Senior Product Engineer

Polar

WHY POLAR? It's never been easier to build, ship and scale software. But it's never been harder to monetize it. Modern startups look fundamentally different than prior generations: * Smaller teams * Exponential revenue growth relative to headcount * Higher variability in costs (LLMs) requiring more frequent pricing iterations * Laser focused on product development and distribution * Delegating and automating everything that is boilerplate – be it in their codebase or business operations. Exceptional billing primitives, APIs and SDKs are essential, but delightful integration is not enough. Startups need a billing platform designed for their speed of iteration. Combining billing and analytics in one platform to offer customer- and feature unit economics in real-time. Offering built-in pricing and cost insights, simulations and optimizations while simultaneously handling international compliance, tax management, fraud prevention and more. That's Polar. We're building the next standard for applied AI startups. Join our small, talented and engineering-led team across Europe as we build the infrastructure powering the next generation of software companies. We focus on shipping at high velocity to serve startup founders scale their businesses. Everything else is secondary. ROLE & RESPONSIBILITIES: WHAT YOU WILL DO We’re hiring a Senior Platform Engineer to architect and evolve the Polar platform - ensuring the system remains fast, resilient and operationally sound as we scale. Polar operates as a merchant of record, meaning our platform sits directly in the critical path of global payments, billing infrastructure and financial workflows. Reliability, uptime and correctness are essential - while still maintaining the ability to move quickly and ship product improvements. You’ll work across the platform and infrastructure layers that power Polar - from core infrastructure and observability to deployment safety, internal tooling and reliability engineering. In close partnership with the team, you’ll ensure the system scales to handle increasing traffic, architectural complexity and regulatory demands without compromising stability, performance or developer velocity. This role is ideal for someone who treats reliability as a product requirement and scalability as an architectural discipline, combining deep systems engineering experience with a passion for building reliable, scalable platforms and empowering engineering teams through strong abstractions and automation. While this role focuses primarily on the foundational layers of our platform, we value engineers who are comfortable moving across the stack when needed to ship quickly and maintain momentum. You’ll work with the team to: * Ensure Platform Reliability & Uptime: Design and evolve systems that maintain high availability, predictable performance and operational stability. Drive improvements in uptime, resilience and operational discipline as the system scales. * Engineer for Scale & Performance: Strengthen how our distributed services behave under load. Identify bottlenecks, optimize critical paths and design systems that scale with growing traffic and complexity. * Advance SRE & DevOps Practices: Embed reliability engineering practices across the platform - defining SLOs and SLIs, improving incident response, reducing operational toil and making production behavior measurable and actionable. * Evolve Cloud & Infrastructure Systems: Continuously evolve Polar’s infrastructure baseline and determine when the current stack needs to evolve. Improve infrastructure-as-code, environment management and operational safety mechanisms. * Strengthen Deployment & Operational Safety: Refine CI/CD systems, rollout strategies and rollback mechanisms to ensure changes are safe, observable, reversible and fast to deploy. * Improve Observability & Debuggability: Advance logging, metrics and tracing standards so engineers can quickly understand, debug and resolve issues in production. * Collaborate across Engineering, Risk & Legal: Work closely with product and infrastructure engineers, as well as risk and legal stakeholders, to translate evolving regulatory requirements into clear technical abstractions while maintaining long-term platform reliability and health. WHAT WE’RE LOOKING FOR Systems Thinking & Operating Mindset * Deep systems thinking: You anticipate failure modes, design for idempotency and consistency, and think carefully about how distributed systems behave in production. * Security- and compliance-aware engineering mindset: You build with auditability, principled access control and regulatory constraints as first-order design considerations. * End-to-end ownership: You are comfortable owning features from infrastructure and backend systems all the way to shipping functionality that powers the product. While this role focuses on platform layers, we value engineers willing to work across the stack when needed. * Strong product judgement: You know when to move fast while ensuring that correctness, auditability and long-term system integrity take precedence. * High-ownership collaboration: You thrive in small teams, collaborating closely across engineering to evolve the platform architecture and take shared responsibility for the long-term health of the system. Technical Skills * Strong backend expertise - you design clear, durable APIs and build systems that are resilient under real-world load and edge cases. * Highly proficient in SQL and data modeling - you reason rigorously about long-term data correctness, performance and reliability across large datasets. * Strong production debugging and observability instincts with an ability to trace complex issues across services and understand how to prevent them in the future. * Experience building or operating distributed systems with strong reliability and operational requirements. Experience * 5-8+ years of engineering experience, building and scaling customer-facing SaaS or fintech products in a high-growth environment. * Experience in payments and billing infrastructure - subscription lifecycles, transaction orchestration, refunds/disputes, payouts and financial state management. Nice-to-have: Open source contributions or side projects/apps to showcase. WHAT WE OFFER * Meaningful ownership: Small team & large surface area. You’ll directly influence how the company and platform scale. * Product-driven culture: We build to empower the next generation of software companies - and operate with the same builder mindset internally. * Competitive compensation: Salary and equity aligned with the impact of the role. * Exceptional team: Work with highly talented team members distributed across Europe. * Remote-first environment: Work from anywhere in Europe, with a home office setup budget available. * Annual team offsites: As the team is spread across Europe, we gather in person at least once a year to collaborate, plan, and spend time. * Health Benefits: Comprehensive health coverage to support you and your family. * Parental leave: Paid parental leave aligned with the standards and regulations of your local jurisdiction. HOW WE HIRE Polar is a remote-first company, with team members across Europe, and our hiring process is fully remote via video calls and email. HIRING PROCESS 1. Application Review: We review your application and previous work. 2. Intro call: A short conversation with Birk (Founder and CEO) to learn more about you and give you a chance to learn more about Polar. 3. Take-home Assignment: A practical exercise designed to reflect the kind of problems you would work on in the role. 4. Assignment Review: We review your assignment and feedback together 5. Team Conversations: 2-3 video calls where you get the chance to meet future team members. 6. Offer 🎉 7. Reference Calls

