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Arc Exclusive
Arc Exclusive

Senior Full-Stack Software Engineer - Full Time - Overlap with US timezone (Americas, Europe)

Location

Remote restrictions apply
See all remote locations

Hourly rate

Hourly rate

Min. experience

5+ years

Hours per week

40 hours

Duration

16 weeks

Required skills

GolangPythonReact

Freelance job
Posted 12 hours ago
Apply now
Actively recruiting / 19 applicants

We’re here to help you

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

Juliana TorrisiJuliana Torrisi, Recruiter

About the company

Every enterprise transformation starts with the same bottleneck: figuring out how work actually gets done. That information is scattered across tickets, emails, people's heads, regional habits, and documentation that's already out of date. Today the answer is hiring a consulting firm, spending months interviewing people and mapping processes, and getting a static deliverable that starts going stale immediately.

Our company builds a living process knowledge base. We take unstructured data that already exists (documents, tickets, conversations) and turn it into a structured, continuously updated picture of how work actually happens: where processes diverge, where exceptions cluster, where documentation doesn't match reality. Transformation teams get process understanding in days instead of months, and it stays current as the organization evolves.

We're backed by Lightspeed Venture Partners (portfolio includes Anthropic, Exa AI, Snorkel AI).

Every person on the team has built some version of the problem we're solving: turning messy process knowledge into structured, actionable intelligence

About this role

We're looking for a Senior Full-Stack Software Engineer to join as a core contributor at a critical stage: building the production platform from the ground up.

This is a contract role with high ownership and direct founder collaboration.

  • Impact: Young, clean codebase. Your architectural decisions will set the patterns for the platform.
  • Velocity: AI-assisted development (Claude Code, Cursor, Codex) is core to how we ship, not an afterthought.
  • Growth: Go back-end programming, React frontend, production LLM orchestration, and multi-agent systems. Full-stack ownership end-to-end.
  • Autonomy: Early engineering contributor with significant technical decision-making authority.
  • Problem space: Enterprise process knowledge is a massive, underserved market. You'll build the infrastructure that makes it accessible and actionable.

What we're looking for

Must-haves

  • 5+ years building production software, with experience shipping across the stack
  • Strong Go expertise: You write idiomatic Go. You're comfortable with chi/net-http routers, pgx for Postgres, structured logging with slog, and the standard library approach to problem-solving
  • Python proficiency: You can build and maintain Python services, work with async patterns, and integrate with AI/ML tooling
  • PostgreSQL skills: Database schema design, migrations, and production operations
  • React and TypeScript: You can build and maintain a modern React frontend (hooks, context, component composition)
  • Pragmatic mindset: You know when to refactor vs. ship, when to build vs. buy, and how to manage technical debt intentionally
  • Ownership mentality: You take end-to-end responsibility for features, from design through deployment and monitoring
  • Comfort with ambiguity: Early-stage startup means evolving requirements and shifting priorities

Strongly preferred

  • LLM/AI integrations: Experience building production systems that call LLM APIs (embeddings, completions, agents, multi-agent orchestration)
  • AI-assisted development: You already use tools like Claude Code, Cursor, Copilot, or similar to accelerate your work
  • Testing discipline: Building test frameworks, establishing coverage standards, writing meaningful tests (not just checkbox coverage)
  • Production operations: Observability, incident response, system reliability

Nice to have

  • Infrastructure as Code: Terraform, GCP, container orchestration
  • Real-time systems: Server-Sent Events (SSE), WebSockets, streaming APIs
  • Vector search / embeddings: RAG patterns, hybrid search

Our Tech stack

Backend

  • Go
  • PostgreSQL
  • Redis/Valkey
  • Datadog
  • GCP

Frontend

  • React 19 with TypeScript

Infrastructure

  • GCP
  • Terraform
  • Docker
  • GitHub

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