Ready to land your next role?
Career coaching worth $300/hour, job matching across 15 million roles, direct introductions to hiring managers. Completely free.
No credit card required · See jobs in 10 minutes
Career coaching worth $300/hour, job matching across 15 million roles, direct introductions to hiring managers. Completely free.
No credit card required · See jobs in 10 minutes
FleekJack scans 15 million jobs daily and introduces you directly to hiring managers.
Join professionals today
Fleek is a global online marketplace specializing in wholesale second-hand fashion. The platform connects retailers and resellers with verified vintage wholesalers around the world, making it easier to source high-quality used clothing in bulk. Fleek addresses the fragmented and often offline supply chain of vintage apparel by providing a transparent, secure, and scalable solution for both buyers and sellers. Founded in 2021, Fleek serves thousands of resellers and retailers in over 70 countries, moving millions of vintage clothing items from a vast network of wholesale suppliers. The company is backed by prominent investors, including Y Combinator, and has raised significant funding to expand its market reach and technical capabilities.
Talk to Jack and he’ll help you get considered for the roles below, or anything else that fits what you’re looking for.
Join Fleek as a Full Stack AI Builder in London to ship production-grade agents for a global B2B marketplace. Work with the CTO to build FleekOS and automate the circular economy, owning agentic workflows that tackle real sustainability challenges.
Staff Backend Engineer for Fleek's Growth squad in Shoreditch, London, UK. Fleek is led by a former Google and Postmates engineering leader and is building a platform that scales to millions of unique items. The role offers architectural ownership and a chance to help shape the future of B2C marketplaces at scale.
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
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.
JackTell me about a technical migration you led under time pressure.
I led a six-week migration of 40 services in three phases. We aligned stakeholders early and shipped two days ahead with zero downtime.
Strong: Clear structure, specific metrics
Improve: Add stakeholder conflict detail
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
Base
$155k
Equity
$40k
Bonus
$15k
Based on Senior Engineer roles in London, Series A-B startups.
Jack shows you what ‘good’ looks like for your role, level, and location based on thousands of real jobs to inform your negotiation.
JackI’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?
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.
JackEmployer
“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
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.
Accept Introduction
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.
Professionals working with Jack
Jobs scanned every day
Saved on average vs traditional job searching
