Senior Full Stack Engineer (Python / React / AWS) - AI-Accelerated Development

Adwisely is an Ad Tech SaaS on Shopify that helps e-commerce businesses run ads on Meta and Google. We're evolving from a setup wizard into an AI that analyzes a store, identifies the best product opportunities, generates creatives, launches campaigns, and optimizes them automatically. The merchant sets a ROAS target and Adwisely does the rest. We're looking for a senior engineer to take real ownership of the product and help us ship the next chapter. What you'll own In the first months, you'll get deep into the existing platform: stabilize, maintain, and build context. Then you'll move into building: AI-native experience. Store intelligence that analyzes a merchant's data, scores products by predicted ROAS, and drives every campaign decision automatically. Shopify-deep integration. Adwisely should live where merchants already work: Shopify admin, Sidekick, Flow, not as a separate tool they have to visit. Platform reliability and UX improvements. Bulletproof onboarding, ROAS optimisation, clearer performance visibility. Quality at every stage. You own QA as part of the delivery process. That means writing specs that include acceptance criteria, reviewing AI-generated code critically before merging, and making sure each feature is tested before it ships. How we work We build with AI-assisted development. The workflow is: write a tight spec, generate the implementation, review and refine, ship. You don't need to write every line from scratch. You need to spec well, review confidently, and maintain a high bar for what gets merged. You'll work directly with the company founders. No PM layer, no sprint ceremonies. Requirements 5+ years with Python and React in production Hands-on experience with AWS: EC2, RDS, S3, Lambda, or similar Comfortable owning the full stack: React frontend, Python backend, cloud infrastructure Experience with at least one of: Shopify APIs, Meta Marketing API, Google Ads API Used to being the primary engineer and making architectural calls without a lot of hand-holding Experience with AI coding tools (Cursor, Claude Code, Copilot) QA as part of shipping: you write tests, review diffs carefully, and don't consider something done until it's verified Nice to have Experience building or maintaining Shopify apps Familiarity with LLM API integration (OpenAI, Gemini) Background in ad tech or performance marketing What we offer Real equity: joining as the primary engineer at a pivotal moment Architecture ownership: meaningful decisions, not just tickets Fully remote, flexible schedule Competitive salary Paid vacation