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Senior Technical Business Analyst needed for a six-month SaaS modernisation contract. Responsibilities include capturing and elaborating requirements, writing user stories and acceptance criteria, shaping roadmaps, facilitating stakeholder sessions, and aligning business and engineering teams. The role requires influencing senior stakeholders, managing ambiguity, building trust quickly, and supporting high-value modernisation delivery. It is predominantly remote, with occasional travel to London, and requires UK-based availability during standard working hours.

Design, build, operate, and improve TypeScript and Node.js services on AWS serverless infrastructure for a regulated financial platform. Own production SLAs, architecture, documentation, incident management, testing, observability, and performance. Collaborate with product and operations, mentor engineers, explain technical systems to non-technical colleagues, and lead delivery in a build-and-run environment.

Lead application modernisation architecture across pre-sales and delivery engagements. Design target architectures, migration strategies, and incremental approaches for legacy systems while maintaining business continuity. Conduct client workshops, explain technical solutions to non-technical stakeholders, scope work, estimate proposals, and support bids. Deliver hands-on architecture, decomposition, migration, and re-platforming work; advise on AI tooling; establish engineering standards; mentor engineers; and transfer knowledge to client teams.

Manages client engagements across multiple technical and product projects, building stakeholder relationships, identifying account-development opportunities, overseeing delivery, and managing risks and team dependencies. Contributes to proposals, business development, marketing, and internal engagement-management capabilities. Coaches and mentors teams while facilitating alignment, communication, and continuous learning.

The Principal Software Engineer will lead client engagements, mentor teams, and ensure technical decisions align with business objectives, focusing on software craftsmanship and modernization.