Senior Software Architect Developer

Source Group International; Greater London; Hybrid; GBP 68,000 - 108,000; Full time

Benefits offered by this job

Hybrid work model

Mentoring programme

Health and fitness subsidies

Enhanced maternity and paternity?

Mental health training

Access to trained support colleagues

Job summary

Source Group International in London is seeking an Architect & Senior Developer to lead architecture across trading, clearing, and post-trade systems within the Investor Services business. The role combines hands-on development with strategic oversight in a hybrid London setting.

Expect extensive experience in .NET/C#, SQL Server, Kafka/IBM MQ, Azure, and regulatory frameworks (EMIR, MiFID II, CASS). You’ll mentor teams, drive DevSecOps, and shape data and security for regulated workloads.

Qualifications

• 10+ years of experience, including 3+ years in a senior architecture role.
• Expertise in .NET, C#, and SQL Server; React.js and Python desirable.
• Deep domain knowledge of financial markets technology and regulatory frameworks.
• Proven experience designing systems for listed derivatives, securities, and/or FX processing.
• Strong understanding of order processing, execution, risk management, collateral and valuation.

Responsibilities

• Oversee architecture across trading, clearing, and post-trade systems with CCPs and exchanges.
• Modernise integration patterns and reinforce security principles.
• Steer data architecture strategy including quality, ownership and security.
• Chair architecture governance forums and drive timely decisions.
• Produce architecture docs, decision records and audit-ready artefacts.
• Design resilient systems meeting RTO/RPO and FCA resilience obligations.
• Ensure regulatory obligations by design (EMIR, MiFID II, DORA, etc.).
• Mentor engineering teams on architecture, cloud-native patterns and best practices.
• Drive DevSecOps adoption and IaC; govern AI usage for secure, explainable solutions.

Skills

Experience in architecture

Financial markets knowledge

Communication skills

Regulatory frameworks knowledge

Domain knowledge of listed derivatives

Education

Degree in Computer Science or related field

Tools

.NET

C#

SQL Server

React

Python

Kafka

IBM MQ

Azure

Job description

Salary: £68,000 - 108,000 per year

Requirements:

• We are looking for a degree in Computer Science or a related field, though this is preferred rather than essential.
• We require 10+ years of experience, including 3+ years in a senior architecture role.
• We need expertise in .NET, C#, and SQL Server; React.js and Python are desirable.
• We need deep domain knowledge of financial markets technology, such as FCM, clearing brokers, investment banks, exchanges, or vendors.
• We require proven experience designing systems for listed derivatives, securities, and/or FX processing.
• We need strong understanding of order processing, execution, risk management, margining, collateral, valuation, and give-up processing.
• We require strong knowledge of FIX protocol and CCP/vendor connectivity, such as ICE Clearing, Eurex, LME, or CME.
• We need extensive experience with event-driven architectures, Kafka and/or IBM MQ, and real-time data pipelines.
• We require knowledge of regulatory frameworks including EMIR, MiFID II, CASS, MAR, DORA, and CFTC.
• We need microservices, containerisation, and cloud architecture expertise, preferably Azure, for regulated workloads.
• We require excellent communication skills and the ability to present to both C-suite and technical stakeholders.

Responsibilities:

• We oversee architecture across trading, clearing, and post-trade systems, including integrations with CCPs, exchanges, data/platform vendors, and customers.
• We direct the modernisation of integration patterns and frameworks, reinforcing strong security principles and practices.
• We steer our data architecture strategy, including data quality, ownership, security, and accessibility.
• We chair architecture governance forums and drive timely, effective architectural decisions.
• We produce architecture documentation, architectural decision records, target-state blueprints, and audit-ready artefacts.
• We design resilient systems that meet RTO/RPO requirements and FCA operational resilience obligations.
• We ensure regulatory obligations are met by design, including FCA/ESMA EMIR, MiFID II, DORA, and other relevant global obligations.
• We contribute to change management and incident management frameworks.
• We mentor and upskill engineering teams on architecture principles, cloud-native patterns, and best practice.
• We drive adoption of DevSecOps and infrastructure-as-code, and support governance of AI usage to ensure secure, explainable, and compliant solutions.

Technologies:

• AI
• Architect
• Azure
• C#
• Cloud
• DevSecOps
• IBM
• Incident Management
• Support
• Kafka
• Python
• React
• SQL
• Security
• microservices
• ASP.NET

More:

We are hiring an Architect & Senior Developer for our Investor Services business in the City of London. This is a hybrid role offering a salary of up to UK 120,000 within the financial services sector. The role offers challenging work, short decision-making processes, and high personal responsibility, along with flexible working. We also offer continuous learning, inclusion networks, a structured mentoring programme, attractive remuneration with social benefits including subsidised health and fitness, enhanced maternity and paternity support, mental health training, and access to trained support colleagues.