Jobs Node.js

Welcome to ApexTech 🙌 

We are looking for 🚀 Fullstack Developer 🚀 who enjoys learning, building, and switching between projects. 

Responsibilities: 

● Advanced Backend and Frontend developments (JavaScript / NextJS / ReactJS) 

● Mentor / Coach other team members 

● Code reviews and refactoring 

● Advanced problem analysis and solving in production 

● Bug fixing, follow-up and workaround, identification of pain points in the platform 

● Responsible for the efficiency of all the components in the infrastructure 

● Write technical specifications when needed 

● Automate and Optimize repetitive tasks 

Required skills: 

● 5+ years of experience in JavaScript fullstack development (NodeJS / NextJS / ReactJS) 

● Proficient in building SSR/SSG/ISR web applications. 

● Proficient in building and consuming APIs - Rest / GraphQL 

● Strong knowledge of accessibility (a11y) 

● Strong understanding of SEO best practises, semantic HTML and metadata 

● Familiar with Cloudflare for CDN, caching, security and performance optimizations. 

● Familiar with Cloud DevOps (AWS preferred) 

● Eye for detail and sensitivity for graphics and aesthetics 

● Adaptability and responsiveness 

● Great analytical skills 

● Fluent in English 

● Team-player 

Nice-to-have: 

● Experience with Python Backend Development (Django / FastAPI) 

● Experience with a Headless CMS (like Sanity / Contentful, or Strapi) 

● Experience using Tailwind CSS or CSS-in-JS solutions. 

● Experience using UI libraries (like RadixUI / HeadlessUI / MaterialUI) 

● Exposure to internationalization (i18n) in NextJS 

Interview process: 

1. Intro-call with the Recruiter. 

2. Technical Interview. 

3. Client Interview. 

What do we offer?

 💻 Full remote work and meetings for brainstorming. 

💡Freedom and flexibility. 

🚀A team of top experts and synergy of the entire organization. 

💸Competitive salary. 

🌿 Vacation and sick leaves. 

🙏Therapy sessions with our psychologist. 

📚Budget for professional development. 

💃Corporate events and team building.

LineUp is a fast-growing IT outsourcing company with 13 years of experience. We are currently looking for a Middle Backend Develope to join a long-term product project.

You will become part of the Smart City ecosystem - a large-scale software product for the Middle East market. This is a fully agile, product-oriented environment with real users and a tangible impact on urban infrastructure.
 

Key Responsibilities:

• Develop and maintain robust backend applications using Node.js and NestJS in a monorepo and microservices environment.
• Embrace and operate within a T-shaped approach, being ready to extend expertise beyond backend tasks to ensure end-to-end delivery of features.
• Work with PostgreSQL (AWS RDS) and Redis to design, implement, and optimize database and caching solutions.
• Develop and maintain integrations with various AWS services including SQS, S3, Lambda, IAM, System Manager, EC2, and EKS/ECS for cloud-native applications.
• Contribute to containerization and deployment processes using Docker, including building images and pushing to registries, implementing and maintaining CI/CD pipelines using GitLab runners.
• Implement and configure monitoring and observability using Prometheus and Grafana to ensure system health and performance.
• Collaborate closely with stakeholders and other developers to understand business requirements, translate them into high-quality technical solutions that meet those needs.
• Troubleshoot and debug backend issues, optimizing code to enhance performance and maintainability.
• Participate in the agile development process, contributing to scram events, fostering a collaborative and cross-functional team environment.
• Stay current with the latest technologies and best practices, and promote continuous learning and self-development within the team. Mentor other team members, providing guidance and sharing your knowledge.

