Software Engineering · Cloud Architecture · AI Products
NextLevel Software Solutions for
Modern Businesses
Over a decade of experience in software development, we specialize in creating custom solutions across web, mobile, and cloud platforms while providing strategic direction and technical leadership.
AIuris
An AI-powered legal assistant built for Croatian lawyers and judges. We designed and developed it from the ground up - the AI agent, the mobile app, the backend, and the legal knowledge retrieval engine.
AI Legal Consultation
Intelligent assistant for legal question answering, document drafting, and strategy - grounded in retrieved evidence from Croatian law.
1,000,000+ Judicial Decisions
The largest legal database of judicial practice and over 3 million e-Oglasna notices, searchable and integrated into the AI context.
e-Građani Integration
Sync with Croatia's e-Komunikacija system for automated deadline tracking, calendar sync, and case management.
About Us
Engineering teams trust us with their hardest problems.
NextLevel Dev is a software engineering company based in Zagreb, Croatia. We specialize in enterprise-grade systems, cloud infrastructure, and AI-powered applications - from national government platforms serving millions of citizens to specialized legal tech products.
Our work spans .NET, React, Node.js, and cloud platforms on AWS and Azure. We follow DDD, SOLID, and microservices patterns not because they're trendy, but because they're the right tool for the complexity we deal with.
We're also built things purely for fun - our game portfolio includes 20+ published titles with 5M+ players and a 4.9 average rating.
What We Do
Services
We focus on four areas where we consistently deliver the most value - each backed by real project outcomes.
Full-Stack Development
End-to-end web and mobile applications built with .NET, React, Next.js, React Native, and Node.js. REST, GraphQL, and gRPC APIs designed for scale.
- Enterprise web applications
- Cross-platform mobile apps
- API design & microservices
Cloud & Infrastructure
Cloud-native architecture on AWS and Azure. Infrastructure as Code with Terraform and CDK. CI/CD pipelines, containerization, and observability.
- AWS & Azure architecture
- Docker & Kubernetes
- CI/CD & DevOps automation
AI & Intelligent Systems
Custom AI agents and RAG pipelines using LangChain and LangGraph. From prototype to production - designed for accuracy, traceability, and cost-efficiency.
- LangChain & LangGraph agents
- RAG pipeline engineering
- AI-powered product development
Technical Leadership
Architecture consulting, team mentoring, and strategic technology decisions. We help engineering teams ship faster without sacrificing quality.
- Architecture review & planning
- Team mentoring & best practices
- Technology stack assessment
Portfolio
Selected Work
Enterprise engagements where we led architecture, development, and delivery.
More Projects
Built In-House
Side projects and products we built for ourselves - from viral browser games to multiplayer shooters.
