Jobs Node.js

International product startup building next-generation AI-powered developer tools is looking for a Senior Backend Engineer (Node.js / TypeScript). The product combines AI generation, visual editing, and product structuring into a unified platform for building and scaling web applications. This role focuses on cloud infrastructure and distributed systems, with a high level of ownership in building a scalable backend foundation for an AI-driven product.

You’ll be joining a team where engineering excellence is the standard. We value clean, type-safe and tested code, continuously deployed on reliable infrastructure that we build. If you enjoy the challenge of creating a smart backbone for the next generation of web development tools, you’ll fit right in.

Core Responsibilities

• Platform Services and APIs: Design and develop a robust ecosystem of services using Node.js and TypeScript that handle complex project lifecycles and real-time synchronization. Full ownership of the platform APIs, documentation and client libraries.
• Infrastructure as Code (IaC): Maintain and scale our global footprint on modern clouds and services using Terraform. You will be responsible for ensuring our environment is reliable, secure, and optimized for performance.
• Database & State Management: Manage data persistence for high-concurrency environments. You’ll manage complex data and caching layers to ensure efficient data access including schema design and caching strategy.
• Distributed Systems: Build and maintain the orchestration layer that handles high-volume file operations, background jobs, and complex state transitions across the Dazl ecosystem.
• Security & Compliance: Implement rigorous security protocols, including IAM management, data encryption at rest/transit and secure API design.
• CI/CD & Observability: Own the deployment pipeline and monitoring stack. Improve our ability to detect, debug, and resolve production issues before they impact users.

Requirements

• Strong professional experience in backend development, advantage for team leading skills.
•  Expert-level TypeScript and Node.js (Async patterns, Streams, Performance tuning).
• Proven experience of managing CI/CD pipelines of production-grade systems on modern clouds - AWS/GCP/Azure. You should understand VPCs, IAM roles, and containerized deployment strategies using technologies like Terraform or Pulumi.
•  Proficiency in SQL (PostgreSQL/Aurora) and NoSQL (Mongo/DynamoDB/Redis).

Advantage: Familiarity with the unique challenges of building AI products, such as non-deterministic outputs and high-latency service integration.

We are a Ukrainian outsourcing company Join.To.IT, founded in 2012, and delivering software solutions across diverse business domains.
We focus on building long-term partnerships with our clients and delivering solutions that create real business impact. Our team consists of experienced professionals who take ownership of their work, value clear communication, and are committed to high standards in everything they do.
At Join.To.IT, we create an environment where engineers can grow, influence technical decisions, and contribute to meaningful projects alongside a strong and supportive team. 

Responsibilities
Develop and maintain backend services using Node.js
Design and implement APIs (REST / GraphQL)
Work with both SQL and NoSQL databases
Integrate third-party services and external systems
Deploy and manage applications on cloud platforms (AWS / DigitalOcean)
Estimate tasks and contribute to project planning
Communicate with clients on smaller-scale projects
Understand business requirements and translate them into technical solutions
Conduct basic code reviews and ensure code quality
Suggest and implement improvements to existing technical solutions

Requirements: 
1+ years of experience with Node.js
Hands-on experience with SQL and NoSQL databases
Experience with cloud platforms such as AWS or DigitalOcean
Strong experience in API development and integration (REST / GraphQL)
At least 1 year of experience with Python
Ability to work independently without constant supervision
Experience delivering simple to mid-sized projects end-to-end
Ability to estimate tasks and timelines for small projects
Experience communicating directly with clients
Experience performing basic code reviews
Proactive mindset with a focus on improving technical solutions
Experience working in Agile environments (Scrum) and understanding of Lean principles

We offer:
Office-based or hybrid work format (office, near Vasylkivska metro station with shelter, Starlink, and uninterrupted power supply)
Paid vacation and sick leave
Medical insurance
Free gym access near the office
Supportive and collaborative team environment
Compensation for English courses and professional development

About us

We build AI-powered solutions that solve real business problems. You’ll work with the latest technologies and implement production-grade AI features, including RAG pipelines, agentic and multi-agent workflows.

