# Senior Software Engineer I

**Company:** [SpotOn](https://hotfix.jobs/companies/spoton)
**Location:** Krakow, Poland, Pomeranian Voivodeship, Poland
**Role:** Fullstack Engineering
**Salary:** PLN234k – PLN293k/yr
**Experience:** 5+ years
**Skills:** Go, PHP, React, JavaScript, AWS, Terraform, Kubernetes, Payment Gateways, Ledger Systems, Pci Compliance, Data Structures, Algorithms, Design Patterns, Artificial Intelligence, Git
**Posted:** 2026-06-26

> Build and maintain high-traffic payment systems as a full-stack engineer, taking ownership across backend, frontend, and infrastructure. The role requires 5–7 years of production software experience, strong Golang skills, and comfort with fintech systems and cloud infrastructure.

## Job Description

## Responsibilities
- Take ownership of features and customer outcomes across the stack.
- Navigate complex, high-traffic production systems and solve high-stakes technical problems.
- Contribute wherever needed across frontend, backend, and infrastructure.
- Use AI tools to accelerate development, debugging, and problem solving while maintaining quality.
- Provide technical leadership and address technical debt proactively.
- Collaborate in person at the Kraków or Gdańsk offices 2–3 times per week.

## Requirements
- 5–7 years of experience building software for high-traffic production environments.
- Highly proficient in **Golang**; **PHP** experience is preferred.
- Experience integrating AI into software development workflows.
- Strong knowledge of data structures, algorithms, and design patterns.
- Strong English communication skills (minimum B2).

## Nice to Have
- Full-stack experience with **React** or **JavaScript**.
- Experience with **AWS**, **Terraform**, or **Kubernetes**.
- Payment-processing or fintech experience, including payment gateways, ledger systems, transaction routing, or PCI compliance.
- Mentoring experience through code reviews and knowledge sharing.

## Compensation and Benefits
- 19,500–24,400 PLN net on a B2B contract.
- Annual training budget of 3,500 PLN gross.
- Access to O’Reilly and other e-learning platforms.
- Fully paid private healthcare through LuxMed.
- Worksmile platform with a monthly top-up.
- Subsidized meals and office refreshments.
- Group English classes with a native speaker.
- New MacBook Pro, 4K monitors, and other required equipment.
- Flexible working hours.
- Modern city-centre offices.
- Company library, recreation room, social activities, and employee referral program.
- Relocation package within Poland.

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