Cradle

THIS IS CRADLE Proteins are the molecular machines of life, used for many therapeutic, diagnostic, chemical, agricultural and food applications. Designing and optimizing proteins takes a lot of expert knowledge and manual effort, through the use of custom computational and biological tools. Machine learning is revolutionizing this space, by enabling high-fidelity protein models. At Cradle, we offer a software platform for AI-guided discovery and optimization of proteins, so that biologists can design proteins faster and at scale. We are already used by clients across biopharma, biotech, agri-tech, food-tech, and academia. We're an experienced team of just over 100 people. We've built many successful products before and have enough funding for multiple years of runway. We are distributed across three offices in Amsterdam, Boston, and Zurich, alongside a few remote colleagues. We offer our employees a very competitive salary, a generous equity stake in the company and a wide range of benefits and career progression opportunities. YOUR ROLE As an Engagement Manager within our Customer Success team, you’ll ensure that Cradle’s largest customers achieve success across their entire protein R&D portfolio. While your Scientific Advisor peers drive success at the project level, you will own success at the portfolio level — building deep relationships with senior stakeholders, aligning on portfolio success metrics, and ensuring our software and services deliver measurable value across departments and programs. You’ll serve as a trusted partner to senior leaders in global biopharma and industrial biotech companies, guiding strategic planning, adoption, and expansion of Cradle’s platform. Working closely with Scientific Advisors, Account Executives, and Product teams, you’ll translate Cradle’s scientific impact into business outcomes and long-term partnerships. YOUR RESPONSIBILITIES Strategic Account Leadership * Oversee post-sale success across global biotech and pharma customers, from initial onboarding to long-term, broad adoption. * Define and track portfolio-level success metrics and ROI, presenting progress to senior customer stakeholders. * Establish and lead steering committees to align stakeholders and ensure Cradle delivers measurable impact. * Understand customer budget cycles, licensing models, and R&D roadmaps to identify timely opportunities for growth and renewals. * Partner with Account Executives to expand Cradle’s footprint across new business units and therapeutic areas. Program and Relationship Management * Coordinate with Scientific Advisors to ensure smooth project initiation, resource allocation, and execution within licensed project slots. * Manage multi-workstream engagements, ensuring alignment across Science, Product, and ML teams. * Inspire and lead your cross-functional Cradle team to deliver seven star customer experiences. * Act as the primary escalation and coordination point for enterprise accounts. Customer Experience and Voice of Customer * Solicit, capture and communicate customer feedback, driving improvements in Cradle’s product and service delivery. * Partner with Product and Machine Learning Research teams to align customer strategic priorities and Cradle’s roadmap. * Design and co-create training and education initiatives that empower scientists to succeed on the Cradle Platform. * You will advocate for Cradle’s customers internally without losing sight of the delivery efficiency and interests of the Cradle team. YOUR QUALIFICATIONS Must-haves * Deep understanding of biopharma R&D workflows and the ability to confidently engage with executive stakeholders as well as experimental and computational scientists. * 5–7+ years in enterprise client-facing roles (program management, consulting, or customer success) ideally in Life Sciences. * Proven ability to lead complex, multi-stakeholder programs and drive measurable ROI. * Strong relationship-building, executive presence, crisp communication, and excellent organizational skills. * Comfortable presenting scientific and business insights to internal and external cross-functional audiences. * MSc or advanced degree in Molecular Biology, Biotechnology, Bioengineering, or a related field, or equivalent professional experience. * Willingness to travel to- and work from customer sites (20% of the time). Nice-to-haves * Experience managing enterprise SaaS deployments. * Familiarity with services commercials (SOWs, budgeting, resourcing, and change orders). * Experience with machine learning applications in life sciences or biotech. OUR COMMITMENT TO INCLUSIVE HIRING Cradle evaluates all candidates based on merit, regardless of sex, gender, ethnicity, socio-economic background, or any other aspect of identity. We maintain zero tolerance for discrimination and actively encourage candidates from all backgrounds to apply. AI DISCLOSURE Cradle uses an applicant tracking system that includes basic AI-assisted features which may generate scores or rankings based on how applications match a job description. These outputs are not used to make or meaningfully influence hiring decisions — all candidates are evaluated through a thorough, human-led review by our recruiting team. A NOTICE ABOUT RECRUITMENT SCAMS Please be aware that scammers are posing as us in order to get your personal details or money. We only communicate via @cradle.bio email addresses, we only make job offers after having met you in person at our office in Zurich or Amsterdam, and we never ask you to pay for anything during the interview process.