Responsibilities

• Solve engineering problems related to process automation, knowledge systems, and agentic / multi-agent architectures.
• Design, build, and maintain AI-powered features that go beyond basic LLM API calls.
• Develop backend services using Node.js (Express, Fastify, or NestJS).
• Implement and iterate on RAG pipelines (retrieval strategies, chunking, evaluation, quality improvements).
• Integrate external APIs, payment systems, and authentication flows.
• Design clean REST APIs and ensure reliable client–server communication.
• Work with PostgreSQL.

Requirements

• Strong problem-solving mindset, creativity, and ability to learn quickly.
• Solid Node.js experience in production (2+ years).
• Practical experience and strong interest in LLM-based systems, not just simple ChatGPT-style wrappers, including:
  • RAG
  • LangChain (bonus: LangGraph, LangSmith)
  • Prompt engineering
• Understanding of backend fundamentals: APIs, databases, performance, and debugging.

Nice to have

• Experience with Python and FastAPI.
• Redis, queues, caching.
• AWS or GCP familiarity.
• CI with GitHub Actions.
• Monitoring and tracing tools (Prometheus, Grafana, OpenTelemetry).

What we offer

• Competitive salary and bonuses
• Remote-first culture
• Flexible schedule
• Open-minded, results-driven environment
• Product ownership and impact

Pixel mindIT is an innovative IT company specializing in software development, web applications, and mobile apps. We bring together a team of passionate professionals working with cutting-edge technologies. With us, you'll find a creative approach to complex challenges, efficient project management, and a culture of continuous growth.
 

Requirements:

- Basic to intermediate knowledge of HTML/CSS, JavaScript, and TypeScript
- Familiarity with or hands-on experience in Node.js using Express.js and/or Nest.js frameworks
- Understanding of networking principles: RESTful API design and HTTP/HTTPS protocols
- Familiarity with GraphQL APIs
- Basic understanding of databases: MongoDB, Redis, MySQL, PostgreSQL
- Eagerness to learn ORM tools such as Mongoose, Prisma.js, TypeORM, and Sequelize
- Familiarity with Git version control and GitHub in collaborative environments

What We Offer

- Flexible working hours
- Official employment with a competitive salary based on your experience and skills
- Open positions from Trainee to Middle — grow with us
- English language courses to support your professional development
- Modern office with high-quality equipment and a comfortable workspace
- Friendly and supportive team that encourages both professional and personal growth
- The opportunity to work on exciting and innovative projects

We are looking for a Strong Junior Node.js Developer with solid fundamentals and hands-on experience who is ready to grow into a confident backend engineer. You will work on real production features, APIs, and services together with experienced developers and product teams.
 

Responsibilities

• Develop and maintain backend services using Node.js
• Build and support REST APIs
• Work with databases (SQL or NoSQL)
• Integrate third-party services and APIs
• Write clean, maintainable, and well-structured code
• Fix bugs and improve existing backend logic
• Participate in code reviews and technical discussions
• Collaborate closely with frontend developers

Requirements

• Profile technical education (Computer Science, Software Engineering, or related field)
• 1+ year of commercial or strong practical experience with Node.js
• Good knowledge of JavaScript (ES6+)  and  TypeScript

• Experience with ORMs/ODMs (TypeORM, Prisma, Mongoose)
• Understanding of backend fundamentals: request lifecycle, async/await, error handling
• Experience with Express.js / NestJS or similar frameworks
• Basic experience with databases (PostgreSQL, MySQL, or MongoDB)
• Understanding of REST principles
• Experience with Git
• Willingness to learn and improve code quality
• English level: B2or higher

Nice to Have

• Familiarity with NestJS architecture
• Basic knowledge of Docker
• Understanding of authentication (JWT, sessions)
• Basic testing knowledge (Jest)

We are looking for a Node.js Developer (Blockchain Project).

Responsibilities

• Write efficient, maintainable code;
• Design and implement independent, self-sufficient components efficiently;
• Participate in architectural discussions and technical decision-making;
• Identify potential technical risks and develop mitigation strategies;
• Ensure effective knowledge sharing and maintenance within the team;
• Foster a collaborative and innovative development environment;
• Perform cross code reviews with team members;
• Properly maintain documentation.

