Application Security Engineer

Sofia Stars

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Sofia City, Bulgaria Until 9/14/2026 First posted March 18, 2026 Last posted July 16, 2026
Job description

Sofia Stars is a fast-growing global service provider that guides high-growth businesses to success. Our range of tailored solutions includes R&D, Customer Support, Sales, KYC, Risk, and Anti-Fraud services. We make every connection shine with fresh tech and cultural understanding.

Responsibilities:

  • Demonstrated ability to collaborate with other teams to achieve complex objectives.
  • Responsible for security architecture design from cloud infrastructure to application through the implementation of "secure by design" principles.
  • Collaborate with product managers, architects, and developers on the implementation of the security controls platform ecosystem and products.
  • Proof security implementations within infrastructure and application deployment manifests and the CI/CD pipelines.
  • Define required policies, controls, and capabilities for the protection of products and environments.
  • Build and validate declarative threat models automation.
  • Participate in engineering teams’ product planning cycles and committees.
  • Oversee the product security aspects for migration of products and services from Data Center to public cloud, e.g., AWS.
  • Serve as a trusted cyber security advisor to product and application teams.

Minimum Requirements:

  • Experience integrating security scanning/tooling into the development pipeline.
  • Experience in analysing and securing microservices and applications developed using JavaScript and Typescript.
  • Experience with CI/CD pipelines (such as Gitlab, Jenkins) and infrastructure-as-a-code models (such as Terraform, Helm, or CloudFormation).
  • Hands-on development experience in Python/shell scripting.
  • Strong understanding of supply chain security, software integrity, and secure software delivery.
  • Experience with Docker and mesh technologies (such as ISTIO).
  • Experience with architecture and security reviews, threat modelling, and application risk is highly desired.
  • Experience working with Agile methodologies.
  • Knowledge of privacy laws and regulations, such as GDPR desired.
  • Familiarity with industry regulations, frameworks, and practices. For example, PCI, ISO 27001, NIST, etc.

PREFERRED QUALIFICATIONS:

  • In-depth experience with architecting secure services on Kubernetes.
  • Extensive experience with architecting secure services on AWS or on-prem data centers.
  • Security-related professional certifications e.g., CISSP, CISM, CCSK, CCSP, CEH, are highly desirable.

Our Excellent Benefits:

  • Up to 25 vacation days
  • 6 undocumented sick leaves
  • Medical insurance and dental coverage
  • Sport card 70% coverage (Multisport and/or CoolFit)
  • Food vouchers (102 EUR)
  • Appreciation gifts (birthday, wedding, newborn, etc.)
  • Office massages
  • Breakfast, lunch & snacks in the office
  • Education budget 
  • Monthly team events
  • Great office location

Working Model:

 

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About this role

Summary

Design and implement security architecture, integrate security tools, and ensure compliance.

Job title

Application Security Engineer

Experience level

none

Industry

information technology

Location requirements

onsite in Sofia, Bulgaria; remote not allowed

Salary

Not specified

Management role

No

Skills & keywords

Required skills

security architectureJavaScriptTypescriptCI/CDTerraformHelmCloudFormationPythonshell scriptingDockerISTIOthreat modellingagile methodologiesGDPRPCIISO 27001NIST

Preferred skills

KubernetesAWSon-prem data centerssecurity certificationsCISSPCISMCCSKCCSPCEH

Specializations

securitycloudmicroservicesCI/CDinfrastructure-as-code
Locations

Structured locations inferred from the posting.

Sofia, Bulgaria

On-site City