The role

Nebius is looking for a Senior Software Engineer in Hardware Infrastructure team. You’re welcome to work in our office in Amsterdam.

Hardware Infrastructure team designs, develops and supports systems involved in the data center lifecycle.

Your responsibilities will include:

Design and develop services that automate work with a large server fleet

We expect you to have:

• 5+ years of professional software engineering experience
• Excellent knowledge of Python or Golang, or you are ready to quickly switch to these programming languages
• Ability to write reliable code and dig into complex problems
• Strong interest in being engaged in DevOps processes
• Working proficiency in English

It will be an added bonus if you have: 

• Solid understanding of modern server architecture and its components
• Good knowledge of computer networks
• Experience designing, developing and running high-load distributed systems

About the Role
We are looking for a QA Engineer specializing in servers and server components to ensure quality, performance, reliability, and compatibility for purpose of modern server platforms.
In this role, you will work closely with hardware, firmware, system, services, and application teams to validate server architectures and components across the full product lifecycle - from early prototypes to production deployment.

Responsibilities
System & Component Validation
• Qualify complete server system architecture, including compute, memory, storage, networking, and accelerators
• Test and validate interactions between server components: CPU, DRAM, NVMe devices, Network interface cards (NICs), GPUs / accelerators.
• Perform individual component testing to verify performance, stability, and reliability prior to and after system integration
• Execute system-level validation under different configurations, workloads, and use cases
• Evaluate benchmark results against: technical specifications, business and application requirements, historical baselines and previous generations
• Identify performance regressions, instability, and reliability issues under sustained load and stress conditions
• Ensure hardware components and firmware meet business needs, performance goals, and specifications

Firmware, BIOS & BMC Validation
• Test and validate firmware for BMC / BIOS / FPGA
• Validate BMC functionality including IPMI/Redfish, sensors, power, thermal management, and logging
• Perform firmware upgrade, downgrade, and regression testing
• Assess firmware impact on performance, stability, and reliability across different hardware configurations
• Prepare and maintain test cases, checklists, and test reports
• Participate in platform validation for manufacturing and production readiness

Required
• Strong understanding of server system architecture
• In-depth knowledge of server components and their operation:
• Experience with component-level and system-level testing
• Understanding of BIOS/UEFI and BMC fundamentals
• Practical experience with Linux (command line, system tools, logs)
• Scripting skills (e.g. Bash, Python) for test and benchmark automation
• Ability to analyze performance data and identify regressions or anomalies
• Strong debugging, documentation, and communication skills

Nice to Have
• Experience with data center or server-grade hardware platforms
• Familiarity with common bench-marking and stress tools
• Understanding of PCIe topology and system interconnects
• Experience with reliability, power, and thermal testing
• Exposure to production, manufacturing, or fleet-scale validation
• Experience working with early hardware prototypes

The Role

Nebius is looking for a Senior Software Engineer to join the Hardware Infrastructure Observability team. You're welcome to work from our office in Amsterdam. We build and run low-level monitoring for servers and data center engineering systems to ensure reliability at scale. We also design and operate maintenance and remediation systems that enable safe, predictable fleet-wide changes and keep the infrastructure healthy.

Key Responsibilities:

• Design and develop services and agents that provide deep visibility into a large server fleet and DC engineering systems
• Evolve our metrics/aggregation/alerting pipelines and improve signals quality
• Build maintenance workflows and automation that keep fleets healthy
• Investigate incidents hands-on (including on-host debugging) and drive root-cause fixes
• Collaborate with hardware, networking, and DC operations to improve reliability
  

We expect you to have:

• 5+ years of professional software engineering experience
• Excellent knowledge of Python and Golang or you are ready to quickly switch to these programming languages
• Strong Linux fundamentals
• Ability to write reliable code and and dig into complex problems
• Working proficiency in English

It will be an added bonus if you have: 

• Solid understanding of modern server architecture, and its components
• Experience with metrics/monitoring/alerting Prometheus-compatible stacks (like VictoriaMetrics)
• Good knowledge of computer networks
• Experience designing, developing, and running high-load distributed systems

We conduct coding interviews as part of the process.

Our Linux engineering team ensures that our critical trading servers and infrastructure operate efficiently and reliably across the globe. In a highly customized, bare-metal environment powered by proprietary tools and technology, you’ll help design and implement cutting-edge solutions that enable scalable technological evolution while maintaining peak performance together with speed and precision.

