Jack helps you find life-changing roles at companies like Delfa

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Delfa

Website

London

Billions of people still suffer from every-day diseases.

One key reason? Clinical trials are broken.

Despite $120 billion spent each year, most trials are delayed due to bottlenecks like patient recruitment.

Delfa is fixing this with autonomous AI agents. We're building AI agents to automate clinical trials, starting with patient recruitment.

Just three months in and already we’re:

Live on 30+ trials across multiple conditions

Mid-six-figure revenue and rising

300 % MoM product growth

$3.8 m seed from tier-one AI investors Air Street Capital

Industry: Healthcare

Open roles at Delfa

Talk to Jack and he’ll help you get considered for the roles below, or anything else that fits what you’re looking for.

AI Agent Operations Specialist

London, United KingdomNot Disclosed

AI Agent Operations Specialist at Delfa.ai in London, UK. Design and optimize autonomous AI agents that interact with real patients, alongside foundation model experts and medical doctors. This ground-floor role offers direct impact in health-tech with backing from tier-one AI investors and fast growth.

Posted 5d ago

How Jack & Jill work together

I get to know what you’re great at, then find roles you’d never find yourself.I get to know what you’re great at, then find roles you’d never find yourself.

I recruit from Jack’s network and make the intro when I spot a great match.I recruit from Jack’s network and make the intro when I spot a great match.

Learn about Jack

Everything you need
to land your next job

New matches

just now

Principal Engineer

93%

Payments Infra · Remote · $320–400k

High-reliability systems

Head of Engineering

96%

Series B Healthtech · London · £160–220k

Scaling eng orgs 10–40

Engineering Lead

91%

AI Safety · SF · $300–380k

ML infra + team leadership

Staff Engineer

94%

Frontend Platform · Remote · $280–350k

Next.js + edge infra

Senior Backend Engineer

98%

Digital Banking · London · £130–180k

Distributed systems + fintech

Job Search On Autopilot

Jack gets to know you through a conversation and searches 15 million jobs daily. You tell Jack yes or no, and he gets smarter about what you’re looking for with each response.

0:00

Jack

Tell me about a technical migration you led under time pressure.

0:02

I led a six-week migration of 40 services in three phases. We aligned stakeholders early and shipped two days ahead with zero downtime.

Confidence score

Strong: Clear structure, specific metrics

Improve: Add stakeholder conflict detail

Mock Interviews

Run a mock interview with Jack and get specific feedback on your stories, clarity, and answers to the hard questions. You’ll walk in with a tighter narrative and fewer surprises.

Salary Benchmark

Market 50th$155k

Your target$105k

Market 90th$220k

Base

$155k

Equity

$40k

Bonus

$15k

Based on Senior Engineer roles in London, Series A-B startups.

Salary Benchmarking

Jack shows you what ‘good’ looks like for your role, level, and location based on thousands of real jobs to inform your negotiation.

0:00

Jack

I’ve been a senior engineer for 3 years. Should I push for Staff or move into management?

That’s the right question to ask at this stage.

Let’s compare both paths: compensation, day-to-day work, and long-term fit.

First, what energised you more this year: technical problem-solving or people leadership?

Career Clarity Coaching

Jack helps you get clear on what you want next, what you’re great at, and what kind of work will actually fulfil you. In one coaching call, you’ll shape your career plan with Jack’s help.

0:00

Jack

Call Ended0:00

Employer

“We can offer $128,000 base salary.”

Jack

Below P50. Counter at $148k: they’ve run 4 rounds, they won’t walk.

You said

$148,000

Accepted

+$20,000

Salary Negotiation Coaching

Jack helps you build a negotiation plan with data and specific language you can use. Know when to push, what to ask for, and how to respond without damaging the relationship.

Introduction

Jack made an introduction

Marcus, CTO at Acme, wants to chat about the Founding Engineer role. He liked your distributed systems experience.

Founding Engineer$180–240kLondon

Accept Introduction

Skipped applicationDirect to CTO2 day process

Introductions to Hiring Managers

When Jack finds a match in Jill’s network, he introduces you directly to the hiring manager. No applications. No waiting. Warm introductions to people who already want to meet you.

The numbers.

230K

Professionals working with Jack

15M

Jobs scanned every day

30hrs

Saved on average vs traditional job searching

Jack helps you find life-changing roles at companies like Delfa