Full Stack Software Developer

Aspire Software operates and manages wholly owned software companies, providing mission-critical solutions across multiple verticals. By implementing industry best practices, Aspire delivers a time sensitive integration process, and the operation of a decentralized model has allowed it to become a hub for creating rapid growth by reinvesting in its portfolio.

As a Full Stack Developer you ll design, build, and maintain features across the full stack from database and back-end services through to the front-end screens our customers use every day. You ll work within a collaborative, cross-functional team to solve real technical challenges and deliver improvements that thousands of grant managers rely on across the UK and beyond. We re a remote-first company, so you ll collaborate with teammates across locations and are trusted to do your best work wherever you re based. This is a hands-on development role for someone who s ready to take ownership of features and grow their skills quickly. You ll contribute to technical discussions, learn from experienced engineers, and help raise the quality of everything we ship. Just as importantly, this is an AI-native role. We expect you to use modern AI tooling to problem-solve and deliver faster every day, while also helping us build AI capabilities directly into the Flexigrant platform. If using AI to accelerate your work is already second nature to you, you ll fit right in.

Key responsibilities

• Design, develop, and maintain robust, scalable, and secure features across the full stack
• Write clean, efficient, well-documented code that adheres to best practices
• Use AI tooling as a core part of your daily workflow to problem-solve, write, review, and ship code faster
• Help build AI-powered features into the Flexigrant platform
• Contribute to technical discussions and architectural decisions within the team
• Take part in code reviews to maintain quality and share knowledge
• Debug and resolve issues across the application stack
• Work with the Product Owner and team to refine requirements and turn them into working software
• Participate in agile ceremonies sprint planning, daily stand-ups, and retrospectives
• Contribute to continuous improvement of our development processes and practices
• Help support and maintain the production environment
• Stay current with emerging technologies, with a particular focus on advances in AI

2+ years of professional software development experience building secure, scalable applications in a fast-paced Agile environment

Strong proficiency in C# / VB.NET and the .NET stack, including .NET Core and ASP.NET (MVC / Web API)

Solid front-end skills across HTML, CSS, JavaScript and TypeScript

Experience coding responsive web applications for a range of devices and browsers

Strong relational database skills, particularly MS SQL Server and T-SQL, including schema design, data modelling, and query optimisation

Good understanding of application architecture and software design principles (SOLID, DRY, object-oriented design)

Understanding of security best practices in software development

Knowledge of RESTful API design and implementation, and service-based architecture

Experience with cloud platforms, preferably Microsoft Azure

Experience with version control systems

Understanding of CI/CD pipelines and DevOps practices

Ability to write automated tests (unit, integration, etc.)

Experience using Claude Code and/or other AI coding tools (e.g. Cursor, GitHub Copilot) as part of day-to-day development

Experience using agentic AI software development lifecycles and workflows

Ability to translate requirements from meetings and conversations into user stories or technical specs

Working AI-Native

AI is central to how we build, not an afterthought. This role calls for someone who is AI-native: you already reach for AI to accelerate your work, and you re excited to help embed AI deeper into both our development process and our product. We ll explore your AI fluency in the interview, so be ready to talk through and show how you work.

What AI-native means to us:

• You use AI coding tools such as Claude Code, Cursor, or GitHub Copilot as a natural, daily part of how you write, review, test, and ship code
• You have experience with agentic AI software development lifecycles and workflows directing AI agents to plan, build, and iterate on real work, rather than using AI only for autocomplete or to answer one-off questions and queries
• You know how to prompt, steer, and critically review AI output, keeping quality and security high rather than blindly accepting suggestions
• You re keen to help design and build AI-powered features into the Flexigrant platform
• You stay on top of a fast-moving field, continually adopting new tools and techniques that make you and the team more effective

The bar here is high: we re looking for someone at least as AI-native as our strongest engineers, and ideally someone who can raise it further.

Personal Characteristics

• Strong problem-solving skills with attention to detail
• Excellent written and verbal communication, able to be clear, concise, and accurate with both technical and non-technical audiences
• Self-motivated, with the ability to work independently when needed
• Collaborative team player who thrives in cross-functional environments
• Genuine passion for learning and staying current with technology, especially AI
• Pragmatic approach to development, with a focus on delivering value
• Resilience and adaptability when facing technical challenges
• Customer-focused mindset that considers end-user impact

Desired Candidate Profile

• 2+ years of professional software development experience building secure, scalable applications in a fast-paced Agile environment

• Strong proficiency in C# / VB.NET and the .NET stack, including .NET Core and ASP.NET (MVC / Web API)

• Solid front-end skills across HTML, CSS, JavaScript and TypeScript

• Experience coding responsive web applications for a range of devices and browsers

• Strong relational database skills, particularly MS SQL Server and T-SQL, including schema design, data modelling, and query optimisation

• Good understanding of application architecture and software design principles (SOLID, DRY, object-oriented design)

• Understanding of security best practices in software development

• Knowledge of RESTful API design and implementation, and service-based architecture

• Experience with cloud platforms, preferably Microsoft Azure

• Experience with version control systems

• Understanding of CI/CD pipelines and DevOps practices

• Ability to write automated tests (unit, integration, etc.)

• Experience using Claude Code and/or other AI coding tools (e.g. Cursor, GitHub Copilot) as part of day-to-day development

• Experience using agentic AI software development lifecycles and workflows

• Ability to translate requirements from meetings and conversations into user stories or technical specs

• Working AI-Native: AI is central to how we build, not an afterthought. This role calls for someone who is AI-native: you already reach for AI to accelerate your work, and you re excited to help embed AI deeper into both our development process and our product. We ll explore your AI fluency in the interview, so be ready to talk through and show how you work.

• What AI-native means to us:

• You use AI coding tools such as Claude Code, Cursor, or GitHub Copilot as a natural, daily part of how you write, review, test, and ship code

• You have experience with agentic AI software development lifecycles and workflows directing AI agents to plan, build, and iterate on real work, rather than using AI only for autocomplete or to answer one-off questions and queries

• You know how to prompt, steer, and critically review AI output, keeping quality and security high rather than blindly accepting suggestions

• You re keen to help design and build AI-powered features into the Flexigrant platform

• You stay on top of a fast-moving field, continually adopting new tools and techniques that make you and the team more effective

• The bar here is high: we re looking for someone at least as AI-native as our strongest engineers, and ideally someone who can raise it further.

• Personal Characteristics

• Strong problem-solving skills with attention to detail

• Excellent written and verbal communication, able to be clear, concise, and accurate with both technical and non-technical audiences

• Self-motivated, with the ability to work independently when needed

• Collaborative team player who thrives in cross-functional environments

• Genuine passion for learning and staying current with technology, especially AI

• Pragmatic approach to development, with a focus on delivering value

• Resilience and adaptability when facing technical challenges

• Customer-focused mindset that considers end-user impact