Qualifications:

• Minimum of 2 years of experience in backend development with a focus on Node.js, NestJS, and related technologies.
• Knowledge or experience in Frontend development (specifically Next.js) is a significant plus.
• Knowledge or experience with automated tests (integration, E2E) is a significant plus.
• Willingness and mindset to work in a T-shaped model, contributing to various stages of the development lifecycle.
• Familiarity with microservices architectures and monorepo environments.
• Experience with PostgreSQL (AWS RDS), Redis, and backend data management.
• Knowledge of AWS services including SQS, S3, Lambda, IAM, EC2, and EKS/ECS.
• Understanding of Docker and CI/CD pipelines, with some experience using GitLab runners.
• Familiarity with monitoring tools such as Prometheus and Grafana.
• Ability to document backend designs and processes clearly.
• Strong problem-solving skills and attention to detail, with a drive to create high-quality, performant code.
• Ability to work both independently and as part of a team in an agile environment.
• Good communication skills, with the ability to interact professionally with team members and stakeholders.
• English at Upper-Intermediate level and above.

What We Offer:

• Competitive salary.
• A collaborative and innovative work environment.
• Professional development opportunities.
• The chance to work on exciting and challenging projects.
• A supportive company culture.

We're looking for a Middle/Middle Strong Node.js developer with 3+ years of experience to join our team and contribute to an innovative project focused on transforming HR operations with AI. This is a fantastic opportunity to work on a platform that integrates with existing HR systems, handles a significant volume of employee requests, and automates various HR tasks, ensuring 24/7 personalized support across multiple communication channels.

Must have:

• Strong experience with TypeScript, Node.js, and PostgreSQL.
• Proven experience with AI/LLM integration.
• Solid understanding of backend architecture and API design principles.
• Product mindset with the ability to think beyond implementation details.
• Proactiveness and ownership mentality.
• Strong communication skills and ability to collaborate with cross-functional teams.
• Ability to work effectively in ambiguous environments and help define clear requirements.
• Experience working in startup environments.

• Upper - Intermediate or Advanced English communication skills.

   

Will be a plus:

• Experience with Microservices architecture;

   

Responsibilities:

• Develop and maintain high-quality backend services using Node.js and TypeScript.
• Design and implement robust integrations with AI/LLM models to enhance platform capabilities.
• Work with PostgreSQL to manage and optimize application data.
• Collaborate with cross-functional teams to deliver seamless and efficient HR solutions.
• Ensure the scalability, performance, and security of the platform.

• Participate in code reviews, contribute to architectural discussions, and drive continuous improvement.

   

 About the Project:

This intelligent HR automation ecosystem is designed to modernize workforce management by offloading high-volume administrative tasks. By syncing with internal directories and knowledge hubs, the system autonomously resolves nearly three-quarters of routine employee inquiries regarding compensation, corporate policies, and internal workflows. Beyond simple Q&A, it orchestrates end-to-end processes—from record updates to document generation—across global communication channels like Teams and Slack. The result is a 24/7 support layer that provides data-driven organizational insights while escalating high-priority cases to human experts.

Interview Stages

• 1-st stage - call with Recruiter
• 2-nd stage - Technical interview with our Senior developer
• 3-rd stage - Client interview

Join us as a Senior Node.js Developer and become part of a team that builds an innovative product with clean code, bold solutions, and a strong team spirit! You’ll work directly with stakeholders, influencing key decisions and driving product growth.

Zeely AI is a platform that leverages artificial intelligence to generate viral UGC videos and ad banners, and to launch effective ad campaigns on Facebook and Instagram — helping small businesses get noticed and grow. We already have 1 million users in the US, making us one of the Top 3 players in our vertical on the American market by active user count. 

Zeely is a stable product, growing more than 4x annually in the US, with a team of 160+ professionals. We are proud to be part of the Google for Startups Alumni community and official partners of Meta and TikTok. In 2024, Zeely was recognized among the Top 25 fastest-growing startups in Ukraine by Forbes.

Your key responsibilities:

• Developing and maintaining the back-end of web applications
• Designing and building REST APIs
• Working with PostgreSQL and Redis databases
• Integrating with third-party APIs
• Building and deploying applications on AWS (EC2, S3, CloudFront)
• Writing unit and integration tests
• Optimizing application performance
• Debugging and troubleshooting issues
• Writing technical documentation
• Conducting code reviews

What we’re looking for:

