Karlo Benčić

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

Architected the autonomous delivery system that takes a Jira ticket to a reviewed, merge-ready pull request using specialized agents for planning, coding, testing and review on OpenAI Codex, Claude Code or Cursor

Designed self-healing agent workflows with failure classification, recovery routing, automatic task splitting, and cross-run project memory

Designed the enterprise governance model with human-in-the-loop escalation/approvals, audit trails, and cryptographic chain of custody for agent actions (Sigstore, in-toto)

Introduced autonomous code review across the organization, deploying multi-agent reviewers for logic, standards and security gating merges in git repositories

Built LangChain and LangGraph agents, RAG pipelines and MCP servers delivering enterprise context from Jira, GitHub, SharePoint, SonarQube and engineering knowledge base

Architected a platform unifying an internal AI ops workbench, a multi-tenant LMS, a public marketing/checkout platform with Stripe, and a standalone MCP server

Built autonomous agents on durable Vercel Workflows with human-in-the-loop pause/resume hooks and Supabase Realtime state sync for Safety Data Sheet (SDS) extraction and medical device intake

Engineered a medical device risk classification and reprocessing module that evaluates manufacturer IFUs against location-specific equipment to generate reprocessing procedures, backed by headless Chromium + SingleFile archival of cited web/PDF sources

Designed a context-engineered risk assessment wizard and bulk generation pipeline producing workplace hazards and STOP protective measures, routed through Vercel AI Gateway with multi-provider fallbacks, Zero Data Retention (ZDR), and local LLM support

Implemented cross-lingual semantic deduplication using PGVector (OpenAI embeddings + canonicalization) alongside deterministic concentration and manufacturer compatibility rules across the substance and device registries

Built a GPU-accelerated FastAPI microservice wrapping Whisper (with OpenAI fallback) and Microsoft Presidio + Flair NER for medical PII redaction, plus client-side FFmpeg WASM audio chunking for automated 5-language LMS quiz generation

Designed a custom passwordless LMS authentication system, cascading PDF certificate workflows, and encrypted WhatsApp Business Flows

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 integration and xcframework release packaging

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

Built AI deep research and context engineering workflows, integrating NVIDIA edge verification, AWS Transcribe, and license plate recognition (LPR) for automated inspection audits

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 Langflow 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

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

Architected SOA microservice platforms for HAC ENC and Promet Split eTicketing with 20+ bounded-context services with RabbitMQ/MassTransit ESB, REST APIs, database-per-service, and Keycloak IAM

Designed containerized ENC deployment: Docker Compose local stack (25+ service images), OKD/OpenShift production manifests, and Jenkins CI/CD pipelines

Led vehicle and fleet integration for eTicketing: gRPC streaming to on-board units, GTFS timetable sync, and event-driven integrations

Delivered React Native passenger and inspection apps with Firebase push, Google Maps APIs, and real-time trip planning; built portals and backoffice with .NET Core, React, and Angular

Integrated payment gateways, ERP systems, LDAP, and high-throughput detection pipelines using MongoDB, Redis, and background workers

Mentored developers and lectured at the company's internal academy for university students

Developed government digital services for Jedinstveno upravno mjesto (JUM), unifying citizen forms and requests into independently deployable Spring Boot applications

Implemented NIAS (eIDAS) SAML authentication with digital certificates and cryptographic identity verification

Integrated Internet Payment Gateway (IPG) and OKP (SOAP/GSB) and SRS (REST) government back-end services

Built React frontends embedded in WAR deployments with shared Gradle libraries for security, signing, and cross-service domain logic

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