Jobs Node.js

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 invite a Senior Software Engineer with strong Node.js expertise and solid AWS knowledge to join our team. You'll work with a trusted leader in the Point-of-Sale industry with over 100,000 global installations. In this role, you’ll contribute to our client’s new initiative focused on creating data mapping between diverse menu order systems and integrating two distinct APIs to ensure seamless and accurate data transfer.

🟩 What's in it for you:

• Collaborate on a high-load, technically challenging backend project, expanding your expertise in API integration, data mapping, and data transformation
• Contribute to a global tech platform offering robust solutions for the restaurant and food service industry
• Influence technical best practices and mentor engineers, promoting a culture of quality and continuous improvement

✅ Is that you?

• 4+ years of commercial backend development experience with deep expertise in Node.js and TypeScript in production environments
• 2-3+ years of AWS experience (EC2, ECS, Lambda, SQS/SNS, CloudWatch, etc.)
• Solid experience with MongoDB
• Proven experience designing, building, and maintaining RESTful APIs
• Strong understanding of backend architecture and service design
• Experience writing unit and integration tests
• Experience with CI/CD pipelines and automated deployments
• Strong ownership mindset and ability to work independently, resolve complex issues, and deliver solutions
• Excellent communication and cross-functional collaboration skills
• Upper-Intermediate+ English level

Desirable:

• Experience mentoring or providing technical guidance to engineers
   

🧩Key responsibilities and your contribution

In this role, you’ll contribute to the design, development, and continuous improvement of high-loaded backend systems and services, ensuring technical quality and delivering bullet-proof solutions.

• Design, build, and maintain high-loaded backend systems and APIs using Node.js and AWS
• Develop new backend features and enhancements for production systems
• Support and troubleshoot production systems to ensure reliability and performance
• Identify and reduce technical debt and implement improvements to maintain code quality and reliability
• Write and maintain unit and integration tests to ensure code quality
• Collaborate with cross-functional teams to define requirements and deliver bullet-proof solutions
• Contribute to the continuous improvement of backend architecture and development practices
• Create and maintain clear, organized development documentation

• Project Description:

  The Carbon Capture Platform is designed to support the verification and management of CO₂ sequestration data from Carbon Capture and Storage operations. The system processes operational monitoring data, generates verifiable records, and enables the creation of digital tokens representing stored CO2.
  At the beginning of the engagement, the team will analyze the existing platform, including reviewing the architecture, evaluating the current codebase, and identifying technical issues, gaps, and potential risks.
  Based on this assessment, the team will work on resolving identified problems, improving system stability and scalability, and implementing required enhancements. The team will also continue development of new features and support onboarding of new customers, including integration with external data sources such as SCADA systems.
  The overall goal of the engagement is to ensure reliable operation of the platform, support its further development, and enable efficient integration of new users and data sources.

   

• Responsibilities:

  • Analyze the existing backend architecture and codebase to identify technical debt, performance issues, and design limitations
  • Support the team in evaluating the current data model, APIs, and data processing logic
  • Implement improvements to backend services to address identified architectural or performance issues
  • Develop and maintain backend APIs supporting data ingestion, system operations, and platform integrations
  • Implement new features and enhancements requested by the customer
  • Support integration of external systems such as SCADA platforms and industrial monitoring systems
  • Troubleshoot and resolve production issues affecting backend services
  • Collaborate with DevOps and QA teams to maintain system reliability and performance
   

• Mandatory Skills Description:

  • 5+ years of backend development experience
  • Strong experience with NodeJS and modern backend frameworks
  • Cloud Infrastructure: Hands-on experience with AWS services (specifically Lambda, RDS, and S3).
  • Python Proficiency: Practical experience with Python for backend logic or data processing (this is a must-have for this specific role).
  • Architectural Proficiency: Experience designing Microservices and robust REST APIs that handle high-throughput data ingestion.
  • Experience working with relational databases such as PostgreSQL
  • Basic understanding of blockchain integrations

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 5+ years of commercial experience with Node.js development.
– Have 1+ year of experience with NestJS or are ready to quickly adopt it.
– Have experience developing REST APIs and/or GraphQL services using NestJS.
– Have strong proficiency in TypeScript.
– Have hands-on experience with MongoDB, MySQL, or PostgreSQL.
– Have experience integrating third-party APIs and services.
– Have experience working with message queues (RabbitMQ, Kafka, or similar).
– Understand distributed systems architecture.
– Have experience using Redis for caching or Pub/Sub mechanisms.

