Hi, I'm

Senior
Full Stack
Engineer

I build reliable, scalable enterprise software for telecom, railway and SaaS — specialised in Java/Spring Boot backends, Vue.js frontends and cloud infrastructure across AWS, GCP and Azure.

View My Work Let's Talk ✉
Professional & Reliable
Fast & Efficient
Clean & Maintainable Code
Ivan Landeka - Senior Full Stack Engineer
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Available for new projects

Booking & Ticketing Systems

End-to-end booking platforms with conflict prevention, multi-tenant architecture and real-time scheduling across locations.

Process Automation & Integrations

Automate workflows and integrate third-party APIs — from payment gateways to international railway ticketing protocols.

SaaS & Web Applications

Scalable, secure multi-tenant SaaS platforms built with modern technologies and deployed on cloud infrastructure.

Maintenance & Support

Ongoing support, performance optimisation and feature development to keep your software running smoothly.

Featured Projects

Recent Work

E-Commerce Platform

E-Commerce Platform

Web Application

Full e-commerce platform with Stripe payments, product/cart/checkout/fulfilment — sole developer, delivered end-to-end in ~4 months on a 9-service AWS stack.

Spring Boot Vue.js AWS Stripe
Appointment Booking SaaS

Appointment Booking SaaS

Web Application

Multi-tenant booking platform with 3 role types, multiple store locations, conflict-prevention logic and complete booking lifecycle on GCP.

Spring Boot Vue.js GCP Docker
Tournament Registration Platform

Tournament Registration Platform

Web Application

Full-stack tournament registration system with complete architecture, development and cloud deployment on Azure — built solo from scratch.

Spring Boot Java MySQL Azure
Career Path

Experience

Founder & Full Stack Engineer

Mar 2026 – Present

NextLine · Zagreb, Croatia

  • Founded NextLine, an EU-registered software consultancy; handling client acquisition, architecture, development and delivery for DACH, UK and US markets.
  • Trilingual client delivery (German, English, Croatian) with zero visa/legal friction as an EU-based contractor.

Full Stack Engineer

Apr 2024 – Feb 2026

Freelance · Zagreb, Croatia

  • Built Appointment Booking SaaS — multi-tenant platform with 3 role types, conflict-prevention logic, GCP stack.
  • Delivered E-Commerce Platform end-to-end in ~4 months — Stripe integration, 9-service AWS stack.
  • Managed full client relationships — requirements, delivery, infrastructure and handover.
JavaSpring BootVue.jsAWSGCP

Full Stack Engineer

Apr 2023 – Mar 2024

SUPRA Informatika · Zagreb, Croatia

  • Integrated into the SEPA international railway ticketing network (800M-person European market reach).
  • Sole engineer on two production platforms — bus, train and flight search, booking and live ticketing.
C#/.NETMSSQLVue.jsREST APIs

Full Stack Engineer

Jan 2022 – Mar 2023

Freelance · Zagreb, Croatia

  • Designed and built a full-stack tournament-registration platform solo — full architecture, development and cloud deployment.
JavaSpring BootMySQLAzure

Software Engineer

Nov 2019 – Dec 2021

CompaxDigital · Vienna, Austria

  • Deutsche Telekom Magenta — one of Europe's largest BSS/OSS platforms serving millions of subscribers.
  • Built microservices and workflow engine items automating contract creation, SIM provisioning and device purchasing.
  • Congstar (DT subsidiary) — resolved critical DB connection leaks improving platform stability.
Spring BootJavaOracle SQLJenkinsMongoDB

About Me

Senior Full Stack Engineer with 6+ years delivering enterprise software for Deutsche Telekom and major railway operators. Sole developer on 4 end-to-end production systems. EU-based boutique software engineering consultancy, available for B2B contracts.

Get In Touch

Tech Stack

Java
Spring Boot
C# / .NET
Vue.js
Vue.js
TypeScript
PostgreSQL
MySQL
Docker
Jenkins
Jenkins
AWS
GCP
Git

Let's Work Together

Have a project idea or need help with your software? Let's build something great together.

landekaivan@gmail.com
+385 91 556 6492
Zagreb, Croatia · Remote
Get In Touch
Contact

Let's Build Something
Great Together

Whether you need a booking system, a SaaS platform, or process automation — I'm here to help. Available for B2B contracts in DACH, UK and US.

Email

landekaivan@gmail.com

Phone

+385 91 556 6492

Location

Zagreb, Croatia · EU-Based · Remote

Languages

German · English · Croatian