What you'll do

• Designing, deploying, and managing the lifecycle of a large-scale fleet of Linux servers across multiple data centers, ensuring reliability, performance, and scalability.
• Architecting, building, and maintaining systems that drive efficiency and support Optiver’s evolving technology stack.
• Ensuring system reliability by swiftly resolving incidents and optimizing performance to meet trading demands, even during extreme market conditions.
• Researching and implementing new technologies or building enhanced in-house solutions to improve performance and system stability.
• Bridging the gap between hardware and software to ensure seamless interaction and integration.
• Optimizing system and kernel performance, including CPU affinity, NUMA balancing, HugePages, IRQ tuning, and other low-level configurations.
• Developing and maintaining automation tools using Python to enhance system efficiency.
• Monitoring system health and performance using observability tools such as Prometheus, Grafana, and Alertmanager.
• Managing system provisioning and infrastructure deployment using Infrastructure-as-Code tools like Ansible and/or Terraform.
• Joining our rotating support and on-call roster to facilitate global trading operations.

Who you are

• Experience in Linux engineering, debugging, administration, and OS system provisioning

• A solid understanding of networking fundamentals, including TCP/IP, DNS, TCP/UDP/multicast, and packet analysis.

• Hands-on experience with system/network tools such as EBPF, tcpdump, strace, ntp/ptp, lsof, nc.

• Experience with performance tuning at both the kernel and hardware level, including CPU pinning, cache optimizations, and BIOS/UEFI tuning.

• Experience with Linux security hardening techniques.

• Experience managing SAN storages.

• Familiarity with CI/CD pipelines, version control systems (Git), and PR-based workflows.

• Strong experience with monitoring and alerting tools like Elastic, Prometheus, Grafana, and Alert Manager.

• Proficiency in Python for automating operational tasks and system administration.

• Ability to manage large projects, work collaboratively in a team, and communicate effectively to drive technical improvements.

• Willingness to learn new technologies, navigate frequent change, and contribute to a high-performance engineering environment.

No prior trading or financial experience is needed – our onboarding program will kick-start your career at Optiver and support you in gaining all the relevant knowledge about our business.

Who we are
At Optiver, our mission is to constantly improve the market by injecting liquidity, providing accurate pricing, increasing transparency and acting as a stabilizing force no matter the market conditions. With a focus on continuous improvement, we participate in the safeguarding of healthy and efficient markets for everyone who participates. As one of the largest market making institutions, we are a trusted partner of 70+ exchanges across the globe.

What you'll get
You’ll join a culture of collaboration and excellence, where you’ll be surrounded by curious thinkers and creative problem solvers. Motivated by a passion for continuous improvement, you’ll thrive in a supportive, high-performing environment alongside talented colleagues, working collectively to tackle the toughest problems in the financial markets.

In addition, you’ll receive:

• A performance-based bonus structure, enabling all of our employees to benefit from our global profit pool.
• The opportunity to work alongside best-in-class professionals from over 50 different countries.
• 25 paid vacation days in your first year, increasing to 30 from your second year onwards.
• Training opportunities, discounts on health insurance, and fully paid first-class commuting expenses.
• Extensive office perks, including breakfast, lunch and dinner, world-class barista coffee, in-house physio and chair massages, organized sports and leisure activities, and Friday afternoon drinks.
• Training and continuous learning opportunities, including access to conferences and tech events.
  
  

How to apply
Apply directly via the form below. If you have any questions feel free to contact our Recruitment team via our recruitment inquiry form.

Please note:

• We do not require any assistance from third-parties including agencies in the recruitment of this role
• We cannot accept applications via email
  
  

Diversity statement
Optiver is committed to diversity and inclusion.

Our Linux engineering team ensures that our critical trading servers and infrastructure operate efficiently and reliably across the globe. In a highly customized, bare-metal environment powered by proprietary tools and technology, you’ll help design and implement cutting-edge solutions that enable scalable technological evolution while maintaining peak performance together with speed and precision.

