Senior Backend Engineer

This role is with one of Dex's trusted partner companies. We work closely with their teams to truly understand their culture, goals, and what they're looking for, so we can match you with the right opportunity and give you context about the role before you commit to a process. If you're interested sign up to Dex to apply. Dex is an AI recruiter agent that helps you run your job search. Tell Dex your stack, seniority, and what you want to build. We will manage your applications and surface other opportunities that are a fit. The role This company builds an AI workspace for sensitive financial data, serving some of the world's largest regulated institutions. Think workloads where SOC 2, GDPR, and FCA compliance aren't just buzzwords, but fundamental to the product. They've secured significant Series A funding from leading investors and are scaling fast. You'll join a lean, senior backend team, reporting directly to the founders, at the intersection of AI and finance. This is a staff-track IC seat with visible influence, architecting core services and data pipelines. It's for an engineer who wants to own critical systems end-to-end, not just maintain a small component of a larger platform. The work Architect and build scalable backend services and APIs for an AI workspace handling sensitive financial data.Design and implement high-performance data pipelines to process large-scale financial datasets with strict accuracy and latency requirements.Optimise database schemas, queries, and indexing strategies for PostgreSQL in a high-throughput, distributed environment.Partner with ML engineers to productionise models, integrating them seamlessly into robust backend systems.Lead technical design reviews, mentor engineers, and contribute to shaping the engineering culture as the platform scales. What You Bring 7+ years of backend engineering experience, with a track record of building and scaling production systems.Expert-level Python, modern web frameworks (FastAPI), and deep expertise in PostgreSQL query optimisation and scaling.Experience with event-driven architectures, message brokers (e.g., Celery, Kafka), and designing clean REST APIs and microservices.Strong fundamentals in distributed systems, cloud platforms (Azure preferred), Docker/Kubernetes, and security (authn/authz, encryption).Experience shipping software in regulated environments (SOC 2, GDPR, FCA) is a significant advantage. Why apply through Dex This is a rare, high-impact role at a rapidly scaling AI fintech, often hard to find or oversubscribed through traditional channels. Apply through Dex to cut through the noise, get a full brief on the company and role before you interview, and explore other similar opportunities tailored to your profile. Skip the cold application process and get a direct line to the hiring team. If you're interested, sign up to Dex to apply - https://jobs.meetdex.ai/jobs/b084256b-08f5-401e-b55c-ee6f1bd1ce67 As part of the recruitment process at Dex, we process your personal data in accordance with our Privacy Notice for Job Applicants. This notice explains how and why your data is collected and used, and how you can contact us if you have any concerns.