Software Engineer and Solution Architect with 12+ years of experience in full-stack development, cloud architecture, AI engineering, and DevOps. Expert in .NET, React, React Native, and cloud platforms (Azure, AWS). Currently building AI-native engineering platforms and leading development of AI-powered legal tech, compliance, and trust infrastructure products. Proven track record of leading enterprise software projects, implementing microservices architectures, and delivering scalable solutions across LegalTech, InsurTech, GovTech, and eCommerce. Strong background in RAG pipelines, LLM integration, prompt engineering, and AI agent development using LangChain, LangGraph, and vector databases. Extensive experience in game development with 5M+ players across 20+ published titles. Skilled in Agile methodologies, CI/CD implementation, and cloud infrastructure management. By combining my academic background in model-driven architectures and domain-driven methodologies with an entrepreneurial mindset, I offer deep expertise in product development and understanding of existing solutions in relation to the current technological landscape.
Karlo Benčić
Software Architect & AI Engineer
Skills
Programming Languages
- C#
- .NET
- JavaScript
- TypeScript
- Java
- Unity
- PHP
- Go
- Python
Web Development
- ASP.NET Core
- React
- Next.js
- Node.js
- Bun
- REST API
- GraphQL
- Angular
- Nest.js
- Tailwind
- TanStack Query
- Web3.js
- Laravel
Cloud & DevOps
- Azure
- AWS
- Vercel
- Docker
- Kubernetes
- CI/CD
- Terraform
- AWS CDK
- SST
- GitHub Actions
- Azure DevOps
- GCP
Database Technologies
- SQL
- NoSQL
- MSSQL
- PostgreSQL
- Supabase
- MongoDB
- Redis
- AWS RDS
- DynamoDB
- PGVector
Mobile Development
- React Native
- Expo
- Android
- iOS
- Firebase
- Google API
- NativeWind
Software Architecture
- Microservices
- DDD
- SOLID
- Design Patterns
- Enterprise Architecture
- Cloud Architecture
- CQRS
- Event-Driven
AI & Machine Learning
- LangChain
- LangGraph
- RAG Pipelines
- Vector Databases
- PGVector
- Prompt Engineering
- Context Engineering
- AI SDK
- Flowise AI
- MCP
- LLM Integration
Security & Trust
- C2PA
- PKI
- HMAC
- JWT
- OAuth
- Keycloak
- eIDAS
- RFC3161
Work Experience (9)
- Azure
- AWS
- Vercel
- Microservices
- Software Architecture
- Solution Architecture
- Mobile
- DevOps
- AI
- .NET Core
- Angular
- React
- React Native
- Next.js
- Unity
- Flowise AI
- LangChain
- Docker
- Kubernetes
- Terraform
Leading strategic software development projects across web, mobile, and cloud platforms while providing technical leadership and consulting services. Specializing in enterprise-grade solutions using .NET ecosystem, modern web technologies, and cloud platforms. Focus on microservices architecture, AI integration, and following industry best practices while promoting a culture of continuous learning and innovation.
Delivering end-to-end software solutions for clients across Belgium, Netherlands, Germany, United Kingdom, United States of America and Croatia - from architecture and development to deployment and maintenance
Building AI-powered products integrating LLMs, RAG pipelines, vector databases, and custom MCP servers using LangChain, LangGraph, and AI SDK
Architecting microservices systems with .NET Core, React, and Next.js deployed on Azure, AWS, and Vercel
Developing cross-platform mobile applications with React Native and Expo, including government and court system integrations
Providing technical leadership, code reviews, and mentorship across multiple concurrent projects
- Azure
- LangChain
- LangGraph
- RAG
- Vector Databases
- Docker
- Kubernetes
- GitHub Actions
- Azure DevOps
- Python
- TypeScript
- Microservices
Senior AI Engineer on PwC's AI-native engineering initiative. Building cloud-native microservices and platforms that embed AI into every phase of the Software Delivery Lifecycle - from planning and design through coding, testing, and deployment.
Built the SDLC Launch accelerator: a unified AI-native console for orchestrating the software development lifecycle
Embedded AI into every phase of the Software Delivery Lifecycle
Automated and orchestrated software development workflows
- Next.js
- React
- TypeScript
- Supabase
- Tailwind
- TanStack Query
- AI SDK
- MCP
- LangChain
- AWS
Founding engineer on CleverQM, an EHS (Environment, Health & Safety) and quality management AI SaaS platform for the German market. Driving AI-powered risk assessment, hazardous substance management, and employee instruction modules with German-language compliance workflows.
Architected risk assessment wizard with AI-powered hazard identification
Built hazardous substance management module with AI-driven Safety Data Sheet extraction and version tracking
Implemented LMS employee instruction module with compliance tracking for mandatory safety training
Developed custom MCP servers for AI context retrieval and prompt engineering with structured German-language outputs
- AWS
- Next.js
- React
- React Native
- TypeScript
- Node.js
- Kotlin
- AWS CDK
- SST
- DynamoDB
- Lambda
- DevOps
- GitHub Actions
- C2PA
- iOS
- Android
Founding full-stack engineer delivering TrustNXT's first C2PA-based trust infrastructure for authenticating digital media. Bootstrapped AWS serverless foundations from scratch and shipped Web/Android/iOS SDKs, a React Native whitelabel app, and multi-tenant backends that enable secure capture, certificate issuance, timestamping, and verification used in insurer pilots.
