• Independently guide the technical direction and implementation by the whole team within defined architecture in all stages from conceptualization to deployment. • Evaluate trade-offs between correctness, robustness, performance, and customer impact to ensure the development of the right solution, with client success at the forefront. • Create and lead the team's technical documentation and repository management practices, including tasks such as creating branches, pull requests, merges, etc. • Collaborate with product, design, and engineering teams to provide necessary oversight of architecture and dependencies influencing product strategy and direction. • Contribute to code reviews, documentation, and addressing complex bug fixes with a focus on security, performance, and reliability. • Be an active leader in the Engineering Practice community, mentoring Senior Engineers and others through Communities of Practice (CoPs) or on project teams, supporting the growth of technical capabilities.

• Design and implement RESTful APIs with Spring Boot 3 (Web and WebFlux) • Implement and maintain complex KPI calculation logic (SFC Index, ranking, incentives) • Manage database schema evolution with Flyway migrations on PostgreSQL • Integrate with Azure Active Directory (OAuth2 / JWT) for authentication and authorization • Maintain a Redis caching layer for high-frequency KPI reads • Integrate with external systems • Send email notifications via SendGrid and push notifications via APNs (Pushy) • Manage secrets using AWS Secrets Manager • Write unit and integration tests (JUnit 5, Mockito, Spring Security Test) • Document APIs with OpenAPI / Springdoc UI • Participate in maintenance of the Jenkins CI/CD pipeline

Role Description We are looking for a senior Ruby on Rails developer 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.

• Design and implement Backend For Frontend (BFF) and API Gateway solutions using Kotlin. • Develop robust integrations with the AWS ecosystem (Lambda, EC2, S3, and DynamoDB). • Ensure the performance, security, and scalability of the developed APIs. • Contribute to architectural decisions, proposing continuous improvements and new technical solutions. • Actively participate in technical refinements and sprint planning with the team. • Collaborate with cross-functional teams to ensure smooth integration and high-quality deliveries.