Requirements

• 3+ years of experience with server-side JS/TS;
• Solid understanding of TypeScript and JavaScript fundamentals and internals;
• Experience with Express, NestJS, or similar frameworks;
• Strong understanding of asynchronous programming, event-driven architecture, and non-blocking I/O;
• Understanding of different types of scaling and microservice architectures in various implementations;
• Hands-on experience with Web3.js or Ethers.js for interacting with Ethereum or other EVM-compatible networks;
• Understanding of smart contracts;
• Familiarity with popular blockchains such as Ethereum, Binance Smart Chain, or Layer 2 solutions;
• Expertise in data structures, algorithms, and software design patterns;
• Solid understanding of software architectural patterns;
• Experience with relational databases (especially PostgreSQL);
• Deep experience with SQL (including schema/query design and optimization);
• Experience with ORMs;
• Familiarity with Docker, containerization, and orchestration tools;
• Strong analytical and problem-solving skills;
• Proficiency in writing unit, integration, and end-to-end tests;
• Conversational English.

Will be a plus

• Familiarity with DevOps practices and Infrastructure-as-Code (IaC) tools;
• Understanding of consensus algorithms, cryptographic principles, and decentralized applications (dApps);
• Familiarity with Matter Labs’ zk stack;
• Experience in the FinTech domain;
• Understanding of different rollup technologies;
• Openness to technology stack changes and adaptability.

We offer:

• Competitive compensation;
• Social package (24 working days of annual leave, 5 paid sick days);
• Flexible working hours;
• Challenging projects in diverse business domains and a variety of tech stacks;
• Personal development and professional growth opportunities;
• Work with talented, ambitious and family-feel teams;
• Educational possibilities: corporate courses, knowledge hubs, and in-house English classes;
• Compensation for your professional certification & support for your learning activities;
• Opportunity to choose IT equipment you like;
• Corporate social responsibility.

Junior Backend Engineer (Node.js) — Remote SaaS Product

We are a fast-growing remote-first SaaS company helping brands transform static content into searchable digital experiences.

We are looking for a Junior Backend Engineer who is eager to learn, take ownership, and grow in a fast-paced product environment.

This role is for you if you:

• Enjoy taking ownership and solving problems proactively
• Thrive in remote, asynchronous, fast-moving environments
• Care about outcomes, not just task completion
• Think systematically while executing creatively
• Are direct, collaborative, and growth-oriented

This role is NOT for you if you:

• Need highly structured processes or constant supervision
• Prefer “business as usual” over change and experimentation
• Are comfortable with mediocrity
• Struggle with remote or asynchronous work environments
• Wait for permission instead of taking initiative

Responsibilities:

• Collaborate with cross-functional teams (product, design, engineering) to build and improve backend features
• Support development and maintenance of scalable backend services using Node.js
• Help improve platform performance, reliability, and stability
• Write clean, maintainable, and well-tested code
• Monitor, debug, and troubleshoot issues with guidance from senior engineers
• Learn internal systems, tools, and best practices while actively participating in team discussions

Requirements:

• 1–2 years of experience with Node.js (JavaScript/TypeScript)
• Basic understanding of backend concepts: APIs, databases, system design
• Strong willingness to learn and grow under mentorship
• Comfortable working in a remote asynchronous environment
• Ownership mindset and proactive communication
• English level: B2+

Nice to have:

• Familiarity with cloud platforms (AWS or similar)
• Experience with SQL or NoSQL databases
• Understanding of REST APIs and/or microservices
• Interest in data processing or parsing pipelines
• Basic frontend experience (React) is a plus

Details:

• Full-time
• Remote
• CET collaboration hours
• Rate: open / negotiable

We’re excited to offer a long-term opportunity for an experienced Back-end Developer (Node.js) to join a team of professional engineers and designers. Together, you’ll be working on a US-based product that’s set to make a significant impact on the PropTech scene. This role offers the chance to contribute to a major market and collaborate with top talent in a dynamic environment.
 