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 with high-load systems, especially with live or real-time data.
– Experience writing automated tests (Unit, Integration, E2E).
– Experience with WebSocket, gRPC, or other real-time technologies.
– Knowledge of architectural patterns such as CQRS, Event Sourcing, or DDD.
– Experience with Docker, Kubernetes, or CI/CD pipelines.
– Experience working in the gambling or betting industry.

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.

Inforce — Software Development Company delivering high-quality web and mobile solutions for international clients.

Required Skills:
 

Backend:

• 1+ years of commercial experience with Node.js
• Strong knowledge of RESTful APIs and integrations
• TypeScript, NestJS
• MySQL or PostgreSQL
• Experience with Redis, RabbitMQ
   

Frontend:

• 1+ years of commercial experience with React.js
• TypeScript
• State management (Redux / RTK / MobX)
• Data fetching (SWR / RTK Query)
• React Hooks
• SASS, Bootstrap or similar
• Git
• Intermediate English or higher
   

Would be a plus:

• Experience with BullMQ

Responsibilities:

• Develop backend services and APIs
• Build and maintain React applications
• Work with databases and integrations
• Collaborate with team and participate in development process

We offer:

• Competitive salary 
• Interesting projects
• Paid sick leave and vacation days
• Professional and supportive team
• 50% compensation for professional courses
• Team-building activities and corporate events
• Office in the city center
  
  Grow your career with a team that values people as much as results.

What we’re looking for

We’re hiring a Senior Software Engineer who thinks beyond code. You understand business problems, translate them into solid technical solutions, and know how to prioritize what actually matters.

You’re not just experienced—you’re decisive. You know what to tackle now, what to defer, and what to delegate.

AI is a core part of how you work. You’ve been actively using AI-assisted development (ChatGPT, Cursor, etc.) for 3+ years and can consistently produce high-quality output—where ~80% of your code is AI-generated and meets production standards.

Our platform has evolved from a data middleware solution into a multi-layer, event- and workflow-driven system. You’ll help shape what it becomes next.

We’re a growing team, with strong engineering presence in and around Lviv.

Security and quality come first. We’re ISO 27001 certified and rely on structured, often AI-driven processes to deliver consistently high standards.

⸻

Requirements

6+ years of software development experience

Strong TypeScript (Node.js) skills

Proven ability to turn business requirements into scalable solutions

Strong architectural instincts and system design experience

Hands-on Azure experience (App Services, Functions, cloud-native)

Experience with REST APIs, JSON/XML

Solid DevOps and CI/CD experience

Strong communicator, fluent in English

⸻

What you’ll do

Own problems end-to-end: from business need to production solution

Design and build scalable systems in TypeScript on Azure

Make smart trade-offs and prioritize effectively

Use AI to accelerate development, testing, and documentation

Contribute to an event-driven, workflow-centric architecture

Improve reliability, performance, and security across the platform

Work closely with product and engineering to ship fast and well

⸻

Nice to have

Event-driven architecture experience

High-availability system design

Experience in healthcare/fintech or regulated environments

Familiarity with FHIR or similar standards

Remote full-time position. Freelance contract.

Location: Remote
Workload: Full-time
Project: long-term

About the role

We’re looking for a Backend Developer with strong Node.js/NestJS expertise to build and scale microservices-based systems. The role involves designing high-load services, working with distributed systems, and integrating modern backend patterns including async processing and real-time communication.

