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- Tasks: Build tools and automation to enhance platform reliability and performance.
- Company: Established global fintech firm with a focus on innovation and growth.
- Benefits: Hybrid working, competitive salary, and strong career progression opportunities.
- Other info: Collaborative culture with opportunities for continuous improvement and learning.
- Why this job: Join a high-impact role tackling complex distributed systems in a dynamic environment.
- Qualifications: Strong Java experience, knowledge of distributed systems, and DevOps mindset required.
The predicted salary is between 70000 - 90000 £ per year.
A well-established global fintech business operating large-scale trading platforms across multiple asset classes including equities, leveraged products, futures, options, and digital assets. Their technology supports a significant international client base and processes high volumes of real-time trading activity every day.
They are continuing to invest heavily in engineering, platform resilience, and product growth, with a strong focus on modern systems, high standards, and sustainable delivery.
This is a senior engineering opportunity within a specialist Site Reliability Engineering team focused on performance, uptime, and operational excellence across a business-critical trading platform. The role combines software engineering with reliability engineering. You’ll be involved in designing and building internal tooling, improving observability, automating operations, supporting development teams, and helping ensure trading systems remain stable, scalable, and high performing.
It would suit someone who enjoys solving technical problems at scale and wants to work close to production systems where speed, resilience, and continuous improvement matter.
What you will do:
- Build tools, automation, and internal services that improve platform reliability
- Implement monitoring, telemetry, and observability standards across distributed systems
- Analyse performance across application, OS, and network layers to identify bottlenecks
- Help define and improve SLOs / SLAs for critical services
- Support engineering teams with architecture, scalability, and containerisation initiatives
- Lead or contribute to incident response and post-incident reviews
- Improve event-driven and messaging systems for resilience and throughput
- Drive infrastructure automation and engineering best practices
What you will need:
- Strong Java development experience in production environments
- Good understanding of JVM performance tuning and backend optimisation
- Experience with distributed systems and troubleshooting at scale
- Hands-on knowledge of containers / orchestration (Kubernetes, Nomad, or similar)
- Experience with messaging systems such as Kafka, ActiveMQ, or similar
- Understanding of observability, monitoring, and tracing concepts
- Strong DevOps / CI/CD mindset
- Background in financial services or other mission-critical environments is beneficial
- Strong communication skills and ability to work across teams
Why consider it:
- High-impact role supporting live trading systems
- Strong blend of software engineering and SRE work
- Complex distributed systems challenges
- Well-known fintech brand with strong career progression
- Hybrid working and strong overall package
Contact Ciara Clarke at Harrington Starr for a confidential discussion on this role.
Senior Software Engineer - C# - (Hybrid Remote) in London employer: Harrington Starr
Contact Detail:
Harrington Starr Recruiting Team
StudySmarter Expert Advice 🤫
We think this is how you could land Senior Software Engineer - C# - (Hybrid Remote) in London
✨Tip Number 1
Network like a pro! Reach out to your connections in the fintech space, especially those who work with trading platforms. A friendly chat can lead to insider info about job openings or even a referral.
✨Tip Number 2
Show off your skills! Create a portfolio showcasing your projects, especially those related to performance and reliability engineering. This will give potential employers a taste of what you can bring to their team.
✨Tip Number 3
Prepare for technical interviews by brushing up on your Java and SRE concepts. Practice coding challenges and system design questions that focus on scalability and performance – these are key in the fintech world!
✨Tip Number 4
Don’t forget to apply through our website! It’s the best way to ensure your application gets noticed. Plus, we love seeing candidates who are proactive about their job search.
We think you need these skills to ace Senior Software Engineer - C# - (Hybrid Remote) in London
Some tips for your application 🫡
Tailor Your CV: Make sure your CV reflects the skills and experiences that match the job description. Highlight your Java development experience and any work with distributed systems, as these are key for us.
Craft a Compelling Cover Letter: Use your cover letter to tell us why you're passionate about the role and how your background fits. Mention specific projects or achievements that showcase your problem-solving skills in high-pressure environments.
Showcase Your Technical Skills: Don’t shy away from detailing your technical expertise. Include your experience with containers, orchestration tools, and any relevant monitoring or observability tools you've used. We love seeing hands-on experience!
Apply Through Our Website: For the best chance of getting noticed, apply directly through our website. It helps us keep track of applications and ensures you’re considered for the role without any hiccups.
How to prepare for a job interview at Harrington Starr
✨Know Your Tech Inside Out
Make sure you brush up on your Java development skills, especially in production environments. Be ready to discuss JVM performance tuning and backend optimisation, as these are crucial for the role.
✨Showcase Your Problem-Solving Skills
Prepare examples of how you've tackled technical problems at scale. Think about specific instances where you've improved platform reliability or optimised distributed systems, as this will resonate well with the interviewers.
✨Familiarise Yourself with Tools and Technologies
Get comfortable with containers and orchestration tools like Kubernetes or Nomad. Also, be prepared to discuss your experience with messaging systems such as Kafka or ActiveMQ, as these are key components of the role.
✨Communicate Effectively
Strong communication skills are essential, so practice articulating your thoughts clearly. Be ready to explain complex concepts in a way that’s easy to understand, especially when discussing architecture and scalability with cross-functional teams.