At a Glance
- Tasks: Lead the design of our cutting-edge analytics platform and solve complex real-world problems.
- Company: Join Cassini, a leading provider of analytics tools for the derivatives industry.
- Benefits: Competitive salary, flexible working options, and opportunities for professional growth.
- Other info: Dynamic team environment with a focus on innovation and collaboration.
- Why this job: Shape the future of analytics technology and make a global impact.
- Qualifications: Proven experience in senior technical roles and strong problem-solving skills.
The predicted salary is between 36000 - 60000 £ per year.
We are seeking a Principal Engineer (Platform Architecture) to help lead the design and evolution of our market‑leading analytics platform, shaping technical direction while solving complex, real‑world problems at scale.
About us
Founded in 2014, Cassini is the established, core utility provider of analytics and optimization tools for the derivatives industry. Trusted by hedge funds, asset managers, and banks worldwide, our platform delivers real‑time, front‑to‑back insight into the full cost of derivatives trading. Our award‑winning platform empowers clients to reduce margin, optimize collateral, and enhance their liquidity risk framework, delivering real‑time, front‑to‑back analytics on the full cost of derivatives trading.
What sets us apart?
- Recognised as ‘Best Derivatives Tech Provider’ and ‘Analytics Leader’
- Global impact with a rapidly expanding footprint
- Analytics provider to the largest asset managers in the world
- Enterprise‑grade security (ISO 27001 & SOC‑2)
- Seamless integration with OMS, EMS, and collateral systems
Role
In this role, you will ensure we build the right things, the right way. You will report to the Head of Technology.
Core Responsibilities
- Own and govern technical design and architecture across multiple development teams, defining standards, reviewing solution designs, and ensuring alignment with the broader platform vision
- Provide hands‑on architectural leadership, guiding complex design decisions and supporting teams through critical implementations and production challenges
- Partner closely with senior stakeholders to balance technical strategy, delivery needs, and long‑term platform health
- Champion the adoption of agentic and AI‑native workflows, embedding them in the core engineering lifecycle
- Act as a primary technical point of contact for both internal and external stakeholders
- Identify and proactively address technical debt, risk, and cross‑team dependencies, influencing roadmap planning and long‑term platform health
- Mentor senior developers and tech leads, raising the overall architectural and engineering bar across the organisation
- Ensure non‑functional requirements (performance, scalability, security, and resilience) are embedded from the outset
Tech Stack
We work with a modern stack designed for scale, reliability, and developer productivity. You don’t need to be an expert in every tool listed below, but you should have strong experience with most of them or equivalent technologies.
Core Languages & Frameworks
- Python (Flask, SQLAlchemy, NumPy, Pandas) for services and analytics
- React, Typescript, Redux for the front end
Cloud & Infrastructure
- AWS (ECS, Lambda, RDS, S3)
- Docker
- Linux
Data, Messaging & Caching
- MySQL
- RabbitMQ
- Redis
Tooling & DevOps
- GitLab for source control and CI/CD
AI & Automation
- AI Agents & Assistants used to enhance analytics, internal tooling, and developer productivity
Required Qualifications & Experience
- University degree in a STEM subject from a reputable institution
- Proven experience in a senior technical role such as Principal Engineer, Technical Architect, or equivalent position working with complex analytical system design
- Track record of owning, shaping and governing architecture across multiple teams and large‑scale platforms
- Experience working with modern distributed and cloud‑based systems
- Familiarity with our tech stack or equivalent technologies
Skills & Competencies
- Excellent architectural judgement, with the ability to balance short‑term delivery needs against long‑term technical strategy
- Strong problem‑solving skills, particularly in complex, ambiguous, or high‑impact technical scenarios
- Ability to communicate complex technical concepts clearly to both technical and non‑technical stakeholders
- Ability to influence and drive technical direction and architectural decisions at a senior level
- Collaborative mindset, with the ability to work effectively across teams and senior stakeholder groups
- Pragmatic and outcome‑focused, with a strong sense of ownership and accountability
Principal Engineer (Platform Architecture) employer: Cassini Systems
At Cassini, we pride ourselves on being an exceptional employer in the financial services sector, offering a dynamic work environment that fosters collaboration and innovation. Our London-based team enjoys a culture of continuous learning, with ample opportunities for professional growth and development, while working on cutting-edge technology that shapes the future of liquidity risk management. With a strong focus on employee empowerment and a commitment to excellence, we ensure that our staff are not only challenged but also supported in reaching their full potential.
StudySmarter Expert Advice🤫
We think this is how you could land Principal Engineer (Platform Architecture)
✨Tip Number 1
Network like a pro! Reach out to folks in your industry on LinkedIn or at meetups. A personal connection can often get your foot in the door faster than any application.
✨Tip Number 2
Show off your skills! Create a portfolio or GitHub repository showcasing your projects and contributions. This gives potential employers a taste of what you can do beyond your CV.
✨Tip Number 3
Prepare for interviews by practising common technical questions and scenarios related to platform architecture. We recommend doing mock interviews with friends or using online platforms to boost your confidence.
✨Tip Number 4
Don’t forget to apply through our website! It’s the best way to ensure your application gets seen by the right people. Plus, it shows you’re genuinely interested in joining our team.
We think you need these skills to ace Principal Engineer (Platform Architecture)
Some tips for your application 🫡
Tailor Your CV:Make sure your CV reflects the skills and experiences that align with the Principal Engineer role. Highlight your experience with complex analytical systems and any relevant technologies from our tech stack.
Craft a Compelling Cover Letter:Use your cover letter to tell us why you're passionate about platform architecture and how your background makes you a great fit. Share specific examples of how you've tackled complex design challenges in the past.
Showcase Your Problem-Solving Skills:In your application, emphasise your problem-solving abilities, especially in high-impact scenarios. We want to see how you've navigated ambiguity and made architectural decisions that benefited your previous teams.
Apply Through Our Website:We encourage you to apply directly through our website. It’s the best way for us to receive your application and ensures you’re considered for the role. Plus, it shows your enthusiasm for joining our team!
How to prepare for a job interview at Cassini Systems
✨Know Your Tech Stack
Familiarise yourself with the technologies mentioned in the job description, especially Python, AWS, and Docker. Be ready to discuss your experience with these tools and how you've used them in past projects. This shows you’re not just a fit for the role but also genuinely interested in their tech.
✨Showcase Your Architectural Judgement
Prepare examples that highlight your architectural decision-making skills. Think of scenarios where you balanced short-term needs with long-term strategy. This will demonstrate your ability to think critically and strategically, which is crucial for a Principal Engineer.
✨Communicate Clearly
Practice explaining complex technical concepts in simple terms. You’ll likely need to communicate with both technical and non-technical stakeholders, so being able to bridge that gap is key. Consider doing mock interviews with friends or colleagues to refine this skill.
✨Emphasise Collaboration
Be ready to discuss how you’ve worked with cross-functional teams in the past. Highlight your collaborative mindset and provide examples of how you’ve influenced technical direction while working closely with others. This will show that you can thrive in their team-oriented environment.
