Product Engineer (Backend)

Senior Product Engineer [Backend]

Attio

Attio is the CRM built for the AI era. Designed for the most ambitious go-to-market teams, it gives companies the power to understand every customer, automate at scale, and build their go-to-market motion exactly as they need. We've raised $116M from some of the world's best investors: GV (Google Ventures), Redpoint, Balderton, Point Nine, and 01A. We hire builders who thrive on complex technical challenges, hold themselves to a high bar, and genuinely care about delighting the people who use what they build. The team here brings sharp judgement, real craft, and the drive to do exceptional work. We're obsessed about the details and energized by the frontier. If you want to do the best work of your career, this is the right place. ABOUT THE ROLE Our Engineering team tackles the toughest challenges, so our users never have to. Real-time infrastructure, AI-native architecture, and a frontend that feels effortless - all powered by a team that moves fast, thinks rigorously, and holds an exceptionally high bar for quality. We’re looking for a Senior Product Engineer who takes pride in pushing boundaries, obsesses over details, and wants to help reinvent how millions of people work. WHAT YOU'LL DO * Use your strong expertise in TypeScript/Node.js/GCP to move the company and product forward * Lead projects end-to-end to solve real customer problems * Architect the systems which power new features to support our high standards of performance, reliability, security and scale, and re-architect existing systems as their scaling demands grow * Design REST API contracts for both internal and external consumers that are easy to work with * Represent Attio’s Product & Engineering values both internally and externally WHAT YOU'LL BRING * Experience designing scalable, reliable, secure backend systems * Excellent knowledge of modern Cloud Native systems architecture * Expertise with Node.js and TypeScript * A track record of ownership and product delivery * A proactive, self-motivated problem solving attitude, with a strong passion for advancing and innovating in distributed systems * The ability to communicate technical ideas to the wider team and influence stakeholders across Engineering, Product and Design Nice to have: * Experience contributing to, or participating in open source projects * An interest or experience in mentoring other members of the team * Experience working with data-rich backend applications, or processing large volumes of real-time data * A love for experimenting with new ideas, tools and techniques, and exploring new technologies WHAT WE OFFER * Competitive salary of £95,000 to £125,000 * Equity in an early-stage tech company on an incredible trajectory * 25 days holiday plus local public holidays * Apple hardware * Private medical insurance through AXA * Pension contribution through Hargreaves Lansdown * Enhanced family leave * Team off-site in fun places! (We've been to Barcelona, Lisbon, Malta, and Split so far)

Senior Product Engineer (AI)

Plain

Plain is redefining customer support for the next generation of B2B companies. We’re building the fastest, most powerful platform to help companies move beyond reactive support and build true customer relationships. Some of the world’s most forward-thinking companies - like Cursor, Raycast, and Granola - trust Plain to unify all customer interactions, enable faster team collaboration, and supercharge their workflows with AI. B2B customer support is undergoing a seismic shift. AI is transforming the way companies engage with customers, shifting support from a siloed function to a company-wide effort across Slack, Discord, and any other channel you talk to customers in. The old way - slow, manual, and disconnected - no longer works. This role is hybrid with 3 days a week in our London office. WHAT YOU’LL DO We’re in a rare spot. Plain is already powering support for high-growth companies with a lightning-fast, deeply scalable platform. AI has been part of our DNA from the start. Now we’re doubling down to define how it shapes every layer of modern customer support. This is where you come in. We're looking for a customer obsessed Senior Product Engineer to help take our AI ambitions to the next level. You’ll build the Infrastructure that helps us build AI features quickly, safely and with confidence. You’ll own problems end to end, and play a key role in building a category-defining product. In this role, you will: * Own and ship AI features such as our agents, assistants, insights and more - from concept to production. * Design and implement backend services for AI integrations and data pipeline. * Build robust APIs and abstractions for internal AI usage * Drive system scalability: caching, optimization, processing patterns, etc * Contribute and drive the evolution of the infrastructure for AI including architecture, evaluation and iteration pipelines. * Solve complex AI challenges around AI accuracy, reliability, and quality – using rigorous quantitive approaches. * Advocate for our work externally – writing, speaking, and engaging with the broader AI community. THIS IS A GREAT FIT IF YOU… * Are an experienced backend engineer who’s shipped AI products in the OpenAI & Anthropic era – especially text and data-heavy AI applications. * Have hands-on experience with LLM orchestration and LLM API optimization (costs, latency, etc) * Are familiar with RAG architectures and technologies * Have AI observability experience. AI isn’t just about shipping features that sound great – it’s about knowing, conclusively, if they’re making things better. * Have a clear perspective on what makes a great AI product. We want to apply AI with precision, nuance, and real impact – not as a gimmick. * Are product minded and customer focused in how you build software. * Measure your success by user impact, not just technical elegance. * Are self-driven, impact-focused, and thrive in a fast-moving, high-ownership environment. * Bonus: you have experience with agent frameworks and design. THIS WON’T BE THE RIGHT ROLE IF YOU… * Have primarily academic or research ML/AI experience. This role’s looking for someone with Applied AI experience. * Think AI for support is just chatbots and deflection. B2B support is complex – we want AI through the platform, not just automating conversations. * Struggle with ambiguity. We’re an early-stage startup. Things change quickly, and often, knowing what to work on is as important as the work itself. * Prioritize working with the latest tech for its own sake. We choose tools that make us productive – not what’s trendy. (Postgres is great.) * Are looking for a management role. This is a hands-on individual contributor position. * Want the perks of a big company. We offer competitive compensation for our stage, but we’re a startup – this is a different kind of opportunity.

