Senior software engineer (Back-end)
Senior software engineer (Back-end)

Senior software engineer (Back-end)

London Full-Time 48000 - 84000 £ / year (est.) Home office (partial)
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At a Glance

  • Tasks: Design, build, and operate scalable software solutions using Typescript and Node.js.
  • Company: Seccl is an Octopus-owned investment platform transforming the industry with a B-Corp certified mission.
  • Benefits: Enjoy 27 days holiday, flexible working, private medical insurance, and a £750 learning budget.
  • Why this job: Join a culture of innovation, mentorship, and continuous improvement in a fast-growing tech environment.
  • Qualifications: Experience in a strongly typed language, cloud providers, and building high-quality APIs is essential.
  • Other info: Hybrid role based in London, Bath, or Edinburgh with opportunities for remote work.

The predicted salary is between 48000 - 84000 £ per year.

Hybrid role to be based in our London, Bath or Edinburgh office

About us

Seccl is the Octopus-owned embedded investment platform that’s on a mission to helping more people to invest – and invest well.

We’re B-Corp certified with an amazing product-market fit, impressive early traction and the potential to transform an outdated industry, for the better. We\’ve been growing fast and will scale even faster over the next few years.

We’re also proud to be part of Octopus, the £multi billion group that\’s on a mission to breathe new life into broken industries, through companies like Octopus Energy, Octopus Investments and Octopus Money.

Check out the Seccl website for the latest on our products and our mission to shape the future of investments.

Our culture

Never settle – We think of ourselves as ‘embedded hero-makers’ for our customers. We put them first, and if we say we’ll do something, we’ll move heaven and earth to do it. We think boldly and embrace change.

Take ownership – We think rigorously and deeply about a problem, but then charge at it, acting with and urgency and speed that sets us apart. But we never lose sight of quality or long-term scalability.

Be generous & candid – We encourage our people – and our customers – to challenge us and never shy away from tough conversations. We have a flat and inclusive culture where everyone can be themselves – and speak up.

Check out our Glassdoor page for the latest reviews or our LinkedIn for company updates and insights from the team.

Our engineering

  • Our product and engineering department is split into four tribes: Custody; Accounts; Customer Enablement; and Cloud. Each tribe is comprised of multiple teams, each owning a specific domain of the product. Each team will have a squad engineering manager, a product manager and 3-5 engineers with tailored skillsets to the specific domain.

  • Our current technology stack is AWS serverless products (Lambda , SQS , EventBridge , API Gateway , S3 ) running Typescript (and Node.js) on the compute layer and backed by MongoDB for the database layer. We have some C# services and are expanding out into other AWS products such as ECS Fargate . Our IAC is a mix of Serverless framework and Terraform . We use JIRA for project management, Github actions for our CI/CD pipelines and Incident.io for our incident management process.

  • For more detailed information, feel free to ask for our tech radar and engineering practices.

The role

The purpose of this role is to design, build and operate reliable and scalable software solutions, building new functionality using Typescript and Node.js. You play a key role in our software development and have a hands-on approach throughout the development process. As a senior member of the team, you are the ‘go-to’ person for queries.

On a typical day you will…

  • 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 more junior engineers.

  • Communicate with non-technical colleagues to answer queries about the Seccl system.

What you need…

  • To own your services from design to operation. We operate a build-and-run model where engineers have autonomy but full accountability.

  • Engineers are not passengers in their products but champions. Drive improvements and features while being comfortable to openly collaborate and investigate ideas and being challenged.

  • Have a strong ability to understand business requirements and turn this into efficient, scalable solutions. Desire to learn our business domain.

  • 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.

Nice to have…

  • Have experience with Node.js , specifically Typescript .

  • Have experience with Amazon Web Services .

  • Have experience with serverless products.

  • Have experience with document databases, specifically MongoDB .

  • Have experience mentoring/managing.

  • Have experience in a build-and-run model.

  • Have experience in a structured on-call process.

  • Previous experience working in regulated industries, particularly finance.

What’s in it for you…

We offer a generous mix of benefits for the things that really matter to our people, including:

27 days holiday + bank holidays (some can be flexible) + day off on your birthday + three days (full time) per year for Dependant leave

Two volunteering days per year

Length of service award – one month paid sabbatical at eight years

6% employer pension contribution, and life assurance

Private medical insurance with AXA Health

Enhanced Parental leave

MacBook and up to £500 home office set up budget

£750 per person learning budget

Option to work abroad for up to six weeks a year

Health and wellbeing initiatives including free therapy via Wellness Cloud, mental health support via Headspace

Strong financial wellbeing focus including access to Octopus Money , Octopus Share Incentive Plan and will writing offering via Octopus Legacy

Perkbox – Flexi-points giving you a range of discounts and perks including free weekly coffee, gym and retail discounts

Access to initiatives like Cycle to Work and Octopus Electric Vehicle Leasing

Interview 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, (following an initial chat with one of our Talent team):

  • First stage – one-hour System Design interview with two of our senior+ engineers

  • Second stage – one-hour TypeScript Code Review interview

  • Final stage – 45 mins bar-raiser culture-based interview

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.

