Principal Engineer

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.

commercetools

ABOUT COMMERCETOOLS Real innovation starts with a strong foundation, and at commercetools, that comes from the perfect balance of our product and our people. Behind every leap forward is a collective of builders, explorers, doers, makers, and problem-solvers. The kind of people who not only pioneered a more flexible approach to commerce architecture but also shaped the culture of experimentation that approach unlocked. Together they are the engine of commerce innovation today. At commercetools, we power the next era of commerce for our customers. Whether it’s AI-driven solutions that help enterprises make smarter business decisions, bridging digital and physical shopping experiences, or enabling entirely new ways for industries to connect with their customers, we help the world’s most ambitious companies experiment, scale, and grow without limits. Here the best idea wins, not the loudest voice. You will have the tools, trust, and space to not only build the future of commerce, but to build your own. YOUR IMPACT As our Principal Engineer Product Security , you’ll support the Engineering team by solving challenging technical problems for an ambitious product and enabling teams to "shift left" to build secure services on multi-cloud infrastructure.   You will: * Formulate, evangelise, and drive adoption of the product security strategy  * Assess, advise on, and increase the security maturity posture  * Create a standardised security architecture and operational best practices  * Help track and drive remediation of security and technology risks  * Educate product teams on risk assessments, threat modelling, and building secure api-first applications  * Review requirements and designs to help product teams address shortcomings  * Embed security tooling into the development process  * Contribute to the review of external penetration tests and help teams prioritise fixes  * Collaborate with product teams to improve overall security and resolve specific issues  * Facilitate or lead customer conversations regarding product security  * Triage and investigate new attack vectors to determine risk mitigation  * Drive security and quality initiatives across the organization and support certification audits  * Collaborate with Product Management, Principal Engineers, and legal/compliance teams  * Identify skills gaps and facilitate knowledge sharing across the organization    This role is hybrid, with three days a week spent in our Berlin, London or Valencia office.   WHAT SETS YOU APART You're a creative problem-solver who is wired to find solutions. You confidently dive into complex challenges and have a talent for making them simple for others. Your curiosity drives you to constantly grow and contribute to an environment of trust and teamwork. Great ideas come from many paths, and your unique perspective matters more than checking every box. What matters most is the mindset you bring to the work. You bring: * A strong technical background and 5+ years of proven track record in hands-on Product Security  * 2+ years of experience improving Product Security in a leadership role  * Experience with customer-facing security roles and influencing roadmaps in matrix organizations  * Experience in a scale-up environment with ambitious and competing priorities  * Expertise in formulating, elaborating, and clarifying requirements or priorities  * Experience with Secure Architecture design reviews and Threat Modeling  * Experience infusing security into various levels of the SDLC  * Experience with Static Analysis and Secure Code Review implementations  * Sound knowledge of Linux systems, Kubernetes, Terraform, Vault, API, and web application security  * Practical experience in DevSecOps and proficiency in at least one scripting language like JavaScript or Go  * Project management experience for projects affecting multiple teams  * Experience working within an Agile environment with a strong customer focus  * Experience setting up and running trainings or onboardings  * Clear written and verbal communication in fluent English    AI Aptitude: A genuine curiosity for using AI tools to work smarter and more effectively, paired with a drive to learn and put them into practice in your role. Nice to Have: * Security Certifications such as CISSP, CCSP, Certified Kubernetes Security Specialist, or GCP/AWS/Azure security certifications  * An eagerness to constantly improve and learn about leadership and new technologies    OUR BENEFITS Because work and life are connected, our benefits are too. We’ve designed them to give you the security, flexibility, and opportunities you need to focus on what matters most. 🩺 Comprehensive health benefits for you and your dependents, including access to OpenUp for personalized mental health support 📚 Learning and development opportunities including an annual learning budget, access to self-paced learning platforms and language training, personalized coaching, mentorship, and leadership programs 🍼 Family Leave Plus gives you additional fully paid weeks of parental leave on top of government-provided leave, so you can spend more time with your new addition 📈 Our equity participation program allows you to share in our success  For more information on our benefits, visit this page.   Come as you are. Build with us. Your unique perspective is essential to our success. We are committed to building a team that reflects the world around us because we know it’s the only way to build the future. We celebrate our differences and have created a hiring process that’s fair, inclusive, and designed to let your talent shine. We proudly welcome applicants of every race, color, religion, gender identity, sexual orientation, age, and any other part of your identity that makes you who you are. As an equal opportunity employer, we believe that our strength lies in our diversity, and we invite you to be a part of our global community.  For more information on our diversity, equity, inclusion, and belonging practices, visit this page.