About ElevateOS Product

ElevateOS has been improving the resident experience for over seven years. We created a single, all-in-one platform that makes it easy for property managers and resident staff to work together. Our goal is simple: to provide the best experience for residents by replacing multiple, confusing apps with one easy solution.

This is a stable, long-term project that continues to grow, and you'll have the chance to be part of its ongoing success.

Our primary technology stack revolves around JavaScript. We use React for the front-end, Node.js for the back-end, and React Native for mobile development.

Requirements:
- 5+ years of development experience with Node.js;
- Practical knowledge of VanillaJS, Typescript, Express-like framework;
- Hands-on experience creating robust RESTful API’s and designing scalable back-end architecture;
- Proficiency with relational DB;
- Experience with integration with 3rd party REST and SOAP API's;
- Good knowledge of GIT;
- Experience delivering projects, using modern tools like CircleCI, Docker, Kubernetes and navigating through different environments like AWS, GCP.
- Good understanding of ECMAScript specifications;
- Proficient in the English language.

Additional (good-to-have) skills:
- Experience with MySQL, nginx, Stripe, Twilio, Redis
- Experience working in a product company rather than outsourcing.

What will your responsibilities include:
- Creating first-class back-end systems by writing clear, sustainable and well-tested code;
- Improving performance and refactoring existing code;
- Cooperating with the Product, UI/UX, QA and Front-end teams to fulfil project goals;
- Configure project environments and deployment procedures;
- Bugfix during the development process;
- Cover your code with unit tests;
- Write documentation.
 

The pocess :

- a short Intro-call 

- a tech interview (1h) with backend lead (no live coding)

- a home-task (several hours).

We are looking forward to having you on board to contribute to our journey of transforming real estate property management!

SKELAR is a venture builder that builds international IT product companies according to the rules of the venture capital world. Together with our co-founders, we assemble strong teams to launch tech businesses and win in global markets.

We are currently looking for a Backend Engineer (MarTech).

We are Leaply, an ecosystem of digital and physical products designed to help people build healthy habits and improve their quality of life. We operate in global markets - the US, Tier 1, Europe, and beyond.

In June 2024, we launched an app focused on habit-building, using a subscription-based monetization model and a performance-first marketing approach (Meta, Google, TikTok). Within the first two months, we achieved positive unit economics and are now on track to grow 10x by the end of the year.

Our team is building its third business together, with successful exits behind us and a deep understanding of our niche and target audience. We move fast, communicate openly, and set ambitious goals.

What you’ll do:
— Build and evolve a unified marketing technology platform — not just a collection of tools, but a cohesive system that directly drives business performance;

— Take full ownership of 5+ existing services (Hokuto, UA automation, Creo Factory, Revealbot, Creo-translate): evaluate their current state, identify architectural bottlenecks, and systematically improve reliability, scalability, and maintainability;

— Develop and maintain production-grade integrations with Meta / TikTok / Google — ensuring robust error handling, rate limiting, retries, and clear monitoring so the system operates reliably without silent failures;

— Redesign the tracking architecture by shifting from client-side to server-side (CAPI pattern for Facebook and similar platforms), implement proper test coverage, and build tools that allow Growth Managers to independently configure tracking for their funnels;

— Eliminate manual operational workflows (e.g., in Airtable) and enable marketing teams (UA managers, designers, growth managers) to operate independently without engineering support for routine tasks;

— Proactively identify and implement new martech solutions before they become bottlenecks - shaping the long-term vision of the domain and driving technical and product priorities.

This role is for you if...

Must-have

— 3+ years of commercial backend development experience;

— Node.js / TypeScript as the main stack;

— Strong experience building reliable API integrations — including error handling, rate limiting, retries, and webhooks;

— GCP experience — Cloud Functions, Cloud Run, BigQuery, Firestore, or similar cloud environments;

— Systems thinking — able to see the system beyond individual tasks; independently designs architecture and defines development priorities;

— High level of autonomy — does not require a PM to define tasks; identifies problems and proposes solutions independently;

— Ability to collaborate with non-technical stakeholders — UA managers, designers, growth managers;

— Ownership mindset — proactively identifies risks, drives solutions, and thinks in terms of business impact;

— Uses AI as part of their workflow to move faster and think broader.

