Platform engineer

Seccl; Greater London; Hybrid; GBP 55,000 - 75,000; Full time

Benefits offered by this job

27 days holiday + bank holidays

Private medical insurance

MacBook + home office budget

Learning budget £750

Volunteer days

Pension 6%

Job summary

Seccl is seeking a Platform Engineer to shape and evolve the AWS-based cloud platform supporting its investment products. You will treat the cloud platform as a product, enabling squads to self-serve and scale services with a focus on reliability, security, and performance.

You will work in the Cloud Resilience team, primarily using AWS services such as Lambda, API Gateway, and DynamoDB-like stores, with Terraform for infrastructure as code and Datadog for observability.

Qualifications

• Experience with AWS cloud platforms and serverless architectures.
• Proficiency with JavaScript/TypeScript applications and DevOps tooling.
• Strong focus on observability, monitoring, and alerting.

Responsibilities

• Architecting, implementing, and maintaining scalable AWS infrastructure using Terraform.
• Designing cloud-native solutions with MongoDB, Lambda, API Gateway, and other AWS services.
• Contributing to incident response, production readiness, and reliability initiatives across engineering squads.
• Enhancing observability and platform insight with Datadog and alerting.
• Improving CI/CD processes with GitHub Actions, reducing delivery friction.
• Collaborating with Node.js/TypeScript engineers to ensure secure, performant apps.
• Mentoring engineers and promoting DevOps best practices across teams.

Skills

AWS

JavaScript/TypeScript

Serverless architectures

Observability mindset

Infrastructure as Code

Tools

Terraform

Docker

GitHub Actions

Datadog

MongoDB Atlas

API Gateway

Lambda

ECS

SQS

Aurora

Job description

Hybrid with travel to Bath, London and Edinburgh a couple times a month

About us

Seccl is the Octopus-owned embedded investment platform, on a mission to help more people invest, and invest well.

We’re building the infrastructure behind the next generation of investing. Our technology already powers some of the UK’s most ambitious fintechs, banks, financial advisers and wealth firms, with close to a million investors relying on Seccl-powered platforms. And we’re now expanding into Europe.

We’ve got a proven product, strong momentum and big ambitions for what comes next: helping more household-name brands launch and scale investment propositions, entering new markets and replacing outdated investment infrastructure with technology that’s faster, simpler and built for scale.

We’re proud to be part of Octopus, one of the UK’s most successful privately held investment and technology groups. That gives us the backing and long-term perspective to build something substantial, while keeping the pace and energy of a high-growth business. Seccl and Octopus are both B Corp certified and share a belief that profit and purpose should go hand in hand.

If you want to help shape the future of investing in the UK and across Europe, you’ll be in good company.

Check out the Seccl website to see what we’re building and read more about our mission to shape the future of investments.

The role

We're looking for a Platform engineer to shape and evolve the platform that underpins our investment products. You’ll be someone who loves understanding engineering problems and enabling teams to self-serve their needs. You view the cloud platform as a product, and engineering as your customer.

The role is within our Cloud Resilience team - a critical squad within our engineering organisation responsible for empowering squads to build and run their own services.

We’re primarily in AWS, utilising Lambda, ECS, SQS, EventBridge, API Gateway, Aurora, Redshift among others. Our main data store is MongoDB Atlas and our observability platform is Datadog. Our application is written in Typescript/NodeJS and our infrastructure is defined in Terraform.

On a typical day you will be…

• Architecting, implementing, and maintaining scalable, secure infrastructure in AWS using Terraform.
• Designing cloud-native solutions using MongoDB, Lambda, API Gateway, and other AWS services with a strong focus on serverless.
• Contributing to incident response efforts, production readiness, and reliability initiatives across engineering squads.
• Enhancing observability and platform insight through actionable alerting and data visibility using Datadog.
• Continuously improving CI/CD processes with GitHub Actions, reducing friction in delivery pipelines.
• Collaborating with software engineers (working in Node.js/TypeScript) to ensure secure, performant, and resilient applications.
• Mentoring engineers and champion DevOps culture and best practices across teams.

This role’s for you if…

• You’re a pragmatic platform engineer with experience in regulated environments, balancing delivery with compliance and operational excellence.
• You’re confident working with JavaScript/TypeScript-based applications and collaborating closely with development teams.
• You know what “good” looks like for databases like MongoDB and Postgres and can diagnose, design, and optimise for scale and resilience.
• You care deeply about observability - you don’t just monitor systems, you build alerts that engineers can act on.
• You’re fluent in AWS best practices, infrastructure-as-code (Terraform), and CI/CD tooling like GitHub Actions.
• You’ve had exposure to architectural decisions and willingness to own of platform-level outcomes.

This role isn’t for you if…

• You rely on a lot of top-down direction. Here, you’ll have a lot of freedom and ownership of your role, and you’ll be expected to shape your own progression
• You’re not comfortable working in a fast-paced environment. Our speed and scalability are what set us apart; you need to be able to act quickly and think on your feet
• You struggle to follow through on ideas. We value people who do what they say they will. If you care about something, you have the freedom here to make it happen
• You don’t like change. You’ll get on great here if you relish the ambiguity of rapid growth and are willing to embrace uncertainty

What’s in it for you…

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

• A salary between £55,000 and £75,000 – dependant on experience + reviewed annually
• 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
• Option to work abroad for up to six weeks a year
• Secclbrate - our recognition programme that offers a mix of flexible rewards including extra pay, additional holiday and increased learning budget
• 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
• 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

Our culture

We're proud to put people first, creating a culture where we truly listen to what matters most to them. Our transparent and inclusive environment encourages diversity of thought, challenge and experimentation.

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

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 – 60 mins Cloud System Design interview
• Second stage – 60 mins Terraform 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. 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.

Compensation: £55K – £75K

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