Senior Fullstack Engineer

Luxoft Germany; Polska; On-site; PLN 180,000 - 240,000; Full time

Job summary

Luxoft is seeking a skilled full-stack developer to join a healthcare data platform project in Poland. The role focuses on instrumentation, telemetry quality, and observability across distributed systems, with AI-assisted engineering integrated into the workflow.

You will contribute to secure authentication, efficient data processing, and SLA visibility for client-specific services. Responsibilities include building end-to-end TS/Next.js apps, implementing secure API/proxy components, and

Qualifications

• Experience building full-stack web apps with TS, Next.js, React.js.
• Experience implementing server-side OIDC authentication and session security.
• Design and build secure APIs and proxy services for identity platforms.
• Implement caching strategies and performance optimizations.
• Integrate audit logging for operational transparency.
• Familiarity with AI-assisted development tools (e.g., Claude Code, GitHub Copilot).
• Translate complex operational data into intuitive interfaces.
• Strong analytical mindset and skepticism toward telemetry data quality.
• Validate metrics and signals against independent sources.

Responsibilities

• Develop full-stack applications using TypeScript and Next.js/React.js.
• Implement secure server-side OIDC authentication and manage sessions.
• Build and maintain credential-brokering proxy services.
• Optimize application performance by caching costly backend queries.
• Implement audit logging and traceability features.
• Design clear, data-rich user interfaces for SLA reporting.
• Collaborate with platform and observability teams to support reliability.
• Validate telemetry and operational signals with independent data sources.

Skills

Developing full-stack web apps

TypeScript

Next.js/React.js

OIDC authentication

API design & proxy services

Caching and performance

Audit logging

AI-assisted development

Observability data quality

Job description

Project description

Join a healthcare data platform team building client-scoped SLO monitoring and alerting solutions. The project includes automated dashboard and alert generation across 110-140 services, as well as an internal application providing customer-specific SLA visibility.This role focuses on application instrumentation, telemetry quality, and observability adoption across distributed systems. AI-assisted development is expected and encouraged.In Luxoft, our culture is one that strives on solving difficult problems focusing on product engineering based on hypothesis testing to empower people to come up with ideas. Great Place to Work Institute certifies us as one of the Top 10 companies to work for in Mexico, and we do it with a truly flexible environment, high impact projects in Agile environments, a culture focused on results, training and strong support to grow your career.

Responsibilities

• Develop full-stack applications using TypeScript and Next.js/React.js
• Implement secure server-side OIDC authentication and manage sessions
• Build and maintain credential-brokering proxy services
• Optimize application performance by caching costly backend queries
• Implement audit logging and traceability features
• Design clear, data-rich user interfaces for operational and SLA reporting
• Collaborate with platform and observability teams to support reliability efforts
• Validate telemetry and operational signals with independent data sources

SKILLS

Must have

• Developing full-stack web applications with TypeScript, Next.js, and React.js
• Applying server-side OIDC authentication and session-based security measures
• Designing and building secure APIs and proxy services related to identity platforms
• Implementing caching strategies and performance optimizations
• Integrating audit logging for operational transparency
• Utilizing AI-assisted development tools such as Claude Code or GitHub Copilot
• Translating complex operational data into intuitive, user-friendly interfaces
• Maintaining a strong analytical mindset with a healthy skepticism toward telemetry data quality
• Validating metrics and signals against independent sources before operational use

Nice to have

• Grafana and observability platforms
• SLO-based monitoring and alerting
• Healthcare or other regulated environments
• SRE or platform engineering experienceDomain: US Healthcare (PHI-adjacent)Okta and observability platform accessAI-assisted engineering is a standard part of the development workflow.