• 5+ years of commercial experience with Node.js applications
• 1+ years of experience with microservices architecture
• 2+ years of hands-on work with Redis and PostgreSQL/MySQL (data modeling, indexing, caching, ORM such as Prisma/TypeORM/Drizzle ORM)
• Experience with AWS
• 2+ years of experience with message brokers
• 1+ years of experience with Docker
• Understanding of scalable and reliable system design principles
• Experience with version control systems (Git)

Nice to have:

• 1+ years of experience with the NestJS framework
• Experience with payment systems
• Valid AWS certification
• Commercial experience with high-load systems
• Experience building back-end for iOS, Android, and web applications
• Experience with Terraform/Pulumi
• Commercial experience with AI APIs
• English level: Intermediate

Why it’s exciting to work with us:

• Work with cutting-edge technologies and contribute to building AI-powered tools
• Join a strong A-level team that motivates you to grow and achieve more
• Remote-first approach: work from anywhere, with the option to visit our offices in Warsaw and Kyiv
• Paid day offs and sick leaves — we care about your work-life balance
• Regular performance reviews to ensure your growth is transparent and rewarded
• Financial support — consultations for private entrepreneurs from our dedicated finance team

Recruitment process: Intro call > Test Task > Technical Interview > Final Interview > Reference check > Offer

Send us your CV — we’d love to get to know you better!

We are looking for a Software Engineer with strong backend expertise to strengthen our engineering team at a successful web project from the USA.

As a Software Engineer, you will contribute to building and enhancing the platform within a collaborative engineering team. While the current stack includes Angular and Node.js, the strategic goal is to expand backend capabilities and strengthen collaboration with engineering and ETL teams.

Depending on project priorities, you may initially focus on Angular/Node.js features, while gradually contributing more to backend services and integrations, where .NET/C# experience will be valuable. You should be comfortable working across the stack when needed.

Our ideal candidate:

• Is comfortable working across both frontend and backend when needed
• Brings strong backend engineering experience
• Can help increase the technical seniority of the team
• Is proactive and capable of contributing to technical direction and system design
• Demonstrates strong ownership and problem-solving skills
• Is collaborative, comfortable working in ambiguous environments, able to mentor others, and raise the overall technical maturity of the team

Requirements

Must have

• 5+ years of professional software development experience.
• Strong experience in backend development.
• Hands-on experience with Node.js and Angular.
• Previous or current experience with .NET / C#.
• Experience designing and implementing backend services or APIs.
• Strong problem-solving skills and the ability to work with complex systems.
• Upper-Intermediate English (B2+) or higher.
• Proactive mindset and ability to take ownership of technical solutions.

Will be a plus

• Experience with AWS or other cloud platforms
• Experience working with healthcare systems or regulated environments
• Experience with SQL and/or NoSQL databases (e.g., MySQL, MongoDB)
• Mentorship or technical leadership experience

Responsibilities

• Develop and maintain features using Angular and Node.js (Express).
• Contribute to backend services and system architecture where applicable.
• Strengthen the team's backend expertise and engineering maturity.
• Collaborate with engineering and ETL teams on integrations and data-related workflows.
• Participate in architecture discussions, code reviews, and technical decision-making.
• Identify opportunities to improve system scalability, reliability, and maintainability.
• Share knowledge and support other engineers when needed.

About Project

Our client is a Software company from the USA.

Product

This platform is dedicated to ensuring payment integrity for health payers. Our project focuses on creating and implementing cutting-edge technology solutions to tackle current and future challenges in the healthcare industry for health plans. By bringing together payers, providers, and business partners on one technology platform, we aim to facilitate transparent communication and support collaboration.

Stage

Active phase of development

Project team

Existing team on the client side. We work with the US team (Eastern and Central time zones) — around 10 people. Our team is 17 people (9 MEAN stack developers, 8 QA, 1 PM)

Project Technologies

MEAN (MongoDB, Express. js, Angular and Node.js)

Work schedule

Full-time working day (flexible hours), possibility to work remotely or visit our offices in Lviv, Kyiv or Krakow.

Interview Stages

1-st stage — Call with Recruiter (30 minutes)
2-nd stage — Interview with our Senior Engineer (1 hour)
3-rd stage — Client interview

Would you like to lead a healthtech/fintech product that integrates directly with U.S. insurance companies?
We’re looking for a Senior/Lead Software Engineer (Node.js, Angular, and .NET) with the potential to lead a team
Remote + Top salary
Let’s discuss the details?

