Senior Distributed Systems Engineer - Platform Engineering

RTB House

Location: Poland (Remote/Flexible) We Are:  RTB House is a global company that provides state-of-the-art marketing technologies for top brands and agencies worldwide. Its proprietary ad-buying engine is the first in the world to be powered entirely by Deep Learning algorithms, enabling advertisers to generate outstanding results and reach their goals at every stage of the funnel.  We are looking for Senior Engineers to support our Bidding Platform organization which is the core of the RTB business, processing over 20 million requests per second to participate in real-time auctions and display advertisements to customers from 90+ countries. If you want to work on technically complex and demanding solutions, this is the opportunity for you! Our Senior Engineers are experts who combine deep technical expertise with a strong sense of ownership, and they take on Tech Lead roles in complex, cross-team projects. You will: * Design and lead implementation of system changes that deliver high performance, scalability and observability for displaying and tracking ads world wide. Develop tools and optimizations to drive measurable improvements in critical user performance metrics. * Implement, test, deploy, monitor and maintain (in all aspects, including setting up environment, writing configuration code, monitor production) HTTP / gRPC services and batch jobs in Java and Python, ensuring adherence to the high engineering standards. * Provide hands-on technical leadership: solving complex system challenges, participating in planning and scoping of projects, and ensuring the implementation of the highest coding standards through participation in code reviews. Requirements: * Excellent understanding of how complex IT systems work - from the hardware level, through software, to algorithms. * Very good knowledge of fundamental Internet protocols and technologies (DNS, HTTP, cookies and others). * Good knowledge of basic methods of creating concurrent programs and distributed systems (from thread level to geo-distributed clusters level). * Practical ability to observe, monitor and analyse the operation of production systems (and draw valuable conclusions from it). * The ability to critically analyze the solutions created in terms of performance (from estimating the theoretical performance of the designed systems to detecting and removing actual performance problems in production). * General knowledge of issues (typical problems and methods of solving them) in the areas of 'high scalability' and 'high availability'. * C1 level in English and Polish. Nice to have: * Experience in the AdTech/Real Time Bidding space. * Experience contributing to Real User Monitoring (RUM) systems. Selected technologies used:  * Java, Python * Aerospike, Memcached * Google Cloud Platform, BigQuery, MinIO * Kafka, Clickhouse * PostgreSQL * Elasticsearch * Kubernetes, Prometheus * Jenkins, Graphite We Offer: * Projects focused on extreme performance and high code quality – clean code and solid code reviews are our standard. * Collaboration within an interdisciplinary, self-sufficient team (including DevOps, database experts, backend developers, product designers, and QA engineers). * Access to modern technologies and the opportunity to apply them in large-scale, high-impact projects. * Cooperation based on B2B contract. * You can cooperate 100 % remotely or choose one of our office spaces in Warsaw or Cracow. Apply now You don't need to tick every box to apply. If you are passionate about software engineering, send us your CV, and we'll review it.

Qube Research & Technologies

Qube Research & Technologies (QRT) is a global quantitative and systematic investment manager, operating in all liquid asset classes across the world. We are a technology- and data-driven group implementing a scientific approach to investing. Combining data, research, technology, and trading expertise has shaped our collaborative mindset, which enables us to solve the most complex challenges. QRT’s culture of innovation continuously drives our ambition to deliver high-quality returns for our investors. This role sits at the intersection of distributed systems, platform engineering, and high-performance computing. You will build and operate the foundational services that quantitative researchers rely on every day, including workload orchestration, scheduling, security, observability, and platform tooling. Your Future Role Within QRT: * Design, build, and operate distributed services that manage compute workloads and data access across large-scale infrastructure * Develop platform APIs and tooling that improve the productivity of quantitative researchers * Improve the reliability, scalability, and performance of compute-intensive research workflows * Build solutions for scheduling, resource management, observability, and security * Partner closely with researchers and infrastructure teams to translate complex requirements into scalable platform capabilities * Take ownership of systems end-to-end, from design and implementation through production operation Your Present Skill Set: * Bachelor's, Master's, or PhD degree in Computer Science or a related field, or equivalent practical experience * 5+ years of experience building and operating large-scale distributed systems in production environments * Strong proficiency in C++, Java, Rust, Go, or other systems programming languages * Deep understanding of distributed systems, concurrency, performance optimization, reliability, and fault tolerance * Experience designing and operating services, platforms, or infrastructure used by other engineers Nice to have: * Experience with internal developer platforms, cloud infrastructure, orchestration systems, or HPC environments * Familiarity with GPU-accelerated workloads and modern ML frameworks such as PyTorch or TensorFlow * Experience supporting researchers, data scientists, or other highly technical users * Exposure to quantitative finance or large-scale data-intensive environments   QRT is an equal opportunity employer. We welcome diversity as essential to our success. QRT empowers employees to work openly and respectfully to achieve collective success. In addition to professional achievement, we are offering initiatives and programs to enable employees achieve a healthy work-life balance.

