Senior Full Stack Developer, Firehills Technology Limited

Contractor, 3 Month Initial Contract

£75-100k

£500p/d, 3-4 days p/w with potential to extend at the same rate

SQL

TypeScript

Python

GraphQL

Postgres

Next.js

Senior and Expert level

Remote from UK

More information about location

Strategic Advisory Firm

Posted today

Strategic Advisory Firm

1-20 employees

B2BArtificial IntelligenceConsultingBusiness IntelligenceStrategic Intelligence

Posted today

£75-100k

£500p/d, 3-4 days p/w with potential to extend at the same rate

SQL

TypeScript

Python

GraphQL

Postgres

Next.js

Senior and Expert level

Remote from UK

More information about location

1-20 employees

B2BArtificial IntelligenceConsultingBusiness IntelligenceStrategic Intelligence

Company mission

Unlocking economic growth and impact, with a different perspective

Job

Company

Role

Who you are

10+ years of experience as a full stack developer
Senior experience shipping across a modern web frontend and a Python backend. TypeScript and Python are the main languages here
Experience building with large language models in the critical path — orchestration (custom scripts/loops), prompting, and handling the failure modes — not only calling an API
Strong SQL, and comfort with relational data and data pipelines. Postgres in our case
You build with AI coding agents day to day, and you have views about where they fail
Clear written communication
The right to work in the UK

Desirable

Entity resolution, record linkage or deduplication at real scale
Evaluating AI output properly — golden datasets, setting eval standards, regression testing
Having been the senior engineer in a small team, without a safety net
Genuine interest in how markets and organisations work

What the job involves

1. Own how Furze understands markets:
Own the pipeline that discovers the organisations in a market and the relationships between them
Improve the hard core underneath it: deciding when two records are the same organisation, which version of the truth survives over time, and how confident we should be in either
Build the views that turn the result into market intelligence somebody can actually use
Own the lane end to end. You will be the person who holds it
2. Build across the platform:
Work across the stack — the web application people use, and the services behind it
Pick up new areas of the roadmap as they come: using AI to assess against our proprietary role framework, classifying organisations by the role they play in a market, and more
Make architectural decisions, and be able to defend them
3. Make the quality provable
Build and extend how we evaluate what the AI produces — datasets, judges, scoring, regression testing
Work with subject-matter experts to test whether the output is genuinely any good, not just plausible
Calibrate across models and providers as they change, which they do constantly
Tell us when the quality isn’t there. Especially then

Application process

Apply via WTTJ
30 minute call with the Team
Real world skill test
Final interview stage with FH Directors

Our take

Strategy consulting is the most prestigious corner of a professional services industry worth hundreds of billions, yet how the advice actually gets made has barely changed in decades. The global strategy segment alone is worth roughly $55 billion and growing steadily, but clients increasingly grumble that expensive strategies look impressive on paper and then fail to stick.

Launched in 2023, Firehills is a UK firm betting it can change that by pairing systems thinking with AI. Rather than reaching for off-the-shelf frameworks, it models organisations as interconnected systems to surface the less obvious routes to growth. Its founders bring over fifty years of combined experience advising FTSE-100 companies, government and private equity, and the firm is building its own technology to turn analysis around in weeks rather than months.

Its ambition stretches beyond commercial returns toward social impact, helping government create lasting public value. As a lean newcomer, Firehills has to prove that approach against deeply entrenched global firms and convert early case studies into a durable track record. Do that, and it has a real chance to carve out a genuinely distinctive niche.

Freddie

Company Specialist at Welcome to the Jungle

Company

Company values

To challenge conventional thinking - Alternative perspectives reveal untapped capabilities and opportunities
We see the whole system - Growth emerges from understanding how organizations, markets, and stakeholders interconnect, and how the system will evolve
We make complexity actionable - Using the right frameworks we reveal clear strategic options, with clear pathways for execution, avoiding complicated solutions

Company HQ

Bamburgh, UK

Leadership

Matt Crosby

(Founder & Director)

Matt setup Firehills in 2023 to create growth and impact. Namely how to drive the best strategy, how to structure organisations effectively and put the best team in front of that strategy.

Rob Read

(Director)

Rob leads technology development and hiring at Firehills and owner of the Product Roadmap for our AI platform - Furze.

Chris Davis

(Director)

Chris is our leaders in all things public sector, delivering strategy projects for central government.

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