Hexa

Founding Platform Engineer

Hexa

full-time

Posted on:

Location Type: Remote

Location: France

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Tech Stack

BigQueryCloudJavaScriptKafkaNext.jsPostgresReactTerraformTypeScript

About the role

  • Own the multi-tenant platform. Architect and maintain the infrastructure that hosts hundreds of MCP codebases. Each isolated, each configurable, all observable from a single pane of glass (or MCP).
  • Build the data backbone. Design the pipelines that aggregate statistics, analytics, and performance metrics across every deployed instance. Make the data real-time, reliable, and actionable.
  • Ship the core app. Work hands-on in the main Waniwani application: a Next.js/TypeScript codebase with Drizzle ORM, React Query, and a modern component architecture. You'll build features that customers and internal teams use daily.
  • Design for scale. Make architectural decisions that hold at 10x. Multi-codebase deployment strategies, database partitioning, caching layers, job queues. Whatever the problem demands.
  • Automate everything. CI/CD pipelines, codebase provisioning, health monitoring, rollback systems. If a human has to do it twice, you build a system to do it forever.
  • Instrument relentlessly. Logging, tracing, alerting. When something breaks at 2am across 300 instances, the system should tell you exactly where and why, before anyone notices.
  • You'll work directly with the CTO. The architecture is yours to shape. The stack is TypeScript end-to-end.

Requirements

  • You've built and operated systems at real scale. You've dealt with multi-tenant architectures where tenant isolation actually matters. You've managed codebases that couldn't fit in one repo and data that couldn't fit on one machine.
  • You're a senior engineer with 5+ years of production TypeScript. You've been the person on-call when things break and the person who redesigns systems so they stop breaking.
  • You think in systems, not features. When something works for one customer, you make it work for a thousand.
  • Native or bilingual English required. French is a plus.
  • Experience with multi-tenant SaaS platforms (tenant isolation, provisioning, billing)
  • Built or operated big data pipelines (Kafka, ClickHouse, BigQuery, or similar)
  • Deep PostgreSQL knowledge: partitioning, query optimization, connection pooling at scale
  • Infrastructure-as-code experience (Terraform, Pulumi, or similar)
  • Familiarity with MCP (Model Context Protocol) or LLM tool-use ecosystems
  • Contributed to open-source infrastructure projects
  • Experience with Next.js, Drizzle ORM, or similar modern TypeScript stacks
  • Managed deployments across multiple cloud providers or edge networks
  • Built internal developer platforms or deployment automation
Benefits
  • Ruthless execution. Execution is what differentiates average outcomes and startup failure from massive impact. You will learn to execute surrounded by relentless doers and extremely ambitious teammates.
  • Ownership. You'll architect the entire platform infrastructure from the ground up.
  • Category creation. You won't join a market. You'll contribute to defining a category.
  • Global. We sell global from day 0: US, Australia, Middle East, Korea… with offices in Paris, San Francisco, New York, and remote across Europe.
  • Real equity. Meaningful ownership at the earliest stage.
  • Best prep for founding. If you want to start your own VC-backed venture, this is the best battlefield to train on.
Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills & Tools
TypeScriptNext.jsDrizzle ORMPostgreSQLKafkaClickHouseBigQueryTerraformPulumiCI/CD
Soft Skills
system thinkingproblem-solvingcommunicationcollaborationleadership