Senior .NET Developer - Capital Markets

Senior .NET Developer – Capital Markets

Location: London (Hybrid) | Practice Area: Technology & Engineering | Type: Permanent

Deliver enterprise-grade .NET solutions across financial services landscapes

The Role

As a Senior .NET Developer at Capco, you will design and build high-performance platforms for leading financial services institutions. You’ll bring deep engineering expertise to cloud-based, event-driven applications that support banking, payments, and capital markets. Collaborating with stakeholders, you'll deliver scalable solutions using best-in-class technologies and contribute to Capco’s engineering community.

What You’ll Do

• Build modern .NET-based solutions across financial domains (banking, payments, wealth, capital markets)

• Implement secure, scalable systems using AWS and distributed architecture patterns

• Apply TDD and SOLID principles to create maintainable, high-performance applications

• Develop RESTful and GraphQL APIs integrated with cloud-native and legacy systems

• Work collaboratively with cross-functional teams and share engineering knowledge across Capco

What We’re Looking For

• Proficiency in C# (7.0/8.0) & .NET with enterprise software development experience 

• Strong understanding of trade lifecycle processes and financial instruments (Options, Derivatives, Rates)

• Strong database design skills using SQL Server or NoSQL technologies

• Cloud expertise with AWS (DocumentDB, EKS, EC2, S3, Aurora, CloudFront, Route 53)

• Familiarity with Redis, Elasticache, and secure API design (REST/GraphQL)

Bonus Points For

• Passion for innovation and contributing to thought leadership

• Experience coaching junior developers and supporting agile delivery

• Knowledge of financial regulations and compliance requirements

• Effective communicator with both technical and non-technical stakeholders

• Curiosity and drive to explore emerging technologies and solutions

Why Join Capco

• Deliver high-impact technology solutions for Tier 1 financial institutions

• Work in a collaborative, flat, and entrepreneurial consulting culture

• Access continuous learning, training, and industry certifications

• Be part of a team shaping the future of digital financial services

• Help shape the future of digital transformation across FS & Energy.

Benefits 

We offer a competitive, people-first benefits package designed to support every aspect of your life:

• Core Benefits: Discretionary bonus, competitive pension, health insurance, life insurance and critical illness cover. 

• Mental Health: Easy access to CareFirst, Unmind, Aviva consultations, and in-house first aiders. 

• Family-Friendly: Maternity, adoption, shared parental leave, plus paid leave for sickness, pregnancy loss, fertility treatment, menopause, and bereavement. 

• Family Care: 8 complimentary backup care sessions for emergency childcare or elder care. 

• Holiday Flexibility: 5 weeks of annual leave with the option to buy or sell holiday days based on your needs. 

• Continuous Learning:  Your growth, your way - minimum 40 hours of training annually. Take your pick; workshops, certifications, e-learning. Also, Business Coach assigned from Day One: Get one-on-one guidance to fast-track your goals and accelerate your development. 

• Healthcare Access: Convenient online GP services. 
• Extra Perks: Gympass(Wellhub), travel insurance, Tastecard, season ticket loans, Cycle to Work, and dental insurance.

Inclusion at Capco We’re committed to making our recruitment process accessible and straightforward for everyone. If you need any adjustments at any stage, just let us know – we’ll be happy to help. We value each person’s unique perspective and contribution. At Capco, we believe that being yourself is your greatest strength. Our #BeYourselfAtWork culture encourages individuality and collaboration – a mindset that shapes how we work with clients and each other every day. #LI-DNI