Site Reliability Engineer - Prediction Markets Hedge Fund en Barcelona, España

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About the Company

BlueWalker Capital is a hedge fund developing systematic and quantitative trading strategies native to prediction markets.

We log hundreds of millions of trades and order book ticks per day, isolate market pairs from tens of millions of combinations, and continuously monitor for a range of arbitrage opportunities we execute on. It's still early days for us—we are deepening a moat across trading infrastructure, datasets, and modeling.

We trade algorithmically using our own balance sheet, generating daily returns exceeding 1% with the capacity to rotate hundreds of thousands of euros in daily volume.

Our mission is to become the leading hedge fund in this emerging asset class, delivering investment returns while making prediction markets efficient as the world's most accurate source of truth.

Backed by world-class investors

Daniel Howard is the Founder and Managing Partner of Halo Capital, a digital assets venture fund associated with Brevan Howard. Previously, he was a Principal at 10T Holdings, a Machine Learning Engineer at Spark Cognition, and a Data Scientist at Verisk. Daniel also spent over seven years in academia across Columbia University’s Engineering and Business schools.

Wouter Gort - Hummingbird Ventures

Wouter Gort is a Partner at Hummingbird Ventures, where he leads Nomads, the firm's fund-of-funds. Previously, he co-founded Greyhound Capital and led investments in companies such as Revolut, Toss, Brex, N26, and Marqeta. Wouter also seeded a startup hedge fund that was acquired by global market maker IMC Trading in 2023.

About the Role

We are a small engineering team, which means your responsibilities scale rapidly and your impact is clear and foundational. Much of our infrastructure is still greenfield, and entire systems can be yours to design and own. You'll ensure the reliability, observability, and operational robustness of systems handling hundreds of thousands of euros in daily trade volume, where latency spikes and downtime have direct P&L consequences.

Responsibilities

Own uptime and reliability of trading infrastructure: execution systems, market data pipelines, and risk monitoring.

Build and maintain observability across the stack (Prometheus, Grafana, distributed tracing) with alerting tuned to trading-specific failure modes.

Define SLOs and error budgets for latency-sensitive services; lead incident response and post-mortems.

Harden infrastructure against data feed outages, exchange connectivity failures, and clock drift.

Manage and automate deployments, environment configuration, and secrets management (Kubernetes, Terraform, CI/CD, HashiCorp Vault, GCP Secret Manager).

Capacity plan and performance-tune systems under real trading load, identifying bottlenecks before they become incidents.

Who we are looking for

Hard Skills

• 2+ years in a production SRE or DevOps role with ownership of critical, low-tolerance systems.
• Proficiency in Python or Go for tooling, automation, and service development.
• Hands-on experience with Kubernetes, Terraform, and CI/CD pipelines.i>
• Strong Linux fundamentals: networking, kernel tuning, process isolation, and time synchronization (PTP/NTP).
• Experience with observability stacks and building alerting logic that minimizes noise without missing critical events.

Soft Skills

• Sharp and methodical under incident pressure; rigorous in post-mortems.
• Self-starter who takes ownership of problems end-to-end with limited guidance.

Preferred Skills

• Familiarity with trading infrastructure: FIX protocol, market data (ITCH, OPRA), exchange connectivity.
• Experience with high-throughput messaging systems from durable, replayable pipelines (Kafka) to low-latency in-memory streams with consumer semantics (Redis Streams) to brokerless microsecond-range IPC (ZeroMQ).
• Understanding of latency profiling and performance optimization in time-critical systems.

What it’s like here

Fast paced environment.

We’re direct and honest with each other.

5 days a week, in person. Full immersion.

Project ownership and autonomy, flat company structure.

We value people who take initiative and are able to figure things out.

Company culture is informal, non-hierarchical, ambitious, collaborative and entrepreneurial.

Compensation

Competitive compensation, tailored to ability and experience.

Flexible Holidays

Special Events

From Spain to the World

Talent is evenly distributed. Opportunity is not. Spain produces world-class technical talent, but the local market rarely provides the opportunities to unlock exponential careers. At BlueWalker Capital, we build for exponential outcomes. Join us as we expand our footprint across global capital markets and put Spain on the map of excellence.

Join a navy-seal like team of engineers, data scientists and traders.