What you'll do

• Designing, deploying, and managing the lifecycle of a large-scale fleet of Linux servers across multiple data centers, ensuring reliability, performance, and scalability.
• Architecting, building, and maintaining systems that drive efficiency and support Optiver’s evolving technology stack.
• Ensuring system reliability by swiftly resolving incidents and optimizing performance to meet trading demands, even during extreme market conditions.
• Researching and implementing new technologies or building enhanced in-house solutions to improve performance and system stability.
• Bridging the gap between hardware and software to ensure seamless interaction and integration.
• Optimizing system and kernel performance, including CPU affinity, NUMA balancing, HugePages, IRQ tuning, and other low-level configurations.
• Developing and maintaining automation tools using Python to enhance system efficiency.
• Monitoring system health and performance using observability tools such as Prometheus, Grafana, and Alertmanager.
• Managing system provisioning and infrastructure deployment using Infrastructure-as-Code tools like Ansible and/or Terraform.
• Joining our rotating support and on-call roster to facilitate global trading operations.

Who you are

• Experience in Linux engineering, debugging, administration, and OS system provisioning

• A solid understanding of networking fundamentals, including TCP/IP, DNS, TCP/UDP/multicast, and packet analysis.

• Hands-on experience with system/network tools such as EBPF, tcpdump, strace, ntp/ptp, lsof, nc.

• Experience with performance tuning at both the kernel and hardware level, including CPU pinning, cache optimizations, and BIOS/UEFI tuning.

• Experience with Linux security hardening techniques.

• Experience managing SAN storages.

• Familiarity with CI/CD pipelines, version control systems (Git), and PR-based workflows.

• Strong experience with monitoring and alerting tools like Elastic, Prometheus, Grafana, and Alert Manager.

• Proficiency in Python for automating operational tasks and system administration.

• Ability to manage large projects, work collaboratively in a team, and communicate effectively to drive technical improvements.

• Willingness to learn new technologies, navigate frequent change, and contribute to a high-performance engineering environment.

No prior trading or financial experience is needed – our onboarding program will kick-start your career at Optiver and support you in gaining all the relevant knowledge about our business.

Who we are
At Optiver, our mission is to constantly improve the market by injecting liquidity, providing accurate pricing, increasing transparency and acting as a stabilizing force no matter the market conditions. With a focus on continuous improvement, we participate in the safeguarding of healthy and efficient markets for everyone who participates. As one of the largest market making institutions, we are a trusted partner of 70+ exchanges across the globe.

What you'll get
You’ll join a culture of collaboration and excellence, where you’ll be surrounded by curious thinkers and creative problem solvers. Motivated by a passion for continuous improvement, you’ll thrive in a supportive, high-performing environment alongside talented colleagues, working collectively to tackle the toughest problems in the financial markets.

In addition, you’ll receive:

• A performance-based bonus structure, enabling all of our employees to benefit from our global profit pool.
• The opportunity to work alongside best-in-class professionals from over 50 different countries.
• 25 paid vacation days in your first year, increasing to 30 from your second year onwards.
• Training opportunities, discounts on health insurance, and fully paid first-class commuting expenses.
• Extensive office perks, including breakfast, lunch and dinner, world-class barista coffee, in-house physio and chair massages, organized sports and leisure activities, and Friday afternoon drinks.
• Training and continuous learning opportunities, including access to conferences and tech events.
  
  

How to apply
Apply directly via the form below. If you have any questions feel free to contact our Recruitment team via our recruitment inquiry form.

Please note:

• We do not require any assistance from third-parties including agencies in the recruitment of this role
• We cannot accept applications via email
  
  

Diversity statement
Optiver is committed to diversity and inclusion.

In a nutshell

We are looking for a Health & Safety Manager to re-design our safety capability from the ground up. This is not a role for a policy-checker; it is for an architect who views safety as an integral part of operational excellence. You will define the strategy, set the standards, and ensure that safety is embedded into every workflow across our Fulfillment Centers, Distribution Hubs, and Fleet. Your work does not stop there. Creating a safety culture requires the ability to move our workforce and change their mindset. You start with a blank sheet and the responsibility to create a program that scales.

What you’ll do

• Design the framework: Take full ownership of building Picnic’s safety capability. You will define the standards, processes, and tools from scratch.

• Integrate operations: Ensure safety is not a separate layer but an integrated part of how we work. You will bridge the gap between site-level execution and central strategy.

• Develop the program: Create the training modules, hardware standards, and operational protocols that enable leads in our Fulfillment Centers, Hubs, and Fleet to manage their own safety performance.

• Define metrics: Establish clear KPIs and reporting structures to measure safety performance anspeed drive continuous improvement.

• Lead stakeholders: Navigate different parts of the business to gain support for your plans, ensuring safety initiatives align with operational reality and broader business goals.

