Jobs Node.js

Join Sigma Software’s IT Solutions Department and help shape the internal platforms and automation solutions that support thousands of daily business operations across the company. We are looking for a Principal level engineer who combines deep technical expertise with strong leadership and communication skills.

In this role, you will work in a complex enterprise environment, contributing to scalable Back-end-heavy Full Stack solutions, enterprise integrations, and AI-enabled engineering practices. 

The position combines hands-on development with architectural decision-making, mentoring, and cross-team collaboration.

We at Sigma Software value engineering excellence, continuous improvement, and modern development approaches. You will have the opportunity to influence technical strategy, drive automation initiatives, and help establish responsible AI-assisted development standards across projects.

CUSTOMER

The role is part of Sigma Software’s IT Solutions Department, which is responsible for building and evolving the company’s internal digital ecosystem. The department develops enterprise business applications, automation platforms, integrations, and productivity solutions that improve operational efficiency and employee experience across multiple business domains.

PROJECT

The project focuses on developing and evolving enterprise-scale internal platforms and automation systems used across Sigma Software. The environment includes interconnected services, enterprise integrations, process automation workflows, and AI-assisted engineering practices designed to support operational scalability and business efficiency.

You will contribute to architecture design, implementation of scalable Back-end solutions, enterprise integrations, and AI-enabled capabilities while collaborating closely with multiple technical and business teams.

Key Technologies: JavaScript, Node.js, React.js, REST API, GraphQL, Claude Code, Codex

Job Description

• Collaborate with stakeholders on solution discovery, technical design, estimations, and delivery planning
• Design and implement scalable and maintainable software solutions aligned with business and architectural goals
• Develop production-quality Back-end-focused solutions while contributing across the Full Stack when required
• Own features end-to-end from technical design to deployment and support
• Lead and mentor Middle and Senior engineers through technical guidance and peer reviews
• Act as a key technical point of contact across multiple teams and drive cross-team collaboration
• Design and implement enterprise integrations, automation workflows, and data processing solutions
• Contribute to AI-enabled engineering workflows and product capabilities
• Establish standards for responsible usage of AI coding assistants within the project
• Review AI-generated code for scalability, maintainability, security risks, and edge cases
• Ensure system reliability, scalability, and performance under growing business demands
• Translate business requirements into practical technical solutions delivering measurable value

Qualifications

• 7+ years of commercial software engineering experience with a strong Back-end focus
• Strong hands-on experience with JavaScript and Node.js
• Experience with React.js
• Solid experience designing and developing REST API and/or GraphQL solutions
• Hands-on experience using AI coding assistants such as Claude Code or Codex in daily development workflows
• Strong understanding of software architecture, design patterns, scalability, integrations, and risk management
• Experience working in enterprise environments with multiple stakeholders and distributed teams
• Ability and willingness to lead technical initiatives and mentor engineers
• Strong communication and stakeholder management skills
• Ability to balance technical and business priorities
• Experience working with incomplete or evolving requirements
• Upper-Intermediate English level or higher

WILL BE A PLUS

• Previous formal team leadership experience
• Experience building AI-enabled business solutions
• Experience with enterprise process automation platforms
• Experience defining governance standards for AI-assisted development
• Exposure to complex distributed enterprise systems

PERSONAL PROFILE

• Analytical mindset with strong systems thinking
• High level of ownership and accountability
• Proactive and communicative approach
• Result-oriented mindset focused on measurable outcomes
• Ability to work effectively in complex organizational environments
• Strong balance between technical depth and business understanding
• Comfortable making decisions in ambiguous situations

We are looking for a Senior Node.js Engineer (AWS Serverless) to join the team supporting a well-established UK-based e-commerce retailer operating across the US, UK, and APAC markets under 16+ partner brands. 

