About
CoreStar supports partners in heavy-load industries with high-performance solutions. It builds a high-load in-house platform for third-party integrations, real-time data processing, and reporting, as well as an internal AI product based on company knowledge.
Responsibilities
•Own platform architecture across services, data flows, and integrations, balancing reliability, performance, security, and ease of change
•Set performance and capacity targets; validate critical designs through prototypes, benchmarks, and load testing
•Establish engineering standards, testing practices, and review criteria; review major technical decisions and help teams apply standards independently
•Improve observability and incident diagnosis so engineers can investigate production issues beyond the services they authored
•Lead the adoption of coding agents across teams by defining delegation and verification practices, coaching engineers, and measuring improvements in delivery speed and quality
•Build and maintain shared agent instructions, skills, workflows, and MCP integrations, with clear ownership and maintenance standards
•Prioritize technical debt, reliability, and performance work, make the business impact explicit, and align execution with Team Leads
•Contribute hands-on through production code, proofs of concept, pairing, and technical reviews
•Develop engineers and strengthen review practices across teams
Requirements
•Experience owning technical direction across multiple teams, with architectural decisions taken to production and clear reasoning about their trade-offs
•Deep production experience with Node.js and TypeScript, including runtime behavior, concurrency, profiling, and performance optimization
•Experience designing and operating distributed systems under load, including service boundaries, consistency, failure handling, and third-party integrations
•Experience with MySQL, MongoDB, Redis / Valkey, and message brokers such as NATS or Kafka, including data modeling, query optimization, migrations, and delivery guarantees
•Practical experience with automated testing, CI/CD, Docker, Kubernetes, cloud infrastructure, observability, and incident response
•Hands-on experience shipping with coding agents and building reusable agent tooling adopted by other engineers
•Sound judgment about agent limitations, verification, cost, and access to company data
•Ability to influence without reporting authority, mentor engineers, and explain technical trade-offs to engineering and business stakeholders
•English proficiency
Conditions
•24 working days of paid annual leave
•6 days of paid sick leave
•Official employment
•Medical insurance
•Coffee zone with fruit and snacks available in the office
•Corporate lunch provided by the company
•Gym and sports classes
•Healthy and friendly work atmosphere
•Greek and English language classes are partially covered
