Remote Hands-on Cybersecurity Lead - Blockchain Infrastructure

Traffit; Warszawa; Remote; PLN 335,000 - 446,000; Full time

Benefits offered by this job

Private healthcare

Multisport card

Budget for certifications and security

hardware budget and company equipment

Job summary

RedStone is seeking a senior cybersecurity leader to protect its cloud infrastructure and data feeds. You will design controls, run pentests, and implement operational-security standards across teams.

This is a hands-on, senior role reporting to the CTO, collaborating with CSO, QA, and Infrastructure leaders. You will own Cloud security across AWS, threat detection pipelines, offensive security programs, resilience controls, and company-wide OpSec initiatives, including secure software delivery

Qualifications

• 5+ years in cybersecurity, including 3+ years leading security for production-critical systems.
• Strong, hands-on knowledge of AWS security and cloud-service protection: IAM, Organizations and SCPs, VPC design, KMS, CloudTrail, WAF; securing containers (EKS/ECS) and serverless workloads.
• Experience securing and operating critical financial infrastructure — a bank, exchange, payments, trading, custody or market-data system — where availability and integrity carry a direct financial cost.
• Deep understanding of threat detection: building detections, running a SIEM or XDR platform, threat hunting and leading incident response.
• Hands-on penetration-testing experience and fluency with standard pentest and cloud-security tooling; you can show what you would break and how.
• A track record of designing and rolling out OpSec standards across a whole company — and getting non-engineers to follow them

Responsibilities

• AWS and cloud security — account structure and guardrails, IAM and least privilege, network segmentation, KMS and Secrets Manager, CloudTrail and VPC Flow Logs, WAF; standard across SaaS estate.
• Threat detection and response — the SIEM and detection pipeline; detections for activity relevant to blockchain oracles; alerting and on-call escalation; incident-response playbooks and post-mortems.
• Penetration testing and offensive security — internal pentests and red-team exercises against AWS accounts, APIs, RPC endpoints, relayers and CI/CD; external pentests and audits; triaging bug-bounty findings and fixes.
• Critical-infrastructure resilience — change control for production and smart-contract deployments, dual control, break-glass, availability and latency SLOs, DDoS posture.
• Company-wide OpSec standards — define and roll out standards across every team; device baselines, identity hygiene, phishing resilience, security onboarding.
• Blockchain infrastructure security — protecting oracle nodes, on-chain relayers, RPC endpoints and push infra; signing keys on HSM/KMS; multisig and admin-key controls; monitor on-chain activity.
• AI in security operations — evaluate AI tooling for detection, triage and investigation; secure use of AI tools and agents
• Secure software delivery — branch protection, code-review gates, signed artifacts, dependency and secrets scanning in GitHub Actions

Skills

AWS security

Threat detection

Penetration testing

Terraform

TypeScript

GitHub Actions

SIEM / XDR

Cloud security

Tools

KMS

CloudTrail

WAF

Job description

RedStone is seeking a senior cybersecurity leader to protect its cloud infrastructure and data feeds. You will design controls, run pentests, and implement operational-security standards across teams.

This is a hands-on, senior role reporting to the CTO, collaborating with CSO, QA, and Infrastructure leaders. You will own Cloud security across AWS, threat detection pipelines, offensive security programs, resilience controls, and company-wide OpSec initiatives, including secure software delivery