The client runs a high-volume, subscription-driven commerce platform with complex multi-market business logic and is currently midway through a major platform modernisation initiative — transitioning from a legacy monolithic system to a modern MACH architecture (Microservices, API-first, Cloud-native, Headless). As part of the engineering team, you will contribute to building scalable cloud-native services and modern backend solutions using Node.js and AWS Serverless technologies, helping drive the next generation of the client’s global commerce platform.

Responsibilities:

• Build AWS Lambda microservices (Node.js/TypeScript) behind API Gateway, integrated with Commerce Tools and D365.
• Design and optimise DynamoDB data models and access patterns for high-throughput e-commerce.
• Contribute to CI/CD pipelines and collaborate with DevOps on infrastructure automation.
• Support knowledge transfer to client engineers on AWS serverless best practices.
• Delegate multi-step tasks to AI agents; review diffs, verify output, and maintain accountability for what gets committed.

Requirements:

• Experience: 5+ years in Software Development 
• Backend: Strong, production-grade proficiency in Node.js and TypeScript.
• Cloud5/Serverless: Production-grade expertise with AWS Lambda, API Gateway, and DynamoDB (not just theoretical).
• Architecture: Robust experience with microservices architecture and greenfield development.
• AI Tooling: You are a self-sufficient builder who ships fast, communicates clearly across international teams, and operates AI agents as a genuine force multiplier — delegating, verifying, and iterating, not just prompting.
• English level: Upper-Intermediate+

• Tech Stack Ecosystem (Nice-to-Have): Exposure to ECS, Commerce Tools, Netlify, Contentful, D365, or Akamai

   

We offer:

• Flexible working format - remote, office-based, or flexible
• A competitive salary and good compensation package
• Personalized career growth
• Professional development tools (mentorship program, tech talks and trainings, centers of excellence, and more)
• Active tech communities with regular knowledge sharing
• Education reimbursement
• Memorable anniversary presents
• Corporate events and team-building
• Other location-specific benefits

PulsePaw is a community of IT professionals united by a shared vision of creating outstanding projects. We focus on delivering turn-key products in the FinTech industry. Our approach enables us to offer not only full-cycle software development but also product and business development services, including marketing accompaniment.

At our company, you'll have the opportunity to grow, engage in meaningful projects, and see the real impact of your contributions.

About the project: You’ll be working on a young, but actively developing cryptocurrency project. It’s a young global product built on a microservices architecture with a constantly expanding number of smart contracts. 

The tech stack: Node.js, TS, Nest.js, BTC, ETH, and SOL, MySQL/PostgreSQL, RabbitMQ, Kubernetes. The product follows Domain-Driven Design (DDD), PCI DSS standards, and uses Feature Branch Flow.


Responsibilities:
Backend Development: Develop a new backend for an existing project.
Full Development Cycle: Take ownership of the entire development process.
Requirements & Architecture: Define technical requirements and system architecture.
Product Release: Ensure successful product release and ongoing maintenance.
Product Logic: Develop and maintain business logic features.
Infrastructure: Handle infrastructure-related tasks such as deployment, scaling, and performance optimization

Must Have:
Experience: 3+ years of experience in program engineering, and a deep understanding of the crypto and blockchain industry.

Blockchain: Experience in smart contract development and SOL, TON, SUI, BTC, TRX.
Blockchain Practical Knowledge: At least 1 year of experience with WEB-3.
Programming: Proficiency in Node.js, TypeScript, and Nest.js.
Databases: Experience with relational databases (MySQL, PostgreSQL).
English: Intermediate or higher level of English.
Message Queues: Hands-on experience with RabbitMQ.
Job Queues: Proficiency in Bull (Redis).
Architecture & Principles: Knowledge of DDD, EDA, SOLID, OOP, and Design Patterns.