Nice-to-have

— Experience with Meta Business SDK / TikTok Marketing API / Google Ads API;

— Understanding of performance marketing — ROAS, CAPI, pixels, attribution;

— Experience building server-side tracking (e.g., Facebook CAPI or similar);

— Experience with marketing automation tools (Airtable automations, Make/Zapier, or custom solutions);

— Experience working on B2C subscription products with aggressive performance marketing.

SKELAR is an environment for self-realization of people who are able to create successful companies. We call such companies the next big everything. We believe in their power and scale.

To do this, we have created all the opportunities within our venture builder:

— 8 infrastructure teams that help businesses close any issues: from recruiting and communications to finance and legal issues;
— A community of founders who have already launched more than one business and can share practical experience;
— Internal clubs by professional areas: marketing, development, finance, recruiting, brand ambassadorship;
— Trainings, courses, attending conferences;
— Health insurance.

What You'll Own

• Architecture & technical direction of the entire serverless backend (Google Cloud Functions on Firebase / GCP).
• Code quality and standards — review PRs, define patterns, and guide the team on TypeScript best practices.
• System reliability — performance, observability, error handling, and deployment safety across dev / pre-prod / production environments.
• Integration strategy — design and maintain reliable two-way data flows with NetSuite, Business Central, HubSpot, Mailchimp, Constant Contact, Stripe, HERE API, Zapier, and Integration.app.
• Data architecture across Firestore (primary operational DB) and MongoDB (data warehouse).
• CI/CD pipelines in GitHub Actions, including selective function deployment.

• Mentorship — grow the engineering team and raise the bar on code review, testing, and documentation.
  
  What We're Looking For

  Must have:

• 8+ years of backend development with Node.js and TypeScript in production environments.
• Strong experience with serverless architectures — ideally Google Cloud Functions, AWS Lambda, or equivalent.
• Hands-on experience with NoSQL databases (Firestore, MongoDB, DynamoDB, or similar).
• Proven track record designing and maintaining third-party integrations (ERP, CRM, payment processors, webhooks).
• Solid understanding of event-driven architecture (Pub/Sub, queues, scheduled jobs, triggers).
• Experience designing REST APIs, request validation, authentication, and authorization patterns.
• Comfort owning CI/CD pipelines and managing multi-environment deployments.

• Ability to communicate clearly with non-technical stakeholders — including project managers, founders, and customers.

   

   

  Nice to have:

• Experience with Firebase ecosystem (Firestore, Cloud Functions, Auth, Storage).
• Background in CRM, ERP, or field operations domains.
• Familiarity with Stripe billing, subscription lifecycles, and in-app purchase reconciliation.
• Experience with geospatial features (route optimization, geofencing, HERE / Google Maps).

• Prior role as a tech lead or backend architect for an SMB / mid-market SaaS product.

   

  Why Join Us

• High ownership — you'll be the backend authority, not one of many.
• Real business impact — your work directly affects how field sales teams operate every day.
• Modern stack — TypeScript, serverless, cleanly structured codebase.
• Stable product with active enterprise customers and a clear product roadmap.
• Remote-first team and flexible schedule.

About the Role

Playson is a globally recognised iGaming supplier delivering a high-performance, microservices-based platform designed to process billions of financial transactions every day. Built across multiple regions, our infrastructure is focused on one clear ambition - driving latency as close to zero as possible.

We’re looking for a Senior Backend Developer 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: We offer a competitive salary, subject to annual performance reviews
• Quarterly Bonuses: Benefit from a transparent and systematic quarterly bonus system
• Unlimited Paid Vacation: Enjoy unlimited paid vacation leave, including Ukrainian bank holidays
• Unlimited Paid Sick Leave: Take unlimited paid sick leave whenever necessary
• Flexible Schedule: We offer a flexible work schedule to accommodate your needs
• Remote Work: Choose to work remotely, providing greater flexibility and comfort
• Medical Insurance: Receive comprehensive medical insurance for both you and a significant other
• Financial Support for Life Events: We provide financial support during special life events
• Professional Development: Get reimbursement for professional development courses and training
• International exposure: Attend industry expos, team gatherings & global meet-ups
• B2B contracts

Recruitment process

1. HR interview (30-45mins)

2. Interview with a Product Owner (60mins)

3. Technical interview with live coding (90mins)

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

Insiders is a fast-growing IT company which employs about 200 people. Our company focused on providing innovative digital services and cutting-edge technologies to solve complex business challenges.

