Jobs Node.js

Skills

• Commercial experience in software development projects
• Working experience with Next.js, React, Tailwind, PostgreSQL, Prisma
• Strong knowledge of JavaScript, Data Algorithms and Structures
• Hard-working, smart, proactive, goal oriented, open in communication, not afraid to voice your own opinion
• Willing to take part in business and design decisions and analysis
• Experience with Python - preferable
   

Do not hesitate to apply if you are missing specific experience.

We Offer

• WFH and flexible working hours

Requirements

• Develop new features and improve existing ones for Valid-X 's products.

• Proactively take part in design and marketing discussions, take responsibility for products from the technology side.

   

Project description

• Social wiki platform website (similar to Wikipedia and Fandom)
• Tech stack: Next.js, Node.js, PostgreSQL, Prisma, Vercel

• Other projects

   

We are looking for a Full Stack Developer with a focus on Back-End.
Remote work format (We consider candidates who live geographically in Ukraine and do not plan to go abroad)

Requirements:

— 1+ year of commercial experience in the industry.

— Full-stack experience designing.

— Excellent JavaScript/TypeScript skills and strong proficiency in React.
— Experience with Next.js will be a plus.

— Familiarity with the MERN stack and experience with Nest.js will be a plus.

— Familiarity with building back-end APIs, monolith and microservice applications.

— Experience using RESTful APIs and basic authentication mechanisms.

— Ability to showcase previous work via live web pages and Github/Gitlab/Bitbucket.‍

— Upper-intermediate English proficiency, with the ability to effectively communicate technical issues and discuss project requirements.

Soft Skills:

— Excellent problem-solving skills;

— Strong communication and collaboration abilities;

— Ability to work independently and within a team;

— Detail-oriented and organized.

Cooperation format:
 

- Outstaff, transparent business model, full-time

- Projects via Upwork with foreign clients

We offer:

– Projects with foreign clients

– Growth prospects in FullStack (React, Next.js)

– Frontend mentoring and team support

– Transparent model: outstaffing, stable employment

– Comfortable atmosphere without micromanagement

— Work within a friendly team;

— Fixed salary $

— Paid vacation and sick leave;

— Required technical literature available on demand;
— Do you want a cool workshop, seminar or conference — come, talk and trip!

We are looking for a skilled Back-End Developer with strong expertise in TypeScript and NestJS to join our core engineering team. 
You will work on building and scaling a FinTech crypto-banking platform that powers acquiring, payouts, and corporate card solutions for businesses. 
If solving complex technical puzzles, optimizing systems, and shaping products that real companies use every day sounds exciting - this is the place where your skills will truly make an impact 🚀

Requirements:

• 4+ years of experience with server-side JavaScript/TypeScript
• Deep understanding of TypeScript and JavaScript and their inner workings
• 4+ years of professional experience with Node.js, primarily using the NestJS framework
• Experience in implementing complex algorithms in the FinTech domain
• Hands-on experience with large-scale enterprise projects and active participation in their development
• Proficiency with MySQL/PostgreSQL (3+ year)
• Understanding of database optimization and performance (which CRUD operations are the most resource-intensive, how composite keys work, when to use materialized views, and the difference between global and local indexes)
• Designing complex and scalable databases
• Optimizing complex SQL queries
• Implementing interaction between multiple tables and instances
• Strong knowledge of architectural patterns, data structures, and algorithms
• Experience with Docker, containerization, and orchestration tools
• Ability to write unit, integration, and end-to-end tests
• Strong analytical skills, critical thinking, and problem-solving abilities

Nice to have:

• Experience in designing or developing accounting CRMs, or knowledge of the double-entry bookkeeping model (credit/debit), would be a significant advantage (either one)
• Basic-level experience with Web3 integrations (1+ year)
• Experience integrating with banking APIs and financial institutions
• Previous work on banking platforms
• English level Intermediate or higher
• Knowledge of security principles, consensus algorithms, and cryptography

What Balancify offers:

• Competitive compensation
• Flexible working schedule
• Social package (30 working days of annual leave)
• Challenging and engaging FinTech project with a diverse tech stack
• Opportunities for personal development and professional growth
• Work with talented, ambitious, and collaborative teams
• Educational opportunities: corporate courses, knowledge bases
• Compensation for professional certification and support for learning activities
• Corporate social responsibility initiatives

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

We are building a next-generation ecosystem with a blockchain as its foundation, a non-custodial wallet, and a stablecoin protocol. After a successful demo, the project is now preparing the core components (blockchain + stablecoin) for launch. In parallel, development has started on additional secured projects, including:

• A document management system,
• A country-specific solution,
• An e-invoicing platform,
• And several other ecosystem modules ready to begin.

Tech Stack

• Node.js / TypeScript, NestJS
• PostgreSQL, Redis / Valkey
• L2 blockchain (interaction with other networks)
• Docker, Kubernetes (bare-metal & cloud infrastructure)

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

• 4+ 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 are looking for a skilled Back-End Developer with strong expertise in TypeScript and NestJS to join our core engineering team. 
You will work on building and scaling a FinTech crypto-banking platform that powers acquiring, payouts, and corporate card solutions for businesses. 
If solving complex technical puzzles, optimizing systems, and shaping products that real companies use every day sounds exciting - this is the place where your skills will truly make an impact 🚀

Requirements:

• 5+ years of experience with server-side JavaScript/TypeScript
• Deep understanding of TypeScript and JavaScript and their inner workings
• Experience working with the NestJS framework
• Experience in implementing complex algorithms in the FinTech domain
• Hands-on experience with large-scale enterprise projects and active participation in their development
• Proficiency with MySQL/PostgreSQL
• Designing complex and scalable databases
• Optimizing complex SQL queries
• Implementing interaction between multiple tables and instances
• Strong knowledge of architectural patterns, data structures, and algorithms
• Experience with Docker, containerization, and orchestration tools
• Ability to write unit, integration, and end-to-end tests
• Strong analytical skills, critical thinking, and problem-solving abilities

Nice to have:

• Practical experience in Web3/Blockchain (basic integrations are sufficient, not a top priority)
• Experience integrating with banking APIs and financial institutions
• Previous work on banking platforms
• English level Intermediate or higher
• Knowledge of security principles, consensus algorithms, and cryptography

What Balancify offers:

• Competitive compensation
• Flexible working schedule
• Social package (30 working days of annual leave)
• Challenging and engaging FinTech project with a diverse tech stack
• Opportunities for personal development and professional growth
• Work with talented, ambitious, and collaborative teams
• Educational opportunities: corporate courses, knowledge bases
• Compensation for professional certification and support for learning activities
• Corporate social responsibility initiatives

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

We are building a next-generation ecosystem with a blockchain as its foundation, a non-custodial wallet, and a stablecoin protocol. After a successful demo, the project is now preparing the core components (blockchain + stablecoin) for launch. In parallel, development has started on additional secured projects, including:

• A document management system,
• A country-specific solution,
• An e-invoicing platform,
• And several other ecosystem modules ready to begin.

Tech Stack

• Node.js / TypeScript, NestJS
• PostgreSQL, Redis / Valkey
• L2 blockchain (interaction with other networks)
• Docker, Kubernetes (bare-metal & cloud infrastructure)

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

• 6+ years of experience with server-side JS/TS;
• Perfect understanding of TypeScript, JavaScript fundamentals, and internals;
• Strong experience with NestJS;
• Experience with various ORMs;
• Understanding of different types of scaling and microservice architectures in its different implementations;
• Expertise in data structures, algorithms, and software and architectural design patterns;
• Proven ability to make architectural decisions and foresee potential issues that different decisions may cause;
• Proven ability to develop large ecosystem products with shared components;
• Expertise with popular EVM-compatible blockchains (L1/L2s) and understanding of their internal mechanics;
• Experience with various database engines (both relational and non-relational), including schema/query design and validation;
• Ability to choose and apply other technologies when needed (beyond JS/TS and their frameworks);
• Experience with Docker, containerization, orchestration tools, and familiarity with DevOps practices and Infrastructure-as-Code (IaC) tools);
• Experience with production systems and their lifecycle;
• Strong analytical and problem-solving skills;
• Proven ability to manage several cross-functional teams of varying sizes with partially shared responsibilities;
• Proficiency in writing unit, integration, and end-to-end tests;
• Conversational English.