Main Responsibilities

– Develop and maintain features using Angular and Node.js (Express).

– Contribute to backend services and system architecture where applicable.

– Strengthen the team’s backend expertise and engineering maturity.

– Collaborate with engineering and ETL teams on integrations and data-related workflows.

– Participate in architecture discussions, code reviews, and technical decision-making.

– Identify opportunities to improve system scalability, reliability, and maintainability.

– Share knowledge and support other engineers when needed.

Mandatory Requirements

– 5+ years of professional software development experience.

– Strong experience in backend development.

– Hands-on experience with Node.js and Angular.

– Previous or current experience with .NET / C#.

– Experience designing and implementing backend services or APIs.

– Strong problem-solving skills and the ability to work with complex systems.

-Upper-Intermediate English (B2+) or higher.

– Proactive mindset and ability to take ownership of technical solutions.

Will be a plus

– Experience with AWS or other cloud platforms

– Experience working with healthcare systems or regulated environments

– Experience with SQL and/or NoSQL databases (e.g., MySQL, MongoDB)

– Mentorship or technical leadership experience

We offer

– Projects with a modern JS stack (React.js, React Native, Vue.js, Angular, Node.js)

– Work entirely remotely or in our office (Lviv, Kyiv or Krakow).

– Wellness: Medical insurance/sports compensation/ health check-up+flu vaccination at your choice

– Paid vacations and sick leaves, additional days off, relocation bonus

– Education: regular tech talks, educational courses, paid certifications, English classes

– One of the best IT employers in Lviv (or IT service companies in Ukraine) based on DOU rating.

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!

Required skills:

echlexity is a product and services company building complex solutions for clients in the US and Europe. We're growing a team of engineers who care about clean architecture, high-quality code, and aren't afraid to take ownership.

• 3+ years of commercial experience with Node.js / NestJS
• Strong knowledge of PostgreSQL (schema design, indexing, query optimization, migrations)
• Hands-on experience with Redis (caching, queues, pub/sub)
• Practical experience with AWS (EC2, S3, RDS, Lambda, SQS / SNS, CloudWatch, etc.)
• Solid understanding of how to build scalable REST / GraphQL APIs
• Production-level TypeScript experience
• Knowledge of design patterns, SOLID, and clean architecture
• Experience with Docker and CI/CD
• Strong communication skills - English Upper-Intermediate or higher (written and spoken)
• Agentic coding skills - confident use of AI tools (Claude Code, Cursor, Copilot, etc.) to accelerate development, code review, testing, and documentation
  
  Nice to have:
• Experience with microservice architecture and message brokers (RabbitMQ / Kafka)
• Knowledge of Kubernetes / Terraform / IaC
• Experience with event-driven systems
• Writing unit / integration / e2e tests (Jest)
• Mentorship or tech leadership experience
   
• What we offer:
• 100% remote work from anywhere in the world
• Flexible schedule
• A large, interesting product with real technical challenges
• Modern stack and freedom to choose your tools
• Transparent communication, minimal bureaucracy
• Paid time off and sick leave
• Budget for learning, conferences, and AI tools
• Long-term contract
  
  About us Techlexity is a product and services company building complex solutions for clients in the US and Europe. We're growing a team of engineers who care about clean architecture, high-quality code, and aren't afraid to take ownership.

Come Back Agency supports US software and technology companies by running their hiring process. We work with delivery and leadership teams to define roles, screen candidates, and manage interviews. Successful candidates are hired directly by the company and become part of its team.

Employer information:
This position is with a US-based software company providing custom development and AI implementation for North American clients. The team builds and maintains production software, including AI-enabled systems, and works in long-term client engagements.
Team members operate as part of an internal, distributed team and collaborate directly with client stakeholders.

