Role Description We are looking for a Senior Ruby on Rails Engineer to help us build reliable, scalable products and apply AI/LLM technologies where they create real value. This is a hands-on engineering role for someone who can own complex features end to end, make strong technical decisions, and work across backend architecture, production systems, testing, and AI-assisted product development. You should be excited about AI, but pragmatic enough to know when a simple, deterministic solution is better than an LLM call. - Owning features from technical design to production - Building and maintaining Ruby on Rails systems used at scale - Designing AI/LLM-assisted features and workflows where they improve product quality or user experience - Working with LLM APIs, prompts, retrieval/context strategies, and AI-assisted development tools - Making trade-offs around performance, reliability, cost, latency, security, and maintainability - Writing and maintaining automated tests, including unit, integration, and E2E tests - Debugging production issues and improving system reliability Qualifications - Strong professional experience with Ruby on Rails, ideally at senior level - Experience building and running production systems used by real customers - Strong backend skills, including databases, API design, performance, background jobs, and security - Ability to break down ambiguous problems and propose practical technical solutions - Hands-on interest or experience with AI/LLM technologies - Good judgment about when to use AI and when simpler engineering approaches are better - Strong testing habits and care for long-term code quality - A responsible, curious, flexible mindset: willing to debug, deploy, investigate, learn, and own outcomes Requirements - Nice to have: - Experience with React - CI/CD, background jobs, or AWS experience - Experience building AI-powered product features in production - Familiarity with embeddings, vector search, RAG, evals, or LLM observability - Experience with text-processing, localization, translation, or multilingual products Benefits - Stable & self-funded: Founded in 2007, profitable, and independent. - Industry leaders: Creators of WPML, the #1 multilingual plugin for WordPress, used on 1.5M+ sites - Fully remote, async-friendly: Work from anywhere within EMEA hours - Engineering-driven culture: Ownership, autonomy, testing, and thoughtful problem-solving - Fair compensation and great benefits: Designed to support your well-being both inside and outside of work.

• Build and ship multi-agent orchestrator systems using Claude Code / agent frameworks • Design agent roles, workflows, and memory structures for real business operations • Implement coordination logic between agents (task delegation, state passing, retries) • Ensure systems are production-ready (not demos or notebooks) • Continuously refine agent behavior based on real-world execution outcomes • Convert business workflows into automated AI-driven pipelines • Build standalone agent SDKs and reusable automation modules • Design systems that execute multi-step business processes without human intervention • Ensure workflows are reliable, observable, and maintainable in production environments • Optimize for failure recovery, not just successful execution paths • Design and implement PostgreSQL schemas for agent systems and workflows • Build Supabase-backed applications powering AI agents and automations • Ensure data integrity across multi-agent operations • Structure databases for real-time agent execution and state tracking • Debug and optimize backend performance when workflows break • Build and maintain production API integrations across business tools • Connect AI agents to external systems (CRMs, property tools, communication tools) • Handle authentication, rate limits, retries, and failure states • Ensure integrations are stable and production-safe, not experimental scripts • Debug end-to-end system flows when integrations fail • Take systems from architecture → build → deployment → production use • Package AI systems into usable tools or SDK-like deliverables • Ensure systems are deployable, maintainable, and configurable • Write clean, production-grade code (not prototypes or notebooks) • Maintain and improve systems after deployment based on real usage • Identify missing requirements without being told • Break down ambiguous system requests into buildable components • Choose implementation paths independently • Debug production issues without escalation dependency • Maintain momentum without waiting for structured assignments

• Design, build, and operate backend systems for a high-growth B2B SaaS platform • Architect, implement, and maintain scalable backend services and APIs in PHP and Go • Handle integrations and background processing as the product requires • Own data modeling and persistence, including relational databases and caching • Participate in CI/CD and operational practice with the team • Support production and customer-impacting issues • Provide technical leadership, code review, architectural guidance, and mentorship to junior developers

Role Description A Java Web Developer builds and maintains dynamic web applications using Java-based server-side technologies, developing features across the presentation and application layers in collaboration with designers, back-end engineers, and stakeholders. - Develop server-side web logic using Java EE, Jakarta EE, or Spring MVC, building maintainable and well-tested application components. - Build and maintain web UIs using templating engines like JSP or Thymeleaf, or integrate with modern JavaScript front-end frameworks. - Design and query relational databases using MySQL, PostgreSQL, or Oracle, ensuring efficient schema design and query performance. - Implement and consume RESTful web services, documenting endpoints clearly for front-end teams and third-party consumers. - Ensure cross-browser compatibility and responsive layouts across a range of devices and screen sizes. - Apply web security best practices including OWASP guidelines, CSRF protection, and XSS prevention throughout the application layer. - Maintain and deploy applications on servlet containers such as Tomcat or JBoss, supporting both on-premise and cloud environments. Qualifications - 2+ years of Java web development experience with a solid understanding of the request-response lifecycle and HTTP fundamentals. - Practical experience with Spring MVC or Java EE / Jakarta EE for building enterprise-grade web application components. - Proficiency in HTML5, CSS3, and JavaScript (ES6+) for building and styling interactive front-end pages. - Experience with server-side templating using Thymeleaf, JSP, or a comparable view technology. - Solid SQL skills and experience using JDBC, JPA, or Hibernate to interact with relational databases. - Familiarity with deploying applications to Tomcat, JBoss, or WildFly in development and production environments. - Proficiency in English.