Full Stack Engineer
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Haystack
Full Stack Engineer
£75,000 - £90,000
Cambridge
Hybrid
Graduate
Junior
Mid
Senior
Leader
Description
Hybrid requirements: This role has flexible working patterns.

About the Company Our SaaS client is looking to expand its engineering team, bringing someone on to act as a 'Founding Engineer' alongside the CTO and Engineering Lead to further build out their business offering. With a solid technical foundation and a rapidly growing customer base, the business is entering an exciting phase of scale and product expansion. They’ve recently signed a major customer, unlocking new resources to grow the team and evolve the platform. The product has earned a strong reputation for reliability, performance, and user experience. Customers rely heavily on it and are highly engaged, often acting as product advocates. About the Role As a Full-Stack Engineer, you’ll work closely with a small, experienced team including the CTO and other senior engineers. The role will be very hands-on and offer a lot of variety, due to the busy and changing nature of small businesses. You'll be deeply involved in: - Back-end systems, web apps, and core infrastructure - Scaling and optimising a cloud-based platform - Collaborating with customer-facing teams to respond quickly to user needs - Designing and developing new features and capabilities - Shaping the future of the engineering team and its culture - This is a high-impact, high-autonomy role. You’ll take ownership of projects from concept to delivery, contribute to architectural decisions, and help evolve operational processes. The Company Tech Stack - Primary languages: Go, C# - Frontend: Svelte - Infrastructure: Kubernetes, GCP, AWS, PostgreSQL - Other tools: Temporal What They’re Looking For - 10+ years of commercial software engineering experience - Experience in Go and a willingness to learn unfamiliar languages. - Experience operating and scaling complex cloud-based systems - Strong computer science fundamentals (through studies or commercial experience) - A balance of pragmatism and quality when building software - Comfortable working in Linux-based environments - Familiarity with AI-assisted development tools - Customer-focused mindset - Someone whose excited about joining a growing business and collaborating with all areas of the business Why Join? - Be part of a fast-growing, stable company at a pivotal stage - Work with experienced, pragmatic, and friendly colleagues - High degree of ownership and influence - Flexible, hybrid work environment (remote also considered!) - Career growth in a founding-style team setting Benefits - Generous salary - Equity - Bonus scheme - Flexible working hours/ set-up - Automonmy and career progression

Role tech stack
Culture overview
At Haystack we work like the product we build – fast, transparent and signal-driven. We trust people to own their work and give them the space to ship without red tape. Ideas win on merit, not job titles. We’re remote-friendly but tightly connected, using daily async stand-ups and quick calls when it matters. Feedback flows openly, experiments happen daily, and learning is built into the job. Everyone here cares about craft – whether that’s clean code, crisp design or clear communication – and we back each other to keep raising the bar. We celebrate wins, own mistakes and move on quickly. If you like autonomy, impact and a team that genuinely roots for each other, you’ll feel at home at Haystack.
Employee benefits
Flexible Hours
Flexible Working
Free Parking
Laptop
Learning Allowance
Learning/Development days
Office vibe
Beer Fridge
City Centre
Free Coffee
Social Events
Team Building Days
Location
Leadership
Mike DaviesCo-founder
Tech overview
Haystack is a real-time marketplace connecting 150k+ tech professionals with teams they actually want to join. Our AI-driven matching crunches millions of data points to surface the right people in seconds, while Verified Candidates come pre-screened and interview-ready with 80% shortlist rates. Behind the scenes we run a live, event-driven platform built with TypeScript/Node, React, GraphQL, MongoDB and AWS—shipping fast with vector search, embeddings and microservices powering instant alerts and 24–48h interview booking. If you love distributed systems, data pipelines and building products people genuinely want to use, this is the place to do it.
Engineering principles
Agile Process
Code Reviews
Continuous delivery
Continuous Development
Mentoring
Rapid release cycles
Scrum
Unit testing
Company tech stack
Haystack
Full Stack Engineer£75,000 - £90,000
This role has expired