Staff Platform Engineer - Apps & Workflows

Reflection; Greater London; On-site; GBP 90,000 - 130,000; Full time

Benefits offered by this job

Top-tier compensation

Stock options

Health & wellness benefits

Meals in office

Parental leave

Unlimited vacation (UK)

Sponsorship support

Team building

Job summary

Reflection is a research lab focused on open, accessible intelligence. This role sits at the intersection of engineering and product, translating ambiguous requirements into solid, production‑ready systems.

You will help turn platform capabilities into usable workflows and collaborate across research, platform, and product to accelerate open foundational models. Join a high‑agency, fast‑paced team and help build dashboards, APIs, authentication flows, and governance tooling that scale with

Qualifications

• Strong full‑stack engineering background.
• Experience shipping production‑grade applications end‑to‑end.
• Experience integrating with external systems or customer environments.
• Thriving in a high‑agency, fast‑paced environment; bias toward action and impact.

Responsibilities

• Build internal product surfaces such as dashboards, admin tools, and self‑serve workflows.
• Own end‑to‑end delivery across UI, APIs, authentication, RBAC, and audit trails.
• Integrate with customer environments and adjacent systems to ensure seamless workflows.
• Productionize prototypes into reliable, maintainable platform components.
• Translate fuzzy product requirements into clear system designs and usable interfaces.
• Feed delivery learnings back into platform patterns and defaults.

Skills

Full-stack engineering

End-to-end delivery

External integrations

Collaborative communication

Open-weight AI systems

Tools

React

TypeScript

REST

gRPC

FastAPI

Go services

API design

OIDC authentication

RBAC

Audit logging

Job description

Reflection is a research lab focused on open, accessible intelligence. This role sits at the intersection of engineering and product, translating ambiguous requirements into solid, production‑ready systems.

You will help turn platform capabilities into usable workflows and collaborate across research, platform, and product to accelerate open foundational models. Join a high‑agency, fast‑paced team and help build dashboards, APIs, authentication flows, and governance tooling that scale with