Personal details

Nik N. - Remote full-stack developer

Nik N.

Senior Java/Spring Contract Developer | Full Stack
Based in: 🇧🇬 Bulgaria
Timezone: Sofia (UTC+3)

About

Business Technology Consultant | Full-Stack Developer

I specialise in Java and Spring backends, REST APIs, PostgreSQL, systems integration and TypeScript front ends with React, Angular or Vue. I am best suited to focused contract work involving business applications, product increments, workflow automation, migrations, automated testing, legacy modernisation and technical recovery.

I can support discovery and requirements, solution design, implementation, deployment, production diagnostics and handover. My experience also includes distributed services, cloud infrastructure, observability, MQTT/IoT and GPS systems, and geospatial applications.

I previously tutored students and independent learners in programming and technical subjects, which continues to shape how I explain decisions and mentor developers.

Based in Bulgaria / Sevlievo. Available for client-site work in Sofia, hybrid engagements and remote European delivery.

Portfolio: https://greenwallbusiness.com/nik/

Work Experience

Full Stack Software Developer
Greenwall Business Systems | Jan 2024 - Present
Java
Spring Security
TypeScript
Spring Boot
Test Automation
API Integration
RESTful API

I focus on crafting advanced IT solutions, leveraging my expertise in software development.

Java Backend Developer
PLAN A | Aug 2024 - Jan 2025
Java

Employed by PLAN A and assigned under an outsourcing agreement to SAP Ariba’s France-based team. Worked on legacy Java services as part of a distributed international delivery team.

Projects

Kontakt-VN Business Operations Platform
2026 | https://backoffice.bg-spices.com/catalog?lang=en&measureKind=kilogram&pageSize=12
Java
PostgreSQL
OAuth 2.0
TypeScript
WooCommerce
Docker
React
Spring Boot
Deployment automation
Test Automation
API Integration
RESTful API
Production B2B catalogue and back-office platform for a Bulgarian importer, processor and wholesaler. The system integrates sales, supply, inventory, documents, catalogue, ordering, transport, GPS and expense workflows with existing data sources, APIs, reporting and AI-assisted features. I owned business-process mapping, architecture, Java/Spring Boot backend development, React/TypeScript frontend development, PostgreSQL data modelling, Docker deployment support and coordination with the business owner and external providers.

Education

Technical University of Sofia
Coursework — programme not completed・Electrical Power Engineering and Electrical Equipment
Sep 2013 - Apr 2014
Technical University Gabrovo
Coursework — programme not completed・Electrical Power Engineering and Electrical Equipment
Sep 2010 - Dec 2012