Senior Software Engineer (CSI)

Ebury is a global fintech firm dedicated to empowering businesses to expand internationally through tailored and forward-thinking financial solutions. Since our founding in 2009, we’ve grown to a diverse team of over 1,700 professionals across 40+ offices and 29+ markets worldwide. Joining Ebury means becoming part of a collaborative and innovative environment where your contributions are valued. You’ll play a key role in shaping the future of cross-border finance, while advancing your own career in a dynamic, high-growth industry.

Senior Software Engineer (CSI)

London Office - Hybrid: 4 days in the office, 1 day working from home

The Financial Crime Technology team is seeking an experienced and passionate Senior Software Engineer to play a crucial part in developing our next-generation, AI-powered platform designed to transform financial crime investigation. You will have a unique opportunity to build intelligent tools from the ground up while also supporting the existing systems that are critical to our business operations. We are looking for an engineer who thrives on tackling complex problems and is excited by the prospect of working at the intersection of AI, finance, and software engineering. You'll be a key contributor to a distributed team, helping us deliver the best possible experience for our analysts and protect our financial ecosystem.

Responsibilities:

• Contribute to the architecture and development of our new AI-powered services, utilizing Microservices and Domain-Driven Design (DDD) principles.
• Take ownership of existing, business-critical systems, ensuring their stability while proactively identifying opportunities for improvement, refactoring, and automation.
• Design, build, and maintain robust Python backend services using frameworks like FastAPI and Django.
• Develop and enhance the user-facing React application with TypeScript, focusing on building intuitive and responsive real-time interfaces for interacting with AI agents.
• Integrate and fine-tune large language models (LLMs) and other generative AI technologies to perform complex research, reasoning, and summarization tasks.
• Contribute to our CI/CD pipelines, utilizing GitHub Actions and Terraform for new services while supporting existing Jenkins pipelines.
• Embrace our "You build it, you own it" philosophy by taking full ownership of the products you create, from initial design and development to ongoing maintenance and support.
• Coach and mentor other engineers on the team, helping to foster a culture of technical excellence.

About You:

• You have extensive experience in developing complex, scalable software systems. While our primary language is Python, we value strong object-oriented programming fundamentals.
• You have strong hands-on experience with modern frontend development, particularly React and TypeScript, with a deep understanding of hooks and state management.
• You have significant experience building and deploying applications on cloud platforms, especially AWS.
• You are adept at building distributed systems and have hands-on experience with asynchronous communication patterns using technologies like AWS SNS/SQS, Kafka, or similar messaging queues.
• You are not afraid of legacy code. You see the challenge of keeping existing systems running and making incremental improvements as a core part of engineering.
• Quality is central to your work. You write clean, maintainable, and testable code, with a strong belief in the importance of unit and integration tests.
• You have a strong ability to communicate ideas clearly and concisely in English, essential for collaborating with our distributed team.

Nice to Have:

• Hands-on experience with Generative AI concepts like Retrieval-Augmented Generation (RAG), stateful agents, and prompt engineering.
• Experience with AI frameworks like LangChain/LangGraph or similar.
• Familiarity with vector databases and embedding models.
• Experience in the FinTech or RegTech (Regulatory Technology) domains.

About Us

Ebury is a FinTech success story, positioned among the fastest-growing international companies in its sector.

Founded in 2009, we are headquartered in London and have more than 1700 staff with a presence in more than 29 markets worldwide. Cultural diversity is part of what makes Ebury a special place to be. From Sao Paulo to Dubai, Vancouver to Auckland, we enjoy sharing team experiences and celebrating success across the Ebury family.

Hard work pays off: in 2019, Ebury received a £350 million investment from Banco Santander and has won internationally recognised awards including Financial Times: 1000 Europe's Fastest-Growing Companies.

None of this would have been possible without our proudest achievement: our great people. Enthusiastic, innovative and collaborative teams, always ready to disrupt and revolutionise the fast-paced FinTech sector. 

At Ebury, we’re committed to building a workplace where everyone feels valued, supported, and empowered to thrive. We’re proud to have active employee networks and ESG initiatives that reflect our inclusive culture, including our Women’s Network, LGBTQIA+ Network, and Veterans Network. These communities provide spaces for connection, mentorship, advocacy, and collaboration across our global teams.

We believe in inclusion. We stand against discrimination in all forms and have no tolerance for the intolerance of differences that makes us a modern and successful organisation. At Ebury, you can be whoever you want to be and still feel a sense of belonging no matter your story because we want you and your uniqueness to help write our future.

Please submit your application on the careers website directly, uploading your CV / resume in English.