using LLM/RAG and applied ML for recommendations and predictive analytics in distributed systems.
Technical skills
Objective-C
Swift
TypeScript
Kotlin
Ruby
C
Python• Senior • 11y+
SQL• Middle • 11y+
JavaScript• 11y+
Java• Middle • 11y+
PHP• 11y+
C#• Junior • 7y+
Swift
Swift Concurrency
Kotlin
Mockito• 11y+
Ruby
RSpec• 11y+
Ruby on Rails• 11y+
Python
FastAPI• 7y+
Flask• 7y+
Java
Spring Cloud
Spring Boot• 11y+
Spring MVC• 11y+
PHP
Laravel
PHPUnit• 11y+
C#
ASP.NET Core
Databases
Amazon Aurora
ElasticSearch
FAISS
Google BigQuery
pgvector
Pinecone
Weaviate
Apache Kafka• 11y+
MySQL• 11y+
PostgreSQL• 11y+
Redis• 11y+
AI/ML
AI Agents
AutoGen
AWS Bedrock
Computer Vision
CrewAI
Fine-tuning
Kubeflow
LangGraph
LlamaIndex
Model Context Protocol
NLP
OpenCV
Prompt Engineering
Semantic Kernel
Time Series Forecasting
Transformers
Vertex AI
YOLO
LangChain
NumPy• 11y+
Pandas• 11y+
Scikit-learn• 11y+
Airflow• 7y+
BERT• 7y+
MLFlow• 7y+
PyTorch• 7y+
Spark• 7y+
TensorFlow• 7y+
XGBoost• 7y+
RAG• 4y+
Frontend
Bootstrap
Tailwind CSS
PostCSS
JQuery• 11y+
React.js• 11y+
GraphQL• 7y+
Material UI• 7y+
Next.js• 7y+
Redux• 7y+
Mobile
Clean Architecture
Combine
Modularization
MVC
MVVM
SwiftUI
UIKit
XCTest
JUnit• 11y+
DevOps
Amazon EC2
Amazon EKS
AWS Lambda
Azure AKS
CI/CD
GCP
GitHub Actions
Google GKE
Grafana
OpenTelemetry
Prometheus
Terraform
AWS• 11y+
Docker• 11y+
Git• 11y+
Jenkins• 11y+
Azure• 7y+
Kubernetes• 7y+
Rest API• 7y+
Timeline
Senior Software Engineer (iOS)
•
Senior
Avant Technologies Inc
•
Full-Time
Led the design and delivery of SwiftUI-based iOS applications integrating AI features and cloud backends. Refactored a legacy UIKit codebase into modular SwiftUI architecture using MVVM and Clean Architecture, significantly improving complexity and delivery velocity. Built reusable design-system components, expanded automated testing (unit, snapshot, integration), and optimized performance with profiling. Owned CI/CD release automation using fastlane and scripting, reducing release cycle time and incidents.
RAG
Senior Full Stack Engineer
•
Senior
HCL Technologies
•
Full-Time
Delivered enterprise full-stack and cloud-native solutions combining modern web frontends, microservices backends, and data platforms. Implemented REST and GraphQL APIs and improved latency and performance for operational dashboards. Built distributed data processing with Spark, Kafka, and Airflow, and added ML capabilities using classic ML and deep learning to support recommendations and predictive analytics. Containerized services with Docker/Kubernetes and automated deployments with Jenkins and MLflow while improving deployment speed and availability.
React.js
Next.js
Redux
Material UI
Java
C#
Spring Boot
FastAPI
Flask
Ruby on Rails
GraphQL
Rest API
Spark
Apache Kafka
Airflow
Python
SQL
Pandas
NumPy
Scikit-learn
TensorFlow
PyTorch
BERT
XGBoost
Docker
Kubernetes
AWS
Azure
Jenkins
MLFlow
Software Engineer
•
Middle
Wix
•
Full-Time
Developed full-stack SaaS features and supported scalable data processing for large-scale user workloads. Worked across backend services and customer-facing web apps, building REST APIs and optimizing relational and NoSQL data models. Designed ETL and event-driven pipelines with Kafka and batch analytics workflows using Python, SQL, Pandas, and NumPy. Contributed to ML-driven personalization prototypes with scikit-learn and supported reliable releases using CI/CD tooling and automated tests.
PHP
Ruby on Railssince 2015
JavaScript
JQuery
React.jssince 2015
Javasince 2015
Spring MVC
Spring Bootsince 2015
MySQL
PostgreSQL
Redis
Apache Kafkasince 2015
Pythonsince 2015
SQLsince 2015
Pandassince 2015
NumPysince 2015
Scikit-learnsince 2015
Dockersince 2015
AWSsince 2015
Jenkinssince 2015
JUnit
Mockito
PHPUnit
RSpec
Git
Florida State University
Bachelor's Degree •
Computer Science