Senior Fullstack Engineer

Hook; Greater London; On-site; GBP 75,000 - 95,000; Full time

Benefits offered by this job

27 days holiday

Stock options

Private health insurance

Wellness allowance

Learning budget

Flexible working

Office in Liverpool Street

Job summary

Hook is seeking a talented full‑stack engineer in London to join our team. You will work across the stack, using React on the frontend and Python on the backend, and own meaningful parts of our product architecture to deliver real customer value.

You’ll collaborate with both technical and non‑technical colleagues, review code, design data schemas, and help scale a SaaS platform. We offer hybrid work, 27 days holiday, stock options, private health insurance, and a learning budget to grow with us.

Qualifications

• Experience delivering full-stack web apps using React and Python.
• Proven ability to design scalable backend APIs.
• Strong communication and collaboration across teams.

Responsibilities

• Design and implement product features with cross-functional colleagues.
• Develop across the stack (backend-focused) and write clean, tested code.
• Own significant parts of the product architecture and lead improvements.

Skills

Frontend development

Backend development

React

Python

Tools

Django

Flask

FastAPI

Job description

About Hook

We’re building the future of customer growth. At Hook, we use AI and Machine Learning to help businesses predict revenue with accuracy, drive customer loyalty, and capture massive value from their existing customers.

We’re a Series A company who ranked 33 out of 100 on the Sifted fastest growing startups and we have raised $multi-million in funding from some of the top investors in Europe and the US (e.g. Balderton Capital and Lightspeed) and have an enviable list of customers that we’re working with including some of the fastest growing companies in the world. We’re looking for ambitious people that want to be part of our meaningful vision of changing how businesses engage with their customers, and of building one of the world’s leading workplaces for great people along the way.

Responsibilities:

You will wear many hats in your engineering duties. Your day-to-day will include:

• Working in a team with technical and non-technical colleagues to design and build product features that add value to our customers

• Working across the stack (back-end focus) and writing clean, well-tested code

• Own significant parts of our product architecture and propose and lead new improvements

• Reviewing other software engineers code and provide structured feedback

• Designing our engineering processes and patterns to be the best for our team

• Monitoring system performance and ensure everything is up and running

• Designing our data schemas to suit the needs across the business

There’s a lot going on - you’ll be building a brand new category of SaaS product! The more you want to be involved, the more you will find there is to do and the more impact you will have on our joint success.

Requirements:

We're looking for an ambitious self-starter who wants to be part of an early-stage company full of amazing talent and with a global vision.

• Experience working on both frontend and backend development. We use React on the frontend side and Python on the back end

• Experience working in taking products through different development environments into Production

• Excellent communication skills, with the ability to effectively collaborate and convey ideas to diverse stakeholders

• The ability to pick up and use third party APIs and tools

• Experience working with Python on the backend with frameworks, such as Django, Flask or FastAPI

• Desirable: A good understanding of cloud technologies

Salary - £75,000-£95,000 (depending on experience)

Benefits

27 days holiday (option to buy and sell holiday) + bank holidays

Generous stock options

Private health insurance so you can get the best care you need

Flexible monthly wellness allowance that you can use monthly on things like gyms, yoga, mental health & healthy food

Annual learning & development budget for every employee

Flexible working - we’ll all come together three days a week but otherwise you can work from home or come into our awesome office in Liverpool Street

The best equipment for everyone to work with

Our founder and team are incredibly passionate about creating a company culture that is diverse, inclusive, productive and enjoyable for all our colleagues. As part of a growing start-up team, we expect a lot from you and will work hard to make sure you have everything you need to be at your best.

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