Conditions and Benefits:
Remote-friendly culture: Work from anywhere in the world with a flexible schedule in CET timezone.
Opportunities for growth: Take advantage of paid training, English-speaking clubs, support for certifications, and participation in professional events.
Room for ideas and ownership: We work in teams with full autonomy, empowered by our clients to take complete ownership of our projects.
Benefits and compensation: Partial coverage of coworking space rent and psychotherapy, 50% of the cost of professional training and certifications.
Tech-Driven Environment: Work with modern internal tools (no legacy systems).

Responsibilities

• Develop and maintain product functionality across frontend, mobile, and backend
• Work with Node.js, React, Next.js, and Flutter
• Build and maintain functionality using PostgreSQL and Redis
• Take ownership of tasks and drive them from implementation to completion
• Understand how individual features fit into the product as a whole
• Collaborate directly with technical stakeholders on the client side
• Participate in technical discussions and contribute to implementation decisions
• Use AI-assisted development tools as part of the development workflow
• Work independently and proactively identify potential issues and improvements
• Collaborate with cross-functional team members throughout the development process

Requirements

• 3+ years of commercial software development experience
• Strong hands-on experience with Flutter
• Practical experience with Node.js
• Practical experience with React and Next.js
• Hands-on experience across the key technologies in the stack
• Experience working with PostgreSQL
• Practical experience with AI-assisted development tools such as Cursor, Claude Code, or similar
• Ability to work independently and take ownership of tasks
• Product-oriented mindset and end-to-end understanding of features
• Strong problem-solving skills
• Open and proactive communication style
• Comfortable communicating directly with the client
• Good English for direct communication with technical stakeholders

Nice to Have

• Experience with Redis
• Experience with Cloudflare
• Experience working in product-oriented teams
• Experience collaborating directly with international clients
• Interest in football

What We Value

• Look beyond individual tasks and understand the broader product context
• Can work independently without constant supervision
• Take responsibility for the final result, not just implementation
• Communicate openly and proactively
• Are comfortable discussing ideas and technical decisions directly with stakeholders
• Use AI tools thoughtfully to improve development speed and efficiency
• Adapt quickly and are comfortable working in a dynamic environment

Why Work With Us?

Not Meeting Every Skill?

About the Client

Our client is a fast-growing deep-tech startup building advanced solutions for monitoring large-scale critical infrastructure. Their technology combines innovative fiber-optic sensing with machine learning to turn existing optical fiber into a real-time distributed sensor, helping monitor infrastructure such as power grids, pipelines, railways, roads, and other critical assets.

They are building a scalable, cloud-native platform designed to solve real-world, high-impact problems. Their culture is product-driven, fast-paced, and ownership-oriented. They value strong engineers who think like builders, move fast, and care deeply about quality.

We are looking for a Senior AI-Integrated Full Stack Engineer to join our client’s applications engineering team. You will play a key role in designing, building, and scaling their platform end-to-end — from intuitive frontend experiences to robust backend services and cloud infrastructure.

What You’ll Do

* Design and implement scalable, high-performance web applications end-to-end

* Be part of an intensive transformation to modern AI work methodology using the latest AI models.

* Architect backend services and APIs and build modern, responsive frontend applications.

* Be part of complex technical discussions with the ability to contribute a major part to the discussion and decisions.

* Own features from concept to production

* Optimize performance, reliability, and security across the stack as well as promote engineering best practices

What You Bring

* 5+ years of experience as a Full Stack Developer.

* Proven experience in development using AI as the main working tool.

* Proven experience with the relevant technologies and frameworks.

* Strong understanding of system design (experience with Chakra UI is an advantage), scalability, and cloud architecture

* Proven experience working with AWS in production environments

* Fluent in English and strong communication skills.

* You embrace change and learning on the go.

* Experience working in startup or fast-paced environments.

* Strong problem-solving skills and ownership mindset.

Our Client’s Tech Stack

* Full stack: Next.js, NestJS (Typescript)

* System design: ChakraUI

* Infrastructure: Kubernetes, Docker, CI/CD pipelines

* Database: SQL / NoSQL (depending on service)

* Cloud: AWS (Lambda, ECS/EKS, S3, RDS, etc.)

