Principal .NET Developer - Capital Markets at Capco

<p data-pm-slice="1 1 []"><strong>Principal .NET Developer – Capital Markets</strong></p> <p>Location: London (Hybrid) | Practice Area: Technology &amp; Engineering | Type: Permanent</p> <p><strong>Engineer high-performance platforms that drive capital markets innovation</strong></p> <p><strong>The Role</strong></p> <p>As a Principal .NET Developer at Capco, you’ll architect and lead the delivery of enterprise-scale platforms for our global capital markets clients. Leveraging modern cloud technologies and a deep understanding of financial products and processes, you’ll deliver scalable, secure, and high-performing applications. You’ll also play a leadership role in mentoring engineering teams and supporting Capco’s broader technical capability.</p> <p><strong>What You’ll Do</strong></p> <ul data-spread="false"> <li> <p>Design and build enterprise-grade .NET solutions for capital markets platforms</p> </li> <li> <p>Implement scalable, event-driven systems using modern cloud-native architectures</p> </li> <li> <p>Apply engineering best practices including SOLID principles, TDD, and CI/CD pipelines</p> </li> <li> <p>Collaborate with stakeholders and mentor teams to ensure project success</p> </li> <li> <p>Lead platform architecture discussions, focusing on secure, maintainable solutions</p> </li> </ul> <p><strong>What We’re Looking For</strong></p> <ul data-spread="false"> <li> <p>Proficiency in C# (7.0/8.0) &amp; .NET with a background in building enterprise systems in capital markets</p> </li> <li> <p>Strong understanding of trade lifecycle processes and financial instruments (Options, Derivatives, Rates)</p> </li> <li> <p>Experience with SQL Server and/or NoSQL solutions; performance tuning and design</p> </li> <li> <p>Expertise in AWS (DocumentDB, EKS, EC2, S3, Aurora, CloudFront, Route 53)</p> </li> <li> <p>Experience with caching layers like Redis or Elasticache and scalable API design (REST/GraphQL)</p> </li> </ul> <p><strong>Bonus Points For</strong></p> <ul data-spread="false"> <li> <p>Passion for mentoring and contributing to the wider Capco engineering community</p> </li> <li> <p>Experience leading client engagements and supporting RFPs or technical pre-sales</p> </li> <li> <p>Familiarity with regulatory and compliance aspects in banking environments</p> </li> <li> <p>Knowledge of secure design standards and software development lifecycle best practices</p> </li> <li> <p>Strong communication skills to engage with business and technical stakeholders</p> </li> </ul> <p><strong>Why Join Capco</strong></p> <ul data-spread="false"> <li> <p>Deliver high-impact technology solutions for Tier 1 financial institutions</p> </li> <li> <p>Work in a collaborative, flat, and entrepreneurial consulting culture</p> </li> <li> <p>Access continuous learning, training, and industry certifications</p> </li> <li> <p>Be part of a team shaping the future of digital financial services</p> </li> <li> <p>Help shape the future of digital transformation across FS &amp; Energy.</p> </li> </ul> <p><strong>Benefits</strong>&nbsp;</p> <p><strong>We offer a competitive, people-first benefits package designed to support every aspect of your life:</strong></p> <ul> <li><strong>Core Benefits:&nbsp;</strong>Discretionary bonus, competitive pension, health insurance, life insurance and critical illness cover.<strong>&nbsp;</strong></li> </ul> <ul> <li><strong>Mental Health:&nbsp;</strong>Easy access to CareFirst, Unmind, Aviva consultations, and in-house first aiders.<strong>&nbsp;</strong></li> </ul> <ul> <li><strong>Family-Friendly:&nbsp;</strong>Maternity, adoption, shared parental leave, plus paid leave for sickness, pregnancy loss, fertility treatment, menopause, and bereavement.<strong>&nbsp;</strong></li> </ul> <ul> <li><strong>Family Care:&nbsp;</strong>8 complimentary backup care sessions for emergency childcare or elder care.&nbsp;</li> </ul> <ul> <li><strong>Holiday Flexibility:&nbsp;</strong>5 weeks of annual leave with the option to buy or sell holiday days based on your needs.<strong>&nbsp;</strong></li> </ul> <ul> <li><strong>Continuous Learning:&nbsp;&nbsp;</strong>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.<strong>&nbsp;</strong></li> </ul> <ul> <li><strong>Healthcare Access:&nbsp;</strong>Convenient online GP services.<strong>&nbsp;</strong></li> <li><strong>Extra Perks:&nbsp;</strong>Gympass(Wellhub), travel insurance, Tastecard, season ticket loans, Cycle to Work, and dental insurance.</li> </ul> <p><strong>Inclusion at Capco</strong> 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.</p> <p>#LI-DNI</p>