Senior Energy Engineer

your Jared; Poland; Hybrid; PLN 210,000 - 320,000; Full time

Benefits offered by this job

Market-level compensation

Office/hybrid in Warsaw or fullyremote

20 paid vacation days per year + sick-

sick leave

Job summary

Our client, the leading AI-powered job search platform, is recruiting a Senior Backend/Full-Stack Engineer to design backend systems powering authentication, onboarding funnels, subscription logic, and AI-driven features. The role entails end-to-end ownership of backend architecture and close collaboration with frontend and product teams.

We welcome candidates with 5+ years of backend/full-stack experience and strong expertise in NestJS, PostgreSQL, Redis, NATS, and a security-minded DevOps

Qualifications

• 5+ years of commercial backend/full-stack experience with end-to-end ownership.
• Strong production expertise in NestJS, PostgreSQL, and Redis.
• Experience with event-driven systems (NATS) and distributed architectures.
• Secure payment integrations and subscription lifecycles experience.
• DevOps mindset: Docker, Kubernetes, Helm, and PII protection.

Responsibilities

• Architect and scale core SaaS services including authentication and subscription lifecycles.
• Design and manage complex relational data models powering the core engine.
• Build high-performance backend systems using NestJS, NextJS, PostgreSQL, Redis, and NATS.
• Ensure reliability through performance tuning, caching, observability, and failure recovery.
• Own backend architecture end-to-end in collaboration with Frontend and Product teams.

Skills

Backend development

Full-stack

Distributed systems

Architecture ownership

Security mindset

Tools

NestJS

NextJS

PostgreSQL

Redis

NATS

Docker

Kubernetes

Helm

Job description

Full-time

Remote

Our client is the #1 AI-powered job search platform. Its AI agents help candidates find relevant jobs, tailor their resumes, and apply automatically.

In just two years, the company has raised $3.7M, become profitable, reached 2M+ monthly visitors and 50K+ paid subscribers, and grown to a team of 70 people.

AI is transforming the job market faster than many people can adapt. Our client started by helping the 10-15% of people actively looking for work. Now, the company is expanding its mission to help the other 85% stay relevant, develop their skills, and avoid losing their jobs.

We are now looking for a Senior Backend/Full-Stack Engineer to join our Platform Team and design the backend systems that power authentication, onboarding funnels, subscription logic, data processing, and AI-driven features.

What You’ll Do

• Architect and scale core SaaS services, including authentication (RBAC), activation funnels, and subscription/payment lifecycles (webhooks, idempotency).

• Design and manage complex, highly relational data models powering our core matching engine, including robust data processing and transformation pipelines.

• Develop high-performance, event-driven backend systems using NestJS, NextJS, PostgreSQL, Redis, and NATS.

• Ensure system reliability through proactive performance tuning, caching strategies, observability, and robust failure recovery.

• Own the backend architecture end-to-end, collaborating closely with Frontend and Product teams to deliver business impact.

• 5+ years of commercial backend/full-stack experience with the ability to own architecture end-to-end.

• Strong production expertise in NestJS, PostgreSQL (complex schema design, indexing, migrations), and Redis (caching, rate limiting).

• Proven experience building scalable data processing workflows and managing evolving, heavily relational data models in production.

• Hands-on experience with NATS or other event-driven messaging systems.

• Deep understanding of distributed systems (idempotency, retries, race conditions, eventual consistency).

• Experience designing subscription-based SaaS systems and secure payment integrations.

• Solid DevOps and security mindset: Docker, Kubernetes, Helm, auth flows, and strict PII data protection.

• Market-level compensation

• Office/hybrid in Warsaw or fully remote from nearby time zones (CET ±2).

• 20 paid working days of vacation per year + sick leave.

Dear Candidates, due to a high volume of applications, only selected candidates will be contacted for interviews. We appreciate your understanding. Thank you for considering a career with us.