We are located in Lviv and currently work in an office format. For candidates from other cities, we offer relocation (an apartment located near the office, this option is free).

What we expect from the candidate:

• A solid understanding and practical application of HTML/CSS, JavaScript, TypeScript, and Node.js.
• A deep knowledge and understanding of networking, including REST API standards and HTTP/HTTPS methods.
• Experience working with GraphQL API.
• Proven experience in Node.js with Express.js and Nest.js.
• Databases skills — MongoDB, Redis, MySQL, PostgreSQL.
• Readiness to develop expertise in Object-Relational Mapping (Mongoose, Prisma.js, TypeORM, and Sequelize).
• Experience with Git and knowledge of how to effectively use GitHub during teamwork.

what we offer:

- free study in our Corporate English Academy

- growth and development opportunities for young developers even if you have no commercial experience

- regular salary review (after the completion of each contract)

- provision of Apple equipment

- comfortable office with all amenities not far from the center (uninterrupted internet, generator, tea and coffee, pastries).

- timely payment of salaries.

- corporate events, teambuildings, etc.

- working on projects side by side with Senior developers, which will give you the opportunity to learn and develop.
 

About the Role

We are looking for a Full Stack Developer to support the continued development of a SaaS platform for inspection and analysis of engineering structures. The platform processes and visualizes large-scale geospatial and inspection datasets.

You will work across the full application stackfrom frontend UI components to backend services and data persistencewithin a modern JavaScript based architecture.

A central focus of this role is the design and development of a Progressive Web App (PWA) to enable cross-platform usage on iOS, Android, and Windows tablets, particularly for field operations with challenging connectivity conditions.

Responsibilities

• Design, implement, and maintain scalable full stack features using:
  • Frontend: Angular
  • Backend: Node.js (TypeScript, RESTful APIs / microservices)
• Lead the development of a Progressive Web App (PWA) for cross-platform mobile and tablet environments (iOS, Android, Windows)
• Implement offline-first architecture patterns, including:
  • Service Workers (background sync, caching strategies)
  • Local data persistence (e.g., IndexedDB)
  • Resilient synchronization mechanisms for intermittent connectivity
  • Develop responsive, mobile-optimized UI/UX for field usage scenarios
• Develop and optimize APIs for handling large geospatial and inspection datasets
• Work with PostgreSQL (schema design, query optimization, indexing strategies)
• Integrate and manage object storage solutions (S3-compatible storage)
• Collaborate on system architecture decisions (modularity, scalability, performance)
• Ensure code quality through testing, code reviews, and static analysis
• Contribute to performance optimization (frontend rendering, backend throughput, data pipelines)
• Work closely with domain experts (e.g., geodesists, engineers) to translate requirements into technical solutions

Required Qualifications

• Strong experience with JavaScript and TypeScript across frontend and backend
  • Solid experience with Node.js and Angular
• Proven experience building Progressive Web Apps (PWA), including:
  • Service Worker lifecycle and caching strategies
  • Offline-first application design
  • Cross-platform mobile optimization (iOS/Android/browser constraints)
• Experience designing and consuming RESTful APIs
• Proficiency with PostgreSQL (complex queries, schema design, performance tuning)
• Experience with Git-based workflows (preferably GitLab)
• Familiarity with cloud storage systems (AWS S3 or compatible)
• Understanding of software architecture principles (security, separation of concerns, modularization, API design)

Nice to Have

• Experience with geospatial data, 3D data, or point cloud processing
• Knowledge of WebGL, 3D visualization frameworks, or mapping libraries
• Experience with microservices architecture or distributed systems
• Familiarity with Docker / containerization
• Exposure to CI/CD pipelines and DevOps practices
• Background in engineering, surveying, or environmental data systems

Moon Active is one of the world's top mobile game companies, our teams leverage cutting-edge technologies to craft fun and interactive games enjoyed by millions worldwide. We produce exciting and engaging entertainment for players across the globe and pride ourselves on developing top-quality casual games that invite and allow players to connect with one another.