Our aim is to build a diverse and inclusive company of awesome people, with unique skills, passions and experiences. All applicants will be considered for employment without attention to age, ethnicity, religion, sex, sexual orientation, gender identity, family or parental status, national origin, or veteran, neurodiversity or disability status.

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!

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Senior software engineer (Back-end) employer: Seccl

Seccl is an exceptional employer, offering a dynamic hybrid work environment in London, Bath, or Edinburgh, where innovation and collaboration thrive. With a strong focus on employee growth, generous benefits including 27 days of holiday, a learning budget, and health initiatives, Seccl fosters a culture of inclusivity and continuous improvement, empowering engineers to take ownership of their work while contributing to a mission that transforms the investment industry for the better.
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Contact Detail:

Seccl Recruiting Team

StudySmarter Expert Advice 🤫

We think this is how you could land Senior software engineer (Back-end)

Tip Number 1

Familiarise yourself with Seccl's mission and values. Understanding their commitment to transforming the investment industry will help you align your answers during interviews, showcasing how your personal values resonate with theirs.

Tip Number 2

Brush up on your knowledge of AWS and serverless architecture, particularly focusing on the technologies mentioned in the job description like Lambda and S3. Being able to discuss these in detail will demonstrate your technical expertise and readiness for the role.

Tip Number 3

Prepare to discuss your experience with distributed systems and debugging techniques. Since the role requires a strong understanding of observability, being able to share specific examples of how you've tackled these challenges will set you apart.

Tip Number 4

Engage with Seccl's online presence, such as their Glassdoor and LinkedIn pages. This will not only give you insights into their culture but also provide you with potential talking points during your interview, showing your genuine interest in the company.

We think you need these skills to ace Senior software engineer (Back-end)

Proficiency in TypeScript
Strong experience with Node.js
Understanding of AWS services, particularly serverless products
Experience with MongoDB and document databases
Ability to design and implement high-quality APIs
Knowledge of distributed systems and debugging techniques
Experience with Infrastructure as Code (IaC) tools like Terraform
Familiarity with CI/CD pipelines using GitHub Actions
Strong problem-solving skills
Ability to mentor and guide junior engineers
Excellent communication skills for non-technical stakeholders
Experience in a build-and-run model
Understanding of software testing, observability, and performance optimisation
Willingness to participate in on-call duties

Some tips for your application 🫡

Tailor Your CV: Make sure your CV highlights relevant experience in back-end development, particularly with Typescript and Node.js. Emphasise any work you've done with AWS and distributed systems, as these are key requirements for the role.

Craft a Compelling Cover Letter: In your cover letter, express your enthusiasm for Seccl's mission and culture. Mention specific projects or experiences that demonstrate your ability to design and operate scalable software solutions, and how you align with their values of ownership and continuous improvement.

Showcase Your Technical Skills: Include a section in your application that details your technical skills, especially those related to the job description. Highlight your experience with serverless products, MongoDB, and any mentoring roles you've had, as these will set you apart from other candidates.

Prepare for the Interview: Research common system design and TypeScript coding interview questions. Be ready to discuss your past projects and how they relate to the responsibilities outlined in the job description. Prepare thoughtful questions about the team and company culture to show your genuine interest.

How to prepare for a job interview at Seccl

Understand the Tech Stack

Familiarise yourself with Seccl's technology stack, including AWS serverless products, Typescript, Node.js, and MongoDB. Be prepared to discuss how your experience aligns with these technologies and how you can contribute to their projects.

Showcase Problem-Solving Skills

During the System Design interview, demonstrate your ability to think critically and design scalable solutions. Prepare examples of past projects where you tackled complex problems and explain your thought process clearly.

Prepare for Cultural Fit

Seccl values a flat and inclusive culture. Be ready to discuss how you embody their principles of ownership, candour, and continuous improvement. Think of examples where you've taken initiative or fostered collaboration in previous roles.

Ask Insightful Questions

Interviews are a two-way street, so come prepared with questions that show your interest in Seccl's mission and culture. Inquire about their approach to mentorship, team dynamics, and how they handle challenges in the fast-paced investment industry.

Senior software engineer (Back-end)
Seccl
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  • Senior software engineer (Back-end)

    London
    Full-Time
    48000 - 84000 £ / year (est.)

    Application deadline: 2027-08-18

  • S

    Seccl

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