Senior Agentic Software Engineer Poolday - A Players

Europe based candidates | Remote

A-Players is helping Poolday hire a Senior Agentic Software Engineer to build the core agent systems behind a next-generation AI-powered video editor. Poolday is creating a new category of creative tooling that combines a traditional timeline-based editor with autonomous AI agents that can understand intent, generate visuals, and manipulate projects end-to-end.

This role will work closely with the founders and early engineering team to design and implement the agentic architecture that powers the product. This is a high-ownership position with significant influence over system design, product direction, and engineering culture.

About Poolday

Poolday is building a modern video editor where users describe what they want, and intelligent agents assemble compositions, generate pixels, and perform edits autonomously. The product blends familiar creative workflows with cutting-edge agentic AI systems.

The founding team consists of experienced operators and builders with a strong track record of shipping complex products. Poolday is early-stage, product-driven, and focused on building category-defining creative tools. What You’ll Be Doing

Designing and building multi-agent systems in TypeScript , including a primary orchestration agent and specialized sub-agents

Architecting agent workflows that interpret user intent, plan multi-step edits, and execute them across a video timeline

Building the interface layer between agents and the video editor , enabling agents to read project state, issue commands, and observe results in real time

Developing agent capabilities for scene composition, visual generation, timing adjustments, effects, and compositing

Implementing plan-and-execute loops , recovery strategies, and feedback mechanisms for reliable autonomous editing

Creating memory and context systems that allow agents to reason about project state, user preferences, and editing history

Working closely with founders to shape both the product vision and the technical foundations of the platform

Must-Have

5+ years of professional software engineering experience with strong system design skills

Deep expertise in TypeScript , including building large, maintainable codebases

Experience building complex front-end or editor-like applications using React

Hands-on experience with agentic systems (e.g. LangChain.js, LangGraph.js, Vercel AI SDK, or custom agent frameworks)

Strong understanding of agent orchestration patterns such as hierarchical delegation, multi-agent collaboration, and plan-and-execute loops

Experience designing APIs or command layers to programmatically control complex applications

Strong prompt engineering skills, including function calling and structured outputs

Ability to work independently in ambiguous, fast-moving environments Nice to H