Senior Software Engineer – St Petersburg

Who we are

Digi Cert is a global leader in intelligent trust. We protect the digital world by ensuring the security, privacy, and authenticity of every interaction. Our AI-powered Digi Cert ONE platform unifies PKI, DNS, and certificate lifecycle management, to secure infrastructure, software, devices, messages, AI content and agents. Learn why more than 100,000 organizations, including 90% of the Fortune 500, choose Digi Cert to stop today’s threats and prepare for a quantum-safe future at

Job summary

This position is for the SSL Store, powered by Digi Cert

We are hiring a Senior Software Engineer to build and run the platform behind our certificate management, TLS and vulnerability monitoring, uptime, and security products. The platform is a Type Script monorepo:
Fastify and Express services, Next.js and React frontends, MySQL and Redis, queues and workers on AWS, deployed to Kubernetes through Terraform, Helm, and Azure Dev Ops pipelines. It also carries a legacy .NET estate that we are steadily retiring, and a growing set of AI-assisted features and internal tooling.

You will own features end to end, from schema and API through UI, pipeline, and production. We work in a small team with a lot of surface area, so the job rewards engineers who pick up whatever the problem needs, whether that is a new framework, a scanner’s quirks, or a cloud primitive they have not touched before

What you will do

• Design, build, and ship features across the full stack:
  Fastify or Express APIs, Next.js and React frontends, MySQL schemas and migrations, SQS-driven workers, and the infrastructure that runs them.
• Own services in production: observability with Sentry and Grafana, on-call participation, incident root-causing, and the follow-through fixes.
• Build and evolve security and monitoring products that scan, probe, and score real customer infrastructure at scale, with correctness and performance budgets that matter.
• Maintain and incrementally retire legacy .NET and Python components, moving behavior into the Type Script platform with parity verified rather than assumed.
• Extend CI/CD and infrastructure:
  Azure Dev Ops pipelines, Docker images, Helm charts, and Terraform for EKS, RDS, SQS, and related AWS services.
• Integrate third-party and partner APIs (certificate authorities, scanners, identity providers) and keep those integrations resilient.
• Use AI-assisted development tools as part of daily work, and build AI-backed features where they genuinely improve the product.
• Review code, write tests, and raise the bar on standards that apply to human and AI-generated code alike.
• Mentor other engineers and write up decisions so others can act on them without you in the room.

What you will have

• 6+ years building and operating production web services and the frontends on top of them.
• Strong Type Script and Node.js, including a modern API framework (Fastify preferred, Express acceptable) and a React framework (Next.js preferred).
• Production experience in more than one language or ecosystem, and at least one stack change you drove or adapted to in the last few years. Depth in a single language is not enough for this role.
• Solid relational database skills on MySQL or Postgres: schema design, migrations, indexing, query performance, and transaction and locking behavior.
• Comfort owning what you ship: logging, metrics, alerting, and calm, evidence-led debugging in production.
• Security awareness as a habit: authentication and authorization flows, secrets handling, input validation, and dependency hygiene.
• Clear written communication. You can explain a design, a trade-off, or an incident to engineers and non-engineers.

Digi Cert is an Equal Opportunity employer and is committed to…