Requirements

• 3+ years of experience with Node.js and NestJS
• Strong experience with PostgreSQL, MongoDB, Redis
• Solid understanding of microservices architecture
• Experience with asynchronous processing (queues, event-driven systems)
• Ability to write scalable, maintainable, and reliable code
• Experience building REST APIs, WebSockets (WS/WSS), RPC services
• Ability to read and work with existing codebases
• High attention to detail

Nice to have

• Experience with Go / Golang
• Deep knowledge of NestJS (lifecycle, DI, custom providers, dynamic modules, scopes, Async Local Storage, reflector)
• Deep knowledge of Redis (MULTI/EXEC, data structures, Lua scripts, Pub/Sub)
• Basic understanding of prompt engineering, AI agents, skills

Responsibilities

• Develop and maintain microservices
• Design and implement high-load backend systems
• Work with event-driven and async architectures
• Optimize performance and scalability
• Collaborate with cross-functional teams

About the Company

Our client is a financial technology services provider dedicated to expanding global access to digital assets by building innovative solutions in the trading ecosystem. Their products provide exchanges, liquidity solutions, and enterprise-grade integrations for clients worldwide. We are looking for a skilled Middle Backend Software Engineer who not only writes code but also builds products with an "AI-first" mindset.

In this role, you will be a core member of our engineering team, translating complex financial and crypto concepts into intuitive, high-performance applications. You will thrive on solving technical puzzles and collaborating in a fast-paced, rapidly growing environment.

What You'll Do

You'll be a key builder in our development lifecycle, focusing on product-led engineering where AI is a central component of both the product and your workflow. Your main responsibilities will include:

• Core Product Development: Develop, test, and maintain user-facing features for our exchange and liquidity platforms using TypeScript and Nest.js.
• AI Integration: Implement and optimize AI-driven features within the product to enhance user experience and operational efficiency.
• Collaboration: Work closely with product owners, UI/UX designers, and backend engineers to translate requirements into fully functional, enterprise-grade applications.
• Code Quality & AI Co-piloting: Write clean, testable code while leveraging AI tools to supercharge your productivity and maintain high-quality standards.
• Performance Optimization: Optimize components for maximum performance and responsiveness, especially for data-heavy and real-time crypto interfaces.

Your AI-Native Advantage

We believe AI is a powerful co-pilot for modern development. We're looking for someone who:

• Is eager to use AI to supercharge their daily work and development speed.
• Constantly explores new ways to integrate AI/LLM capabilities into the product lifecycle.

Who You Are

You are a proactive, detail-oriented, and adaptable developer who thrives in a fast-paced environment. You are:

• A Clear Communicator: You can effectively articulate technical decisions and AI-driven solutions to both technical and non-technical teammates.
• A Problem-Solver: You are self-motivated, resilient, and enjoy tackling complex technical puzzles to build robust solutions.
• A Tech Visionary: You have a curious mindset with a strong interest in (or passion for) blockchain, cryptocurrency, and AI technology.
• A Team Player: You value collaboration and feedback, contributing positively to the team's shared goals.

Qualifications

• English: Upper-Intermediate level or higher (both written and verbal).
• Experience: 2+ years of professional software development experience, with a strong focus on building products.
• Technical Stack:
  • Proficiency in Node.js/Nest and TypeScript.
  • Experience with MySQL, Redis and AWS.
  • Familiarity with RESTful APIs and real-time data communication (WebSockets).
  • Experience with React/Next. 
  • Proficient with Git version control and collaborative workflows.
• Education: A Bachelor's degree in Computer Science or a related field (or equivalent practical experience).

Bonus Points:

• Experience working in Fintech, Trading, Blockchain, or Crypto.
• Demonstrated experience in building features that utilize AI/LLM APIs.

We Offer

• Health & Wellness: Medical Insurance in Ukraine and Multisport program in Poland.
• Flexibility: Flexible working hours and offices in Ukraine and Poland (Wroclaw).
• Career Growth: Mentoring, educational programs, and English classes up to three times a week.
• Work-Life Balance: Paid vacation, sick leaves, and all official holidays.
• Support: All necessary equipment provided and tax/accounting services for Ukrainian contractors.
• Culture: Regular corporate activities (parties, team buildings, sports events) and an advanced bonus system.

