Job Description

Hybrid requirements: 3 days per week in the office.

Senior Full Stack Engineer

(2x Roles -- Frontend-Focused & Backend-Focused)

Location:

London (Hybrid - 3 days/week in office)

Type:

Full-time
We're hiring two exceptional Senior Software Engineers to help shape the future of our client's platform. Both roles are full stack, but one has a stronger emphasis on frontend development, while the other leans more heavily on backend systems.
You'll play a key role in building intuitive, scalable, and high-performing features across our product. Whether your strength is in crafting elegant UI experiences or architecting robust backend systems, we're looking for engineers who thrive in cross-functional teams and love owning features end-to-end.

What You'll Do

Deliver impactful features across the stack, with a focus aligned to your expertise (frontend or backend).
Own systems from architecture and implementation to deployment and ongoing improvement.
Collaborate closely with design, product, and customer teams to translate ideas into polished user experiences.
Contribute to the evolution of our technical direction, engineering practices, and product strategy.
Participate in the full development lifecycle: planning, coding, reviewing, launching, and iterating.

What We're Looking For

5+ years' experience building and shipping full stack applications.
For the frontend-focused role: Deep experience with React and TypeScript, strong UI/UX sensibilities, and a portfolio that showcases your frontend work.
For the backend-focused role: Strong experience building scalable APIs and backend systems, ideally using Python (or a willingness to learn it).
Solid understanding of cloud infrastructure (AWS, GCP, or Azure).
Comfortable working in fast-paced, collaborative environments.
Bonus: Experience in a high-growth startup, familiarity with testing tools (e.g., Playwright, Storybook), and serverless architecture.

Tech Stack

Frontend: React, TypeScript, Playwright, Storybook
Backend: Python, FastAPI, Postgres, TypeScript
Cloud: AWS (Lambda, DynamoDB, EKS, etc.)
DevOps & Tooling: GitHub Actions, Terraform, Docker
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Role tech stack
Python


React


TypeScript


AWS


Life at
Haystack
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Culture overview
We've built the Haystack team on a foundation of solid values and ethics. Our environment is relaxed and enthusiastic; informal and methodical; anti-corporate and highly driven.
Our people have a curiosity for all things tech and are driven by making an impact each day. The Haystack team all bring their own personality and creativity into the dynamic of our company.
We're enthusiastic and ambitious as hell. The only thing flat about us is our company structure. We give everyone responsibility and don't waste time and energy on micromanagement.
Tech recruitment is stuck in the dark ages. But it doesn't need to be. The reality of today is that techies hold all the cards. It's time for a better way to do things.
Besides our impressive array of freshly watered office plants, we provide generous holidays, social events and all the digital equipment that you need to excel in your role.
A combination of decades of experience in recruitment, a strong foundation in technology and our enthusiastic, ambitious nature creates an environment rife for success.
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Employee benefits
Bonus Scheme
Flexible Hours
Flexible Working
Free Food
Free Parking
Laptop
Pension
Sabbatical Leave
Office vibe
BEER FRIDGE
CITY CENTRE
FRIDAY DRINKS
HACKATHONS
OFFICE DOG
OPEN PLAN
SOCIAL EVENTS
Location
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Tech at
Haystack
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Leadership
Mike Davies
Co-founder
Tech overview
We're on a mission to connect the world's tech talent with employers that matter to them and underpinning that mission is our product. The Haystack app has been built for techies, by techies and we're passionate about delivering high-quality features that our users actually want to use. As part of the tech team, you'll have a direct impact on both the Haystack App and the Haystack Employer Dashboard and will have exposure to the full end-to-end solution.
Our core tech stack is made up of React Native, TypeScript, AWS, MongoDB plus a few others and we use Figma to design and prototype. We're constantly on the lookout for great product people, that love to get stuck into a tech challenge and value autonomy.
Sound interesting? Join our talent pool and we'll keep you in the loop with any new opportunities.
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Engineering principles
AGILE PROCESS
CODE REVIEWS
COLLECTIVE CODE OWNERSHIP
COMMUNICATION AND COLLABORATION
CONTINUOUS DELIVERY
CONTINUOUS DEVELOPMENT
CONTINUOUS INTEGRATION
OPEN SOURCE CONTRIBUTOR
RAPID RELEASE CYCLES
REFACTORING
SCRUM
UNIT TESTING
Company tech stack
Adobe Illustrator


Adobe XD


Android


CSS 3


D3.js


Docker


.Net Core


Figma


Git


GraphQL


HTML5


iOS


JavaScript


Kanban


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