About the role:

We are looking for a talented Node.js Backend Developer to join our dynamic team. You will be responsible for developing and maintaining server-side logic, defining and maintaining the central database, and ensuring high performance and responsiveness to requests from the frontend. If you’re passionate about building scalable backend systems and have experience with Node.js, Express,Nest,js Sequelize,Prisma, Socket.io, and databases like Redis, PostgreSQL, and MongoDB, we’d love to hear from you!

What you will do:

• Develop, maintain, and improve backend services using Node.js, Express.js, and Nest.js.
• Design scalable and maintainable system architecture for web applications and services.
• Build and optimize RESTful APIs and ensure secure integration with internal and third-party systems.
• Work with PostgreSQL, Redis, and MongoDB for data storage, caching, and performance optimization.
• Implement real-time functionality using Socket.io or similar technologies.
• Develop and support file upload and processing flows using Multer or equivalent tools.
• Implement secure authentication and authorization mechanisms using JWT, OAuth, and role-based access control.
• Apply backend security best practices, including CORS, input validation, error handling, and access control.
• Optimize application performance, reliability, and scalability in production environments.
• Write clean, maintainable, and testable code following best engineering practices.
• Collaborate closely with frontend developers, QA engineers, and product teams to deliver end-to-end features.
• Integrate external APIs, payment providers, cloud services, and other third-party solutions.
• Contribute to the design and development of microservices and distributed systems.
• Use Docker for local development, service orchestration, and deployment consistency.
• Deploy, monitor, and maintain services on AWS or other cloud platforms.
• Participate in code reviews, technical discussions, and architecture decisions.
• Maintain and improve technical documentation for services, integrations, and internal processes.

What we are looking for:

• 2+ years of commercial backend development experience with Node.js.
• English level B2 or higher.
• 2+ years of experience with Express.js and Nest.js in production projects
• Solid experience with Prisma or other ORMs and a good understanding of database design principles.
• Strong knowledge of REST API design, integration patterns, and backend best practices.
• Practical experience with Socket.io or other real-time communication solutions.
• Strong knowledge of PostgreSQL and experience with Redis for caching and performance improvements.
• Working knowledge of MongoDB and understanding when to use relational vs non-relational databases.
• Experience with Docker in development and deployment workflows.
• Good understanding of AWS services such as EC2, S3, Lambda, or similar cloud platforms.
• Solid understanding of backend security practices: JWT, OAuth, CORS, validation, authorization, and secure API design.
• Good knowledge of Git and collaborative development workflows.
• Understanding of microservices architecture, service communication, and scalable system design.
• Strong problem-solving, analytical, and debugging skills.
• Ability to write structured, readable, and maintainable code with attention to quality.
• Good communication skills and ability to work effectively in a team environment.
• Experience participating in code reviews and improving engineering quality.

Nice to have:

• Familiarity with CI/CD pipelines.
• Experience with Kubernetes.
• Exposure to logging and monitoring tools (e.g., ELK, Prometheus).

Hiring stages: Recruiter screening → Technical interview (live coding) → Final culture fit interview.

What We Offer:

• Working hours aligned with US time zones, typically 16:00-00:00 Kyiv time.
• English lessons to support clear and confident communication.
• Paid vacation and sick days.
• Fully remote work.
• Opportunities for professional growth within the team.
• Structured, personalized onboarding to help you ramp up effectively.

Apply with your resume and a short note outlining your relevant experience. You can also send your resume directly through our website at comeback.ua. Selected candidates will be contacted by the Come Back Agency.

Are you passionate about building scalable, high-load systems and tackling complex engineering challenges? Join Sigma Software’s team as a Senior/Principal TypeScript Full Stack Engineer with a strong backend focus - NodeJS, and work on a modern, high-impact product alongside a distributed, collaborative team.

This role is open to candidates based in LATAM and Europe, offering the flexibility to work in a global environment and contribute to cutting-edge architecture while enhancing your expertise in backend development.

At Sigma Software, we value innovation, technical excellence, and career growth. You’ll be part of a project where your work directly influences product performance, scalability, and user experience.

