Product Designer

Hikari; Warszawa; Hybrid; PLN 180,000 - 260,000; Full time

Benefits offered by this job

Health insurance

Flexible working hours

Remote-friendly culture

Budget for professional growth

Job summary

Hikari is seeking an experienced Senior Backend Engineer to join our core infrastructure team. You will design, build, and maintain highly scalable microservices powering our main product.

You will architect robust APIs, optimize PostgreSQL and NoSQL data stores, and collaborate closely with front-end developers, designers, and product managers. You will mentor junior engineers and participate in code reviews to uphold code quality. This role offers flexible hours and remote-friendly culture.

Qualifications

• 5+ years of commercial backend development experience.
• Proficient in Node.js, Python or Go.
• Strong SQL and NoSQL DB knowledge; PostgreSQL, MongoDB, Redis.
• Experience with cloud platforms and containerization (AWS or GCP; Docker/Kubernetes).

Responsibilities

• Architect and implement robust backend APIs.
• Optimize database architecture for speed and scalability.
• Collaborate with frontend developers, designers, and product managers.
• Mentor junior engineers and participate in code reviews.

Skills

Backend development

Node.js

Python

Go

SQL (PostgreSQL)

NoSQL (MongoDB Redis)

Cloud platforms (AWS, GCP)

Docker/Kubernetes

Team collaboration

Mentoring

Tools

PostgreSQL

MongoDB

Redis

Docker

Kubernetes

AWS

Google Cloud

Job description

We are looking for an experienced Senior Backend Engineer to join our core infrastructure team. You will be responsible for designing, building, and maintaining highly scalable microservices that power our main product.

What you will do:

• Architect and implement robust, secure backend APIs.
• Optimize database architecture for maximum speed and scalability.
• Collaborate closely with front-end developers, designers, and product managers.
• Mentor junior engineers and participate in code reviews to maintain code quality.

What we are looking for:

• 5+ years of commercial experience in backend development (Node.js, Python, or Go).
• Deep understanding of SQL (PostgreSQL) and NoSQL (MongoDB, Redis) databases.
• Hands-on experience with cloud platforms (AWS or Google Cloud) and Docker/Kubernetes.
• Strong problem-solving skills and a proactive mindset.

What we offer:

• Competitive salary and performance-based bonuses.
• Flexible working hours and a fully remote-friendly culture.
• Health insurance and mental wellness support.
• Budget for professional growth (courses, conferences, books).