Principal Software Engineer

Instil

Principal Software Engineer at Instil, shaping architecture and delivering high-quality software in production environments. Leading engineering teams while solving complex technical challenges across cloud infrastructures.

Posted 5/28/2026full-timeBelfast • 🇬🇧 United KingdomLeadWebsite

Tech Stack

Tools & technologies

AWSAzureCloudDistributed SystemsGoogle Cloud PlatformJavaPythonTypeScript

About the role

Key responsibilities & impact

Design and deliver robust, scalable software systems using technologies like Java, C#/.Net, TypeScript or Python.
Lead architectural decisions across services, platforms, and cloud-native systems
Build and guide the development of backend services, APIs, and event-driven systems
Work across AWS, Azure, or GCP to design reliable and secure cloud-based solutions
Apply agentic ways of working, using AI tools to support design, development, testing, and delivery
Help teams adopt effective patterns for integrating AI into engineering workflows and systems
Provide technical leadership to engineering teams, helping shape direction and unblock delivery
Contribute hands-on where needed, particularly in complex or high-impact areas of implementation
Drive improvements in engineering practices, system design, deployment processes, and operational maturity
Support teams with technical mentoring, design reviews, and problem-solving across the software lifecycle
Collaborate with platform, product, and delivery teams to ensure systems are scalable, maintainable, and production-ready
Help define technical standards and influence how engineering is done across projects and teams.

Requirements

What you’ll need

Strong experience designing and delivering production-grade software systems using technologies such as Java, C#/.Net, TypeScript or Python.
Significant experience working with cloud platforms such as AWS, Azure, or GCP
Strong background in system design, architecture, and building scalable distributed systems
Experience designing and building APIs, backend platforms, and event-driven services
Proven ability to make sound technical decisions and guide teams through complex engineering challenges
Comfortable working across the full software delivery lifecycle, from design through to deployment and operation
Strong grasp of software engineering fundamentals, patterns, and best practices
Experience adopting agentic ways of working, using AI tools to enhance engineering productivity and delivery
Ability to balance hands-on delivery with technical leadership and strategic thinking
Strong communication skills and the ability to work effectively with engineers, stakeholders, and cross-functional teams.

Benefits

Comp & perks

Recognition That Matters: A discretionary annual performance bonus that rewards your impact and contribution to our success.
Flexibility Built In: Flexible working arrangements and summer hours, because life isn’t 9 to 5, and balance matters.
Financial Security: A highly competitive pension scheme with generous employer contributions, private healthcare, and life assurance for peace of mind.
Health & Wellbeing: Employee Assistance Programme, mental health support, cycle-to-work scheme, and regular social events to keep our culture vibrant.
Time to Recharge: 35 days holiday, enhanced maternity pay, and family-first policies so you can focus on what matters most.
Learning Never Stops: From courses to certifications, we’ll invest in your development so you can keep growing and shaping what’s next.
Community & Culture: Opportunities to volunteer, give back, and be part of initiatives that make Instil a truly inclusive and connected workplace.

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

JavaC#.NetTypeScriptPythonAPI designbackend servicesevent-driven systemscloud architecturesystem design

Soft Skills

technical leadershipproblem-solvingcommunicationcollaborationstrategic thinkingmentoringdecision-makingengineering practicesadaptabilityinfluencing