SQL Server performance tuning, advanced SQL knowledge, data modeling. Deep knowledge of SQL database design and performance tuning, building ETL pipelines and finding trends in data sets and developing algorithms to help make raw data more useful to the enterprise.
Python
C#
SQL
Transact-SQL
Microsoft Access
Machine Learning
Odoo
Microsoft SQL Server Programming
Enterprise Resource Planning
PostgreSQL Programming
Performance Optimization
React
Data Integration
Luka M.
Varazdin, Croatia
$120/hr
5.0
18 jobs
I’m Luka Minđek, an AI engineer and full-stack developer from Varaždin, Croatia. I enjoy building complete, end-to-end solutions that combine solid engineering with practical applications of machine learning and modern AI.
I run MindX, my own software and AI development business, where I work on tailored projects that help clients bring intelligent features into their products. I also take part in local tech events and meetups, sharing what I’ve learned and staying connected with the growing AI community in Croatia.
Curiosity drives most of what I do, i like exploring new technologies, experimenting, and turning good ideas into real, working products.
JavaScript
Python
Python Script
Back-End Development
HTML
Web Design Plugin
CSS
Front-End Development
MySQL
Bootstrap
SQLite
Zeljko K.
Varazdin Breg, Croatia
$40/hr
5.0
33 jobs
✅ Blockchain development
✅ Solidity
✅ Rust
✅ Smart contracts
✅ Solana
✅ Ethereum
✅ Web3
✅ NFT
✅ Crypto
✅ ERC-20
✅ ERC-721
✅ SPL
✅ React.js
✅ Backend development
✅ API integrations
✅ Web development
✅ PHP
✅ Plugin development
✅ Payment Gateway Integrations
✅ API development
✅ Web applications
✅ Javascript
✅ Mysql
✅ Linux
As a Senior Developer with over 20 years of experience and a Master of Information Technology, I bring a wealth of knowledge and passion to every project. My commitment to writing clean, efficient code and doing things the right way ensures top-quality results.
I am fully dedicated to each project, striving for 100% customer satisfaction. My self-organization, quick learning, and motivation drive me to seek out and conquer new challenges.
Let’s connect and discuss how we can make your next project a success!
#blockchain #solidity #crypto #smartcontracts #backend #linux
Blockchain
Blockchain Development
Ethereum
Solidity
Smart Contract
Smart Contract Development
JavaScript
Python
Crypto Wallet
Laravel
API
API Integration
Web Application
Payment Gateway Integration
API Development
Zeljko Z.
Podgajci Podravski, Croatia
$45/hr
5.0
8 jobs
Hello, I've been working as a senior iOS developer and a team leader for over 12 years,
I'm currently a full time freelancer and a cofounder of an agency called Applab.hr specialized in native iOS development.
Services:
• iPhone, iPad, Apple TV and Apple Watch development
• code review and client consultations
Development:
• Xcode (Swift, Objective‐C)
Skills:
• git, SVN, CVS
• REST JSON, SOAP, XML RPC
• Region monitoring, location services
• Background processes, data tasks
• CoreBluetooth
• Websockets
• Power consumption optimisation
• OpenCV video processing
C#
iOS Development
SQL
Git
iPad App Development
Apache Subversion
Pavlo Z.
Zagreb, Croatia
$35/hr
5.0
7 jobs
Greetings 👋 I’m a Senior Full Stack Java Spring Boot Developer and a Certified AWS DevOps Engineer with more than 10 years of professional experience in end-to-end fullstack development.
My background includes Java based backend systems using Spring Boot, Spring MVC, and Spring Cloud, and in building modern fullstack apps with React. My work spans across healthcare, insurance, and automation platforms.
📌 What I Provide 💼
🔹 Complete development lifecycle: planning, coding, testing, deployment, and maintenance
🔹 AWS and Java certified expertise
🔹 Implementation of DevOps practices and CI/CD pipelines
🔹 Cloud cost-efficiency strategies
🔹 Application performance enhancement
🔹 Rapid MVP development to bring your concept to life
📌 Why Collaborate with Me 🤝
🔹 10+ years of hands-on experience in Java and DevOps engineering
🔹 Specialized knowledge in domains like Healthcare and AdTech
🔹 Strong commitment to high code quality and reliability
Fullstack / Frontend Capabilities ⚛️
As a Full Stack Java Spring developer, I build engaging and scalable applications by integrating modern frontends - React.js, Next.js, and Vue.js - with robust Spring Boot and Java-based backends. I follow fullstack best practices and deliver clean UI using HTML, CSS, and Tailwind CSS.
Back End Expertise ⚙️
Working with Java since version 6 through 21, I utilize frameworks such as Spring Boot, Spring MVC, Spring Cloud, Spring Batch and Spring Security to build scalable services.
DevOps & AWS Experience ☁️
With 8+ years in AWS environments and certifications in both DevOps Architecture and Development, I specialize in serverless and containerized solutions using AWS Lambda, Docker, Kubernetes, RDS, and Landing Zone - ensuring scalability and zero-downtime deployments.
Database Skills 💾
I’m proficient in relational databases like PostgreSQL, MySQL, and SQL Server. Also skilled with NoSQL systems including Redis, MongoDB (DocumentDB), Aerospike, DynamoDB, and OpenSearch (ElasticSearch). For analytics, I work with Amazon Redshift.
API Integration 🌐
Skilled in REST, SOAP, Swagger, and OpenAPI 3 for seamless service integration.
Performance Tuning 🚀
Utilizing tools like JMeter, Gatling, AWS X-Ray, and JProfiler to optimize speed and resource usage.
Messaging Systems ✉️
Experienced in asynchronous communication with Apache Kafka, Amazon SQS/SNS, and RabbitMQ.
Desktop GUI Development 🖥️
Developing sleek and functional desktop interfaces with JavaFX and FXML.
Let’s connect and talk about your goals! 🚀
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