Requirements

• 5+ years of experience in software engineering
• Strong proficiency in TypeScript with deep backend expertise
• Solid understanding of relational databases and caching systems
• Preferred technologies and tools: NestJS, Turborepo, monorepo environments (pnpm or similar)
• Knowledge of cloud environments (AWS preferred) and CI/CD practices
• Familiarity with frontend frameworks (React, Next.js)
• Strong understanding of software architecture principles and scalability strategies
• Excellent problem-solving skills and ability to work in a collaborative, agile environment

• Upper-Intermediate English level or higher

   

Will be a plus

• Familiarity with monorepo environments (pnpm or similar)

   

Personal Profile

• Enjoys solving complex challenges
• Collaborative mindset in distributed teams
• Strong problem-solving abilities

• Committed to code quality and scalability

   

Responsibilities

• Design, develop, and optimize backend services and APIs for high-load, distributed systems
• Contribute to frontend components using React and Next.js when required
• Ensure scalability, reliability, and security across all services
• Apply best practices in software architecture, code quality, and testing
• Participate in code reviews, mentoring, and technical discussions
• Collaborate with product managers, designers, and other engineers to deliver end-to-end features

Hi! We are looking for a Node.js Backend Developer (NestJS) to join our pack at SharksCode 🦈💙
SharksCode is a Ukrainian IT company that develops high-tech software solutions and B2B platforms, particularly in the iGaming industry.
  We are looking for a Node.js Backend Developer who will work on building scalable backend services and integrations within a distributed architecture. In this role, you will participate in designing and developing platform services, integrating external systems, and contributing to technical decisions that impact the overall product architecture.

We expect that you:

– Have 4+ years of commercial experience with Node.js development.
– Have 2+ years of experience with NestJS (or are ready to quickly adopt it).
– Have experience developing REST APIs and/or GraphQL using NestJS.
– Have strong proficiency in TypeScript.
– Have hands-on experience with MongoDB, MySQL, or PostgreSQL.
– Have experience integrating third-party APIs/services (e.g., sports feeds, payment gateways, etc.).
– Have experience working with message queues (RabbitMQ, Kafka, or similar).
– Understand distributed systems architecture.
– Have experience using Redis for caching and Pub/Sub (preferable).

Your future responsibilities:

– Design and develop backend services and product functionality.
– Build and maintain integrations with third-party financial and technical services.
– Develop public payment APIs and internal microservices.
– Participate in technical discussions and architecture decisions related to platform development.
– Ensure high code quality and follow engineering best practices.
– Share knowledge and contribute to the development culture within the team.

Nice to have:

– Experience working on high-load projects, especially with live data.
– Experience writing and maintaining automated tests (Unit, Integration, E2E).
– Experience with WebSocket, gRPC, or other real-time technologies.
– Knowledge of architectural patterns: CQRS, Event Sourcing, DDD.
– Experience with Docker, Kubernetes, and CI/CD.
– Experience in igaming/betting industry (optional, but a strong plus).

Interview stages:

🤝 Interview with Recruiter
🧠 Technical Interview
💙 Offer

We offer:

🌴 24 paid vacation days, 14 sick days, and 5 days off
⏰ Flexible start of the working day — from 9:00 to 11:00
🏥 Medical insurance
💰 Bonuses and performance-based rewards
🐶 Office in the center of Kyiv — pets are welcome, we are pet-friendly
💆 Lounge area in the office to recharge during the day
🎾 Padel tennis, football, and training at the polygon for those who enjoy active leisure
📚 Learning compensation, internal meetups and workshops, as well as access to the corporate LMS with courses
🎁 Corporate currency that can be exchanged for merch, gifts, or additional benefits

Requirements

Position name: Senior Node.js Developer(with AI agents experience)
Level: Senior
Hard skills:

• 6+ years of Software Engineering experience
• Strong experience with Node.js (Express.js, Koa.js, Nest.js)
• Strong Software Design knowledge: OOD, FP, Design patterns
• Practical hands-on experience with AI prompt engineering, leveraging ArgumentCode, ClaudeCode, Cursor, or equivalent developer-AI tools.
• Deep understanding of RESTful and GraphQL APIs, modern web performance, and security.
• Solid understanding of LLM context design, tool integration, and code-generation workflows.
• Excellent knowledge of modern systems architecture components including microservices, event sourcing, and distributed data processing systems
• Advanced experience with SQL databases, especially PostgreSQL
• Experience with Docker & CI/CD processes
• Experience with AWS (or similar services like GCP or Azure)
• Experience with Serverless framework, AWS Lambdas, AWS CloudFormation
• Knowledge of Agile (preferably SCRUM) development practices