• Mitigate risk: Identify systemic operational risks and implement scalable technical and procedural solutions to eliminate them.

• Solve for scale: Implement scalable solutions that remain effective as our logistics network and fleet operations evolve, focusing on sustainable operational excellence.

About you

• Master’s degree in a relevant technical or operational field

• 5-8 years of experience in an operational safety environment.

• Direct experience in high-volume environments like logistics, manufacturing, or supply chain

• A proven track record of "zero-to-one" builds; you have designed and launched programs or capabilities from scratch

• A pragmatic mindset that prioritizes functional processes and technical controls over thick policy manuals

• Strong analytical skills and a data-driven approach to problem-solving and risk management 

• The maturity to influence stakeholders at all levels and gain broad support for new ways of working

• Fluency in English

Picnic Perks

🥗Fresh Lunch, coffee, and snacks 

Our offices are equipped with fully-fledged coffee bars and a kitchen and chefs. They prepare delicious fresh and warm lunches every day so you can keep your energy up.

🚵🏼Health insurance discount & bike plan

We have a partnership with CZ (a health insurance provider). Picnic employees get a discount on CZ insurance packages between 5% and 15%. Furthermore, through our partnership with Lease a Bike, you can rent-to-own a new (e)bike at a discounted rate

🌍Relocation

If you’re moving from another country to join Picnic we make it as smooth as possible for you. We’ll cover your flight costs for you and your partner and kids, your first month's rent and moving costs (up to €2000), and help you with the 30% tax ruling setup and application. 

✍🏼Learning & development 

You’ll get ample opportunity to work on yourself at Picnic. We offer personal development through Lepaya courses, Academy trainings, and more. Interested in improving your mental wellbeing? Through OpenUp you get free access to trained psychologists and many courses. 

All the rest 

At Picnic you get 25 holidays, we cover your travel expenses and offer a pension plan. And your phone and laptop are on us, as well.

In a nutshell

At Picnic we have a fleet of 1800 electric vehicles (EPV’s as we call them) bring groceries to 45.000 families each day. As a Last Mile Operator at Picnic you have a direct impact in making sure this is possible. From managing changes in our last mile supply chain to working on improvement projects to make our operations as efficient as possible, you will make a real impact everyday at Picnic!

Want to be part of the team making sure our customers receive their groceries as seamlessly as possible?

The Tricks of the Trade

• Trusted partner: You will become an expert in Picnic’s Fleet Operations and be the go to person for answers and advice regarding our Fleet of EPVs.

• Administration & Finance: You will take ownership of vehicle records, keeping everything sharp and organised while ensuring every quote and invoice is spot-on.

• Collaboration: You connect our last-mile locations with service partners, ensuring smooth and effective cooperation.

• Stakeholder management: You will work closely with internal teams and our service partners to ensure our vehicles are available when they are needed.

• Continuous Improvement: You will help to drive operational excellence at Picnic by developing and implementing last-mile operations improvement projects.

About you…

• You have a Bachelor/HBO thinking level

• You are fluent in Dutch and English

• You are in possession of a category B driving license

• You have experience with Excel, Google Sheets, and PowerPoint

• You have experience or are interested in the automotive industry

Picnic Perks

🥗 Fresh lunch, coffee, and snacks
At the office, we have a coffee bar with in-house baristas, chefs who prepare a delicious fresh lunch every day, and snacks and fruit to keep your energy up.

🚵🏼 Discount on health insurance & bike plan
We partner with health insurer CZ, giving Picnic employees a 5% to 15% discount on CZ insurance packages. You can also lease a new (e-)bike at a reduced rate through our partnership with Lease a Bike, with the option to purchase it later.

✍🏼 Learning & Development
At Picnic, you’ll have plenty of opportunities to grow. We offer personal development programs, including a Leadership Bootcamp. Prefer to focus on your mental well-being? Through OpenUp, you get free access to professional psychologists and various training programs.

Additionally
At Picnic, you receive 25 vacation days, travel expense reimbursement, and a pension plan. We also provide a phone and a laptop!

RDQ127R176

At Databricks, we are passionate about enabling data teams to solve the world's toughest problems — from making the next mode of transportation a reality to accelerating the development of medical breakthroughs. We do this by building and running the world's best data and AI infrastructure platform so our customers can use deep data insights to improve their business. Founded by engineers — and customer obsessed — we leap at every opportunity to tackle technical challenges, from designing next-gen UI/UX for interfacing with data to scaling our services and infrastructure across millions of virtual machines. And we're only getting started.