Aurelian

ABOUT AURELIAN Aurelian builds AI tools that help 911 centers handle more with less, so telecommunicators can stay focused on what matters most and communities get the response they need. AVA is a conversational AI agent that answers non-emergency calls; the agent routes, triages, and resolves the calls without any human intervention. By handling administrative calls like noise complaints, lost dogs, and parking inquiries, AVA eliminates hold times and lets call-takers focus their energy on actual emergencies. CORA supports call-takers on the calls that matter most. CORA is an on-screen assistant that delivers real-time SOP checklists, smart reminders, and contextual guidance as an emergency call unfolds, so dispatchers stay calm, consistent, and confident when every second counts. When AVA detects an emergency mid-call, it transfers the caller to a telecommunicator and passes along the caller details, location, incident type, and key statements directly into CORA. The call-taker never starts from scratch. The problem we're solving is serious. The average emergency communications center is 30% understaffed nationwide. Staffing shortages drive burnout and attrition, which makes the shortage worse. Meanwhile, 60-80% of the calls coming in aren't even emergencies at all. Aurelian addresses both sides of that equation: AVA reduces unnecessary call volume, and CORA makes every emergency call more manageable for the people handling it. Aurelian is live in centers across the country, answering thousands of non-emergency calls every day, and is backed by New Enterprise Associates and Y Combinator. Aurelian is growing rapidly; we are hiring people who want to help scale this work and make a real difference in public safety infrastructure for communities across the country. WHY JOIN US We're hiring a Senior Product Engineer to own product outcomes end-to-end. We don't have product managers at Aurelian — our engineers talk to customers, decide what to build, and ship it. This role is for someone who is as excited about why we're building something as how. You'll write code every week, but the thing that makes you exceptional is your ability to deeply understand a problem, make smart product decisions, and own the outcome.   WHAT YOU’LL BE DOING * Own product outcomes, not just features: You won't be handed a spec. You'll talk to customers, identify the highest-leverage problems, figure out what to build, and build it. * Be the PM for your area: You'll define the roadmap, make prioritization tradeoffs, and communicate progress across the company. * Ship fast and iterate: Build and ship features across our platform — from AI call handling, to dispatcher-facing tools, to analytics and integrations. Get things into customers' hands, learn, and iterate. * Work directly with customers: Our users are 9-1-1 dispatchers and PSAP administrators. You'll visit dispatch centers, watch how they use the product, and use that context to drive what you build next. WHO WE’RE LOOKING FOR * Product thinker first, engineer second: You've owned products or features end-to-end — not just built what someone else decided. You think in terms of user problems and outcomes, not just technical solutions. * Comfortable across the stack: 4+ years of software engineering experience. You can build what needs building — frontend, backend, or both. You don't need to be the deepest technical expert on the team, but you're a capable, confident engineer. * High ownership: You see a problem, figure out the right thing to build, and drive it to completion. You take responsibility for outcomes, not just your code. * Customer empathy: You genuinely like understanding how people use software. You're energized by customer conversations, not drained by them. To learn more about what it's like to work at Aurelian, visit our About Us page and follow us on LinkedIn to stay up to date! We encourage you to apply even if you don’t meet every qualification listed above. We believe exceptional people come from many different backgrounds, and we’d rather connect with you than miss the opportunity. Come do the best work of your life and join us in shaping the future of critical technology that truly matters. FOR FULL-TIME ROLES, AURELIAN OFFERS A VARIETY OF BENEFITS, INCLUDING: * Comprehensive Medical, Dental, Vision & Life insurance * 401(k) * Unlimited PTO * Company-wide offsites * Equipment stipend * Relocation assistance * Daily delivered lunches (on us) * Office in Seattle * Start-up Equity