Haystack

Junior Full Stack Developer

  • LocationWinnersh, United Kingdom
  • Listed21/10/2026
  • Salarynot stated
  • FieldSoftware engineering

Average of 13 Full Stack Developer jobs in the United Kingdom we read: £5,675/mo · updated October 22. A market reference, not this job's salary.

About the job

Job Title: Junior Full Stack Developer

Reports To: Head of IT & Software Development

Location

On-site Winnersh Triangle office

Employment Type: Full-time

Focus: Primarily frontend, extending into backend (C#/.NET) as features require

We're looking for a junior developer to join our in-house software team working on Taskye, our bespoke Computer-Aided Facilities Management (CAFM) platform. You'll spend most of your time building front-end features, with the opportunity to pick up backend work as your skills grow and the roadmap demands it.

About Us

FISco Uk Ltd is a facilities management company delivering total FM services, hard services and soft services, through a network of third-party contractors, acting as the intermediary between clients and providers.

At the center of that operation is Taskye, our CAFM system, built and maintained entirely in-house rather than bought off the shelf. It's the tool our team, our clients, and our contractor network use every day, which means the software you ship has a direct, visible impact on how the business runs.

Key Responsibilities

  • Design, build, and maintain UI features across Taskye's Next.js/React frontend, working within our existing component library and coding standards
  • Extend or consume backend APIs (C#/.NET 8 microservices) when a feature calls for it
  • Write tests for any work you pick up
  • Work through Git and Azure DevOps and track work in Jira
  • Learn and follow Taskye's established architecture and conventions

Core Skills

Tech Stack & Essential Skills

  • TypeScript
  • React
  • Next.js
  • HTML & CSS
  • Git
  • C# and .NET 8
  • T-SQL

Tooling used across the team: Azure DevOps (source control and CI/CD), Azure (cloud hosting), Jira (ticketing).

Desirable / Nice-to-Have

  • Exposure to Flutter/Dart
  • Familiarity with Azure cloud services
  • Any experience with automated testing (Jest, React Testing Library, xUnit, or similar)
  • Experience in infrastructure-as-code (Bicep) or CI/CD pipelines
  • A relevant degree, bootcamp, or personal/university projects demonstrating your work

What We Offer

  • Hands-on mentoring from a small, experienced in-house development team
  • Real ownership of features in a live product used daily across the business
  • A structured path designed to help your skills grow
  • On-site, collaborative team environment
  • Onboarding into our established coding standards and architecture
  • 25 days annual leave per year
  • Company pension scheme

Job details

Company
Haystack
Level
Junior
Posted
20 October 2026
Advert site
linkedin.com

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