You will get Java Backend Development | Spring Boot · DDD · REST API · Microservices
Project details
You'll get a backend built the right way — not just working, but maintainable, testable, and ready to scale.
I'm Mateusz, founder of LokHit Studio. I specialize in Java, Spring Boot, Domain-Driven Design, and hexagonal architecture. I build systems that are easy to extend, safe to refactor, and documented so your next developer won't curse your name.
Whether you need a clean REST API, a modular monolith, or a full microservices setup — I bring structure, discipline, and real engineering thinking to every line of code.
Every delivery includes source code, documentation, and architecture that makes sense.
I'm Mateusz, founder of LokHit Studio. I specialize in Java, Spring Boot, Domain-Driven Design, and hexagonal architecture. I build systems that are easy to extend, safe to refactor, and documented so your next developer won't curse your name.
Whether you need a clean REST API, a modular monolith, or a full microservices setup — I bring structure, discipline, and real engineering thinking to every line of code.
Every delivery includes source code, documentation, and architecture that makes sense.
Programming Languages
Python, Java, ScalaCoding Expertise
Cross Browser & Device Compatibility, Performance Optimization, DesignWhat's included
| Service Tiers |
Starter
$300
|
Standard
$950
|
Advanced
$2,000
|
|---|---|---|---|
| Delivery Time | 7 days | 14 days | 30 days |
Number of Revisions | 2 | 3 | 5 |
Design Customization | |||
Content Upload | |||
Responsive Design | |||
Source Code |
Optional add-ons
You can add these on the next page.
Fast Delivery
+$50 - $500
Additional Revision
+$15About Mateusz
Senior Java Backend Developer | Spring Boot - Microservices - Kafka
Krakow, Poland - 7:04 am local time
My core stack is Java (Spring Boot, 8–17), Python (FastAPI), Scala, Kafka, PostgreSQL, and Docker. I've shipped production systems for NBB Bank, Eviden/Atos Group, and Mavoco — ranging from financial CRM platforms to IoT data pipelines. I understand what it means to build for compliance, auditability, and long-term maintainability, not just for a demo.
Right now I'm building Synaptix — an industrial IoT platform combining real-time machine telemetry (Apache Kafka), predictive maintenance (RUL algorithms), and intelligent document processing (OCR + NLP) in a microservices architecture. Synaptix was selected for Stage II of the ORLEN Skylight Accelerator — one of 40 projects chosen from over 900 applicants.
Beyond pure backend, I work across the full stack when needed: Next.js + TypeScript on the frontend, data lakehouse architecture for streaming analytics in the financial sector, and AI/LLM integration for domain-specific applications. I also hold a degree in zootechnics with hands-on veterinary practice experience — useful when building medical or diagnostic systems where domain knowledge matters as much as the code.
I work with DDD-based architecture, proper test coverage, clear documentation, and regular client updates. Available for both fixed-price projects and hourly contracts.
If you're building something that needs to scale, handle real data, or integrate AI into a serious production environment — let's talk.
Steps for completing your project
After purchasing the project, send requirements so Mateusz can start the project.
Delivery time starts when Mateusz receives requirements from you.
Mateusz works on your project following the steps below.
Revisions may occur after the delivery date.
Signing agreement
Prepare solution (documentation)
You will get sample documentation. After accepting it the full docs will be prepared.