Want to work at the cutting edge of modern technology and artificial intelligence? We have something just for you.

We are looking for a Node.js engineer who is not only confident in backend development but also has a genuine interest in AI integrations, LLM agents, and new automation technologies. This role involves participating in the creation and development of AI assistants, platforms, and interfaces that help businesses be more efficient.

What to expect:

• Regular technical challenges — a new case from a customer every week
• Flexible use of AI tools (OpenAI API, WhatsApp/Telegram API, OCR, N8N, scrapers)
• Hands-on experience with workflow automation platforms, particularly N8N, for creating complex business process automations
• Building end-to-end AI workflows that connect multiple services and APIs
• Opportunity to experiment with emerging AI technologies and automation tools as they become available

Our main requirements are:

• Experience in hands-on programming 3+ years
• Experience doing Node.js (Vanilla/Typescript)
• Experience with NestJS also and/or NextJS and/or Express
• Strong creating with SQL/NoSQL databases efficient design from scratch as well as performing optimizations
• Strong knowledge in Computer Science: data types, data structures, algorithms
• Being proficient working on modern tech stack: Docker, Kubernetes, CI/CD, IaC (e.g. Terraform), Ansible etc.
• Having a wide strong background working with AWS (smth beyond EC2 and S3)
• Understanding and applying software design principles
• Experience designing software systems (distributed, high availability, resilient)
• Comfortable working Agile and Design Thinking (however understanding that pure Agile is a myth)
• Being comfortable in several projects at once (taking apart hands-on aspect)
• Strong communication skills in English (B2 and better)
• Willingness and enthusiasm to learn workflow automation tools (especially N8N) and adapt to rapidly evolving AI technologies

Will be considered as a plus:

• Experience with modern SPA frameworks like React/Vue.js/Angular
• Experience with NestJS
• Experience writing technical documents, tracking technical debt, understanding refactoring etc.
• Experience working with AI libraries and/or 3rd parties like chatGPT, Claude, Gemini or Perplexity
• Previous exposure to workflow automation platforms (N8N, Zapier, Make.com, or similar)
• Experience with RAG implementations, vector databases, or knowledge management systems
• Familiarity with MCP (Model Context Protocol) or similar AI integration standards
• Understanding of prompt engineering and AI agent behavioral design
• Experience building conversational AI interfaces or chatbots

Hiring process:

• HR interview: we’ll talk about your professional background, the specifics of the position we are offering, and address any questions you might have.
• Tech interview: a deeper look into your technical expertise and problem-solving approach, ensuring your skill set aligns with our project’s needs.
• Interview with the C-Level: a conversation focused on the company’s vision, strategic goals, and how your role aligns with them.
• Feedback
• Job offer

What we offer at iForAI:

• Hardware Policy: Get the gear you need, from laptops to PCs.
• Referral Bonus: Invite talent and earn a generous reward.
• Professional Growth: We cover courses and books to fuel your expertise.
• Tasty Perks: Free lunches, snacks, tea, and coffee to stay energized.
• Birthday & Celebrations: Gifts on your day, plus parties and team-building.
• Life Events Support: Wedding bonuses, childcare support, and more.
• Volunteering Days: Extra days off to help your community.
• Work-Life Balance: 18 paid vacation days, 10 paid sick days, and national holidays off.

We are looking for a Senior Full Stack Developer on behalf of our client, an Israeli deep tech company building a cloud-native platform for monitoring critical infrastructure at scale. The company operates at the intersection of industrial intelligence, real-time monitoring, and enterprise software, helping utilities, energy providers, and infrastructure operators detect threats, anomalies, and operational events across pipelines, power lines, railways, and perimeter assets. Its production platform processes continuous streams of sensor data, applies machine learning-driven classification, and delivers actionable insights through a sophisticated command-and-control interface integrated with enterprise systems such as SCADA and Digital Twins.