As a BackEnd Developer, you will be working in a scrum team implementing new features and improving existing code for our most popular game. We are looking for a Strong developer to join an engineering team that is responsible for building complex, high-scale, and real-time systems.

We work with Node.js/Redis/Aurora/K8s/Microservices, 24/7 serving 100k req/sec, 200k+ req/sec at peaks, Redis used as the main storage, handling terabytes of data and 200M ops/min.
 

Responsibilities:

• Delivering new game features every few weeks;
• Building distributed systems and microservices;
• Mainly developing real-time mobile game server with Node.js and Redis;
• Working with the Kyiv-based cross-functional team that also includes Unity developers and QAs.

Requirements:

• Backend development experience (any OOP language, ex. Node.js, Java, C#, etc.);
• Familiarity with Node.js - advantage;
• Willingness to operate within an AI-first approach for development productivity and feature integration;
• Experience with distributed systems and microservices architecture;
• Experience with NoSQL databases (ex. Redis);
• Experience with Backend development of real-time web services;
• Experience in a high scale system will be a plus;
• Experience working with Scrum teams will be a plus;
• Good spoken and written English is a MUST.

Benefits:

Why join Moon Active? 

• Be part of a leading global mobile gaming company with a unique product enjoyed by millions;
• Thrive in an exceptional, innovative, and dynamic environment;
• Enjoy full transparency and open communication with talented colleagues across teams;
• Take advantage of tremendous opportunities for professional growth and career advancement within a rapidly expanding company;
• Influence and help build personalized product experiences that impact millions of users worldwide.

We offer:

• Generous compensation; paid vacation and sick leave;
• Extensive medical and life insurance coverage for you and your family;
• CrossFit & running classes at the office and MultiSport card;  
• Comfortable and modern office located on Królewska 16 street in Warsaw;
• Free daily breakfasts and lunches, and a fully stocked kitchen with snacks and fruits;
• Latest tech equipment, including macOS devices;
• Training & Development/Tuition reimbursement;
• Friend Referral Program with generous bonuses;
• Fun and collaborative workplace culture with regular Friday Happy Hours and team gatherings;
• Relocation bonus for candidates moving to Warsaw;
• Bicycle and Car parking.

We Play to Win! We Play it Smart! We Play as a Team!

We are committed to investing in our employees and fostering a workplace that champions innovation, creativity, and collaboration. At Moon Active, we empower our team members to unleash their potential and achieve remarkable results every day. We encourage bold decision-making and believe that every individual has a significant impact on our success. Join us and level up your career in a supportive and high-achieving environment!

Our client is a fintech and cryptocurrency company building a full banking and payment processing platform, along with a crypto payment suite. You’ll join an established team working on backend development and banking integrations.

Responsibilities

• Backend development using Node.js
• Integration with external banking and financial APIs
• Development and maintenance of platform modules
• Working with SQL and NoSQL databases
• Collaboration with the client’s engineering team

Requirements

• 4+ years of hands-on backend development experience with Node.js
• Experience integrating external APIs (payment integrations are a strong plus)
• Solid experience with both SQL and NoSQL databases

Nice to have

• Experience in fintech, crypto, or banking domains
• Experience with payment integrations (e.g., Stripe)
• Knowledge of NestJS

Benefits

• Fully remote collaboration with a flexible working environment
• 14 business days of paid annual vacation, 5 paid sick days, and four additional paid holidays
• Opportunity to work on cutting-edge fintech and crypto products, shaping modern payment and banking solutions
• Collaborative and supportive team, where initiative is always valued

Our hiring process

1. Screening interview with a recruiter (30 minutes)
2. Technical interview with Team Lead and CTO (1 hour)