At a Glance
- Tasks: Build and maintain AI-powered infrastructure, focusing on AWS and CI/CD pipelines.
- Company: Join a dynamic startup with $10.3M funding and a collaborative culture.
- Benefits: Remote-first work, competitive salary, and opportunities for professional growth.
- Other info: Work with a small team of experienced founders from top tech companies.
- Why this job: Shape innovative products that impact millions of users every month.
- Qualifications: Experience in AWS, Infrastructure as Code, and strong problem-solving skills.
The predicted salary is between 60000 - 80000 £ per year.
What We’re Building
AI‑powered infrastructure company with $10.3M in funding from top‑tier investors. Exciting product: APIs, attribution models, MCP integration, AI‑based recommendation engines, and assistants – not your typical CRUD app. Real traction: 30+ new customers every month, 10M+ end users monthly. Small team, so you’ll genuinely shape how we build things. You’ll touch everything from frontend widgets to backend infrastructure to data pipelines. The work doesn’t get repetitive. We actively learn about new tech and AI tools and adopt where we can – we have to, because our customers do. Remote‑first, but we get together regularly—company‑wide and as an engineering team. The founding team consists of serial founders and experienced big‑tech operators from Twilio, Wise, and Skype.
Why Join
We help SaaS companies turn their users and partners into a sales channel through referrals, sharing, and recommendations. 10M+ end users interact with our system every month. Our widgets live inside customer products, so your code runs in environments you don’t control. On top of that, we provide APIs that customer developers integrate against, and a portal where customers manage their campaigns and analytics. Under the hood we deliver attribution across complex user journeys, AI‑based recommendation engines, and multi‑tenant infrastructure serving hundreds of customers at scale. Our product is integrated by customer developers – and that world is changing fast. The people building against our APIs and widgets range from corporate engineering teams to solo founders using AI coding agents. Staying current with how developers work today and ensuring our product fits those workflows is an exciting challenge.
Your Mission
- Setup and maintain AWS infrastructure – architecture, reliability, security, and cost.
- Work directly with stakeholders with no intermediate teams.
- Design and maintain CI/CD pipelines that enable ship from commit to production with zero manual steps.
- Help decide when to ship fast to learn and when to solidify the foundation.
- Influence architecture and product direction beyond coding tickets.
- Adopt the latest AI improvements to accelerate building and shipping.
About You
- Good communication skills and a collaborative attitude.
- Experience building systems at real scale: high traffic, large user base, high availability.
- Deep AWS expertise across compute, messaging, storage, networking, and observability.
- Strong experience with Infrastructure as Code (Terraform or similar).
- Solid distributed systems thinking: ordering guarantees, idempotency, retries, at‑least‑once delivery, partial failure recovery.
- Experience running PostgreSQL in production – configuration, connection pooling, migrations, performance, backup and restore.
- Application‑layer literacy to read TypeScript/Node.js (NestJS) code.
- Good judgement of when 'good enough' is sufficient and when to invest in quality.
- Strong problem‑solving ability; break down complex, ambiguous problems and ship pragmatic solutions.
- Contribute ideas and challenge assumptions, not just execute.
- Genuinely curious about the product itself.
- Knowledge of agentic coding tools such as Claude Code, Cursor, multi‑agent setups, etc., and using them to push limits.
- Strong work ethic – ownership, shipping commitments, self‑motivated.
Nice‑to‑Haves
- Strong opinions about observability – structured logging, distributed tracing (OpenTelemetry), dashboards and alerting built for on‑call humans, not vanity metrics.
- Experience operating event‑driven architectures under load (SQS, Kafka, or similar).
- Familiarity with data warehousing / analytics (ClickHouse, Snowflake, or similar).
About us
We are the revenue‑growth infrastructure for digital businesses to acquire, retain, and monetize customers at scale in the AI era. Cello turns word‑of‑mouth into a systematic growth channel. Our referral platform allows users and affiliates to share and discover any software product with only a few clicks, inspiring users to share the products they love and virtually reinventing how companies sell and market products. Category leaders including Typeform, Miro and Veed trust Cello to accelerate their growth flywheel.