In this role, you will work across the stack with a strong frontend focus, building the user-facing applications that power maps, dashboards, real-time alerts, and operational workflows used daily by enterprise customers and field teams. This is a long-term opportunity to contribute to a live, technically advanced product with real-world impact and large-scale deployment.

Responsibilities:

• Design and deliver scalable, high-performance full stack applications from architecture through production.

• Build modern, responsive, and data-rich frontend applications using Next.js, React, TypeScript, and component-driven UI approaches.

• Develop backend services, APIs, and business logic with NestJS in a cloud-native environment.

• Own frontend-heavy features end to end, including architecture, implementation, testing, deployment, and ongoing optimization.

• Create intuitive user experiences for complex operational data, including geospatial and map-based interfaces, dashboards, and alerting workflows.

• Collaborate closely with product managers, R&D teams, and domain experts to translate technical and operational needs into robust software solutions.

• Improve performance, reliability, scalability, and security across AWS-based infrastructure running on Docker and Kubernetes.

• Leverage modern AI-assisted engineering tools to accelerate development, enhance code quality, and improve delivery efficiency.

• Participate in architectural discussions, code reviews, and engineering best practices while mentoring other developers.

Requirements:

• 7+ years of experience as a Full Stack Developer or in a similar senior software engineering role.

• Strong hands-on expertise in frontend development with Next.js, React, and the broader TypeScript ecosystem.

• Proven experience building complex, data-heavy, user-centric web applications with a strong emphasis on performance and usability.

• Solid backend development experience with NestJS, RESTful APIs, and service-oriented or microservices-based architectures.

• Excellent proficiency in TypeScript across both frontend and backend layers.

• Hands-on production experience with AWS services such as Lambda, ECS or EKS, S3, RDS, and related cloud-native infrastructure patterns.

• Strong experience with Docker and Kubernetes for containerization, orchestration, and scalable deployment.

• Experience working with modern UI libraries and design systems such as Chakra UI or similar component frameworks.

• Practical experience with Cypress or comparable testing frameworks for end-to-end and frontend testing.

• Experience building map-based or geospatial interfaces and visualizing real-time operational data.

• Familiarity with SQL and/or NoSQL databases and sound understanding of data modeling for high-throughput systems.

• Strong understanding of system design, scalability, reliability, and secure software development practices.

• Active experience using AI-powered developer tools such as Claude Code, Code Rabbit, or similar to improve engineering productivity and code quality.

• Relevant higher technical education in Computer Science, Software Engineering, or a related field.

• Upper-Intermediate or higher English communication skills, with the ability to work effectively in cross-functional international teams.

• Strong ownership mindset, excellent problem-solving abilities, and readiness to take full responsibility for end-to-end feature delivery.

• Experience thriving in startup or fast-paced product environments.

Nice to have:

• Experience with microservices architecture in cloud-native production systems.

• Familiarity with Python and Dash for data-centric or analytical applications.

• Background in performance optimization, distributed systems, or real-time event-driven platforms.

• Experience integrating enterprise environments such as SCADA systems, Digital Twins, or industrial monitoring platforms.

This position is ideal for a senior engineer who enjoys owning meaningful product features, solving complex technical challenges, and building software that supports the safety, resilience, and operational efficiency of critical infrastructure worldwide.

Are you a skilled Backend Developer passionate about cutting-edge IoT solutions? We at Sigma Software invite a Middle-level professional to join our team, working on an innovative smart building automation platform. This role offers flexibility — you can work remotely or onsite in Tashkent, Uzbekistan. 

In this position, you will contribute to a project that is actively transforming building management through real-time data, automation, and sustainability-focused solutions. You will work with modern technologies and have the opportunity to influence architecture and integrations. 

Why join us? At Sigma Software, you will be part of a collaborative environment, enjoy challenging tasks, and contribute to impactful projects that make a real difference in energy efficiency worldwide. 

CUSTOMER 
Our Customer is a leading IoT-based building management platform that empowers property owners and technical experts to make data-driven decisions. The solution focuses on real-time monitoring, automation, and sustainability, helping optimize energy usage and operational efficiency. 