Backend Product Engineer (Mid-level)

Freetrade

ABOUT FREETRADE Freetrade’s mission is to become the default place to invest. Investing has been too complicated and expensive for too long, keeping millions from making the most of their savings. We’re changing that. We’re building our team and looking for people who are excited to reshape how our customers invest and grow their wealth. If you’re driven by solving complex problems and building innovative products, you’ll fit right in. 2026 is a big year for us. Last year, we announced a game changing deal to become part of the IG Group. We’ll continue to operate as an independent business while gaining access to the resources and support of an established leader in the space. This year, we’re accelerating our roadmap and taking our products to the next level. We’re building new features like mutual funds, bonds, and family investment tools. We’re also exploring how we can leverage AI to deliver an even better experience for our customers. Why Join Our Engineering Team? Be part of a team that’s shaping the future of investments. As an engineer, you’ll play a pivotal role in developing and maintaining a robust, scalable platform used by thousands daily. We tackle complex technical challenges, drive innovation, and build solutions that make a real impact. Here, your code doesn’t just run - it powers the decisions of investors across the UK. Join us and turn ideas into reality. We are looking for an exceptional Software Engineer, to join our Backend Engineering squad. Our main tech stack: * NodeJS/Typescript * Google Cloud Platform * Postgresql Key Responsibilities * Develop high-quality software within agreed timelines, addressing complex problems by proposing various solutions and considering trade-offs to assist your team in making effective technical decisions. * Solve technical challenges by delivering scalable and maintainable solutions efficiently, while balancing trade-offs. * Understand the core features and KPIs of your product, working closely with the Product Manager to drive the product’s development. * Be comfortable in an on-call environment, responding to high-priority issues and knowing when to escalate them. About You * You have at least 2+ years of professional software engineering experience. * Collaborate openly, share knowledge with teammates, and take shared ownership of software design decisions. * Hold yourself to a high bar for code quality and are receptive to constructive feedback as well as able to give it. * Can work through complex and unfamiliar problems with a clear head, knowing when to push through independently and when to loop in the right people. * Have a keen eye for detail and take pride in understanding your work thoroughly. You have a genuine interest in the world of investments. * Stay current with technology trends and actively apply good engineering practices in your day-to-day work. Benefits & Logistics Freetrade is the place to accelerate your career. Our benefits package and ways of working are designed to attract and retain the most talented people who are dedicated to making an impact at Freetrade. Here’s what’s on offer in 2026: Hybrid working culture We’re operating in a hybrid model: 3-days in-office / 2-days from home. We believe great collaboration happens in person and our beautiful offices in central London and Budapest are designed to bring people together. 🏢 Office days: Monday, Tuesday, Thursday 🏡 Work from home days: Wednesday, Friday This setup helps us stay connected, collaborate more effectively, and keep building a culture where we all do our best work together, including dedicated days for focus work. Flexibility for those who need it: We have a hybrid working model, but life happens. If you need flexibility let's talk about it, whether you're a parent or have other care responsibilities. Values At Freetrade we live and breathe our values: Honesty, Focus and Grit. Expect to be asked about these in your interview! Benefits In London: * Competitive salary – carefully benchmarked. * Bonus Scheme: join us and share in our growth. Bonuses are linked to both company success and your individual impact. * Holidays – 25 days plus UK public holidays. Your birthday off, plus one extra day for every year at Freetrade. * Enhanced pension – We’ll match your contributions up to 7%. * Group Life Insurance – Protect your loved ones with coverage at 5x your salary, ensuring financial security in any circumstance. * Private Health Insurance - Which includes access to high quality medical care, mental health support, dental and vision plans, Wellness programs and preventative care initiatives are also provided to ensure the wellbeing of your entire family. * Income Protection Cover – Safeguard your income with comprehensive coverage, ensuring financial stability in the event of illness or injury. * Enhanced parental leave – Time off when it matters most. * Flexibility for those who need it – We’re office-first, but life happens. Whether you’re a parent or have care responsibilities, we focus on output and trust you to manage your time. * Learning & Development – We fund industry qualifications so you can grow as a financial services professional. * Cycle to Work scheme – Get a high quality bike and gear through our salary sacrifice scheme, spreading the cost with tax free monthly instalments. * Paid Sick Leave – Receive 10 days of fully paid sick leave each calendar year. Interview Process We keep things simple and transparent. Our process typically includes: 1. Initial interview – A chat with our Senior Talent Partner. 2. Hiring Manager interview – A deep dive into your skills and experience. 3. Live Coding – Show us how you think and solve problems. 4. System Design – We’ll explore how you design systems to handle real-world challenges. 5. Final Executive interview – A conversation with our stakeholders, where we also assess cultural fit. * We use Node.js, TypeScript and GCP in our production environment. However, our interview process is language-agnostic, we’re more interested in how you approach problems than the specific tools you use. That said, we do expect you to be open to working with our tech stack if you join us. We are an Equal Opportunity employer committed to a diverse and representative team. Whatever your race, religion, colour, national origin, gender, sexual orientation, age, marital status, or disability - we want to hear from you. To find out more about how we look after your personal data when you apply for a job with us, please see our Recruitment Privacy Policy here. Please note we are not accepting agency CVs.