AI & Modern Engineering Expectations

Candidates must be proficient and up-to-date with the latest AI advancements, actively using AI-powered development tools (like Claude Code, Code Rabbit, or similar) to accelerate development, enhance code quality, and innovate product features where AI adds user value.

Nice to Have

* Experience with Spec-Driven-Development and methodologies to support full AI embracement

* Experience designing and developing microservices architecture.

* Experience with Python and Dash.

* Background in performance optimization and distributed systems

On behalf of our Client from France, Mobilunity is looking for a Backend Engineer – NestJS.

Our client is a table management software and CRM that enables restaurant owners to welcome their customers easily. The app is useful to manage booking requests and register new bookings. You can view all your bookings, day after day, wherever you are and optimize your restaurant’s occupation rate. Our client offers a commission-free booking solution that guarantees freedom above all. New technologies thus become the restaurateurs best allies for saving time and gaining customers while ensuring a direct relationship with them.

Their goal is to become the #1 growth platform for Restaurants. They believe that restaurants have become lifestyle brands, and with forward-thinking digital products, restauranteurs will create the same perfect experience online as they already do offline, resulting in a more valuable, loyalty-led business.

Requirements:

• 5+ years building backend applications with NestJS
• Strong product ownership with experience taking features from concept to production
• Experience designing scalable REST APIs and backend services
• Comfortable working with legacy codebases and improving existing systems
• Working knowledge of React
• Experience with AWS

• Active daily use of AI development tools (Claude Code, Cursor, Copilot)

   

In return we offer:

• The friendliest community of like-minded IT-people
• Open knowledge-sharing environment – exclusive access to a rich pool of colleagues willing to share their endless insights into the broadest variety of modern technologies
• Mobilunity Medical Insurance program designed to attend our teams’ needs
• Paid vacations and sick leaves, including 5 paid days per year that don’t require a sick note
• Perfect office location in the city-center (900m from Lukyanivska metro station with a green and spacious neighborhood) or remote mode engagement: you can choose a convenient one for you, with a possibility to fit together both
• No open-spaces setup – separate rooms for every team’s comfort and multiple lounge and gaming zones
• English classes in 1-to-1 & group modes with elements of gamification
• Neverending fun: sports events, tournaments, music band, multiple affinity groups

Come on board, and let’s grow together!

Format: Remote, outstaff

Responsibilities

• Design, develop, and maintain scalable microservices using Node.js, NestJS, and TypeScript
• Build and optimize high-load backend services processing real-time data and serving millions of users
• Develop and optimize marketing and mass-notification pipelines, including bulk messaging campaigns for a multi-million user base
• Design and implement event-driven architectures using Kafka and other messaging technologies
• Work with ClickHouse for analytics and high-volume data processing, as well as MySQL/PostgreSQL and MongoDB
• Design and develop internal CRM solutions to support customer data management and business operations
• Ensure high performance, reliability, scalability, and fault tolerance of backend services
• Collaborate with other engineering teams to design and deliver scalable solutions

Required Qualifications

• Mandatory: proven commercial experience in the gambling/betting industry, working with high-load products serving millions of users
• 5+ years of commercial backend development experience
• Expert-level knowledge of Node.js, NestJS, and TypeScript
• Strong experience with Kafka, RabbitMQ, or similar message brokers
• Hands-on experience with ClickHouse or other big-data/analytical storage solutions
• Strong knowledge of MySQL/PostgreSQL and MongoDB
• Experience with Docker and Kubernetes
• Proven experience designing and implementing microservice and event-driven architectures
• English — Intermediate or above

Nice to Have

• Experience working with FinTech or crypto platforms
• Experience with Python (Django/Flask) and Celery
• Experience with AWS or GCP
• Previous experience working in remote or outstaffing teams

We are looking for a Junior-Middle Backend Developer to join a fast-growing start-up developing a product for automated lead generation and recruitment outreach.