PROJECT 
The project leverages smart building automation to translate real-time data into opportunities that align with operational, sustainability, and compliance objectives. As a result, large commercial buildings have achieved up to 30% reduction in energy consumption. 

Job Description

• Design, develop, and maintain backend services using TypeScript and NestJS within a microservices architecture 
• Integrate third-party services and APIs into the platform, ensuring high reliability and performance 
• Work with PostgreSQL, MongoDB, and Redis for efficient data storage and retrieval 
• Collaborate with cross-functional teams to deliver new features for the platform’s new product 
• Participate in the full software development lifecycle, from requirements analysis to deployment and support 
• Support DevOps activities, including CI/CD processes, infrastructure setup, and monitoring 
• Monitor and optimize application performance, scalability, and security 
• Troubleshoot and resolve technical issues 
• Ensure code quality by following best practices and project conventions 
• Contribute to improving team processes and technical documentation 
• Proactively identify and communicate risks, blockers, and improvement opportunities 
• Adapt to changing requirements and priorities 

Qualifications

• At least 2 years of commercial experience in backend development with JavaScript/TypeScript stack 
• Strong experience with Node.js and NestJS 
• Experience integrating third-party services and APIs 
• Proficiency with PostgreSQL, MongoDB, and Redis 
• Familiarity with microservices architecture and messaging systems (RabbitMQ) 
• Upper-Intermediate English level 
• Strong communication and teamwork skills 
• Ability to work proactively and independently 
• Experience collaborating in cross-functional teams 

WILL BE A PLUS

• DevOps experience (Docker, Kubernetes, Terraform) 
• AWS services (EC2, VPC, S3, Step Functions, Lambda, IAM, Cognito) 
• Experience with Grafana, Prometheus, GitHub Actions 
• Knowledge of Kafka, GraphQL, Linux 
• Experience with real-time data processing and/or EV charger integration 

PERSONAL PROFILE

• Strong self-organization skills with efficient task management 
• Ability to prioritize tasks to meet project goals 
• Proactive in identifying and resolving blockers 
• Clear and open communication with team members and stakeholders 
• Transparency in work progress and outcomes 
• Comfortable working in a dynamic environment with evolving requirements 

On behalf with our customer we are seeking for FS Node Team Lead to join our global R&D department in Poland.

Our customer is an innovative technology company led by data scientists and engineers devoted to mobile app growth. Their proprietary ad platforms powered by machine learning are the outcome of that devotion.
They reward talents, employees support each other to advance individually and as a team.

Responsibilities

● Design, code, and manage large scale, highly available, real-time (low latency) services using cutting edge technologies (Node.js, React, Redis, Kubernetes, etc. over AWS).
● Lead and mentor a team of around 4 members, abroad, and performing code reviews to other team members.
● Work with stakeholders including the Executive, Product, Data, and Design teams to craft the most optimal solutions for our problems.
● Design and develop APIs or integrate with 3rd party APIs
● Manage a time-efficient sprint plan. Plan, groom and manage the present sprint and the upcoming ones with Product
● Understand and implement security and data protection needs, and assist in-house teams and supply creative solutions for various problems.

Requirements

● 6+ years of coding experience in Backend NodeJS 
● 2+ years of management experience
● Working knowledge with SQL and NoSQL databases
● Working with one of the cloud providers: AWS, Google, Microsoft
● Experience with Kubernetes
● Experience in the software life cycle and knowing how to work in an agile environment
● Can-do attitude, self-sufficient, capable of learning alone and good English


What We Offer

● Working schedule Sunday-Thursday - must have
● Accounting support & consultation
● Opportunities for learning and developing on the project
● 20 working days of annual vacation
● 5 days paid sick leaves/days off; state holidays
● Provide working equipment

Overview
We are seeking experienced Full Stack Developers to join a collaborative product development initiative focused on building and expanding a modern, AI-driven solution. This role involves working closely with a small, highly capable team to deliver scalable, cloud-based applications that integrate seamlessly into an existing platform. The project emphasizes innovation, long-term development, and the use of cutting-edge tools and practices.
 

