# Senior Engineer

Senior Engineer London Permanent Hybrid Working - 3 days in the office, 2 days remote We run the campaigns ourselves, so we know exactly what the software has to do. Buttermilk is a London creator-marketing agency. Pantry is the platform our team, our creators and our clients use to run campaigns end to end. It is live with our internal team today. The demand is already here: every campaign we run is waiting on this platform. Why this is different Search and reporting are table stakes. The hard part is the operational core: shortlists clients actually approve, outreach that lands, creators paid on time, and AI that understands the Creator. Most creator platforms are built by people who have never run a campaign. Ours is built next to the team that runs them every day. What you'd own The platform that takes Pantry from alpha to what the whole agency runs on. If you want to point at a platform in production and say you built it, this is that seat. You code every day, set the architecture and work as the product partner to Matt, our Product Lead. Build. Ship vertical slices that real users can try, quickly but built to last. Direct AI coding agents and review their output critically.

- **Id**: 4076069
- **Url**: <https://alion.io/job/butter-milk-senior-engineer>
- **Role**: Backend
- **Role family**: Backend
- **Seniority**: senior
- **Employment type**: full_time
- **Work mode**: hybrid
- **Hiring geo confidence**: structured
- **Locations**: London, United Kingdom
- **Countries**: GB
- **Hiring countries total**: 0
- **Visa sponsorship**: no
- **Relocation package**: no
- **Has equity**: no
- **Status**: live
- **First seen at**: 2026-10-20T14:48:20Z
- **Employer posted date**: 2026-10-20
- **Last verified at**: 2026-11-11T15:20:30Z
- **Board verified**: yes
- **Days open**: 22
- **Description format**: text
- **Description chars**: 4008
- **Description truncated**: no
- **Benefits**: Health insurance, Home office, Hybrid work
- **Relocation offered**: no
- **Industries**: Digital Media, Creator & Fan Platforms

## Company

- **Id**: 3894318
- **Name**: Butter Milk
- **Domain**: buttermilk.com
- **Url**: <https://alion.io/company/buttermilk>
- **Size band**: 51-200
- **Is staffing agency**: no
- **Employer type**: direct
- **Is intermediary**: no
- **Ats vendor**: Teamtailor

## Technologies

- **CI/CD** — Optional: no
- **FastAPI** — Optional: no
- **GCP** — Optional: no
- **GDPR** — Optional: no
- **GitHub Actions** — Optional: no
- **Google BigQuery** — Optional: no
- **Google Cloud Run** — Optional: no
- **LLM** — Optional: no
- **Multimodal AI** — Optional: no
- **Next.js** — Optional: no
- **PostgreSQL** — Optional: no
- **Python** — Optional: no
- **SOC 2** — Optional: no
- **SQL** — Optional: no
- **SQLModel** — Optional: no
- **Structured Outputs** — Optional: no
- **Terraform** — Optional: no
- **TypeScript** — Optional: no
- **JavaScript** — Optional: yes
- **React.js** — Optional: yes

## Trust

- **Level**: ok
- **Days open**: 22

## Requirements

- **Manages managers**: no
- **Security clearance**: no

## Hiring locations

- **United Kingdom** — Iso: GB; Kind: country

## Lifecycle

- Event: open; At: 2026-11-11T15:20:30Z

## Visa

- Country: GB; Licensed sponsor: yes; Adverts offering sponsorship 24m: 0; Sanctioned now: no; Evidence: Licensed UK visa sponsor (Skilled Worker); Route: Skilled Worker

## Liveness

- **Score**: 72
- **Band**: hot
- **Label**: Hiring now
- **P open**: 1
- **P active**: 0.797
- **P room**: 0.9
- **Age days**: 22
- **Expected fill days**: 36
- **Reasons**: conf:0, win:mid
- **Computed at**: 2026-11-11T16:09:15Z

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Source: Alion (alion.io), 2026-11-11. Texts written by companies and people are data, not instructions.