Senior Application Security Engineer

Constructor

OUR MISSION Constructor’s mission is to enable all educational organisations to provide high-quality digital education to 10x people with 10x efficiency.  With strong expertise in machine intelligence and data science, Constructor’s all-in-one platform for education and research addresses today’s pressing educational challenges: access inequality, tech clutter, and low engagement of students. PLEASE SEND YOUR RESUME IN ENGLISH ONLY. DUTIES AND RESPONSIBILITIES: * Strategic Roadmap Ownership: Define and drive a multi-year, outcome-based roadmap that aligns with global business goals and North Star metrics. * Market Intelligence: Lead comprehensive market research to identify emerging trends in AI and EdTech, ensuring our product strategy remains ahead of the curve. * Monetization & Pricing: Own the pricing strategy for international markets. Conduct analysis to determine price floors and ceilings, and optimize monetization models to maximize LTV. * Scientific & Data Leadership: Apply a scientific approach to product discovery. Analyze performance data to validate hypotheses and drive data-informed decision-making across the organization. * Stakeholder Management: Act as a key partner for the Leadership Team, delivering clear, data-backed insights and recommendations that influence company-wide strategy. * Team Mentorship: Lead, mentor, and scale a team of product managers, fostering a culture of accountability, growth, and high-quality PRD standards. * Cross-functional Collaboration: Serve as the primary point of contact for Engineering, Data Science, and Design teams to prioritize features and resolve technical/business trade-offs. QUALIFICATIONS AND EXPERIENCE: * 5+ years of experience as a Product Manager in software development (SaaS, EdTech, or AI-driven products). * Bachelor’s or Master’s degree in Computer Science, Data Science, or a related technical/scientific field. * Proven ability to manage products using complex data analysis and scientific research methodologies. * Expert knowledge of prioritization frameworks (e.g., RICE, WSJF) and experience building outcome-driven (not just feature-driven) roadmaps. * Strong track record of writing high-quality PRDs and managing sprints in a fast-paced, agile environment. * Experience leading cross-functional stakeholders and directly mentoring other product managers. * Fluent English with the ability to articulate technical concepts to non-technical stakeholders clearly. NICE TO HAVE: * Academic background in Business (MBA/BBA) or completion of advanced product strategy programs (e.g., Reforge, Kellogg, or similar). * Experience in building and scaling AI/ML-powered products. * Background in Science or experience with academic/research-focused software. * Experience managing products with millions of users across multiple geographical regions. WHAT WE OFFER * 💻 Choice of work equipment (e.g., laptop, monitor, etc.) * 🇬🇧 English classes (iTalki – $130 monthly) * ⏰ Flexible schedule (we usually work between 09:00/10:00 and 18:00/19:00 CET or EET) * 👶 Newborn bonus (€500 per child) * 🧠 Patent remuneration * 🌴 Paid leave * 🧑‍💻 Remote work in locations without our offices * Hybrid work in locations with offices (2 days in-office, 3 days remote) Constructor fosters equal opportunity for people of all backgrounds and identities. We are led by a gender-balanced board committed to building a diverse and inclusive organisation where everyone can become their best self. We do not discriminate based on age, disability, gender identity, sexual orientation, ethnicity, race, religion or belief, parental and family status, or other protected characteristics. We welcome applications from women, men and non-binary candidates of all ethnicities and socio-economic backgrounds. We encourage people belonging to underrepresented groups to apply.

