Senior Frontend Engineer: AI-Powered Fintech

Saturn; Greater London; Hybrid; GBP 90,000 - 120,000; Full time

Benefits offered by this job

Office gym

Dental insurance

Learning budget

Team bonuses & equity potential

Job summary

Saturn, a Series A fintech, is hiring a Senior Product Engineer to own adviser-facing work across web and mobile, shaping AI-assisted workflows and the underlying frontend platform. You will collaborate with product leaders, designers, and experts to move ambiguous problems toward shippable solutions while maintaining coherence across systems.

You will drive performance, accessibility and production quality, making trade-offs and guiding others through technical decisions in a fast-growing

Qualifications

• Shipping experience delivering customer-facing software in production.
• Strong TypeScript and modern web framework skills.
• Ability to own a substantial product area from ambiguity to adoption.
• Balance product judgment with technical feasibility and timelines.
• Comfort working with incomplete specifications and deadlines.
• Proven track record improving performance and accessibility.
• Experience delivering work over months at scale with design collaboration.
• Clear written communication documenting reasoning and decisions.

Responsibilities

• Own adviser-facing workflows end to end across web and mobile.
• Design interfaces for AI-assisted and agent-driven work.
• Contribute to shared frontend architecture and foundations.
• Connect structured client data with documents and recommendations.
• Work across frontend, backend and AI layers as needed.
• Ensure performance, accessibility and high-quality interactions.
• Iterate based on analytics, experiments and production feedback.
• Provide technical direction, code reviews and mentoring.

Skills

Shipping experience

Frontend depth

Full-stack capability

Product judgement

Decision-making with incomplete spec

Craft in production

Delivery at scale

Strong written communication

Job description

Saturn, a Series A fintech, is hiring a Senior Product Engineer to own adviser-facing work across web and mobile, shaping AI-assisted workflows and the underlying frontend platform. You will collaborate with product leaders, designers, and experts to move ambiguous problems toward shippable solutions while maintaining coherence across systems.

You will drive performance, accessibility and production quality, making trade-offs and guiding others through technical decisions in a fast-growing