Senior AI Fullstack Engineer
E
Etera Technologies FZCOCorporate Travel
Kyiv, Ukraine. Moscow, Moscow, Russia. Sweden. United Arab Emirates. Poland. SerbiaFull-TimeSenior
Salary not disclosed
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Job Details
- Languages
- English, Arabic, German
- Experience
- 5+ years
- Required Skills
- React NativeTypeScriptRESTful APIsLangChain
Requirements
- 5+ years of professional fullstack engineering, with meaningful production work in mobile
- Strong React Native track record – shipped apps, managed build pipelines, handled auth flows
- TypeScript across the entire stack – mobile, backend, and agent tooling
- Hands-on with LLM APIs (Anthropic, OpenAI, or equivalent) – prompt engineering, tool/function calling, multi-turn context management
- AI-augmented development: use Claude Code, Codex, and similar agentic coding tools to achieve 10x engineering throughput
- Production experience with Mastra as an agent orchestration framework – workflows, tool definitions, agent memory, and inter-agent coordination patterns
- Solid working knowledge of LangChain – chains, retrieval, tool use, memory backends, and integration into live backend services
- Ability to operate as a full engineering team member – not a specialist silo, shipping frontend, backend, and AI layers
- Comfort in a lean startup environment: fast cycles, high ownership, minimal process overhead
- Strong written English
- Proven agent team ownership: built one or more autonomous agent teams from scratch
- Self-validating mindset: act as the primary validation layer for the systems you build
- Cross-domain fluency: agents have touched multiple domains
- Maintenance discipline: track record of keeping agent systems healthy over time
- Full-stack integration: connect agent teams to real product surfaces
Responsibilities
- Build and maintain Etera's React Native app (Expo/TypeScript) – booking flows, real-time updates, multilingual UX (Arabic/English)
- Design and extend our TypeScript backend, including booking APIs, supplier integrations (PKfare, RateHawk, Hotelbeds), and webhook orchestration
- Work directly with Claude (Anthropic API) and our multi-agent OPUS Prime system – building, tuning, and extending AI pipelines for travel intent detection, QA, and automated engineering reports
- Take features from spec to production, owning the full lifecycle – architecture, implementation, testing, deployment
- Manage infra & reliability: Firebase Auth (OTP, Apple, Google), EAS Build/TestFlight pipelines, and CI/CD hygiene across the stack
- Participate in security audits and peer review within a small, high-trust engineering team
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