Principal Engineer, Platform

Smartly

As a Senior Quality Engineer at Smartly, you will define and scale quality standards across our Product & Engineering organization. Operating within a small, lean group, this role is highly visible to engineering leadership and offers the opportunity to make a massive impact across the entire company. Your success will be defined by your ability to build deep, trusted partnerships with engineering teams and align them with modern quality standards. You will act as a coach and catalyst - pairing with teams to uplift their practices, leveraging AI for high-velocity delivery, and ensuring quality is seamlessly integrated into how we scale. Working closely with our Staff Quality Engineer, Principal Engineers, and Infrastructure teams, you'll champion engineering excellence through hands-on collaboration and guidance. We are technology-agnostic but currently rely on TypeScript, Playwright, GitHub Actions, PostgreSQL, BigQuery and Sentry. You should be comfortable getting acquainted with new tools and approaches quickly. AS A SENIOR QUALITY ENGINEER, YOU WILL... * Build deep working relationships with Engineering Managers and leadership to champion engineering excellence and drive adoption of modern quality practices. * Partner directly with engineering teams by pairing on active tasks. Show them firsthand how to deliver fast with a predictable level of quality, establishing self-sustaining mechanisms so they can maintain this velocity without your active involvement. * Champion the use of self-service quality tools and guardrails. Your focus will be on getting teams to seamlessly incorporate these tools into their daily operations to ensure quality at scale. * Package the best practices and insights gained from pairing into robust, self-service quality tools and frameworks. This tooling will embed quality guardrails directly into daily operations, allowing engineering teams to maintain high standards at scale without your active, day-to-day involvement. * Dive into quality indicator metrics to identify trends, handle ad-hoc analytical requests, and translate complex data into clear, actionable insights. WHAT WE ARE LOOKING FOR... * 7+ years of experience in Quality Engineering, Software Engineering, or Developer Experience (DevEx), with a proven track record of leading cross-team initiatives and driving process improvements through collaboration. * Proven ability to build strong relationships with Engineering Managers and influence the entire product organization * You are persistent, highly autonomous, and comfortable operating in a tiny team. You don't wait for permission - you proactively unblock yourself and drive initiatives across the finish line. * While you don't need to be a hardcore technologist, you must have enough hands-on experience with modern tech stacks (TypeScript, Playwright, GitHub Actions, SQL databases) to pair effectively with seasoned developers and speak their language confidently. * Strong familiarity with utilizing LLMs to accelerate development workflows, with the experience of coaching others on how to use AI safely and efficiently. * Comfort with a rapid discovery and prototyping mindset. You value early feedback from internal "customers" and can pivot approaches quickly based on real-world findings. * Ability to work in a hybrid capacity from our Helsinki office 3 days a week (more if you like) WHAT WE OFFER YOU At Smartly, we offer a place where you can advance your career. Here, you'll find: An Inclusive Global Culture: Join a team of over 750 Smartlies, representing more than 60 nationalities across 24 locations in 13 countries. We cultivate a culture built on trust, transparency, and open feedback, where diverse perspectives are valued and encouraged. Global Impact: Contribute to a company making a global impact, directly influencing our customers' success and business growth. Focus on Wellbeing: We prioritize your health with healthcare packages, mental health services, and a commitment to work-life balance through paid holidays and family leave. Comprehensive Rewards: Benefit from equity options, performance-based rewards, competitive compensation, and career development opportunities. Flexible Hybrid Workplace: Experience a hybrid work model, balancing office collaboration with remote work, and the option to work abroad for up to 30 days annually. WHAT TO EXPECT FROM OUR RECRUITMENT EXPERIENCE: * Meet your Recruiter: Get to know each other and learn about working at Smartly. * Meet the Team Lead: A 1-on-1 with your closest collaborator to align on the role's vision. * Influence & Collaboration Session: A scenario-based discussion focused on how you build partnerships with Engineering Managers and navigate a change. * Coding & Architecture session: An interactive coding session where you'll design and implement a piece of internal developer tooling. * Meet the Leadership in a Final Meeting: A brief discussion with our SVP of Engineering. Apply Now and Shape Your Future with Smartly! ABOUT SMARTLY Smartly is the AI-powered advertising technology company transforming ad experiences for brands and their consumers. Our comprehensive advertising platform seamlessly integrates the capabilities of media, creative, and intelligence to power more than 800 billion impressions and generate more than 300 billion creatives annually, delivering tangible business outcomes for brands and advertisers. Smartly is the only company in the industry recognized as a Leader in The Forrester Wave: Creative Advertising Technologies with PwC validating the results it delivers for brands. We manage creative and media for 700+ brands worldwide and $6B in ad spend across the largest media platforms, including Facebook, Google, Instagram, Pinterest, Snap, and TikTok. Our end-to-end technology, unmatched access to media platforms and exceptional customer service help Fortune 500 brands to reach and engage consumers and learn what performs best.Smartly is a multinational and diverse team of 750+ Smartlies from 60+ nationalities, working in 13 countries. Together, we want to create and maintain an inclusive environment where everyone feels respected and heard. Our Diversity, Equity & Inclusion approach is at the heart of it. Visit Smartly to learn more. The processing of your information is described in our Candidate Privacy Notice.

