Role 

We are looking for an AI Operations Engineer to join our team. This is a hybrid role based in our Zagreb office, reporting to Dominik Jurincic within the Red Teaming department. As an AI Operations Engineer, you will support the AI Red Team by operating and scaling the evaluation infrastructure that powers SPLX’s model benchmarks and MCP server registry. You’ll be the engineering force behind our continuous AI security testing workflows, ensuring our evaluation pipelines run reliably across a rapidly expanding ecosystem of LLMs and agentic tools.

What you’ll do (Role Expectations)

• Operate and extend our LLM benchmarking pipeline by integrating new models — whether through provider APIs or self-hosted deployments on virtualized infrastructure — and executing our security suite to populate and maintain the model benchmarks page
• Kick-off and maintain the SPLX MCP server registry by onboarding open-source MCP servers, provisioning their runtime dependencies, and running our dynamic code scanning and security testing against them
• Build and maintain reproducible deployment environments for evaluating third-party AI systems, ensuring consistent and reliable test conditions across diverse model and tooling configurations
• Partner with Red Team engineers and researchers to streamline evaluation workflows, automate recurring testing operations, and surface insights from benchmark and registry data
• Continuously improve the team’s internal tooling and operational processes, identifying opportunities to reduce manual effort and accelerate the cadence of model and MCP evaluations

Who You Are (Success Profile)

• You thrive in ambiguity. You're comfortable building the path as you walk it. You thrive in a dynamic environment, seeing ambiguity not as a hindrance, but as the raw material to build something meaningful.
• You act like an owner. Your passion for the mission fuels your bias for action. You operate with integrity because you genuinely care about the outcome. You adapt to what’s needed, navigating seamlessly between high-level strategy and hands-on execution.
• You are a high-trust collaborator. You are ambitious for the team, not just yourself. You embrace our challenge culture by giving and receiving ongoing feedback—knowing that candor delivered with clarity and respect is the truest form of teamwork and the fastest way to earn trust.
• You are a learner. You have a true growth mindset and never stop developing yourself, actively seeking feedback to become a better partner and a stronger teammate. You love what you do and you do it with purpose.
• You operate with urgency. You understand that in a high-growth environment, speed and quality are not mutually exclusive. You have a relentless focus on execution and a bias for action, delivering high-impact results quickly to win for the customer and the team.

What We’re Looking for (Minimum Qualifications)

• 1+ years of professional software engineering experience with Python, including the ability to ship reliable, production-quality code in a collaborative environment
• Working familiarity with the modern AI/ML ecosystem, including LLM provider APIs, model deployment patterns, and emerging protocols such as the Model Context Protocol (MCP)
• Hands-on experience with containerization (Docker) and deploying applications across cloud or virtualized infrastructure
• Solid working knowledge of REST APIs and modern integration patterns, including authentication, service orchestration, and debugging across distributed components
• Strong attention to detail and a track record of operating consistently in environments where reproducibility, rigor, and follow-through matter

What Will Make You Stand Out (Preferred Qualifications)

• Prior exposure to LLM evaluation, AI security, or red teaming workflows in a research or applied setting
• Familiarity with the broader open-source AI tooling landscape — including MCP servers, model serving frameworks, or agentic systems — and the curiosity to keep up with a fast-moving space
• Background in DevOps, platform engineering, or infrastructure automation, with comfort building reproducible test environments at scale

#LI-MM8 

#LI-HYBRID

Think of a product. Like lean, mean software. For sports betting. With the best possible real-time solutions. Now think of innovating the testing process. Stopping bugs from reaching production. Paying special attention to how and what is delivered. Directly tailoring the experience for tens of thousands of people daily. Sounds interesting?

What You’ll Be Doing:

• Be responsible for designing, implementing, and managing automated tests across the product suite
• Design and implement comprehensive test automation solutions that encompass web applications, web services (microservices), and native apps. Ensure coverage across various testing types, including UI testing, API testing, and others, to support robust quality assurance practices
• Collaborate with business stakeholders to define acceptance criteria for software projects
• Be jointly responsible for the maintenance and quality of codebases and infrastructure
• Issue Investigation and Reporting
• Quality Control: Ensure we have vital checks on all our products (metrics, health checks) dashboards, ensure critical business scenarios are covered and automate them.
• Making sure tests run in Continuous Integration

We Are Looking for Someone Who:

• Has a minimum of Bachelor’s degree in Computer Science or a related discipline
• Is highly proficient in Functional or Object-oriented programming
• Has strong understanding of QA processes and demonstrated experience in defining and implementing test designs from scratch
• Has extensive experience with test automation tools (Selenium, Cypress, Playwright etc.)
• Has extensive experience writing backend tests (API, unit, database) and testing RESTful services using tools such as Postman or SoapUI
• Has understanding of Non-Functional testing, especially Load and Performance testing
• Prefers a shift-left testing approach

Nice to Have:

• ISTQB certification
• Experience with BDD (Behaviour Driven Development)
• Knowledge of Ruby or JavaScript
• Experience using Xray or similar Test Management tool
• Experience with event-driven architecture (Kafka, AWS, Docker etc.), preferably in a Product environment

Senior Fullstack Engineer

If you love building software that actually matters — and you're energised by the idea of shipping production-grade features across the full stack while working in a team where AI is a genuine daily collaborator, not a buzzword — this role is for you. You'll own end-to-end delivery on Duetto's core revenue platform, drive a major migration from monolith to microservices, and help shape how the team engineers at scale.

What Makes Us Different?