Would be great 😎:

• Strong experience with TypeScript
• Experience as a Tech / Team Lead on projects
• A computer science, software engineering, or related field master’s or bachelor’s degree
• Hands-on experience with message queuing/delivery services (Amazon SQS, SNS, RabbitMQ, Kafka, etc.)

Responsibilities:

• Propose process improvements and take ownership of the full cycle of feature delivery
• Integrate and optimize AI/LLM workflows (e.g., OpenAI, Anthropic, or local models) through prompt design, argument-code, or Cursor-based pipelines.
• Actively participate in technical discussions
• Participate in architectural design sessions, overall team meetings, product meetings, and communities of practice
• Create architectural designs to illustrate high-level solutions for applications and feature requests
• Architect, design, and collaborate with the team to deliver features and services into production
• Write and implement efficient, scalable, and secure backend code
• Conduct code reviews, maintain technical documentation, and support deployed systems

English level: at least Upper Intermidiate

Уявіть, ви відповідаєте за бекенд high-load розподілені, орієнтовані на гравців промо-функції в найкращому iGaming продукті. Шукаємо Tech Lead: strong backend, message brokers, повний ownership. Ви вирішуєте, створюєте, впроваджуєте. Ми надаємо ремоут і найкращі умови ринку.

Focus: High-load, distributed, player-facing promo features (network promotions)

Role type: Hands-on Tech Lead (80% delivery / 20% team leadership)

Why this role

We’re scaling Promotional Features domain and building the Boosters direction further as part of our growth. This is a hands-on leadership role where you’ll personally build and ship production-ready features and own the technical direction of the Boosters team. Performance, scalability, and reliability are non-negotiable.

Boosters is responsible for player-facing network promotional features such as:

• Tournaments
• Free Spins
• Progressive Jackpots
• Smart Prize Drop Systems

Team & Collaboration model

Tech Boosters is an end-to-end cross-functional squad including:

• Full-stack & Backend Engineers
• Automation QA & Manual QA
• SRE

Product Boosters

• Product Manager
• Product Designer
• Product Analyst

There is no classic Product Owner/PM in the squad. You’ll work with a product commercial manager who acts as the customer – defines what is needed, why and how fast it is needed on the market. Your tech team owns how it will be built and when it will be delivered.

Main Responsibilities

– Own technical decisions and technical part of the products and architecture for Boosters services (hands-on, production-grade)

– Develop and maintain backend applications for promotional features

– Drive delivery as a key contributor: tech design → implement → test → release → operate

– Optimize existing systems for performance, scalability, and reliability in a distributed environment.

– Lead the team execution with a “PoC-first” approach: fast validation → measurable outcomes → production hardening

– Conduct code and architectural reviews; set engineering standards and best practices

– Be the go-to technical owner: any tech problem in the domain is your problem to solve (with the team)

– Participate in on-call rotation and continuously improve operability (monitoring, alerting, runbooks, incident reviews)

Mandatory Requirements

– Strong proficiency in Node.js and TypeScript (our primary backend stack). We’re also open to strong backend engineers from other ecosystems (e.g., Go, Java, C#, C++) who are ready to ramp up quickly

– Strong understanding of asynchronous programming and concurrency patterns

– Experience building distributed systems and working with messaging and coordination tools (e.g., Kafka, RabbitMQ, NATS, distributed locks)

– Experience with gRPC in production environments

– Solid knowledge of databases: relational (MySQL, PostgreSQL), columnar (ClickHouse), and NoSQL (DynamoDB, MongoDB)

– Experience with cloud platforms (AWS/GCP/Azure) and Kubernetes

– Skilled in building and maintaining unit and end-to-end tests

– Proven track record of delivering production-ready solutions

– Experience working with large-scale microservices architectures

– Degree in Computer Science or a related field (or equivalent practical experience)

Preferred additional qualifications:

– Understanding of application security and industry best practices

We offer

– Remote-first with flexible working arrangements across Europe or Ukraine

– Competitive compensation package (with performance-based bonuses up to 50%)

– Unlimited paid vacation & sick leave (B2B model)

– Premium health insurance (for you + 1 family member)

– Learning & development support (courses, certifications, mentoring, conferences)

– International exposure – attend industry expos, team gatherings & global meetups

We’re building a cross-browser Fingerprint SDK and a high-performance backend for fraud detection and risk analysis. 

