Senior Software Engineer

EC1 Partners; Greater London; On-site; GBP 110,000 - 120,000; Full time

Benefits offered by this job

Equity

Discretionary bonus

Job summary

Capitolis in London is seeking a Senior Software Engineer to design and build scalable, secure Java-based solutions and drive architectural decisions across the P.O products. You will work with product managers and R&D to implement roadmap features using Spring Boot, Docker, and cloud services.

The ideal candidate has a strong computer science background, 8+ years in server-side development, and excellent English communication skills.

Qualifications

• B.Sc. degree in Computer Science, SW Engineering or equivalent (M.Sc. is an advantage).
• At least 8 years of experience in Java server-side development, including cloud services (AWS).
• Experience with C# and .NET.
• Experience building complex, large-scale software solutions from scratch to live production.
• Proficiency in Java stack: Spring Boot, Spring Data, JPA, Swagger, Maven, Kafka, PostgreSQL, Jenkins, Git, RESTful Services, Docker.

Responsibilities

• Design software according to agreed standards, architecture, and requirements.
• Plan and build high quality, scalable, and secure solutions.
• Work closely with team lead, team members and product managers in defining and implementing roadmap features.
• Contribute and drive technological and architectural decisions.
• Interface with various R&D groups, as well as support groups.

Skills

Java server-side development

AWS cloud services

C# and .NET

Large-scale software development

Java, Spring Boot, Spring Data, JPA, (

Education

B.Sc. in Computer Science or SW Engineering

M.Sc. advantage

Tools

Docker

Kafka

PostgreSQL

Jenkins

Git

Swagger

Maven

Spring Boot

RESTful Services

Job description

Senior Software Engineer – Capitolis

Portfolio Optimization Team

London, UK

We believe the financial markets can and should work for everyone. Capitolis is the technology company helping to create safer and more vibrant financial markets by unlocking capital constraints and enabling greater access to more diversified capital and investment opportunities. Rooted in advanced technology and deep financial expertise, Capitolis powers groundbreaking financial solutions that drive growth for global and regional banks – and institutional investors alike. Capitolis is backed by world class venture capital firms, including Canapi Ventures, 9Yards Capital, SVB Capital, Andreessen Horowitz (a16z), Index Ventures, Sequoia Capital, Spark Capital, and S Capital, as well as leading global banks such as Barclays, BNP Paribas, Citi, J.P. Morgan, Morgan Stanley, Standard Chartered, State Street and UBS.

Founded in 2017, our team brings decades of experience in launching successful startups, technology, and financial services. Capitolis was recognized on the Inc. 2024 Best in Business list in the Financial Services and Innovation & Technology categories, and honored for the third consecutive year in the 2025 Euromoney Foreign Exchange Awards. The company has been included on CNBC’s World's Top Fintech Companies list for the past three years, Deloitte’s Technology Fast 500 list in consecutive years and was named to Fast Company’s prestigious annual list of The World’s Most Innovative Companies for 2023. American Banker recognized Capitolis among the Best Places to Work in Fintech, and the company was named by Crain’s New York Business as one of New York City’s Best Places to Work in 2025 for the fourth consecutive year. For more information, please visit our website at www.capitolis.com or follow us on LinkedIn.

Senior Software Engineer Key Responsibilities

• Design software according to agreed standards, architecture, and requirements
• Plan and build high quality, scalable, and secure solutions
• Work closely with team lead, team members and product managers in defining and implementing roadmap features
• Contribute and drive technological and architectural decisions
• Interface with various R&D groups, as well as support groups

Who You Are

• B.Sc. degree in Computer Science, SW Engineering or equivalent (M.Sc. is an advantage)
• At least 8 years of experience in Java server-side development, including cloud services (preferably AWS)
• Experience with C# and .NET
• Experience in building complex, large-scale software solutions from scratch to live production
• Experience with Java, Spring Boot, Spring Data, JPA, Swagger, Maven, Kafka, PostgreSQL, Jenkins, GIT, RESTful Services, Docker
• Strong analytical skills
• Self-starter, fast learner, and great interpersonal skills
• Excellent English communication skills – spoken and written
• Financial affinity is an advantage
• A “Can-Do” mentality and mindset
• Can learn and work in a fast-paced, dynamic environment

Key Responsibilities

• Take active part in a team of developers working on Capitolis’ P.O products
• Design software according to agreed standards, architecture, and requirements
• Work closely with team lead, team members and product managers in defining and implementing roadmap features
• Contribute and drive technological and architectural decisions
• Interface with various R&D groups, as well as support groups
• Create high-quality responsive UI applications
• Apply web standards for accessibility, responsive design, and support for all browsers
• Sharing knowledge as well as leading correct technological processes
• Proven ability to work autonomously and drive tasks forward

The target annual base salary range for this position is £112,000 and is dependent on a variety of factors, including, but not limited to, job-related experience, qualifications, knowledge, and skills. In addition to base salary, the compensation package for this role includes an annual discretionary bonus and company equity. This role is also eligible to participate in company-sponsored benefits and perks.

Our Company Values

We operate with a clear set of values that guide us — our way of being, decisions, and actions. These values define who we are, and we are committed to all of them. These values are uniquely ours. If these values — all of them — speak to you, this is an amazing place, but we are not for everyone. Learn more about our Company Values here.

• We lead with purpose, while creating exceptional value
• We pursue big breakthroughs, responsibly
• We learn from the best and are unapologetically independent
• We are obsessed with the future and fanatical about executing today
• We play tough, with heart

Our People Attributes

Our People Attributes are characteristics that describe the DNA of Capitolis employees. They provide a consistent framework to hire, assess, and develop our team against. Learn more about our People Attributes on our careers page here.

• Super Smart: quality thinking and know what good looks like
• Badass: all in, get stuff done, and high standards
• Good Human: collaborative, open-minded, authentic and real, and pursue self- actualization