Designed and operated Trust SDK APIs: Protect (ephemeral client certificates via ACM PCA), Inspect (label verification), and RFC3161 TSA
Implemented security layer with nonce-based HMAC request signing, CSR validation, JWT auth, and signer allow-listing
Built a multi-tenant whitelabel backend with token lifecycle, secure photo ingestion, inspection pipeline, and React SSR deep-link landing
Deployed full AWS serverless infrastructure with Lambda, DynamoDB, S3, CloudFront, SQS, and SNS
Developed TypeScript Web SDK and Kotlin Android SDK with documented flows (Fumadocs); collaborated on iOS SDK without owning the iOS app
Set up developer experience and observability: CloudWatch dashboards/alarms, Slack ChatOps, Swagger UI, LocalStack
Contributed to open-source c2pa-ts (TypeScript C2PA implementation by TrustNXT), aligning product with industry standards
- AWS
- PHP
- Laravel
- Vue.js
- Docker
- Microservices
- Kubernetes
- Terraform
- Redis
- AWS CDK
- DevOps
- Git
- LangChain
- Flowise AI
- Airbyte
- Github Actions
As a solution architect and a DevOps engineer, I led migration from monolith to cloud-based microservices architecture on AWS, implementing DevOps practices and AI-powered solutions to drive performance, reliability, and scalability while ensuring cost-effectiveness.
Led migration of monolith system to cloud-based microservices on AWS, with a strategic roadmap ensuring zero disruption to operations
Architected CI/CD pipelines with GitHub Actions and infrastructure as code, implementing zero-downtime deployments
Built AI-powered solutions with Flowise AI and LangChain, including pipeline analytics and cost tracking with Langsmith
Deployed Airbyte for data ingestion and transformation pipelines
Established code quality, security, and scalability best practices while mentoring the development team
- .NET
- Azure
- Microservices
- Docker
- Kubernetes
- Kafka
- Next.js
- CQRS
- DataDog
- Contentful
- Commercetools
- React Relay
- GraphQL
- VictoriaMetrics
- Grafana
- HotChocolate
Principal Software Engineer with deep technical expertise in designing and delivering high-performance, scalable systems. As a tech lead, I drove the development of D2C services on a global multi-tenant eCommerce platform, architected a reporting solution for Croatian Railways, and implemented advanced DevOps practices on a greenfield EPR project.
Tech lead for D2C services on a global multi-tenant eCommerce platform at Fontem Ventures, operating in 20+ countries with Commercetools, Contentful, and GraphQL
Optimized platform performance through microservices tuning and caching strategies, achieving 99.9% availability
Mentored multiple developers, reducing technical debt and improving code quality through centralized configuration management
Architected a reporting application for Croatian Railways using .NET and React
Implemented DevOps practices on a greenfield EPR project as a subcontractor for GS1
- .NET Framework
- .NET Core
- Entity Framework
- MSSQL
- PostgreSQL
- MongoDB
- gRPC
- RabbitMQ
- Web Services
- React
- Firebase
- Google API
- GTFS
- Keycloak
- IAM
- LDAP
- Redis
- Razor
- Blazor
- React Native
Senior Software Engineer and technical leader with deep expertise in full-stack and mobile development. I led the implementation of public transport eTicketing and electronic toll collection systems, also acting as a lead mobile developer in the company.
Software architect and lead mobile developer on public transport eTicketing in Split and electronic toll collection (ENC) on Croatian highways
Built web solutions with .NET and React, and mobile applications with React Native integrated with Google API, Firebase, and GTFS for real-time trip planning
Engineered integrations with payment providers, real-time vehicle data from on-board units, and fleet management platforms
Implemented authentication frameworks using Keycloak and LDAP, with system performance optimization using MongoDB, Redis, gRPC, and RabbitMQ
Mentored team members and served as lecturer for university students at the internal academy
- Java
- Spring
- Hibernate
- Oracle
- React
- Gradle
Full Stack developer at project for government digital services
Developed government digital services for 'Jedinstveno Upravno Mjesto' led by FINA as part of the e-Građani (e-Citizens) platform
Unified citizen forms and requests into a single application serving millions of users
Integrated NIAS (eIDAS) for identity verification using ID cards, digital certificates, and cryptographic methods
Integrated payment processing with CorvusPay
- Unity
- C#
- WebGL
- Android
- iOS
- PC
- Three.js
- PHP
- Go
- Nest.js
Cross-platform game development implementing own ideas and solutions
Founded and managed a dedicated development team for game development
Developed and published over 20 web, mobile and PC games with over 5 million players in total
Published games on Google Play and the App Store with optimized performance, reduced build sizes, and quality cross-platform experiences
Integrated essential game components such as in-app purchases, ads, leaderboards, achievements, and social gaming services (Apple Game Center, Google Play Games Services), alongside robust analytics and monetization strategies
Oversaw complete game development cycles, from initial concept and technical design to deployment and maintenance, incorporating advanced techniques like reverse engineering and code obfuscation
Projects (8)
- React Native
- Expo
- .NET
- PGVector
- AI SDK
- LangGraph
- MCP
- TypeScript
Intelligent legal assistant app for lawyers and judges featuring AI-powered legal consultation, extensive legal databases with 1.000.000+ judicial decisions, and integration with Croatia's e-Komunikacija court system.
