• Understand high-level requirements and collaborate to find solutions • Investigate technologies to gain a deep understanding of their applicability • Develop high-quality code • Problem-solving deeply technical issues • Build tests at all stages of development from, unit tests to acceptance & performance tests • Build deployment code and pipelines, consulting with DevOps specialists • Analyse and resolve issues from 3rd line support • Collaborate in code development and review colleagues’ work • Participate in indicative estimating & planning • Any other reasonable duties relevant to skills and experience.

• Migration and modernization of existing application components (JavaEE/JakartaEE) to a future-proof architecture • Further development and optimization of legacy systems with a focus on stability, maintainability, and scalability • Design and implementation of robust REST APIs, including versioning and ensuring backward compatibility • Implementation of zero-downtime deployments in a highly available 24/7 environment • Integration and further development of existing CI/CD, deployment, and monitoring processes • Close collaboration within a small, experienced team and independent delivery of technical solutions

Role Description As a Senior Ruby on Rails Developer you will work on a production Rails application that includes customer-facing features, internal systems, and external integrations. This role owns work end-to-end, from design and implementation through testing, performance, and production readiness. - Design, build, and maintain features in a modern Rails codebase. - Own background and asynchronous workflows including retries, idempotency, throughput, and observability. - Model, query, and optimize data in a document-oriented datastore environment. - Build and maintain HTTP APIs and third-party integrations including webhooks, authentication, billing, and notifications. - Diagnose and resolve production issues in collaboration with product and support. - Improve system reliability, performance, and operational safety. - Contribute to long-term code health through refactoring, testing improvements, security practices, and thoughtful code review. Qualifications - C1 English or equivalent. - Senior-level, hands-on experience building and operating production Ruby on Rails applications. - Strong background in background job systems and asynchronous processing with real-world operational concerns. - Experience designing and querying document-oriented data models with attention to indexing and performance. - Experience building external-facing APIs with authentication, authorization, and rate limiting. - Strong testing discipline and experience diagnosing flaky or non-deterministic tests. - Security-minded approach to application design and production operations. Preferred Qualifications - Experience working with high-growth startups. - Experience building products using LLMs or LLM-based agents. Ideally, using Langchain. - Experience training AI models: building, cleaning datasets, setting up training pipelines, and evaluation benchmarks. - Experience building code generation or editing solutions. - A team-player mentality with a history of influencing and improving development processes. Nice to Have - Email and Deliverability Domain. - Experience with Go. - Practical understanding of email deliverability fundamentals including reputation, mailbox provider behavior, and bounce or deferral handling. - Familiarity with email authentication and DNS concepts including SPF, DKIM, DMARC, and MX or TXT records. - Understanding of SMTP mechanics such as handshakes, response codes, and safe retry strategies. - Experience identifying and handling low-quality or risky email data such as disposable, role-based, typo, or catch-all addresses. - Experience building safeguards around email data handling including redaction, privacy controls, and non-production send protections. - Comfort using AI-assisted development tools responsibly while maintaining strong engineering judgment, code quality, and test coverage. Compensation - $5000 to $7000 USD/ monthly PTO - Unlimited Holidays - US or local

• Develop backend functionality in Drupal. • Build and maintain custom modules. • Implement REST integrations for decoupled architectures. • Optimize platform performance and scalability. • Apply development best practices (Clean Code, SOLID, design patterns). • Participate in code reviews and technical collaboration with the team. • Manage tasks and tracking using Jira. • Actively participate in agile ceremonies (dailies, planning, etc.).