Key Responsibilities

• Design, develop, and maintain full-stack applications using React (front-end) and Node.js (back-end).
• Contribute to the development of cloud-native solutions hosted on AWS, ensuring scalability and reliability.
• Collaborate with team members to build AI-driven features and integrate modern development approaches.
• Utilize Generative AI tools (e.g., Cursor, Claude Code, Windsurf, or similar) to improve productivity and code quality.
• Implement and maintain CI/CD pipelines, following best practices in modern software delivery.
• Write clean, maintainable, and efficient code while ensuring application performance and security.
• Participate in Agile development processes, including planning, reviews, and iterative delivery.
   

Requirements

• Strong proficiency in React and Node.js; Python experience is a plus.
• Hands-on experience with Generative AI tools and familiarity with AI-assisted development workflows (required).
• Experience building and deploying applications in AWS or similar cloud environments.
• Understanding of scalable architecture, secure coding practices, and high-performance systems.
• Experience working in Agile, fast-paced environments.
• Strong collaboration skills and experience working within established development teams.
   

Preferred Qualifications

• Experience with agentic-style development or AI-driven product development.
• Familiarity with data-related tools such as Jupyter notebooks or cloud-based analytics platforms.
• Proven ability to work on long-term, evolving product ecosystems.
   

Project Details

• Long-term product development with an expected initial duration of approximately 2 years and potential for ongoing engagement.
• Focus on building a new product integrated into an existing solution.
• Team structure begins small, enabling strong collaboration and cohesive development practices.
   

Location & Availability

• Preference for candidates located within or near Eastern Europe (within ±3 hours of CET).

About the Role

We are looking for a Senior Engineer who combines Full-Stack and Data Engineering expertise.

This is a hybrid role where one person covers both:

• Full-Stack development (Node.js + React)
• Data layer ownership (SQL Server, data access, troubleshooting)

The role is highly hands-on and involves working across multiple layers of a complex system, with a strong focus on production stability and customer-facing troubleshooting.

Responsibilities

• Maintain and develop Node.js APIs and React frontend
• Work with GraphQL and support full-stack feature delivery
• Own and maintain the data layer (Microsoft SQL Server)
• Implement and optimize data access logic using TypeScript
• Investigate and resolve data-related and application issues
• Participate in live troubleshooting sessions with customers
• Ensure system stability across frontend, backend, and database layers
• Collaborate with engineering and product teams on improvements

Tech Stack

• Backend: Node.js (Hapi.js), TypeScript
• Frontend: React.js, MobX
• API: GraphQL
• Database: Microsoft SQL Server
• Additional: C# (data ingestion & analysis layer)

Requirements

• Strong experience with Node.js and TypeScript
• Solid frontend experience with React.js
• Strong knowledge of SQL and database design (MS SQL Server preferred)
• Experience working with data access layers and data troubleshooting
• Hands-on experience with production systems and debugging
• Experience in customer-facing environments (calls, troubleshooting)
• Ability to work across both application and data layers
• Fluent English (C1)

Nice to Have

• Experience with GraphQL
• Experience with complex or legacy systems
• Exposure to C# or data ingestion systems

Hiring Process

• Intro
• Technical interview (with live coding)
• Final interview (technical + interpersonal)

We are evolving very quickly and now we’re looking for active and motivated Back-end developer to join our friendly team. 

Required Technologies / Frameworks: 
NestJS
Socket.IO
Swagger
Mongoose
MongoDB
Docker

Requirements:
2+ years of software development experience;
1+ years of experience with Node.js and NestJS;
Strong understanding of OOP principles and modern development practices;
Experience with Git;
Willingness to learn and grow with new technologies.

Responsibilities:
Developing new features for our products;
Maintaining and improving existing services;
Working with APIs and integrations;
Ensuring code quality and compliance with standards.

We offer:
Comfortable office in center of the city;
Competitive salary based on experience;
Paid sick leave;
24 days paid holiday. 

Test task required for the position. 

Just send your CV!