Responsibilities:

• Day-to-day product implementation.
• Develop integrations with AI (e.g., Perplexity, OpenAI) & 3rd party API (e.g., CRMs).
• Leverage your prompt engineering skills to maximize the outcome.
• Customer discovery. That includes: internal product conversations, as well as joining some customer calls (Maybe not from day one, but definitely later on).

Requirements:

• At least 1 year of experience working in a product company/startup.
• 1-3 years of software development experience.
• Experience with Node.js, TypeScript, JSON, REST API, Git.
• Experience in LLM/RAG, MCP, and AI agent development and prompt engineering.
• Database design and optimization (SQL).
• Development in cloud infrastructure (AWS/GCP/Azure).
• Patterns for asynchronous task processing (RabbitMQ, SQS, or similar).
• Experience with n8n/make will be a great plus.
• Excellent verbal communication skills.
• Excellent English, minimum B2 level.
• Absolutely customer-centric and flexible in a dynamic environment (i.e., fully tolerant of shifting priorities daily).

Job details:

• Full-time.
• Fully remote.
• Long-term.
• B2B contract.
• Start date — ideally ASAP, but negotiable.

What else will you get:

• Learning how a startup grows.
• Direct impact on product and company strategy.
• Deliver value directly to paying B2B clients.
• You will work with the most modern toolset (including Cursor in Agent mode).

The hiring process:

• 30-45 min pre-screen interview with a recruitment manager.
• 30 min call with the client.
• A technical deep-dive interview, most likely with online coding (conducted by the client).

We're looking for a motivated JavaScript developer at the junior or trainee level to join a team that builds production-grade web scrapers for enterprise clients. Your work will run on enterprise-level web data infrastructure used by some of the world's most recognizable brands - from Fortune 500 retailers like Nike to global technology companies like Philips - powering their market research, price intelligence, and competitive data pipelines.

This is a hands-on engineering role. You won't be writing toy examples - from early on you'll be building real scrapers that extract structured data at scale.

Responsibilities

- Analyze target websites using Chrome DevTools to understand DOM structure and network requests

- Write JavaScript scrapers using Cheerio and related libraries

- Craft precise CSS selectors and XPath expressions to reliably target data elements

- Use Postman to inspect APIs and reverse-engineer data endpoints where applicable

- Handle pagination, dynamic content, and common anti-scraping patterns

- Deliver clean, structured output data (JSON/CSV) per client specifications

- Maintain and update existing scrapers as target sites change

Tech stack

JavaScript, Cheerio, CSS Selectors, XPath, Chrome DevTools, Postman, Git

Requirements

- 1 year of JavaScript experience in any context (commercial, freelance, or project-based), OR currently enrolled in / recently graduated from a Software Engineering, Computer Science, or related program

- English B2 or higher - you must be able to read technical documentation and communicate with the team in English

- Understanding of HTML/DOM structure and HTTP basics

- Ability to learn independently and figure things out from documentation

Nice to have

- Any personal or academic projects involving scraping, parsing, or browser automation

- Familiarity with Node.js ecosystem

- Basic knowledge of how proxies or headless browsers work

What we offer

- Work on real client projects from day one - no synthetic tasks

- Mentorship and code review from experienced engineers on the team

- Remote-first, fully async-friendly - work from anywhere

We're a US-based B2B SaaS company in the sales technology space. Our platform handles high-volume, real-time communication workloads for sales teams across the US. We're a small, fast-moving team. You'll have real ownership over core product systems from day one.
 

How we work — read this before applying. We ship fast and communicate constantly. Every engineer owns their issues end to end: you drive them to completion, you surface blockers within hours (not days), and you never let work sit silently. If you're stuck, you say so immediately and ask a sharp question. Getting unblocked fast is a skill we hire for. Asking early is a strength here, never a weakness. What doesn't work on this team: going quiet, letting an issue sit untouched, or waiting to be checked on. This is a full-time role and we expect full-time hours and full engagement. We won't micromanage your day, but your progress should be visible every single day through commits, PR activity, and updates, and we do pay attention to both the output and the time invested.
 