Built AI-powered legal assistant with intelligent document drafting and legal consultation using RAG pipelines and vector databases
Integrated with e-Komunikacija court system for real-time case synchronization and automated deadline tracking
Digitalized 1M+ judicial practice documents and 3M+ court notices from e-Oglasna archive
Developed cross-platform mobile app (iOS, Android) with biometric authentication and device integrity checks
Built .NET backend with Marten/WolverineFx and custom MCP server for legal knowledge retrieval
- .NET Core
- Angular
- RabbitMQ
- Docker
- Keycloak
- Hangfire
- Microservices
Modernization of a monolithic back-office system into a scalable microservices architecture for managing cleaning services, client communication, and complex scheduling with 24/7 availability.
Implemented scalable microservices architecture with message queuing via RabbitMQ
Integrated Keycloak for secure authentication and Hangfire for background processing
Achieved 24/7 system availability with containerized deployment and automated CI/CD
- Next.js
- PostgreSQL
- Docker
Integrated platform for membership processes, event management, and administrative operations for the Croatian Chemical Society (Hrvatsko Kemijsko Društvo).
Built centralized member database with automated membership applications and renewals
Implemented admin dashboard with data management and automated email workflows
- .NET Core
- React
- Clean Architecture
- DDD
Scalable back-office system for a social support project at Peoples Place Community Partnerships based in United Kingdom, applying Clean Architecture and Domain-Driven Design principles.
Designed and implemented a scalable back-office system following Clean Architecture and DDD principles
Built case management workflows for community support services
- Unity
- WebGL
- Multiplayer
- FPS
- PlayFab
A revival project of the old Paradise Paintball 3D browser game which later evolved to UberStrike. This game allows you to play against other players within your web browser without any installations.
Developed a browser-based multiplayer FPS game using Unity and WebGL, featuring classic FPS gameplay set in various battle environments
Designed dozens of weapons, armor, and gear items for players to unlock and upgrade, with Deathmatch and Team Deathmatch game modes available
Integrated PlayFab for game services and deployed the game on Azure cloud infrastructure
- Unity
- WebGL
- Android
- iOS
- PC
- Next.js
- Tailwind
- MongoDB
A collection of games based on montage parodies and memes published on multiple platforms with a total of over 5 million players. Some of the best rated games ever on the Google Play and App Store with a rating of 4.9/5.0
MLG Flappy Bird 420
Angry Dews
Slav Tiles
- Smart contracts
- Hyperledger Fabric
- Hyperledger Explorer
- Docker
- NodeJS
- React
- gRPC
- Kafka
- CouchDB
- Golang
Distributed Land Registry solution for Croatia using blockchain technology. Users have read-only access to the blockchain data, but land owner nodes have write access for managing their own land registry data using a smart contract written in chaincode with TypeScript and Go. Nodes in the network are connected to a Kafka cluster for message queuing and a CouchDB cluster for storing the blockchain data.
Developed an academic project for the university involving a web application for managing land registry data and a distributed blockchain-based database for land
Implemented the solution on a permissioned Hyperledger Fabric network, with Hyperledger Explorer for monitoring, using Node.js, React, and Express API for the web application
Modeled land as a digital asset on the blockchain with unique ID, owner, area, location, and other data
- Ethereum
- Solidity
- Truffle
- Chainlink
- Web3.js
- NodeJS
- React
- Docker
This project implements the possible solution to 'oracle problem', which is one of the biggest problems facing DLT systems based on smart contracts. Since the concept of reliability in DLT systems is not adequately solved by cryptographic security, we arrive at the concept of data truthfulness as a new property needed to characterize reliable, decentralized systems. A decentralized oracle makes DLT useful by allowing the entry of non-confidential data into the system in a decentralized manner, without relying on a central entity, which eliminates a single point of failure.
Developed an academic project as part of my master's thesis, involving a smart contract for requesting cryptocurrency market prices and a web application for managing the oracle
Implemented a smart contract in Solidity, utilizing Chainlink for external API requests, and created the web application using Node.js, React, and Web3.js for smart contract communication
Utilized Linkpool for managing oracle nodes and used LINK tokens for compensating oracle nodes for their work
Education (2)
- Object-oriented design
- Service-oriented computing
- Distributed systems
- Internet security
- Blockchain
- DLT
Thesis: Entry of Data from Trustless External Sources into Systems based on Distributed Ledger Technology, blockchain technology (Ethereum, Hyperledger Fabric and Chainlink)
- Object-oriented programming
- Algorithms and data structures
- Java Programming Language
- Application development using C#
Thesis: Security system for supporting sharing of user programs in educational system SynchEduca (Java, Spring, NodeJS)