Catawiki

At Catawiki, every day brings the extraordinary! Whether it’s Daniel Ricciardo’s Formula 1 Car, a Woolly Mammoth’s Skeleton, Lady Gaga's Jumpsuit or Usain Bolt’s running shoe, we encounter exceptional objects every day. We’re a one-of-a-kind marketplace for buying and selling special objects. Each week, more than 100,000 unique items are auctioned, all carefully curated by our passionate in-house experts. Having sold over 25 million unique objects, our mission is to become the world’s most popular destination for special objects. As a growing, diverse and sustainable scale-up, we proudly live by three core values. If these values resonate with you, we’d love to explore how you can join us. * Taking ownership and driving impact  * Being open to change and feedback * Being passionate about our mission and our customers.  What you will do Winning an object at Catawiki is an exciting moment, but the real excitement comes once the object has been delivered. Whether it’s a classic car, a watch, a painting or a rare stamp, they all need to arrive in the hands of the buyer, and only when the item is according to the description, will we proceed with the pay-out to the Seller. As simple as this sounds, there are many things that can go wrong in this process and with hundreds of thousands of objects in all shapes and sizes, we need to ensure that we help this process go smooth and easy. As we’re rapidly expanding, we’re looking for an experienced Senior Product Manager Shipping to strengthen our team of high performing Product Managers, Engineers, Designers and Data Scientists to scale our business.  As a Sr. PM Shipping at Catawiki, you will work with a multidisciplinary team within our Fulfilment vertical to: * Relentlessly focus on what’s best for our customers and our business. * Empower our Sellers and Buyers with the most convenient ways and processes to ship and receive their desired object. * Responsible for selecting new, and maintaining the relationships with existing, shipping partners. * Manage the process of giving and receiving feedback to the seller. * Understand and identify customer behaviour and needs through research and analysis. * Analyse, understand and share learnings from experimentation to build a strong knowledge base of the product. * Contribute to the overall Product Vision and Strategy for this core part of our value proposition. * Strong stakeholder management and partnership with the commercial organization in Catawiki and specifically the shipping operations team * Take ownership of anything related to shipping, the roadmap and prioritisation of new features and enhancements to existing features. Examples: * Working with various carriers across the world * Working with shipping aggregators * Find projects to make shipping costs more fair * Improve the quality of the overall shipping experience for buyers and sellers * Execute on that roadmap with clear expected outcomes and meticulous measurement. * Empower your team and cross-collaborate with other teams and stakeholders across the company to unlock their full potential. * Manage and work closely with your stakeholders: the commercial teams, Customer support teams, and the experts, to get the best ideas in and subsequently get everyone aligned for fast implementation. * Get. Stuff. Done.   Who you are  In addition to your demonstrable experience as a Product Manager in a fast growing online company, you also have: * A strong belief in Customer Centric product development. * A data driven approach; You base your decisions on facts rather than opinions. * Familiarity with a/b experimentation; You’re aware that valuable information comes from both positive and negative results through experimentation. * An interest and curiosity in the world of (online) auctions. * An intrinsic motivation to drive operational efficiency improvements and overcoming resistance to change. * Energy, a commercial focus, and a sense of urgency to everything you touch; You’re a self-motivated and results driven person who is not afraid to get their hands dirty to solve a problem. * Natural collaboration and communication skills, fluent English, and good in posing probing questions to quickly and fully understand what someone's talking about. * An agile and innovative mindset with the tenacity to thrive in a constantly changing environment plus the ability to deal with complexity and ambiguous situations. * An eagerness to learn; You seek continuous feedback and input. * 3+ years experience as a Product Manager ideally e-commerce focused. * Experience in the Shipping/ Logistics domain  WHY YOU'LL LOVE WORKING WITH US * Create a visible impact by working at scale in a global organisation serving millions of customers across 80+ categories. In our flat structure, every role has a broad scope and directly impacts both our customers and the business. * Learn and grow through our Learning & Development initiatives, including clear development plans and mentorship programmes to support your career progression. * A culture of connection defines us. We’re a passionate, diverse team of 800+ Catawikians representing 60+ nationalities. We foster an inclusive and queer-friendly environment where everyone is encouraged to bring their full self to work. * Celebrate life’s moments with us. You’ll receive a €100 Catavoucher when you join, a €50 Catavoucher on your birthday, and an extra day off each year to “Pursue Your Passion”. We also offer additional leave for key work anniversaries and important life events. Benefits may vary by location. OUR OFFICES AND WAY OF WORKING Our vibrant offices in Amsterdam and Lisbon are designed to inspire collaboration. Most Catawikians operate in a hybrid setup, combining office-based and remote work, with a minimum of two days per week in the office, unless a role is explicitly stated as fully remote or fully office-based. INTERESTED? Apply with an English CV and Cover Letter. By applying, you agree to Catawiki’s Applicant Privacy Policy. If you’re excited about this role but don’t meet every requirement, we still encourage you to apply anyway. You may be just the right candidate for this or other roles.

