Senior Software Engineer

Who you are

• To own your services from design to operation. We operate a build-and-run model where engineers have autonomy but full accountability
• We care deeply about correctness, resilience and operational excellence because our systems underpin real customer investments
• Engineers are not passengers in their products but champions. Drive improvements and features while collaborating openly with product, operations and engineering colleagues, challenging ideas constructively and focusing on delivering the best outcomes for customers
• Have a strong ability to understand business and customer problems and turn them into efficient, scalable solutions. Be curious about how investment and custody products operate, and pragmatic in balancing customer value, operational correctness, engineering quality and long-term scalability
• Experience building financial systems with multi-region, multi-currency or trading-related complexity would be advantageous
• Experience in a strongly/statically typed language
• Have a strong understanding of designing, building, and running high-quality, standards-compliant workflow APIs, with a focus on testing, observability, and performance
• Have worked with a cloud provider (AWS/Azure/GCP). We use AWS
• Have worked with distributed systems and are comfortable debugging through tracing and observability
• Willing to be on-call for your services
• Strong commercial experience with Node.js, specifically TypeScript
• Experience with Amazon Web Services
• Experience with Serverless products
• Experience with document databases, ideally MongoDB
• Experience mentoring engineers
• Experience leading technical delivery in a build-and-run engineering model
• Experience in a structured on-call process and incident management
• Experience working in regulated industries, ideally financial services or FinTech
• If this sounds like your kind of thing, we encourage you to apply even if you don’t tick every box. We’d love to hear from you!

What the job involves

• Our Product and Engineering organisation is structured into four tribes: Custody, Accounts, Experience, and Cloud & Security. Each tribe contains multiple autonomous squads, with clear full ownership over specific product domains
• The squads are intentionally small and cross-functional, typically made up of an Engineering Manager, Product Manager, and 3–5 engineers with complementary skills aligned to the domain they own
• We operate in a build-and-run model, with teams responsible for the full software lifecycle, from architecture and delivery through to operational support and incident management
• Our core platform is built on AWS serverless technologies including Lambda, SQS, EventBridge, API Gateway, S3, and ECS. We primarily develop in TypeScript and Node.js, with MongoDB as our primary document database. We also have a small number of C# services and are continuing to evolve our platform architecture, including expanding our use of ECS Fargate
• Infrastructure is managed through a combination of Terraform and Serverless Framework. We use GitHub Actions for CI/CD and incident.io to support our incident management processes and operational workflows
• We care deeply about engineering quality, pragmatic architecture, and continuous improvement. If you’d like to go deeper, we’re happy to share more about our engineering practices and technology radar during the interview process
• As an engineer at Seccl you will design, build and operate reliable and scalable, testable and maintainable software solutions, building new functionalities and products using Typescript and Node.js
• You play a key role in our software development and have a hands-on approach throughout the development process supporting resilient financial workflow systems and regulated investment operations. As a senior member of the team, you are the ‘go-to’ person for queries
• Work collaboratively in a domain aligned cross-functional squad made up of engineers and product along with colleagues from customer-facing and operations teams
• Design, implement and operate your services within your domain
• Be accountable for the SLAs of your products and iterative improvements
• Maintain and extend documentation for your services
• Foster a culture of continuous improvement and technical excellence while understanding when “good enough for now” is appropriate
• Provide guidance and mentorship for other engineers
• Communicate with non-technical colleagues to answer queries about the Seccl system

The application process

• Interviewing is a two-way thing, and we want you to have the time and opportunity to get to know us, as much as we are getting to know you
• Our interviews are conversational, so come with questions and be curious. In general, you can expect the interview process to look a bit like this:
• Talent screen - 30 min intro call with our Talent partner or an Engineering manager
• Bar raiser - 40 min with two Engineering leaders
• Technical loop - 2h virtual technical assessment with 2 core components - system design and TypeScript code review with breaks between the stages. You will receive preparation materials for the round and more information on how to prepare
• ⏳ We’ll only close this role once we have enough applications for the next stage. Please submit your application as soon as possible to make sure you don’t miss out and you should expect to hear back from us within one to two weeks of applying

Benefits

• Flexible/hybrid working: We don’t prescribe when or how many days you come into the office. It’s what you deliver that’s important
• Events and socials: Twice-yearly all-company offsites, regular team socials and plenty of non-work activities – from gigs to sporting activities – to get stuck into
• Private medical: Access GP and other health and dental appointments work through private medical insurance
• Focus on mental health: Your wellbeing is more important than work. We offer free and confidential access to therapy if you need it
• Long-service award: A month’s fully-paid sabbatical when you’ve worked here for eight years (we’re part of Octopus, after all)
• The usual stuff: 27 days’ holiday (plus religious holidays and your birthday), Cycle2Work scheme and workplace pension