We are an AI-first engineering team — with high standards. We use Claude (Claude Code and claude.ai) throughout our entire workflow: writing code, debugging production issues, reviewing PRs, drafting documentation, and investigating incidents. You must be fluent driving agentic AI coding tools through a real codebase. But fluency is only half the requirement. You must also be the kind of engineer who never blindly trusts AI output. You review every line before it ships. You understand exactly what the generated code does, what it touches, and what could break: race conditions, edge cases, security implications, performance costs. If the AI writes it and it breaks production, that's on you. If you don't use AI tools daily, this role is not a fit. If you use them as a copy-paste machine without understanding the output, this role is definitely not a fit.
 

What you'll work on:

• Building and maintaining backend APIs and services (JavaScript/Node.js and Python)
• Real-time, high-throughput product features where latency and reliability matter
• Third-party API integrations: webhooks, OAuth, data sync jobs
• Performance and reliability work: slow query hunting, race conditions, background job/queue tuning
• Cloud infrastructure operations and scaling
   

Must-haves:

• 4+ years professional backend experience with JavaScript/Node.js, plus working proficiency in Python
• A track record of independently driving issues to completion: you break down ambiguous problems, unblock yourself, and deliver on the timelines you commit to
• Fast, proactive communication: you flag blockers same-day and ask questions early instead of spinning
• Daily, fluent use of Claude Code or comparable agentic AI coding tools
• Proven ability to review, understand, and take full ownership of AI-generated code: you can explain every change in a PR and its downstream implications
• Strong database fluency across relational (MySQL), columnar/analytical (ClickHouse), and NoSQL databases: you can read a slow query log and fix the problem
• Experience with modern backend MVC frameworks
• Experience integrating third-party APIs and building webhook systems
• Comfortable debugging production issues independently: logs, metrics, tracing
• Strong written English for async communication in Slack and project management tools
• Reliable internet and backup power (this is a production-critical role)
   

Nice-to-haves:

• Experience with real-time communication systems (VoIP, telephony, messaging, or streaming)
• Redis, job queues, event-driven architecture
• Cloud infrastructure experience (any major provider)
• Experience writing CLAUDE.md files, custom skills/commands, or MCP integrations
   

Schedule: Remote, full-time on US business hours. Most of our team works US time and we collaborate live during the day, so you should expect to work a US-hours schedule (any US timezone works). If that doesn't fit your life long term, this role isn't the right one.
 

How to apply:
Start your application with the word "BLUEPRINT" so we know you read this. Then include:

1. A short note on the most complex production bug you've personally diagnosed and fixed (what it was and how you found it)
2. A time you were assigned something ambiguous or outside your expertise. How did you get unstuck? How long did it take you to ask for help?
3. A specific example of a time you caught a mistake, bug, or bad assumption in AI-generated code before it shipped. What did the AI get wrong and how did you spot it?
4. Which AI tools you use daily and for what tasks
5. Links to code you've written (GitHub, or a description of relevant work)
6. Your expected monthly salary and earliest start date

Applications that skip these questions or answer them generically will not be considered.

About the Role

We’re looking for a Senior Software Engineer to join a newly forming team that will own one of the most specialised and business-critical domains in our technology landscape — Game Engine.

This role sits at the intersection of engineering, game mathematics, platform, and compliance. You’ll work on the tools, frameworks, and services that enable our mathematicians and game teams to build, validate, run, and monitor game logic in production.

This position is about deep ownership of a very specific technical domain: game engines, mathematical packages, simulation data, RTP monitoring, round details, and integrations with games developed both internally and by external studios.