Financial Times

ABOUT US The Financial Times is one of the world’s leading business news organisations, recognised internationally for its authority, integrity and accuracy. The FT has a record paying readership of one million, three-quarters of which are digital subscriptions. It is part of Nikkei Inc., which provides a broad range of information, news and services for the global business community. We have offices in more than 35 cities, including London, New York, Hong Kong, Beijing, Manila, Sofia, San Francisco and Tokyo. Join us and find an inclusive and fast-paced environment with unique opportunities to support every step of your career.  The FT is looking for a Principal Engineer (Individual Contributor) to lead our Edge Delivery & Observability work.    ABOUT THE TEAMS There are two teams in this area. The Edge Delivery & Observability (EDO) team looks after the cloud edge capabilities like CDNs, DNS etc, along with the monitoring and observability infrastructure at the FT.  Examples of the kind of work this team tackles are: * Managing and improving our central solution for observability tools like Graphite, Grafana, Splunk, Prometheus and Cloudflare. * Providing self service APIs and tools that enable other delivery teams to utilise the monitoring solutions. * Providing support to other delivery teams at the FT and helping them utilise core SaaS infrastructure products effectively. * Ensuring our solutions have high engineering standards (robust, fit for purpose, include synthetic testing and/or application monitoring) and meet our quality standards. The API Gateway team is a contract team, based in Bulgaria, who work on our API Gateway stack. This is built on top of Tyk, an open source API Gateway. Both teams are part of the Infrastructure & Operations Group at the Financial Times. We have a devops culture of empowered teams who take full responsibility for their systems. Infrastructure & Operations purpose: “We keep the business running.  Our job is to support and deliver fast, reliable, and cost-effective technology - so our FT colleagues can do their best work. We are responsive, we support change, and always aim for high performance.  When we’re at our best, the whole business runs better.”   ABOUT THE ROLE Principal Engineers provide technical direction and support to teams across the group. Each principal engineer looks after one or two feature teams, leading them to deliver quality tooling and products that reduce developer toil for all engineering teams at the FT. In addition to steering their immediate teams, Principal Engineers play a key role in the management of the department, * Work closely with the people manager within the teams * Engage with other disciplines (e.g.delivery, product management) and teams across FT to make sure we are all working together effectively * Model and help set and reinforce our inclusive, respectful, multidisciplinary and open culture * Help continuously improve our technology, process and culture, take ownership of problems and see solutions through to completion * Manage and maintain strong relationships with vendors * Gain a deep understanding of the FT as a business and use that knowledge to communicate clearly with your peers, reports, and senior management * Actively collaborate across teams both within and outside of I&O * Contribute to company-wide processes, frameworks, and guidelines   ABOUT YOU * You love collaborating with others to solve technical problems. * You have experience technically leading teams and projects. * You are an effective communicator, able to break down tasks as well as giving/receiving constructive feedback. * You are customer focused, with a strong focus on building and running reliable, stable and secure systems. * You are enthusiastic about operability & monitoring of systems and Cloud infrastructure.    THE TECH WE WORK WITH We don’t expect you to have worked with all of these, but if you have experience of these or equivalent tools, that will be a benefit * Cloud platform: AWS * Observability and monitoring tools: Splunk, Grafana, Prometheus * CDN: Cloudflare * DNS: Route53 * Python and Go   BENEFITS We have many great benefits. Some standout ones are: * A competitive bonus incentive scheme. * Extensive learning and development opportunities including 10% time, tech talks, internal conferences and opportunities to attend external conferences and training. * 25 days annual leave, increasing to 30 days after 2 years’ service. * Generous parental leave * Very competitive pension plan, with the company doubling your contribution. We currently operate a hybrid model which requires staff to work onsite 50% of the time, subject to role requirements & regular review. While flexible working requests will be considered, not all patterns are suitable for all roles. We believe this balanced approach supports flexibility and protects our culture, making collaboration and communication easier, building stronger relationships and team cohesion, and supporting peer learning.  We reserve discretion on reasonable notice to change this approach either generally or for specific individuals or teams.  OUR COMMITMENT TO DIVERSITY AND INCLUSION IN THE WORKPLACE At the FT, we believe that a supportive workplace is one where employees feel they can be themselves at work and have the flexibility they need to meet their personal needs. We committed to equality of opportunity. We are determined to create a diverse group at all levels of our Company and we welcome all members of the community we serve to apply for openings with us.   #LI-MG1