Pinterest

About Pinterest: Millions of people around the world come to our platform to find creative ideas, dream about new possibilities and plan for memories that will last a lifetime. At Pinterest, we’re on a mission to bring everyone the inspiration to create a life they love, and that starts with the people behind the product. Discover a career where you ignite innovation for millions, transform passion into growth opportunities, celebrate each other’s unique experiences and embrace the flexibility to do your best work. Creating a career you love? It’s Possible. At Pinterest, AI isn't just a feature, it's a powerful partner that augments our creativity and amplifies our impact, and we’re looking for candidates who are excited to be a part of that. To get a complete picture of your experience and abilities, we’ll explore your foundational skills and how you collaborate with AI. Through our interview process, what matters most is that you can always explain your approach, showing us not just what you know, but how you think. You can read more about our AI interview philosophy and how we use AI in our recruiting process here. Millions of people across the world come to Pinterest to find new ideas every day. It’s where they get inspiration, dream about new possibilities and plan for what matters most. Our mission is to help those people find their inspiration and create a life they love. As a Pinterest employee, you’ll be challenged to take on work that upholds this mission and pushes Pinterest forward. As a Principal Engineer on the AI Platform team, you'll help architect the infrastructure that powers both Generative AI and Recommender Systems across Pinterest's entire product suite. Our team builds the end-to-end engines for petabyte-scale data orchestration, model training and fine-tuning, and high-performance inference, ensuring our models scale seamlessly to hundreds of millions of inferences per second in service of over 600 million monthly active users.   What you’ll do: * Set the technical vision and roadmap for the Pinterest AI Platform, aligning with business priorities and long-term company strategy. * Drive cross-functional strategic initiatives that advance our platform capabilities across: * Generative AI: multimodal data management, post-training, evaluation, and batch/online inference. * Recommender Systems: feature stores, training infra, and large-scale high performance inference. * AI-powered tools that automate the user experience across our platforms, connecting every stage of the AI/ML lifecycle to enhance productivity and accelerate development. * Cultivate a collaborative and inclusive culture where every team member feels welcome and empowered, and provide candid, constructive feedback that accelerates individual and team growth.   What we’re looking for: * Deep expertise in AI/ML infrastructure and distributed systems: Hands-on experience designing, building, and operating highly available, production-grade systems at large scale; strong technical judgment; and proficiency in at least one of C++, Java, or Rust. * Proven track record of company-wide impact: Experience leading cross-organizational initiatives, navigating ambiguity, defining technical strategy, influencing architecture decisions, and aligning cross-functional partners and executives around a shared direction. * Strong ownership and a high engineering bar: Sets and upholds high standards for engineering quality, integrity, and accountability, and takes end-to-end ownership of outcomes. * Bachelor's degree in Computer Science or a related field.   Relocation Statement:  * This position is not eligible for relocation assistance. Visit our PinFlex page to learn more about our working model.   In-Office Requirement Statement:  * We recognize that the ideal environment for work is situational and may differ across departments. What this looks like day-to-day can vary based on the needs of each organization or role. * This role will need to be in the office for in-person collaboration 1-2 times per quarter and therefore needs to be in a commutable distance from one of the following offices: Palo Alto, CA or San Francisco, CA. #LI-REMOTE #LI-AH2 At Pinterest we believe the workplace should be equitable, inclusive, and inspiring for every employee. In an effort to provide greater transparency, we are sharing the base salary range for this position. The position is also eligible for equity. Final salary is based on a number of factors including location, travel, relevant prior experience, or particular skills and expertise. Information regarding the culture at Pinterest and benefits available for this position can be found here. US based applicants only $242,634—$499,541 USD Our Commitment to Inclusion: Pinterest is an equal opportunity employer and makes employment decisions on the basis of merit. We want to have the best qualified people in every job. All qualified applicants will receive consideration for employment without regard to race, color, ancestry, national origin, religion or religious creed, sex (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender, gender identity, gender expression, age, marital status, status as a protected veteran, physical or mental disability, medical condition, genetic information or characteristics (or those of a family member) or any other consideration made unlawful by applicable federal, state or local laws. We also consider qualified applicants regardless of criminal histories, consistent with legal requirements. If you require a medical or religious accommodation during the job application process, please complete this form for support.   By submitting this application, I certify that all information submitted in my application and throughout the hiring process is true, accurate, and complete to the best of my knowledge. I understand that any false statement, omission, or misrepresentation may disqualify me from employment consideration or result in termination if discovered after hire.

