Decision Scientist in Amsterdam

About BlockTech BlockTech is a fast-paced algorithmic trading firm facilitating global cryptocurrency derivatives and spot trading while expanding into new markets. As we continue to grow rapidly, we are looking for a Senior Software Engineer to take technical ownership of our Core systems and help shape how they evolve through our scale-up phase. This is a role for an engineer who has already built and operated correctness-critical systems at scale and who wants their technical decisions to set direction, not just follow it. What will you do? You will own the systems that keep our trading operation accurate at every level — positions, PnL, instruments, hedging, and the data flowing between them. Across exchanges and asset classes, your work determines whether the numbers our traders and risk team rely on are correct. As a senior engineer, you will also set the technical standards the rest of the team builds against. You will: Own the books. Maintain and evolve our position, trade, and PnL systems so they remain accurate across every venue. Architect the platform that supports trading. Design services that handle real-time exchange flow with the throughput and reliability our quoting and hedging depend on, making the structural calls that keep them fast and correct under load. Own the data flows. Operate and harden the public and private pipelines bringing market prices, account state, and trade events into our systems in real time. Lead venue integrations end-to-end. Deliver exchange and prime-broker integrations across protocol, account model, settlement, reconciliation, and surveillance and define the patterns we reuse for the next one. Model the instrument universe. Own the systems describing every tradable instrument - lifecycle, expiry, margin, RFQs, fast-path quoting - where both correctness and latency matter. Build self-healing systems. Design the detection and repair flows that identify position discrepancies and correct them automatically. Own hedging inf

This is Adyen Adyen provides payments, data, and financial products in a single solution for customers like Meta, Uber, H&M, and Microsoft - making us the financial technology platform of choice. At Adyen, everything we do is engineered for ambition. For our teams, we create an environment with opportunities for our people to succeed, backed by the culture and support to ensure they are enabled to truly own their careers. We are motivated individuals who tackle unique technical challenges at scale and solve them as a team. Together, we deliver innovative and ethical solutions that help businesses achieve their ambitions faster. Senior Procurement Manager - Data Centers We are looking for a fast learner and hands-on Procurement Manager to join Adyen's Procurement team, a dynamic global team within our Finance function. The goal of the team is to contribute to Adyen’s 10x ambition through sustainable commercial decisions, risk mitigation, contract and vendor management, ultimately empowering stakeholders to deliver their strategies. You will work in the data center category, alongside another category manager and a supply chain manager, but as Adyen grows, and the Procurement team with it, this scope might change and increase in the future. What you'll do Act as a business partner to stakeholders such as Infrastructure, Data Center Engineering, Legal and Sustainability, delivering value and enabling their strategies. Lead and initiate commercial negotiations, including but not limited to contract renewals and setting up new agreements. Be responsible for the supplier selection process, RFx and screening. Work with the Infrastructure team on roadmaps, including our DC expansion plans. Do vendor monitoring on performance and contractual agreements. Be tracking and reporting on industry trends. Build and maintain relationships with key vendors. Who you are 7+ years of relevant experience, including category management or sourcing. Deep knowledge and exper