Principal Software Engineer, GPS
Scale AI · London, UK · GPS Engineering · listed November 5, 2026
The shape of it
Seniority
Principal
Experience asked
5–10 years
Where
Not stated
Requirements listed
7
Length
1,307 words
In the posting’s own words
We are hiring a Principal Engineer to join a small team of our most senior engineers who take on the problems no one else can. You will work at the earliest stage of our engagements: shaping the technical approach with clients, defining the technology we build on, and turning ideas into working prototypes fast. You will step in when a project is stuck or a problem is unusually hard, and turn what you learn in the field into shared capabilities every team can build on.
What it asks for · 7
- A strong engineering background, with a Bachelor’s degree in Computer Science, Mathematics or a related quantitative field (or equivalent practical experience)
- 10+ years of post-graduation engineering experience, with demonstrated proficiency in languages such as Python, TypeScript/JavaScript, Java, or C++
- 5+ years of experience applying AI/ML in production environments, such as building generative/agentic AI applications, RAG systems or evaluation pipelines
- Strong problem-solving skills, with a track record of taking ambiguous, early-stage problems from a blank page to a working prototype and into production
- Deep expertise in system design and architecture, including experience with cloud-based machine learning tools and platforms (e.g. AWS, GCP, Azure)
- Past experience in a forward deployed engineering role
- Experience building and deploying large-scale AI solutions
Also a plus
- Past experience in a forward deployed engineering role
- Experience working at a startup, particularly as a founding engineer
- Experience building and deploying large-scale AI solutions
- Experience delivering technology programs for governments or regulated industries
- Experience deploying solutions on-prem or in customer-controlled environments
- Current or previous UK government security clearance (e.g. SC or DV)
Degree language
- A strong engineering background, with a Bachelor’s degree in Computer Science, Mathematics or a related quantitative field (or equivalent practical experience)
Tools and skills named
Languages
- C++
- Java
- JavaScript
- Python
- TypeScript
Ways of working
- Mentorship2×
- Code review
- Cross-functional
Cloud & infra
- AWS
- Azure
- GCP
Models & research
- Machine learning2×
- LLM
Security & compliance
- Security
Words the posting leans on
- experience10×
- engineering7×
- clients6×
- engineer6×
- technical6×
- build5×
- problems5×
- public sector5×
- building4×
- engagements4×
- solutions4×
- systems4×
- technology4×
- bar3×
- core3×
- design3×
Counted from the posting after the mission statement and the legal notices are set aside. The ones near the top are the ones a screener is looking for.
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