Full stack Engineer, Ebury

• 5+ years of professional software engineering experience
• Strong Python Backend Expertise: Deep experience with FastAPI (or Django/Flask), asynchronous programming, clean architecture, and writing production-grade code
• Strong React & TypeScript Skills: Ability to architect non-trivial frontends with sound state management, performance optimization, and comprehensive testing
• System Design Judgment: A proven track record of designing scalable, maintainable systems and clearly articulating architectural trade-offs
• API & Integration Skills: Proficiency with REST, streaming (SSE/WebSockets), and the real-world complexities of stitching together messy upstream systems
• Data Proficiency: Strong SQL/NoSQL skills, query optimization, and data modeling
• Testing & Ownership Mindset: You treat testing as a core part of the development lifecycle and proactively drive features from ambiguous ideas to production
• Excellent Communication: Ability to explain technical decisions to both engineers and non-technical stakeholders, alongside a passion for writing useful documentation

Desirable

• Team: Flow (Core AI Infrastructure)
• Flow is our internal AI agent platform. This isn't a basic chatbot bolted onto a help center; it is core agentic infrastructure that reaches across our data warehouse, services, and central systems to execute complex work on behalf of the business. Flow powers both internal and client-facing workflows, delivering true automation and replacing traditional ticketing queues with instant, intelligent actions
• We are looking for a Senior Full-Stack Engineer to help us transition Flow from a fast-moving internal product to durable, productionized platform infrastructure
• You will own complex features end-to-end—including agent workflows, reasoning UIs, and cross-system integrations—while raising the engineering bar and shaping the technical direction of a small, autonomous team
• This role sits at the intersection of agentic AI and live operational workflows within a regulated fintech environment. The surface area is the entire company, and your impact will be visible within weeks
• Build Action-Oriented Agent Workflows: Design multi-step orchestration, tool use, and retrieval grounded in our data stores using the Strands Agents SDK
• Architect End-to-End Features: Own development across a React/TypeScript frontend and Python/FastAPI backend, balancing rapid iteration with platform maintainability
• Own the Reasoning Layer: Extend our Chain-of-Thought UI to ensure explainability. In a regulated environment, showing why an agent made a decision is a core feature, not a nicety
• Make Agents Measurably Reliable: Build and extend our evaluation harness (Ragas) and observability platform (Langfuse, with session continuity) so we ship changes based on evidence, not vibes
• Define Evaluation Strategies: Build custom evaluators, datasets, benchmarks, and automated regression suites to catch quality regressions before they hit production
• Integrate Systems & Clouds: Connect internal APIs, data warehouses, email, and cross-cloud GCP/AWS services with robust error handling and distributed tracing
• Industrialize Prototypes: Drive the discover → industrialize → productionize lifecycle, turning promising AI prototypes into hardened, daily-deployed services on CD pipelines
• Mentor & Lead: Uplift mid-level engineers through code reviews, pair programming, and establishing scalable engineering patterns
• Collaborate Cross-Functionally: Partner with Product, Ops, Trading, and Treasury to identify high-value workflows worth automating (and ruthlessly deprioritize the ones that aren't)
• The Tech Stack:
• Frontend:
• React, TypeScript
• Micro-frontend architecture
• Chain-of-Thought / Agent-reasoning UI
• Vite, Vitest
• Backend & AI:
• Python, FastAPI
• Strands Agents SDK (Agent Orchestration)
• AWS Bedrock
• RAG / Advanced Retrieval
• Ragas (Evaluation), Langfuse (LLM Observability)
• Infrastructure:
• AWS (ECS Fargate, Lambda, API Gateway, S3) with cross-cloud GCP integration
• Terraform, GitHub Actions
• Docker
• Event-driven integration patterns