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4 principal full stack engineer jobs found

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principal full stack engineer
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£700 and up  (4)
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Outside Spy
Apr 28, 2026
6 Months or more
Principal Full Stack Engineer (React/.NET/Agentic AI) - 6 months contract at Nicoll Curtin Technology, United Kingdom, 6 Months, £900 per day
£900 per day
Outside Spy United Kingdom
UK | Fully Remote (UK-based) Staff/Principal Full Stack Engineer (Contract) 6 months | £900 per day (Outside IR35) High-growth Product Engineering Team Build and evolve a core CRM product used across the business We're supporting a product-led organisation that is rebuilding and modernising key areas of an existing CRM platform . This role suits an experienced contractor who enjoys working in brownfield environments , partnering closely with the business, and shaping how a product evolves rather than just delivering tickets. You'll operate as a senior, hands-on engineer within a growing engineering group, working closely with senior leadership to take the product from where it is today to where it needs to be next . The role This is a product-focused engineering position , not a pure delivery role: Rebuild and enhance existing CRM features within a live production system Work end-to-end across Front End and Back End systems Partner closely with...
Outside Spy
Apr 24, 2026
Duration not stated
Principal Full Stack Engineer - TypeScript, React, Node, Agentic Workflow (Claude Code), AWS, Forward Deployed, AI‑Native Engineering – OUTSIDE IR35 at Smart Sourcer, United Kingdom, £875-£900 per day
£875 - £900 per day
Outside Spy United Kingdom
Principal Full Stack Engineer – TypeScript, React, Node, Agentic Workflow (Claude Code), AWS, Forward Deployed, AI‑Native Engineering – OUTSIDE IR35 Reporting to the Director of Engineering, this is a genuinely outstanding contract opportunity for a rockstar Principal Engineer to lead the development of a greenfield SaaS product . We’re looking for a ‘best of breed’, deeply senior, technically hands‑on engineer who thrives in complex problem spaces and fast-moving start-up & scale-up environments. You’ll need a genuinely Product Centric mindset and approach twinned with experience of AI‑Native Engineering and Agentic Workflow . You’ll be embedded into a product squad, frequently working Forward Deployed ; sitting shoulder‑to‑shoulder with clients to understand their workflows, shape solutions in real time, and ship production-grade software that transforms how they operate. You’ll own outcomes end‑to‑end across the stack, setting the technical bar for...
Outside Spy
Apr 24, 2026
6 Months or more
Principal Full Stack Engineer - TypeScript, React, Node, Agentic Workflow (Claude Code) - OUTSIDE at Smart-Sourcer, Remote, 6 Months, £875-£900 per day
£875 - £900 per day
Outside Spy Remote (Remote , UK)
Principal Full Stack Engineer - TypeScript, React, Node, Agentic Workflow (Claude Code), AWS, Forward Deployed, AI-Native Engineering - OUTSIDE IR35 Reporting to the Director of Engineering, this is a genuinely outstanding contract opportunity for a rockstar Principal Engineer to lead the development of a greenfield SaaS product . We're looking for a best of breed', deeply senior, technically hands-on engineer who thrives in complex problem spaces and fast-moving start-up & scale-up environments. You'll need a genuinely Product Centric mindset and approach twinned with experience of AI-Native Engineering and Agentic Workflow . You'll be Embedded into a product squad, frequently working Forward Deployed ; sitting shoulder-to-shoulder with clients to understand their workflows, shape solutions in Real Time, and ship production-grade software that transforms how they operate. You'll own outcomes end-to-end across the stack, setting the technical bar for the...
Outside Spy
Apr 28, 2026
Duration not stated
Staff Full Stack Engineer - Contract at Nicoll Curtin, England, £900 per day
£900 per day
Outside Spy England, United Kingdom
UK | Fully Remote (UK-based) Staff/Principal Full Stack Engineer (Contract) 6 months | £900/day (Outside IR35) High-growth Product Engineering Team Build and evolve a core CRM product used across the business We're supporting a product-led organisation that is rebuilding and modernising key areas of an existing CRM platform. This role suits an experienced contractor who enjoys working in brownfield environments , partnering closely with the business, and shaping how a product evolves rather than just delivering tickets. You'll operate as a senior, hands-on engineer within a growing engineering group, working closely with senior leadership to take the product from where it is today to where it needs to be next. The role This is a product-focused engineering position, not a pure delivery role: Rebuild and enhance existing CRM features within a live production system Work end-to-end across Front End and Back End systems Partner closely with...
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