9fin

About 9fin 9fin is the AI platform powering global debt markets — the world’s largest asset class at over $145 trillion. Debt markets are vast, global, and mission-critical, yet still run on fragmented data, PDFs, and manual workflows. 9fin replaces this broken infrastructure with a single platform that centralises proprietary credit data, deep analysis, and high-value workflows across global markets. Today, 9fin powers teams at 300+ blue-chip institutions worldwide, including global banks, asset managers, private equity firms, law firms, and advisors. The business is scaling at exceptional speed, with rapid expansion in the US and best-in-class retention driven by deep workflow adoption. We’re at a defining inflection point. With proven product-market fit and strong, global market pull, 9fin is accelerating toward becoming the category-defining platform for debt markets worldwide. WE'RE LOOKING FOR A PRINCIPAL ENGINEER TO OWN THE HARDEST TECHNICAL PROBLEMS AT 9FIN — THE ONES THAT CUT ACROSS TEAMS, DON'T BELONG CLEANLY TO ANY SINGLE DOMAIN, AND HAVE THE HIGHEST CONSEQUENCE IF THEY GO WRONG. 9fin sits at the intersection of financial data and AI. We ingest, model, and surface complex debt capital markets intelligence at scale. What we need now is someone who works across all of our areas (from AI, to Analytics, Platform, and Product Engineering) — setting the architectural standard, owning the foundational problems nobody else owns, and being the senior technical voice that makes the whole thing cohere. This is not a domain lead role. It's not advisory either. It's for someone who is energised by complexity and ambiguity, who wants to own the problems that are genuinely hard, and who can move between deep technical work and cross-org influence without losing credibility in either direction. WHAT YOU'LL OWN These are the cross-cutting problems that don't belong cleanly to any one team — but that everything else depends on. Core data model and entity resolution 9fin's value depends on how well we understand financial entities and the relationships between them — issuers, instruments, deals, counterparties, legal documents. This is hard: data is messy, sources conflict, and the model has to serve analytics, AI, and product simultaneously. You'll own the decisions that shape this foundation and hold the standard for how we model and resolve financial data at scale. Foundational architectural decisions When a decision is big enough to affect multiple teams and long-lived enough to be hard to undo, it lands with you. You'll write the RFCs, facilitate the debate, make the call, and be accountable for the outcome. WHAT YOU'LL OVERSEE You'll work closely with the Heads/Directors of Analytics, AI, Platform, and Product Engineering — not to run their domains, but to raise the bar across all of them. * Bring architectural coherence to decisions made within individual domains * Identify technical risks and compounding complexity before they become incidents * Set standards for engineering quality — system design, observability, reliability, API design — that every team builds to * Be the senior technical voice in cross-team planning, roadmap discussions, and major build vs. buy decisions * Mentor and stretch the most senior engineers across the org WHAT WE'RE LOOKING FOR You're the person who: * Has operated at principal or staff level in a data-intensive, fast-moving engineering org — and has the range to show for it * Can credibly walk into a conversation about data pipeline architecture, RAG evaluation, API design, or system scalability — and add something useful in all of them * Owns problems, not just opinions. You're not here to review and advise; you're here to make calls and be accountable for them * Writes code when it matters — the proof of concept that validates a direction, the deep dive that unblocks the team, the PR that sets the standard others build from * Has strong opinions about what good engineering looks like and can defend them without being precious about being wrong * Is energised by the problems nobody else can solve, not unsettled by them Technical bar: * Deep experience with complex data modelling, entity resolution, and data pipelines in production environments * Proven experience designing and shipping AI/LLM systems — RAG, structured extraction, evaluation frameworks — beyond the prototype stage * Strong backend and distributed systems knowledge: APIs, service architecture, scalability, observability * Experience making and owning foundational architectural decisions that affected how an entire engineering org worked * Proficiency in Python; comfort across the stack where it matters Nice to have: * Experience with financial data, legal documents, or other semi-structured, domain-rich datasets * Background as a founding engineer, early-stage CTO, or technical lead who has built systems from scratch and lived with the consequences WHY THIS ROLE * The problems you'll own are genuinely hard — messy financial data, complex entity relationships, AI systems where correctness really matters * You'll have real authority over foundational decisions, not just influence over them * 9fin's engineering org is strong and growing — you'll be working with and stretching great engineers, not compensating for weak ones * High ownership, high impact, and the chance to shape how a serious data and AI company scales its technical foundations Benefits We’re a scaling start up and we enjoy sharing our success, when the company succeeds, we always reinvest that in our people. We also offer huge amounts of responsibility, an abundance of opportunity for growth and a platform to truly excel. Financial & Insurance * Competitive Salary (our salary bands are benchmarked at the top end of the market) * Equity options * Pension (your minimum contributions are 4% with 9fin matching up to 7%) * Private Medical Insurance * Paid sick leave with Income Protection for long periods of illness * Group Life Assurance * Season Ticket Loan & Cycle to Work schemes Time off * 25 holiday days per year * Local public holidays (with the ability to exchange them for alternative days) * Hybrid working model, to allow you the flexibility to decide how, where and when you do your best work * Work abroad for up to 3 months a year * 1 month paid sabbatical after 5 years of service * Enhanced parental leave & flexible working arrangements available Training & Culture * Professional learning and development budget * Quarterly team socials * Summer and Winter company social events 9fin is an equal opportunities employer At 9fin we are dedicated to building and promoting a fair and inclusive workplace where everyone can reach their full potential and truly belong. We recognize that building diverse teams enables a more creative and productive environment. If you’re excited about this role but your experience doesn’t perfectly align with the job description, we encourage you to apply anyway. You might just be who we’re looking for — either for this role, or perhaps another.