GotPhoto

ABOUT US At GotPhoto, we are freeing photographers to be more successful. Through our platforms GotPhoto.com and fotograf.de, we help professional photographers simplify and transform the way they work — from photo management and client communication to ordering and payment processing. Our end-to-end workflow and e-commerce solution gives photographers more time to focus on what matters most: being behind the lens. Since 2012, we’ve built a sustainable and profitable business driven by entrepreneurial spirit, innovation, and a deep understanding of photographers’ everyday challenges. Today, thousands of photographers trust our software , creating their own success stories along the way. As the leading e-commerce engine for professional volume photographers and a business backed by EQT, one of the world’s leading private equity firms, we’re powered by a team of 150+ talented and international people building technology that simplifies photographers’ everyday work and helps them focus on capturing meaningful moments. Join us on our journey to empower photographers like never before. YOUR ROLE Do you want to build the platform that helps engineering teams move faster, ship safer, and scale smarter? You'll work at the intersection of Platform Engineering, SRE, Developer Experience, and AI Enablement—building the infrastructure, tooling, and guardrails that power a global SaaS platform. WHAT YOU'LL DO BUILD AND EVOLVE OUR PLATFORM * Design, build, and operate the cloud-native platform that supports our engineering organization. * Create reusable platform services, self-service capabilities, and infrastructure standards that help product teams deliver software faster and more reliably. ELEVATE DEVELOPER EXPERIENCE * Reduce friction across the software development lifecycle. * Build and improve CI/CD pipelines, internal tooling, automation, and developer workflows that increase productivity and accelerate delivery. * Partner with engineering teams to continuously improve the developer experience. DRIVE RELIABILITY & OBSERVABILITY * Improve the reliability and performance of our systems. * Define and maintain SLAs, SLOs, and observability standards using metrics, logs, tracing, and monitoring. * Support incident response, root-cause analysis, and continuous platform improvements. ENABLE AI-NATIVE ENGINEERING * Help shape the next generation of developer platforms. * Build infrastructure and workflows that support: * AI coding assistants such as GitHub Copilot, Cursor, and future AI development tools * Agentic AI infrastructure including MCP servers, tool-calling backends, and secure execution environments * AI workload observability including LLM tracing, latency, usage, and cost monitoring * Safe AI deployment workflows with model versioning, experimentation, rollbacks, and policy-driven guardrails CHAMPION SECURITY & PLATFORM EXCELLENCE * Embed security, compliance, and Infrastructure-as-Code best practices into engineering workflows. * Design scalable AWS architectures and automation that keep our platform secure, reliable, and ready for growth. LEAD THROUGH INFLUENCE * Share knowledge, mentor engineers, and drive cross-functional platform initiatives. * Help establish engineering best practices and foster a culture of continuous improvement. WHAT YOU BRING EXPERIENCE * 5+ years in Platform Engineering, SRE, Developer Experience, or a similar field * Experience building and operating production systems in AWS * Strong Infrastructure-as-Code and automation background TECHNICAL SKILLS * Cloud & Platform Technologies: You are experienced with AWS, Kubernetes, Terraform, Helm, and modern cloud-native infrastructure patterns. * Observability & Reliability: You know how to design systems that are observable, measurable, and resilient using tools such as OpenTelemetry, Prometheus, and Grafana. * Architecture & Systems Thinking: You understand distributed systems, event-driven architectures, authentication and authorization models, infrastructure automation, and modern deployment strategies. * Developer Enablement: You enjoy building tools and platforms that help other engineers be more productive. WHAT MAKES YOU SUCCESSFUL * Platform-as-a-Product Mindset: You think of internal platforms as products and care deeply about the developer experience. * Incremental Builder: You prefer iterative improvements, automation, and sustainable scaling over big-bang solutions. * Collaborative Partner: You enjoy working across teams, building alignment, and enabling others to succeed. * Humble Expert: You bring expertise, curiosity, and a willingness to learn from others. BONUS POINTS * Experience building Internal Developer Platforms (IDPs) * Experience with AI-assisted software development * Experience with MCP (Model Context Protocol) * Experience supporting AI/ML workloads in production * Experience in high-growth SaaS environments WHY YOU’LL LOVE LIFE AT GOTPHOTO * Best of Both Worlds: We live and breathe a flexible hybrid model. Our beautiful office at Hausvogteiplatz is our vibrant Berlin hub for collaboration, but you have the freedom to leverage the setup that works best for you. * Work from (Almost) Anywhere: We believe in flexibility that respects your lifestyle. Once you have completed your probation, you have the option to work remotely from within Europe for up to 40 days per year. Whether you are visiting family or simply seeking a change of scenery, we support a work-from-anywhere culture that helps you stay inspired. * Recharge & Unwind: We value your downtime. You start with 26 days of leave, plus we love to top that up with additional discretionary "X-days" to make sure you’re truly rested. * Multicultural & Inclusive Team: We thrive on diverse perspectives. Our international team fosters a culture of mutual respect and professional exchange, ensuring that fresh ideas and tolerance are at the heart of everything we build together. * Fuel Your Growth: We’re big on learning. You’ll get a dedicated education budget to explore new ideas and grow professionally. * Exclusive Employee Discounts: Get more for your money with access to the "Benefits at Work" platform, offering significant discounts on top global brands. * Your Benefits, Your Choice: Through Probonio, you get a monthly budget to spend on what matters to you—whether that’s your public transport pass or other flexible perks that fit your lifestyle. WHAT MATTERS TO US Research shows that candidates from underrepresented backgrounds may refrain from applying for positions if they feel they don't meet all qualifications. We strongly encourage you to apply if you’re interested: we're excited to discover how your distinctive experience can enhance our team! We work as one team. Wherever you come from. However, you identify. We believe in equal opportunities.