Our engineering teams build highly technical products that fulfill real, important needs in the world. We develop and operate one of the largest scale software platforms. The fleet consists of millions of virtual machines, generating terabytes of logs and processing exabytes of data per day. At our scale, we regularly observe cloud hardware, network, and operating system faults, and our software must gracefully shield our customers from any of the above.

Unity Catalog is our platform native unified and open governance for data and AI. It eliminate silos, simplify governance and accelerate insights at scale. We are looking for a Senior Staff Software Engineer to come tech lead Unity Catalog Runtime Enforcement. We build and harden the runtime enforcement layer for Unity Catalog, ensuring secure, consistent authorization and data access across Databricks compute, engines, and clouds. This reduces incidents and simplifies customer choices by unifying enforcement semantics. 

The impact you will have:

• Lead and grow and engineering team delivering runtime enforcement outcomes in a high-severity, cross-org domain; establish scope, SLAs, and phased roadmaps.
• Establish single-source-of-truth scope, operating model, and durable mechanisms for enforcement.
• Lead multi-year, multi-team initiatives that shape how Databricks enforces Unity Catalog at runtime across compute types and engines.
• Introduce tools to allow greater automation and operability of services.
• Use your deep experience to help prevent and investigate production issues.
• Plan and lead complicated technical projects that work with several teams within the company.
• Contribute as a technical team lead by mentoring others, lead sprint planning, delegating work and assignments to team members and participate in project planning.

What we look for:

• 15+ years industry experience building and supporting large-scale distributed systems.
• Comfortable working towards a multi-year vision with incremental deliverables.
• Extensive experience building and maintaining distributed systems.
• Security first mindset.
• Cross-org leadership in ambiguous, incident-heavy environments; disciplined rollout and ops maturity.
• Motivated by delivering customer value and impact.
• Experience driving company initiatives towards customer satisfaction.
• BS/MS/PhD in Computer Science or related majors, or equivalent experience.
•  

P-1127

At Databricks, we are obsessed with enabling data teams to solve the world's toughest problems, from security threat detection to cancer drug development. We do this by building and running the world's best data and AI infrastructure platform, so our customers can focus on the high value challenges that are central to their own missions.

Our engineering teams build highly technical products that fulfill real, important needs in the world. We develop and operate one of the largest scale software platforms. The fleet consists of millions of virtual machines, generating terabytes of logs and processing exabytes of data per day. At our scale, we regularly observe cloud hardware, network, and operating system faults, and our software must gracefully shield our customers from any of the above.

The Delta DML team owns the core write-path operations for Delta Lake, the open-source storage layer behind the Databricks Lakehouse. Our mission is to deliver industry-leading performance and a seamless user experience at massive scale, with most data written in Databricks flowing through our platform.  We drive performance innovations like Low Shuffle Merge and Deletion Vectors and actively contribute to open source efforts to unify Delta and Iceberg formats.

We are seeking a highly skilled and experienced Senior Staff Software Engineer to join our backend team. In this role, you will be instrumental in designing, developing, and maintaining robust backend systems that power Databricks workspaces. You will build the next-generation platform for serving workspace assets, ensuring high QPS, low latency, reliable, and performant systems, proactively addressing the future growth challenges. Additionally, as a senior member of the team, you will provide technical leadership, mentorship, and guidance to junior engineers, contributing to the overall improvement of team coding practices and system designs.

The Impact you will have:

• Solve real business needs at large scale by applying your software engineering.
• Low level systems debugging, performance measurement, and optimization on large production clusters.
• Build architecture design, influence product roadmap, and take ownership and responsibility over new projects.
• Introduce tools to allow greater automation and operability of services.
• Use your deep experience to help prevent and investigate production issues.
• Plan and lead complicated technical projects that work with several teams within the company.
• Contribute as a technical team lead by mentoring others, lead sprint planning, delegating work and assignments to team members and participate in project planning.

What we look for:

• 15+ years industry experience building and supporting large-scale distributed systems.
• Comfortable working towards a multi-year vision with incremental deliverables.
• Motivated by delivering customer value and impact.
• Strong foundation in algorithms and data structures and their real-world use cases.
• Experience driving company initiatives towards customer satisfaction.
• BS/MS/PhD in Computer Science or related majors, or equivalent experience.