Cornspring is a high-growth start-up revolutionizing Family Office Services. Using our unique combination of innovative technology and data management excellence, we are building a cutting-edge AI-powered platform that integrates financial data, automates insights, delivers across web and excel-based applications and provides unparalleled insights and efficiency to Family Offices.

We specialize in generative AI (Gen-AI) and large language models (LLMs), offering Family Offices, Asset Owners, and UHNW clients a smarter, more efficient way to manage their financial data. Security, scalability, and innovation are at the core of what we do.

As a Senior Software Engineer, you will play a key role in designing and maintaining our cloud-native architecture, building scalable Python APIs, and shaping the future of AI-driven financial data solutions.

We pride ourselves on fostering a collaborative work environment where we prize creativity, excellence in engineering, a powerful focus and attention to problem-solving through great design.

For this position we require 2/3 days per week onsite in the Central London office.

What you will do:

•  Own & develop backend services in Python and AWS, supporting our Web and Excel-based applications, with a focus on serverless solutions and infrastructure as code
•  Architect & optimize AWS serverless infrastructure for scalability and security.
•  Lead technical initiatives, collaborating with design & product teams to shape innovative AI-powered features.
•  Implement CI/CD pipelines, monitoring, and security best practices.
•  Optimize data processing workflows, ensuring performance across all services.
•  Mentor & support junior developers, fostering best practices in code quality and system design.

Essential Skills & Experience:

•  4+ years of experience in Python backend development.
•  2+ years working with AWS services (Lambda, API Gateway, S3, CloudFormation, Aurora/PostgreSQL, etc.).
• Strong expertise in serverless architectures & Infrastructure as Code (IaC).
• Experience deploying and scaling containerized applications.
• Hands-on experience with CI/CD pipelines, GitHub, and Agile environments.
• Ability to own solutions end-to-end in a fast-paced start-up environment.

Bonus Skills (Nice-to-Have, But Not Required):

• Familiarity with AWS Bedrock and working with LLMs & Gen-AI solutions.
• Security-focused mindset, understanding IAM, encryption, and data privacy best practices.
• Strong problem-solving skills with a mathematical or algorithmic background.
• Prior experience in financial technology, financial data management, or data-heavy applications.

•  Build AI-powered financial data solutions that redefine an industry.
•  Work in a fast-moving startup where your ideas have a direct impact.
•  Hybrid work flexibility – 2/3 days in Central London, with remote options.
•  Competitive salary & benefits package.
•  Ownership & growth – opportunity to take leadership roles as we scale.
•  Challenging, high-impact work with a small, agile, and highly talented team.