Duetto is the hospitality industry's leading revenue management platform, founded in 2012 by former Wynn Resorts executives who knew the industry needed better technology. We built the world's first Revenue & Profit Operating System — a suite of tools (GameChanger, ScoreBoard, BlockBuster, Advance and more) that goes beyond room pricing to give hotels, resorts and casinos a complete picture of their revenue and profitability. Trusted by clients ranging from independent boutique hotels to global chains, we've been named the #1 Revenue Management Software by HotelTechAwards four years running and the #1 Best Place to Work in Hotel Tech in 2025. Backed by GrowthCurve Capital since 2024, we're accelerating our investment in AI — and we're genuinely passionate about the industry we serve. We build products we're proud of, for customers we care about.

What You'll Be Doing

• You'll own full-stack feature delivery end-to-end — from requirements through to production — across Java/Spring Boot microservices and TypeScript/React frontends, including monitoring and troubleshooting in live environments.
• You'll make independent architectural decisions and convert prototypes into scalable, maintainable production systems, collaborating closely with Product, Design, and Engineering to hold a high bar for end-user quality.
• You'll drive the migration of our legacy monolith, applying Domain-Driven Design principles, event-driven architecture patterns, and structured decomposition strategies to modernise software at scale.
• You'll champion test quality by writing automated end-to-end tests in Cypress or Playwright and embedding data-driven testing practices across the team.
• You'll mentor peers on prompt engineering, AI-assisted development, and code review — operating confidently in a generate-and-review model where 50–70% of code is AI-generated.
• You'll contribute to and improve AI-augmented engineering workflows, building and refining custom skills, agents, and agentic pipelines that accelerate the whole team's delivery velocity.

What We're Looking For

You may be a good fit if you have:

• 4–6 years of full-stack engineering experience with production depth across both backend and frontend
• Strong proficiency in Java and Spring Boot for enterprise backend development
• Strong proficiency in TypeScript and React for modern web applications
• Experience building and maintaining GraphQL APIs
• Solid working knowledge of SQL and NoSQL databases, particularly MongoDB
• Hands-on experience with end-to-end testing frameworks — Cypress or Playwright
• A working understanding of microservices architecture and event-driven integration patterns
• Demonstrated experience with Claude Code CLI or a comparable AI code generation tool — you're comfortable in a generate-and-review workflow, not just curious about it

Strong candidates may also have:

• Experience in or exposure to the hospitality technology sector
• A background in legacy modernisation — monolith decomposition, migration planning, or similar
• Familiarity with Domain-Driven Design (DDD) in an enterprise context
• Experience with AI code review tools such as CodeRabbit or Augment
• Working knowledge of AWS, Kubernetes, and CI/CD pipeline management

Why Duetto?

• AI isn't a side project here — it's how we work. With 50–70% of code AI-generated and a team actively building custom agents and agentic pipelines, you'll be operating at the frontier of how software gets built.
• Real architectural ownership. This is a high-autonomy IC role — you'll make independent technical decisions that shape the platform, not just implement tickets.
• Work that ships. We move fast, hold a high bar, and care deeply about what we put in front of customers. If you want to see your work in production, you will.
• A mission worth caring about. Hospitality is a people industry, and we help the people running it do their jobs better. That's something to feel good about.
• Fully remote from Split, Croatia, with a global team that takes collaboration seriously.

The Details

• Location: Split, Croatia
• Work model: Remote

Duetto is an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees. All qualified applicants will receive consideration for employment without regard to race, colour, religion, sex, sexual orientation, gender identity, national origin, disability, veteran status, or any other characteristic protected by applicable law.

Sound like you?

You don't need to tick every box — if this role excites you and you're strong across most of what we're looking for, we'd love to hear from you. Apply and tell us what you'd bring.

#LI-REMOTE

Think of a product. A lean, high-performance software solution for sports betting. Built to deliver the best real-time experience. Now think of ensuring its reliability. Preventing critical bugs from reaching production. Driving automation and continuous testing at scale. Making sure that every release meets the highest quality standards. Sounds like a challenge worth taking?

Join us and play a key role in shaping how we release and test products that serve hundreds of thousands of users daily.

What You'll Be Doing:

• Designing, implementing, and managing automated test solutions across web applications, microservices, and native apps, ensuring comprehensive test coverage, including UI, API, and integration testing.
• Establishing and maintaining test frameworks that integrate seamlessly into the CI/CD pipeline, defining critical business scenarios and automating them for robust quality assurance.
• Owning the release validation process, ensuring every deployment is thoroughly tested, risks are mitigated, and issues are reported promptly.
• Collaborating closely with development teams to analyze issues, improve test coverage, and drive continuous improvement.
• Ensuring automated tests run efficiently in the continuous integration environment, contributing to a fast, stable, and reliable release process.
• Taking ownership of test automation codebases, ensuring high standards, scalability, and maintainability.

What We're Looking For:

• At least five years of experience in testing, with a strong focus on test automation and release processes.
• Strong programming skills in functional or object-oriented languages.
• Deep understanding of testing processes and experience defining test strategies from scratch.
• Hands-on expertise with test automation tools such as Selenium, Cypress, or Playwright.
• Experience working with CI/CD pipelines and integrating automated tests into the deployment process.
• Demonstrated experience in implementing data-driven approaches for test execution monitoring, including setting up observability tools, tracking test behavior over time, and leveraging data insights for decision-making.
• Shift-left testing mindset, emphasizing early defect detection and automation.

Bonus Points For:

• ISTQB certification.
• Experience with BDD (Behavior-Driven Development).
• Knowledge of Ruby or JavaScript.
• Experience in backend testing, including API, unit, and database testing, and in testing RESTful services using tools like Postman or SoapUI.
• Experience with non-functional testing.

If you are a highly skilled QA engineer passionate about automation, release quality, and continuous improvement, this is the opportunity to make a significant impact!