You’ll be part of a small, experienced team with a high level of responsibility. The impact of this work is direct: incorrect game logic, missing round details, or inaccurate RTP monitoring can affect game delivery timelines, business performance, and regulatory readiness.

If you enjoy working close to complex domain logic, reviewing technical implementations, understanding how games work under the hood, and owning systems where precision matters — this role will feel like home.

Key Responsibilities

• Own, maintain, and evolve Playson’s Game Engine domain
• Work on internal frameworks and libraries used by mathematicians to implement game logic and mathematical packages.
• Review and validate code written by mathematicians, ensuring quality, correctness, maintainability, and proper usage of internal frameworks.
• Contribute to the development and support of game engines used to run mathematical logic within our platform.
• Support integrations with external game studios by helping build wrappers and bridges between third-party game implementations and Playson’s platform.
• Work with data structures and protocols that connect game logic with frontend and backend systems.
• Contribute to RTP monitoring processes, including validation of production transaction data against simulation data and expected mathematical behaviour.
• Support and evolve tools used for mathematical review, simulations, data files, monitoring, and alerting.
• Implement and maintain round details logic required for regulated markets, ensuring that detailed game round information can be correctly provided to partners and regulators.
• Collaborate closely with mathematicians, backend engineers, platform teams, compliance stakeholders, and product representatives.
• Participate in code reviews and technical discussions to ensure a high engineering standard across the Game Engine domain.
• Investigate issues related to game logic, mathematical validation, monitoring, and engine behaviour.
• Participate in minimal on-call responsibilities related to the systems owned by the team, mainly around monitoring, alerts, and domain-specific incidents.
• Take ownership of a highly specialised area where quality, accuracy, and attention to detail are essential.

Requirements

• Strong software engineering experience, ideally in backend, game engine, gaming, gambling, betting, or simulation-heavy environments.
• Solid experience with Node.js/TypeScript, or strong expertise in another OOP language such as C++, Java, C#, Go, or Python.
• Good understanding of software architecture, code quality, testing, debugging, and maintainability.
• Experience reviewing complex code and providing clear technical feedback.
• Ability to understand domain-specific logic and work with technical systems where business rules, mathematics, and engineering are closely connected.
• Strong problem-solving skills and ability to work with complex, non-standard technical challenges.
• Experience working with production systems where reliability, accuracy, and correctness are critical.
• Understanding of backend systems, APIs, data flows, and service-to-service communication.
• Ability to collaborate closely with non-engineering technical experts, especially mathematicians or domain specialists.
• Strong ownership mindset and willingness to become a key expert in a narrow but highly important technical domain.
• Product-oriented thinking, with an understanding that games are the core product and engineering decisions directly affect delivery, quality, and compliance.
• English communication skills sufficient for working in an international environment.

Nice to Have

• Experience in iGaming, gambling, betting, game development, or casino games.
• Experience working with game engines, mathematical engines, simulation tools, or game logic frameworks.
• Background in C++ or experience working with legacy C++ systems.
• Experience with mathematical models, probability-based systems, simulations, random generators, or RTP-related logic.
• Understanding of regulated markets and compliance requirements in iGaming.
• Experience with ClickHouse or other analytical/columnar databases.
• Experience with monitoring, alerting, and production diagnostics.
• Experience with AI-assisted code review or automated validation tools.
• Knowledge of microservices architecture and distributed systems.
• Familiarity with Kafka, gRPC, Kubernetes, or AWS.
• Experience integrating third-party games, external studio products, or wrapper-based solutions.
• Ukrainian language skills would be a plus.

By submitting your application, you acknowledge that your personal data will be processed in accordance with our Privacy Policy.

Is game engine logic and RTP calculation your superpower? There’s a chance to join a fresh team at a leading iGaming company as a Senior Software Engineer. TOP conditions await: above-market salary, quarterly bonuses, unlimited PTO, and a stable home for years to come!

