Principal Software Engineer

Epignosis learning technologies

. Set cross-product technical direction and architectural constraints .

Posted 11/7/2026full-timeAthens • GreeceLeadWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in building production software with a focus on multi-tenant SaaS architecture and shared platform services. Capable of leading technical direction, influencing cross-functional teams, and ensuring secure and efficient service delivery.

Highest-signal resume keywords

Multi-Tenant SaaS ArchitectureModern PHP Backend ExperienceShared Platform Services DesignStrong Security InstinctTechnical Writing

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Production Software DevelopmentInterface DesignOAuth 2.0OIDCSAMLCI/CDInfrastructure as CodeObservabilityTypeScriptService Patterns

Soft Skills

Collaborative CommunicationInfluencing Without AuthorityClear CommunicationPragmatic MindsetKind Communication Style

Tools & Technologies

SalesforceTeam TopologiesPlatform-as-a-Product

Industry Keywords

Technical DirectionArchitectural ConstraintsTenant IsolationShared ServicesCross-Product DataEngineering StandardsCode ReviewsDesign ReviewsProofs of ConceptRisk Mitigation

Tech Stack

Tools & technologies

PHPTypeScript

About the role

Key responsibilities & impact

Set cross-product technical direction and architectural constraints
Define the emerging shared platform layer, initially focused on identity and billing
Lead design of shared platform services and establish reusable service patterns
Build proofs of concept and first versions of complex systems
Unblock teams facing technical challenges
Raise engineering standards through code reviews, design reviews, and mentorship
Guide safe adoption of AI-assisted development through review and validation
Make build-versus-buy recommendations for foundational services
Identify organization-level technical risks and prioritize mitigations
Partner with engineering managers and product leadership to translate technical and business implications
Document multi-year platform direction and influence team roadmaps
Deliver shared platform services with secure interfaces and migration paths

Requirements

What you’ll need

6+ years building production software, with several years operating at staff or principal level
Experience with multi-tenant SaaS architecture, including tenant isolation, shared services, and cross-product data at scale
Strong security instinct, including consideration of attack surface and blast radius
Experience designing and running shared platform services consumed by multiple teams
Understanding of interface design, adoption, and migration paths
Ability to influence without authority
Clear technical writing
Collaborative, direct, and kind communication style
Comfort explaining trade-offs to engineers and non-engineers
Pragmatic, language-agnostic mindset
Modern PHP backend experience; engineering capability and judgment valued over single-language specialization
Preferred: experience merging separate products into a unified suite
Preferred: experience consolidating billing or subscription systems, especially with Salesforce
Preferred: experience with OAuth 2.0, OIDC, SAML, and replacing legacy components in live systems
Preferred: experience with CI/CD, infrastructure as code, and observability
Preferred: familiarity with Team Topologies and platform-as-a-product
Preferred: modern TypeScript experience

Benefits

Comp & perks

Strong base pay plus performance rewards at personal, team, and company levels
Stock options for everyone
Private health coverage for every team member
Access to a nutritionist
In-house blood bank
Progressive family policy
Breakfast and catered lunch at offices
Monthly meal allowance
OASA transport card or parking space near the office
Hybrid work from home and Athens office
Learning budget for coaching sessions, conferences, university degrees, and creative pursuits
Access to learning and collaboration across the Starttech Ventures ecosystem