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Arc Exclusive
Arc Exclusive

Senior Backend/Data Platform Engineer (TypeScript/Node + PostgreSQL) - FT - WW

Location

Remote anywhere

Hourly rate

Hourly rate

Min. experience

5+ years

Hours per week

40 hours

Duration

2 weeks

Required skills

PostgreSQLAPI IntegrationData IngestionApache KafkaTypeScript

Freelance job
Posted 6 days ago
Apply now
Actively recruiting / 132 applicants

We’re here to help you

Cynthia is in direct contact with the company and can answer any questions you may have. Email

CynthiaCynthia, Recruiter

AI Full-Stack Engineer (Agentic Systems)

Why This Opportunity

Join an early-stage venture studio building an AI-powered platform designed to help startups go from idea to launch faster.

You'll work on a core internal product before it reaches customers, helping transform an MVP into a scalable production platform. This role combines full-stack engineering, AI agent development, and rapid product iteration, making it an excellent opportunity for builders who enjoy working with cutting-edge AI technologies and high levels of ownership.

About the Company

We're a venture studio that builds and scales technology companies from the ground up. As part of our product team, you'll help develop an AI-native platform that streamlines go-to-market execution for startups, with plans to evolve it into a commercial product used by founders and growth teams.

Why This Role Matters

You'll help define the technical foundation of a product before public launch.

Beyond building application features, you'll design AI-powered workflows that automate complex go-to-market processes, improve product quality through rapid iteration, and shape the architecture that supports future customers.

What You'll Build

  • Develop and maintain a production-ready web application, including both frontend and backend functionality.
  • Build secure authentication and user management workflows.
  • Strengthen backend architecture to improve reliability, scalability, and performance.
  • Design, build, and maintain AI agents that automate specialized business and growth workflows.
  • Integrate external AI APIs into agent pipelines and application features.
  • Create, evaluate, and optimize prompts and multi-step AI workflows using measurable output quality.
  • Build automation pipelines that replicate real-world expert processes.
  • Ship new features rapidly during the pre-launch phase and continuously improve the platform based on customer feedback after launch.
  • Collaborate closely with the founding team in an environment where requirements evolve quickly.

Who We're Looking For

Must Have

  • Strong professional experience building full-stack applications using JavaScript and TypeScript, with solid backend development expertise.
  • Experience with Python for backend services or AI-related functionality.
  • Proven experience developing AI agents, AI automations, or agentic workflows, including orchestration beyond simple prompt engineering.
  • Hands-on experience integrating external AI APIs into production applications.
  • Experience building secure web dashboards, authentication systems, and user management workflows.
  • Ability to design, evaluate, and improve prompts and AI pipelines using structured testing and benchmarking.
  • Comfortable working in fast-moving startup environments with evolving product requirements and minimal process.
  • Ability to independently prioritize work and deliver production-ready features quickly.

Nice to Have

  • Experience building or maintaining MCP servers.
  • Familiarity with AI development tools and coding assistants such as Claude Code, Cursor, Codex, or similar agent frameworks.
  • Experience with go-to-market automation, growth tooling, or marketing technology platforms.
  • Experience managing web servers, application deployment, and performance optimization.
  • Previous experience as an early-stage or founding engineer.

Tools & Technologies

Languages

  • TypeScript
  • JavaScript
  • Python

AI & Automation

  • AI agents
  • Agent orchestration
  • External AI APIs
  • Prompt engineering
  • AI workflow evaluation
  • Automation pipelines

Web Development

  • Full-stack web applications
  • Authentication
  • User management
  • Backend architecture
  • Dashboard development

Infrastructure

  • Web server management
  • Performance optimization
  • Production application architecture

Why You'll Enjoy Working Here

  • Help shape an AI product before its first public launch.
  • Work directly with experienced founders in a highly collaborative environment.
  • Significant ownership over architecture and product direction.
  • Flexible part-time schedule (10–30 hours per week).
  • Opportunity to grow into a full-time or founding engineer role across future venture studio companies.

Hiring Process

  • Written screening
  • Two interview rounds
  • Approximately 10-hour paid technical project

Ready to Apply?

If this opportunity aligns with your skills and career goals, we'd love to hear from you. You don't need to meet every preferred qualification to make a meaningful impact—we encourage you to apply if you believe you're a strong fit for the role.

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