DevSecOps Engineer

Hastee, a Zellis company, is an award-winning fintech start-up providing a market-leading financial well-being solution. Our platform allows workers to get paid flexibly at any time of the month, provides money management and budgeting support, and helps them save sustainably. We deliver this in a B2B2C model, selling our solution to major employers, who in turn offer the Hastee app as a corporate benefit to their staff.

Our revolutionary technology is designed to improve the productivity of the workforce and in turn, their organizations, and we are proud to have an NPS of 76 and 4.8/5 rating in the Apple Store and Google Play. Unsurprisingly, we’ve already won over 300 amazing clients, including McDonald’s, PayPal, and the NHS, and are now on a fantastic growth journey.
Hastee was founded with a socially driven mission and has offices in Barcelona and London. We are backed by some of the leading fintech investors and are playing a crucial role in supporting workers affected by the cost-of-living crisis.

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  Cloud Infrastructure & Automation

  • Manage and maintain our AWS infrastructure (ECS, SQS, RDS, Lambda, etc.).

  • Implement and optimize CI/CD pipelines for multiple environments.

  • Automate infrastructure provisioning with Terraform or similar IaC tools.

  • Monitor and manage resource usage, scaling, and cost optimization.

  • Maintain and improve Docker images, containers, and orchestration configs.

• Platform Security

  • Apply security best practices across infrastructure and deployment processes.

  • Maintain secure network configurations (VPCs, security groups, subnets).

  • Manage SSL/TLS certificates and secrets.

  • Monitor for vulnerabilities using security tools (e.g., AWS Inspector, etc.).

  • Ensure compliance with company and industry security standards.

• Reliability & Monitoring

  • Operate and improve system observability (logs, metrics, traces).

  • Set up alerts and dashboards (CloudWatch, Grafana, etc.).

  • Support incident response and postmortem processes.

  • Contribute to backup, disaster recovery, and failover strategies.

• Collaboration & Continuous Improvement

  • Work closely with development teams to streamline DevSecOps workflows.

  • Document infrastructure and security practices.

  • Participate in internal audits, penetration test follow-ups, and compliance reviews.

  • Stay up-to-date with the latest in cloud security and DevOps tooling.

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  3+ years working as a DevOps, Site Reliability, or Infrastructure Engineer.

• Solid experience with AWS core services and security features.

• Strong knowledge of Docker and CI/CD systems (GitHub Actions, GitLab CI, Bitbucket Pipelines...).

• Proficient in Infrastructure as Code.

• Familiarity with security tooling, threat modeling, and risk mitigation strategies.

• Experience with Linux systems, scripting (Bash, Python), and networking fundamentals.

• Comfortable working in remote, async-friendly teams.

Bonus Points:

• Experience with SOC2, ISO 27001, or similar compliance environments.

• Familiarity with container scanning, supply chain security, or SBOM.

Why Join Us:

• Flexible work environment (hybrid or fully remote in the Spain).

• Opportunity to work with cutting-edge technologies in a fast-growing fintech startup.

• Strong engineering culture with a focus on quality, scalability, and innovation.

• A supportive, diverse, and dynamic team that values growth and learning.

• Work on a product that makes a real social impact on financial well-being.