Senior Full Stack Product Engineer in London

Senior Full Stack Product Engineer in London

London Full-Time 58500 - 71500 £ / year (est.) Home office (partial)
Gravitas Group

At a Glance

  • Tasks: Build and deliver high-quality, scalable features for innovative SaaS products.
  • Company: Join a rapidly expanding SaaS company revolutionising digital marketing solutions.
  • Benefits: Competitive salary, flexible work options, and opportunities for professional growth.
  • Other info: Collaborative culture with mentorship opportunities and a focus on engineering excellence.
  • Why this job: Make an impact with cutting-edge AI technology in a dynamic scale-up environment.
  • Qualifications: Proficient in TypeScript, Node.js, and React or Angular; experience in high-growth startups.

The predicted salary is between 58500 - 71500 £ per year.

The Senior Full Stack Product Engineer joins a rapidly expanding SaaS company that is revolutionising how global brands assess digital influence and marketing impact. This role plays a pivotal part in developing a modern AI-enabled platform within a dynamic, scale-up environment.

About the Company

Our client is a venture-backed SaaS organisation specialising in data-driven marketing solutions for major consumer brands and agencies. They focus on leveraging AI, automation, and machine learning to support smarter decision‑making in marketing.

Role Overview

The Senior Full Stack Product Engineer will be responsible for building and delivering high-quality, scalable features across multiple products, including SaaS platforms, AI-powered tools, and internal dashboards. They will work closely with cross‑functional teams, contribute to architecture discussions, and mentor junior engineers. Success in this role involves delivering reliable, secure solutions that influence product direction and meet customer needs.

Key Skills & Experience

  • Lead development of full-stack features using TypeScript, Node.js, and React or Angular
  • Manage projects from discovery through deployment, ensuring scalability and quality
  • Drive engineering best practices and participate in architecture discussions
  • Conduct code reviews, mentor engineers, and contribute to technical strategy
  • Collaborate with Product, Data, and Commercial teams, translating customer problems into technical solutions
  • Build secure, reliable systems, maintaining high engineering standards

Nice to Have

  • Experience with NestJS, AI/LLM feature development, or early‑stage start‑up environments
  • Knowledge of B2B SaaS, MarTech, or AdTech sectors
  • Strong CSS/UI appreciation

Key Responsibilities

  • Build & deliver scalable, high‑quality full‑stack features
  • Own projects from discovery through deployment
  • Participate in architecture discussions and code reviews
  • Mentor engineers and foster knowledge sharing
  • Collaborate closely with cross‑functional teams to shape product direction
  • Enhance platform reliability, security, and performance

Requirements

  • Right to work in the UK
  • Proficiency in TypeScript, Node.js, and React or Angular
  • Experience with AWS, GCP, or Azure
  • Hands‑on experience working in high‑growth startups or scale‑ups
  • Strong product mindset and ability to make technical/product decisions

Senior Full Stack Product Engineer in London employer: Gravitas Group

Gravitas Group is an exceptional employer, offering a dynamic work environment that fosters collaboration and innovation. With a focus on employee growth, we provide opportunities for professional development and skill enhancement, particularly in the fast-paced realm of technology transformation. Our London location not only allows for meaningful engagement with key stakeholders but also immerses you in a vibrant city known for its rich culture and diverse community.

Gravitas Group

Contact Details:

Gravitas Group Recruitment Team

StudySmarter Expert Advice🤫

We think this is how you could land Senior Full Stack Product Engineer in London

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 Gravitas Group 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 Gravitas Group.

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 Gravitas Group.

Explore Job Boards Specifically for Tech Roles

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We think you need these skills to ace Senior Full Stack Product Engineer in London

TypeScript
Node.js
React
Angular
AWS
GCP
Azure

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 Gravitas Group.

Craft a killer cover letter:Your cover letter is your chance to stand out—make it personal! Explain why you want to work at Gravitas Group 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 Gravitas Group

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 Gravitas Group 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.