Senior Backend Software Engineer

JavaScript

Senior Backend Software Engineer

JavaScript
Warszawa, Warszawa

Playson

Show all offers
B2B Contract
B2B
Senior
Remote

Job description

About Playson

Playson is a product-led company and one of the leading B2B suppliers in the iGaming industry, creating online slot games and technology used by partners across more than 30 regulated markets. Our products are powered by a high-traffic, high-load platform built to operate at scale, giving our teams the opportunity to solve complex technical challenges while delivering reliable experiences to millions of players.

About the Role

We’re looking for a Senior Backend Software Engineer who thrives in a deeply hands-on environment and enjoys being close to the code on a daily basis. This role is heavily focused on building, optimising, and scaling backend services in a high-load system where performance and reliability are critical.

You’ll be working on complex, real-time challenges at the core of our platform - improving latency, ensuring high availability, and making systems more efficient at scale. This is not a coordination-heavy role; it’s for someone who enjoys writing production code, solving tough engineering problems, and seeing the direct impact of their work.

If you’re product-driven, take ownership, and prefer a “build first, improve fast” approach while working on systems where every millisecond matters - this role will feel like home.

Key Responsibilities

  • Work as part of a cross-functional team owning a core product within the platform

  • Design, build, and deliver new backend features end-to-end in a distributed environment

  • Write high-quality, production-level code daily, contributing directly to a high-load, scalable system

  • Take ownership of services handling financial transactions at scale, with a strong focus on reliability and accuracy

  • Proactively suggest and implement improvements in architecture, processes, and development practices

  • Participate in code and architectural reviews to maintain high engineering standards

  • Solve complex business and technical challenges with pragmatic, efficient solutions

  • Participating in on-call rotations within the squad to ensure the reliability and availability of our systems

  • Play an active role in ongoing tech transformation initiatives across the platform

  • Collaborate closely with engineers, product, and other stakeholders to deliver impactful solutions used by millions globally

Requirements

  • Solid experience with Node.js/TypeScript is ideal, but we also welcome experts in other OOP languages such as Java, Python, C++, C#, or Go.

  • Strong understanding of asynchronous programming techniques

  • Experience with distributed systems and messaging systems (Apache Kafka, gRPC)

  • Knowledge of relational databases (MySQL, PostgreSQL), columnar databases (ClickHouse), and NoSQL technologies (DynamoDB, MongoDB)

  • Skilled in developing and maintaining end-to-end and unit tests

  • Proven track record of developing production-ready solutions

  • Degree in Computer Science or related field

Nice to Have

  • Experience with large-scale microservices architecture.

  • Good ground knowledge of Kubernetes

  • Familiarity with cloud providers (especially AWS)

  • Understanding of application security and industry best practices

  • Understanding of enterprise development patterns

  • Active performance observation

  • Gambling domain experience

What We Offer

  • Competitive Salary

  • Quarterly Bonuses

  • Unlimited Paid Time Off

  • Unlimited Paid Sick Leave

  • Remote & Flexible Working

  • Private Medical Insurance

  • Financial Support for Life Events

  • Professional Development Budget

  • International Exposure

  • Regular Company Events

*Benefits may vary depending on location and contractual agreement

Recruitment process

1. HR interview (30-45mins)

2. Technical interview with live coding (90mins)

3. Final Interview with C-level (60 mins)

Tech stack

    OOP

    advanced

    JavaScript

    advanced

    TypeScript

    advanced

    Async Programming

    advanced

    Kafka

    regular

    Microservices

    regular

    Kubernetes

    regular

    Amazon AWS

    regular

Office location

About the company

Playson

Playson is a renowned digital entertainment supplier, founded in 2012, which has developed worldwide recognition in the iGaming industry. We operating across 27 regulated markets and partnering with more than 200 operato...
Company profile
Similar offers
First Connect Insurance

First Connect Insurance

Remote

Remote

6 957,27 - 8 295,20USD/month
AWS
PostgreSQL
TypeScript
Node.js
nestJS
SeniorSeniorB2BB2BFull-timeFull-time
New
ADVERTISEMENT: Recommended by Just Join IT
Recommended offer
Boldare

Boldare

Remote

Remote

2 244,61 - 3 580,69USD/month
React
Node.js
TypeScript
Git
SeniorSeniorB2BB2BFull-timeFull-time
New
Similar offers
First Connect Insurance

First Connect Insurance

Remote

Remote

6 957,27 - 8 295,20USD/month
AWS
PostgreSQL
TypeScript
Node.js
nestJS
SeniorSeniorB2BB2BFull-timeFull-time
New
Miquido

Miquido

Remote

Remote

5 169,78 - 6 743,20USD/month
Node.js
TypeScript
nestJS
SQL
PostgreSQL
REST API
GraphQL
Docker
CI/CD
Azure
SeniorSeniorB2BB2BFull-timeFull-time
New
Craftware

Craftware

Warszawa

Remote

Remote

40,14 - 53,52USD/h
Node.js
AWS
REST API
System Integration
Distributed systems
SeniorSeniorB2BB2BFull-timeFull-time
New
Talentica

Talentica

Warszawa

Remote

Remote

160 000 - 240 000USD/year
TypeScript
Node.js
Distributed systems
PostgreSQL
Kafka
AWS
Scala
SeniorSeniorB2BB2BB2B ContractB2B Contract
New
RITS

RITS

Remote

Remote

32,07 - 37,41USD/h
Node
TypeScript
AWS
SeniorSeniorB2BB2BFull-timeFull-time
New
ADVERTISEMENT: Recommended by Just Join IT