Tech Lead - 3 month initial contract (Edinburgh)

We help organisations navigate the future of technology, combining human expertise, emerging tech and AI to deliver better outcomes, faster.
Since 2014, we’ve worked side-by-side with clients to solve complex challenges, build high-performing teams, and create lasting capability.
About you:
You care deeply about producing high-quality work that delivers real value
You’re comfortable navigating ambiguity and solving complex problems collaboratively
You bring strong expertise in your craft, alongside a willingness to keep learning
You communicate clearly and build trust quickly with clients and teammates
You’re pragmatic, adaptable and outcome-focused
You value low-ego collaboration and enjoy working as part of multidisciplinary teams
Requirements
What you’ll bring to the table:
Key Responsibilities
Platform Capacity & Scalability: Lead the initiative to prove and improve platform capacity and concurrency. Design solutions that allow our core systems to handle significant demand increases without service degradation.
Service Layer Modernization: Oversee the rebuild of core API services (Identity, Portfolio, ShareDealing) to move off unsupported .NET frameworks, ensuring security, maintainability, and improved performance.
Performance Engineering: Implement a repeatable performance testing capability. Identify and remediate bottlenecks in high-traffic customer journeys and establish proactive monitoring strategies.
API-First Integration Strategy: Drive the move from brittle, legacy file-based (SFTP) interfaces to robust, scalable API interfaces, prioritizing the “top 10” critical supplier integrations to reduce dependencies and improve real-time data flow.
Required Skills & Experience
Backend Engineering & .NET: Deep expertise in .NET architecture and backend systems. Experience in modernizing legacy frameworks while maintaining platform uptime is critical.
High-Concurrency Performance: Proven experience diagnosing and fixing performance issues in high-load, distributed systems. You understand how to eliminate bottlenecks in database-heavy applications.
API Design & Integration: Demonstrated success in designing and scaling robust API interfaces, specifically replacing legacy file-based/batch processing systems with real-time, resilient API solutions.
Technical Resilience: Practical experience implementing resilience patterns (e.g., caching, circuit breakers, rate limiting) to insulate services from vendor or downstream degradation.
Operational Mindset: Experience in establishing performance baselines and testing protocols that directly inform architectural decision-making.
Benefits
Equal Opportunities Statement
Diversity and inclusion are hugely important to us, and we’re committed to providing equal opportunities for all. We’re actively recruiting for a diverse and inclusive workforce so want to ensure we do everything we can to support your application.
We want you to feel safe and empowered to let us know if you need any adjustments to be made to your application or interview process, so please speak to our recruitment team.