Contact information

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Work experience

Senior Full Stack Developer

from 06.2020 to 12.2025 (5 years 7 months)
Vearon, Remote (IT)

- Led the design and implementation of cloud-native backend platforms
using Kotlin (Spring Boot, GraphQL) and Java, supporting high-throughput
APIs and distributed workflows.
- Built and operated microservices across multiple stacks, including Node.js
(NestJS) and Go, selecting languages based on performance,
concurrency, and scalability requirements.
- Designed backend services integrating Python (FastAPI) for AI/LLM
pipelines and Elixir-based services for concurrency-heavy, event-driven
workloads.
- Integrated Rust components for performance-critical processing paths
where memory safety and execution efficiency were required.
- Developed and maintained frontend applications using React, Next.js, and
Angular for internal tools and customer-facing dashboards.
- Designed and optimized data layers using PostgreSQL, MongoDB, Redis,
and vector databases for real-time and analytical workloads.
- Deployed and operated systems on AWS using Docker, Kubernetes, and
automated CI/CD pipelines.
- Owned architectural decisions, cross-service integrations, and production
reliability across multiple environments.

Full stack developer

from 10.2016 to 05.2020 (3 years 8 months)
Techverx, Remote (IT)

- Led backend development formultiple client platforms using Node.js
(NestJS, Express), Java (Spring Boot), and C# / ASP.NET Core.
- Built modular APIs and backend services using PHP (Laravel) and Ruby on
Rails for marketplaces, e-learning systems, and payment-enabled
applications.
- Designed authentication, billing, and notification systems integrating
third-party services such as Stripe, Firebase, and Twilio.
- Implemented backend services using Clojure for data-centric processing
and API layers within JVM-based systems.
- Collaborated with frontend teams using React and Vue.js, defining API
contracts and supporting real-time features.
- Optimized PostgreSQL and MongoDB queries to improve performance
and scalability.
- Mentored junior engineers and enforced backend architecture and code
quality standards.

Full stack developer

from 05.2014 to 09.2016 (2 years 5 months)
Varyence, Other countries (IT)

- Developed enterprise-grade frontend applications using Vue.js, React,
and TypeScript, delivering dashboards, CRM systems, and client portals.
- Built frontend modules using Angular for internal business tools and
administrative interfaces.
- Integrated frontend applications with backend services built in Spring
Boot, ASP.NET, and Laravel.
- Collaborated closely with backend engineers to refine API designs and
improve frontend-backend data flows.
- Improved UI performance, cross-browser compatibility, and UX
consistency across platforms.

Backend developer

from 06.2013 to 04.2014 (11 months)
Umanova, Other countries (IT)

- Developed backend services and REST APIs using Python (Django, Flask)
and C# / .NET.
- Implemented backend logic in C++ for performance-sensitive processing
components.
- Worked with relational databases and contributed to API integrations with
frontend and mobile teams.
- Built a strong foundation in backend architecture, debugging, and
production support.

Education

University of Split

Computer Science, Other countries
Higher, from 2009 to 2012 (3 years)

Additional education and certificates

No additional education or certificates.

Knowledge and skills

• Java
• JavaScript
• TypeScript
• Python
• Kotlin
• Spring boot
• GraphQL
• REST API
• Node.js
• NestJS
• Express.js
• FastAPI
• Django
• Flask
• Golang
• PHP
• Laravel
• C#
• ASP.NET Core
• Ruby on Rails
• React
• Next.js
• Angular
• Vue.js
• Tailwind CSS
• AWS
• Lambda
• Amazon S3
• API development
• Docker
• Kubernetes
• GitHub Actions
• Jenkins
• PostgreSQL
• MySQL
• NoSQL
• MongoDB
• Redis
• Microservices
• Distributed File System
• JSON Web Token
• Llm agents
• LangChain
• Rag
• OpenAI
• Pinecone
• SQL
• Figma
• SASS
• Git

Language proficiencies

• English — advanced
• Croatian — fluent

Additional information

Telegram: @marinnvk91
WhatsApp: [open contact info](look above in the "contact info" section)