Senior Full-stack Engineer - AI (Bulgaria - Remote, World Wide, BG)

Wiser Technology designs, builds, and scales complex software systems that power real-world impact. With 500+ engineers and over 25 years of experience in mission-critical environments, we help global organizations turn ambitious ideas into working solutions. Across Europe, MENA, and North America, we combine deep engineering expertise with AI and data to support leading companies in aerospace & defense, automotive, telecom & media, IT, and financial services. We are looking for a Senior Full-stack Engineer to join our team building and running high-profile, next-generation AI platforms for executive and strategic clients. You will anchor the AI-heavy Python backend, turning LLM capabilities into dependable services, and independently build the React/Next.js frontends your features need. This is a high-autonomy role with real ownership: you take features from design to production, shape technical design within established architectures, and keep live systems reliable. Depending on the engagement, you will either help build new capabilities on an AI platform under active development, or join a dedicated managed-support team that keeps live AI platforms stable, secure and improving after go-live. Core Responsibilities: End-to-End Delivery: Design, build and ship production-ready, well-tested features across a Python backend and React/Next.js frontends. AI Integration: Turn LLM capabilities, including retrieval over clients' own content, into dependable product features.