We’re looking for a Software Engineer who enjoys
working close to the browser, handling large-scale data, and solving non-trivial engineering problems.

DARLY SOLUTIONS is an international IT company specializing in delivering innovative solutions across FinTech, MedTech, SaaS, etc.

With years of experience in web and mobile development, UI/UX design, Quality Assurance, AI, and machine learning, we pride ourselves on creating impactful products that drive success for our clients.

Since 2018, we have successfully completed over 250 projects.
Examples of our work across various domains can be found on our website - https://www.darly.solutions/

We leverage cutting-edge technologies to craft powerful, forward-thinking solutions tailored to our clients’ needs. Our team is proficient in a diverse range of tools, including Angular, NestJS, React, Vue, PHP, Ruby, NodeJS, and many others.
 

What You’ll Work On
- Develop and maintain a cross-browser Fingerprint SDK using Vanilla;
- JavaScript/TypeScript, focused on performance, accuracy, and resilience against ad blockers and privacy restrictions;
- Build backend services with Node.js (Express) to process and analyze large volumes of collected data;
- Work with ClickHouse for analytical workloads and MySQL for transactional data;
- Design and optimize raw SQL queries for high-performance data access;
- Contribute to fraud detection and risk analysis systems by identifying patterns and anomalies in data.

What We’re Looking For
- 3+ years of experience with JavaScript/TypeScript and raw Node.js (Express)
- Strong experience with JavaScript in the browser

- Experience writing and optimizing raw SQL queries
- Familiarity with high-volume data processing or analytics systems
- Bonus: experience with fingerprinting, anti-fraud systems, or cybersecurity

Nice to Have
- Experience dealing with ad blockers, tracking prevention (Safari/Firefox), or
similar constraints
- Background in security, fraud detection, or risk analysis

What we offer:

- Flexible work format - remote, 8-hour working day without time trackers;
- Competitive salary;
- TIght-knit and friendly team;
- Personalized career growth;
- Up to 50% coverage of the cost of professional courses;
- Vacation time, sick-leaves, national holidays ;
- Competitive bonuses for a personal recommendation of new employees;
-Professional development tools (mentorship program, tech talks and workshops);
- English classes with a teacher;
- Corporate events and team buildings.

Responsibilities:

• Develop and maintain scalable and efficient web applications.

• Work closely with front-end developers to integrate APIs and back-end logic.

• Design, implement, and maintain databases, ensuring their stability and scalability.

• Optimize applications for maximum speed and scalability.

• Collaborate with cross-functional teams to define and implement new features.

• Write clean, maintainable, and testable code following industry best practices.

• Leverage AI-assisted development tools to accelerate delivery, improve code quality, and streamline repetitive engineering tasks.

Requirements:

• 5+ years of experience in full-stack web development.

• Strong proficiency in back-end using Node.js

• Experience working with relational and non-relational databases (e.g., MySQL, MongoDB).

• Knowledge of front-end technologies (React.js, Vue.js, Angular) is a plus.

• Familiarity with version control systems (Git).

• Experience with APIs and microservices architecture.

• Practical hands-on experience with AI prompt engineering, leveraging Claude Code, Cursor, GitHub Copilot, or equivalent developer-AI tools.

• Solid understanding of LLM context design, tool integration, and code-generation workflows.

• Ability to effectively decompose complex back-end features into AI-assisted development tasks, accelerating delivery without sacrificing code quality.

Nice to have

• Experience with React Native

• Understanding of mobile performance optimization, memory management, and render cycles