This role sits at the intersection of engineering, game mathematics, platform, and compliance. You’ll work on the tools, frameworks, and services that enable our mathematicians and game teams to build, validate, run, and monitor game logic in production.

This position is about deep ownership of a very specific technical domain: game engines, mathematical packages, simulation data, RTP monitoring, round details, and integrations with games developed both internally and by external studios.

You’ll be part of a small, experienced team with a high level of responsibility. The impact of this work is direct: incorrect game logic, missing round details, or inaccurate RTP monitoring can affect game delivery timelines, business performance, and regulatory readiness.

If you enjoy working close to complex domain logic, reviewing technical implementations, understanding how games work under the hood, and owning systems where precision matters – this role will feel like home.

Main Responsibilities

– Own, maintain, and evolve company’s Game Engine domain

– Work on internal frameworks and libraries used by mathematicians to implement game logic and mathematical packages

– Review and validate code written by mathematicians, ensuring quality, correctness, maintainability, and proper usage of internal frameworks

– Contribute to the development and support of game engines used to run mathematical logic within our platform

– Support integrations with external game studios by helping build wrappers and bridges between third-party game implementations and Playson’s platform

– Work with data structures and protocols that connect game logic with frontend and backend systems

– Contribute to RTP monitoring processes, including validation of production transaction data against simulation data and expected mathematical behaviour

– Support and evolve tools used for mathematical review, simulations, data files, monitoring, and alerting

– Implement and maintain round details logic required for regulated markets, ensuring that detailed game round information can be correctly provided to partners and regulators

– Collaborate closely with mathematicians, backend engineers, platform teams, compliance stakeholders, and product representatives

– Participate in code reviews and technical discussions to ensure a high engineering standard across the Game Engine domain

– Investigate issues related to game logic, mathematical validation, monitoring, and engine behaviour

– Participate in minimal on-call responsibilities related to the systems owned by the team, mainly around monitoring, alerts, and domain-specific incidents

– Take ownership of a highly specialised area where quality, accuracy, and attention to detail are essential

Mandatory Requirements

– Strong software engineering experience, ideally in backend, game engine, gaming, gambling, betting, or simulation-heavy environments

– Solid experience with Node.js/TypeScript, or strong expertise in another OOP language such as C++, Java, C#, Go, or Python

– Good understanding of software architecture, code quality, testing, debugging, and maintainability

– Experience reviewing complex code and providing clear technical feedback

– Ability to understand domain-specific logic and work with technical systems where business rules, mathematics, and engineering are closely connected

– Strong problem-solving skills and ability to work with complex, non-standard technical challenges

– Experience working with production systems where reliability, accuracy, and correctness are critical

– Understanding of backend systems, APIs, data flows, and service-to-service communication

– Ability to collaborate closely with non-engineering technical experts, especially mathematicians or domain specialists

– Strong ownership mindset and willingness to become a key expert in a narrow but highly important technical domain

– Product-oriented thinking, with an understanding that games are the core product and engineering decisions directly affect delivery, quality, and compliance

– English communication skills sufficient for working in an international environment

Nice to Have

– Experience in iGaming, gambling, betting, game development, or casino games

– Experience working with game engines, mathematical engines, simulation tools, or game logic frameworks

– Background in C++ or experience working with legacy C++ systems

– Experience with mathematical models, probability-based systems, simulations, random generators, or RTP-related logic

– Understanding of regulated markets and compliance requirements in iGaming

– Experience with ClickHouse or other analytical/columnar databases

– Experience with monitoring, alerting, and production diagnostics

– Experience with AI-assisted code review or automated validation tools

– Knowledge of microservices architecture and distributed systems

– Familiarity with Kafka, gRPC, Kubernetes, or AWS

– Experience integrating third-party games, external studio products, or wrapper-based solutions

– Ukrainian language skills would be a plus

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

– HR interview

– Technical interview (with Live coding)

– Final interview