About the Role
About the Role
The Software Engineer role involves joining a fast-growing B2B SaaS/AdTech company to build and operate high-performance backend services and APIs. The position requires strong backend engineering experience, particularly in real-time systems, and offers the opportunity to work with Rust and other typed languages.
What You'll Do
You’ll join a small, highly experienced engineering team working closely with Product to design, build and operate backend services and APIs at significant scale. Your work will include building and evolving real-time services handling billions of requests per day, developing public-facing reporting and configuration APIs, and contributing to new AI/agent integrations via MCP.
The environment is backend-first, although there will occasionally be opportunities to contribute in JavaScript/TypeScript. You’ll have genuine ownership of what you build – from architecture and development through to testing, deployment, observability and production.
Who You Are
We’re looking for 5+ years of backend software engineering experience, and you will have previously designed and operated an API in production. We’d particularly like to speak with engineers who have experience across:
- REST, OpenAPI and/or gRPC APIs, including authentication, versioning, quotas and documentation
- Rust, or production experience with a typed/systems language such as Go, C++, Kotlin or Scala
- SQL and large-scale analytical data platforms such as ClickHouse, BigQuery, Snowflake or Druid
- Cloud infrastructure, containers and Kubernetes
- CI/CD and production observability
- Owning services in production, including incidents, monitoring and on-call responsibilities.
Bonus Points
Experience with AdTech/programmatic, OpenRTB, Prebid, MCP/LLM integrations, TypeScript or Terraform would be a bonus, but isn't essential.
Compensation
Remote | Paris Time Zone | CDI contract | €65,000.00 per year
Benefits
The engineering team is around 10 experienced engineers, with technical decisions owned collaboratively by the team. It's fully remote and aligned to Paris working hours, with the team getting together in person for two days every three months.
Requirements
Backend Software Engineering
5+ years of experience in backend software engineering is required.
API Design and Operation
Experience designing and operating APIs in production is necessary.
Real-time Systems
Experience with high-throughput, real-time systems is essential.
Typed Systems Language
Experience with Rust or another typed/systems language like Go, C++, Kotlin, or Scala is important.
SQL and Data Platforms
Familiarity with SQL and large-scale analytical data platforms is required.
Nice to Have
Experience with AdTech/programmatic and related technologies is a plus.
Experience with cloud infrastructure and Kubernetes is beneficial.
Benefits
Remote Work
The position is fully remote, aligned to Paris working hours.
Collaborative Environment
Technical decisions are made collaboratively within a small team.
In-Person Meetings
The team meets in person for two days every three months.