Senior Platform Engineer: AI-Powered Scalable Infra & CI/CD employer: Cello
At Cello, we are not just building AI-powered infrastructure; we are creating a dynamic environment where innovation thrives. As a Senior Platform Engineer, you will have the opportunity to shape our cutting-edge products while working alongside a small, talented team of industry veterans from Twilio, Wise, and Skype. With a remote-first culture that encourages collaboration and regular team gatherings, we offer a unique blend of flexibility, continuous learning, and the chance to make a significant impact in the rapidly evolving tech landscape.
StudySmarter Expert Advice🤫
We think this is how you could land Senior Platform Engineer: AI-Powered Scalable Infra & CI/CD
✨Join Local Tech Meetups
Get out there and mingle with fellow developers by joining local tech meetups. It’s a fantastic way to meet people who might be working at Cello or know someone who does. Plus, you can pick up some trendy tech skills and trends while you're at it!
✨Contribute to Open Source Projects
Show off your coding chops by jumping into open-source projects. Not only does this give you practical experience, but it also gets you noticed in the dev community. You'll create a killer portfolio that speaks volumes about your skills to Cello.
✨Tap into Online Developer Communities
Don’t underestimate the power of online developer communities like GitHub, Stack Overflow, and even Reddit. Participate in discussions, share your projects, and build your visibility. We can often find opportunities through these channels that can lead to a full-time gig at companies like Cello.
✨Explore Job Boards Specifically for Tech Roles
Keep your eyes peeled on job boards that focus on tech roles. Sites like TechCareers or Stack Overflow Jobs can often have listings for companies like Cello that might not show up on broader job sites. Make it a habit to check these regularly, and don’t hesitate to apply directly through our website!
We think you need these skills to ace Senior Platform Engineer: AI-Powered Scalable Infra & CI/CD
Some tips for your application 🫡
Show off your coding skills:When applying for a software engineering role, it's super important to showcase your coding skills. Make sure your CV includes your tech stack, any relevant programming languages you’re comfortable with, and examples of projects you've worked on. If you have a GitHub profile, link it up! We love to see code in action.
Tailor your portfolio:For a full-time role, we’d expect to see some solid examples of your work in your portfolio. Make sure to include at least two or three projects that highlight your problem-solving skills and your ability to work with different technologies. Focus on the projects that are most relevant to the position at Cello.
Craft a killer cover letter:Your cover letter is your chance to stand out—make it personal! Explain why you want to work at Cello and how your skills align with the role. Show us your passion for software development. We dig enthusiastic candidates who understand the value of collaboration and continuous learning!
Be clear and concise:When it comes to writing your CV and cover letter, clarity is key. Avoid jargon that could confuse us and stick to simple, direct language. Highlight your achievements with quantifiable results where possible, and keep everything easy to read. A well-organised application goes a long way!
How to prepare for a job interview at Cello
✨Brush Up on Your Coding Skills
For a full-time software engineering role, it's crucial that we stay sharp with our coding abilities. Expect technical questions that might involve solving problems on the spot or discussing algorithms. Practise on platforms like LeetCode or HackerRank to get comfortable with the types of questions that often come up.
✨Know Your Tools and Frameworks
Make sure we’re well-acquainted with the tools and technologies listed in the job description. Familiarise ourselves with any specific frameworks or programming languages mentioned. If Cello uses React or Node.js, for instance, be ready to discuss how we’ve used them in previous projects or coursework.
✨Showcase Your Projects
Bring along a portfolio that highlights our best work. This could be code samples, GitHub repositories, or any side projects we’ve built. Make sure we can talk through our thought process for each project, especially the challenges we faced and how we solved them—this shows our problem-solving skills in action.
✨Prepare for Behavioural Questions
While technical skills are key, full-time positions also require cultural fit. Be ready to discuss our previous experiences and how we handle teamwork, conflict, and deadlines. Brush up on the STAR method—Situation, Task, Action, Result—to clearly articulate our past experiences when discussing how we've contributed to a team.
