Full Stack Developer

Blackrainbow; Remote; GBP 45,000 - 65,000; Full time

Job summary

A growing tech company in the UK is seeking a talented Full Stack Developer. This role involves working within an agile team to design, develop, and maintain features for their platform. The ideal candidate will have over 5 years of experience in software development and strong skills in C#, ASP.NET Core, and JavaScript. This position offers competitive compensation and remote working options.

Benefits

Competitive salary

Fully remote

Flexible working hours

Twenty-five days annual leave

Pension

Private health care

Training support

Regular company meetups

Qualifications

• 5+ years as a software developer with demonstrable experience.
• Knowledge of event-based architecture desirable.
• Excellent written and verbal communication skills.

Responsibilities

• Develop high-quality production-ready code with documentation.
• Collaborate with teams to ensure project objectives are met.
• Functionally test developed code to a high standard.

Skills

C#

ASP.NET Core

JavaScript

Microsoft SQL

KnockoutJS

jQuery

Azure DevOps

Unit Testing

Git

Education

Bachelor’s degree in a relevant technical field

Job description

Location: UK (remote)

Employment Type: Full time

Position: Full Stack Developer

Minimum Experience: 5+ years of working as a software developer with demonstrable experience

Compensation: Competitive

Summary

BlackRainbow is seeking a talented Full Stack Developer to join our growing team. The ideal candidate will collaborate within an agile team to design, develop, and maintain features for our NIMBUS platform. This includes working across the full stack to deliver secure, scalable, and high‑performing solutions that meet evolving business needs.

Who We Are

BlackRainbow was founded to address the inefficiencies in investigation case management experienced by investigators across law enforcement, government, and corporate at an enterprise level. Our flagship product, NIMBUS, is rapidly becoming the global standard for innovative case management solutions. With over two decades of experience supporting investigators and analysts in more than forty countries, we understand the unique challenges of both public and private sector investigations and build solutions that meet their evolving needs.

What We Are Looking For

The Full Stack Developer will play a key role in delivering high‑quality, production‑ready code, complete with thorough documentation and unit tests. You’ll collaborate closely with cross‑functional teams to ensure features are well‑planned, efficiently implemented, and aligned with project goals.

Our ideal candidate is confident across all stages of the software development lifecycle and brings strong experience in ASP.NET Core MVC, JavaScript, and Microsoft SQL development. Familiarity with Azure platforms and services is highly desirable. Experience working within or alongside law enforcement is also valuable. Existing UK SC & NPPV3 vetting is an advantage.

Key Responsibilities

• Support ongoing development of our key product in Asp.Net Core MVC, C#, KnockoutJS and jQuery.
• Create code which must be maintainable, extensible, robust and performant.
• Own and drive development tasks that you are involved in, participating and supporting your agile development Scrum team – in particular, peer‑reviewing and testing other developers’ code and documenting your own changes.
• Propose solutions that improve the quality, performance and maintainability of our browser‑based product.
• Functionally test all developed code to a high standard to enable QA to test efficiently.
• Participate in project meetings to ensure that front‑end concerns are fully understood and considered before delivery takes place.
• Interact with product management to develop a strong understanding of the project and its objectives.
• Follow the internal coding and documentation standards.
• Suggest improvements to our software development lifecycle process.
• Actively participate in scrum events; refinement, planning, stand‑ups, peer‑reviews and retros.
• Work collaboratively with other departments including sales, support and professional services.
• Be self‑motivated to continually learn and understand the latest industry innovations and technology.
• Mentor and assist other members of your Scrum team.

Requirements

• Eligible to work in the UK.
• Access to stable high‑speed broadband (>100 Mb download and >20 Mb upload) – this role is a remote working position.
• 5+ years of working as a software developer with demonstrable experience of C#, .NET Core, DI, KnockoutJS, HTML5, CSS3 / LESS, jQuery.
• Experience of event‑based architecture desirable. Ideally RabbitMQ and Azure Service Bus.
• Experience of unit testing technologies and patterns, with a preference of xUnit.
• Good MS SQL skills – can write efficient queries, analyse execution plans, maintain dacpac projects.
• Experience in version control systems, ideally Git.
• Experience of working in an Agile environment; comfortable working in a constantly changing work environment where speed and agility need to be balanced with quality and compliance.
• Experience of Azure DevOps (or similar).
• Excellent written and verbal communication.
• You must be a team player.
• Ability to work as part of a self‑directed team, determining your tasks daily in coordination with co‑workers.
• Bachelor’s degree in a relevant technical field or equivalent experience.

Why Join BlackRainbow?

BlackRainbow is ambitious, driven and deeply cares about the ability to make a difference to people’s lives with our software. Be a part of our team as we scale up.

Some of Our Benefits

• Competitive salary.
• Fully remote.
• Flexible working hours.
• Twenty‑five days annual leave (in addition to public holidays).
• Pension.
• Private health care which includes family members.
• Training support.
• Regular company meetups.