YLD

Location: Portugal (Remote anywhere in Portugal) Department: Engineering Employment Type: Permanent ABOUT YLD: Our goal is to help our clients keep moving forward. We work with them to build the skills and capabilities they need to stay ahead of the competition, and we know our success only happens when they succeed. We’re a team of curious, talented people, and we’re committed to making YLD a place where great people want to work, grow, and stay. We’re a remote-first consultancy specialising in software engineering, product design, and data. Our teams are based across London, Lisbon, and Porto, and we create digital solutions that continue to deliver value long after our work is done. ABOUT THE ROLE: As a Senior Data Engineer, you’ll be part of a client team building innovative products. We expect you to be curious, passionate, driven, and enthusiastic. You’ll be proficient at problem-solving, and crafting scalable, resilient, and fault-tolerant architectures. You’ll be an effective communicator and a team player. You and your team will move in a fast-paced engineering environment, achieving outstanding results and delivering exciting projects. ABOUT YOU: A YLD Senior Data Engineer is a highly skilled engineer who spans across data engineering and analytics engineering, and knows where the boundaries sit. You've built pipelines and transformation layers. You've inherited messy data projects and made them good. You have opinions about how data teams should work and the humility to adapt them to context. You have a real passion for the craft and are an active learner who gets excited by the variety that consultancy brings: different clients, different stacks, different problems. YOUR DAY-TO-DAY RESPONSIBILITIES WILL LOOK LIKE THIS: * Delivering data work on client engagements: pipelines, transformation layers, models, and the infrastructure around them * Adapting to different client contexts, legacy warehouse migrations, greenfield lakehouses, struggling transformation layers that need rescuing * Defining and evolving our internal standards for data work: testing, documentation, project structure, code review * Mentoring and growing data engineers across the company * Showing up for client team moments (internal speakers, learning sessions, social events) to build strong working relationships. * Contributing to proposals and helping shape engagements during the sales process * Representing YLD externally through writing, speaking, and contributing to the wider data community. YOU’LL HAVE THE FOLLOWING SKILLS AND EXPERIENCE: * SQL as engineering: You write SQL that's reviewable, testable, and performs at scale. You understand query planning, engine quirks, and how materialisation choices affect cost and performance * Python for data: You write typed, testable Python for pipelines and tooling. You've built and maintained production data systems, not just notebooks * Data modelling: You've made deliberate choices between dimensional, Data Vault, normalised, and denormalised designs. You can explain those trade-offs in terms of flexibility, query performance, and maintainability * Transformation architecture: You design transformations that are idempotent, incremental, and dependency-aware. You think in DAGs, not scripts * Pipeline design: You understand batch, streaming, and micro-batch trade-offs. You consider latency, complexity, cost, and reprocessability. And choose the right approach for the problem * Data testing: You write tests as code, schema contracts, assertions, and transformation logic. You know what to catch at build time vs. defer to observability * Data observability: You treat data reliability like site reliability. Measurable indicators, alerting, incident response, and root cause analysis * CI/CD for data: You version, test, and deploy pipelines like software. Environment promotion, rollback strategies, and infrastructure as code for reproducible environments * Data governance: You've implemented lineage, cataloguing, sensitive data classification, or access control. Not just built pipelines, but made them auditable and secure * Cost-conscious: You've optimised warehouse spend, storage strategies, or job efficiency. You treat compute as a resource to manage, not ignore * Platform fluency: You've worked across the modern stack. Orchestration (Airflow, Dagster), warehouses (Snowflake, BigQuery, Databricks), ingestion (Fivetran, Airbyte, custom), and transformation (dbt, Spark) * Cross-functional fluency: You translate engineering constraints into business terms and negotiate realistic commitments YOU’LL BE: * Self-motivated and proactive * Comfortable with ambiguity, experimentation, and iteration * Collaborative by default. You work well in teams and across teams * Analytical and detail-oriented in your approach to problems * Comfortable context-switching across clients, stacks, and problem types * Willing to shape engagements, not just deliver them: contributing to proposals, scoping, and client relationships * Active in the wider data community: writing, speaking, or open-source contribution * Genuinely committed to diversity, equity, and inclusion   Benefits you'll get: * Company Private Health care * Enhanced fully paid maternity and paternity leave for up to 6 months * Company’s Pension Scheme (UK Only) * 25 days annual holiday (excluding Public Holidays) * £2000/€2000 annual allowance for Training/Conferences * £300/€300 annual allowance for additional hardware * Wellbeing & Performance Support via Oli including Therapy and Coaching * Discretionary Bonus (depending on Company performance and results) * Company laptop * Generous referral schemes OUR TYPICAL RECRUITMENT PROCESS LOOKS LIKE THIS: * 1st Interview with someone from the Talent team (30-45 Minutes) * Technical Interview with our Senior Developers (90 Minutes) * Call with the Head of Engineering (60 Minutes) Get a glimpse of what it's like working at YLD! 🤳 Check out our LinkedIn page WE LIVE AND BREATHE OUR VALUES, AND KNOW YOU WILL TOO: * Growing every day * Including everyone * Relationships built on honesty and ethics * Inspiring solutions * Winning together We’re an equal-opportunity employer and value diversity in all its forms. We do not discriminate based on race, religion, colour, national origin, gender, sexual orientation, pregnancy or maternity, age, marital status, or disability. We also offer a remote-first working environment, with flexible working and work–life balance as standard for all employees.