Will be a plus

• Understanding of consensus algorithms, cryptographic principles, and decentralized applications (dApps);
• Familiarity with Matterlabs’ zk stack;
• Experience in FinTech domain;
• Understanding of how different rollup technologies work;

• Openness for technology stack change and adaptiveness.
   

  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.

Description

Development & maintenance of the content management services (frontend and backend) for an international broadcasting company headquartered in New York, US. The company owns several television channels/brands, developed state-of-the-art TV streaming applications for Android TV, Android Mobile, Apple TV, and Fire TV platforms, and wants to improve its content management services.

Requirements

We’re excited if you have

• 4+ years of development experience building backend services
• Good culture fit and excellent team player
• Strong level knowledge of Node.js, Typescript, JavaScript (jQuery, React, etc.)
• Knowledge of the latest open standards and web technologies
• Experience with AWS (SQS, SNS, S3, Lambda, Step Functions, Batch, CloudWatch)
• Experience with RESTful APIs & Microservices
• Strong verbal and written communication skills.
• BS or MS degree in Computer Science or equivalent

Nice to have:

• Experience with PHP 7/8
• Experience with Next.js
• Experience with any of CMS platforms (WordPress, Drupal, Magento, etc.)

• E-commerce experience or analytics or authentication & identity services

   

Working hours:

This position requires the candidate to provide an overlap with the EST (New York) timezone by working daily until 20:00 Kyiv time (GMT+2).

Job responsibilities

What you’ll be doing

• Build innovative features in the media domain areas
• Code, test, document and deliver features in the Content Management domain with high-performance and availability in mind
• Enhance existing and create new features using JavaScipt, and Node.js both for frontend and backend
• Participate in Agile development process, including scoping, technical design, estimation effort, coding, testing, debugging, code reviews, maintenance and support
• Collaborate with program managers, marketing, designers, and QA engineers

We are looking for a talented Senior Software Engineer to join a global R&D team and contribute to the development of an innovative Continuous Delivery platform. This role is ideal for someone passionate about solving complex problems, improving developer experiences, and delivering high-quality CI/CD solutions.

Responsibilities:

• Take ownership of the full lifecycle of backend components: research, design, development, testing, deployment, and monitoring.
• Participate in handling critical customer issues, investigations, and delivering fixes collaboratively with support teams and customers.
• Contribute to platform security by identifying and resolving vulnerabilities.
• Improve monitoring, traceability, and debuggability of internal systems.
• Identify technical challenges, enhance architecture, code quality, and platform stability.
• Mentor team members, share knowledge, and foster continuous growth.

• Actively contribute to technical discussions and collaborate on strategies for scalable, high-quality solutions.

   

Requirements:

• 5+ years of professional experience in large-scale backend development, with strong expertise in Node.js.
• Familiarity with GoLang and willingness to grow in this area.
• Solid experience with Docker and Kubernetes, including designing and managing containerized applications. Experience with Docker/K8s APIs is a plus.
• Strong experience with MongoDB; familiarity with Postgres, Redis, and RabbitMQ is a plus.
• Hands-on experience with cloud platforms and microservices architectures.
• Practical knowledge of CI/CD concepts.
• Strong problem-solving skills, proactive mindset, and ability to tackle both complex and routine tasks.
• Excellent verbal and written communication, able to explain technical concepts clearly and collaborate effectively.
• Able to work independently while thriving in team-driven environments.

• Bachelor’s degree in Computer Science, Engineering, or a related field is preferred.

   

What we offer:

• 20 working days’ vacation; 
• 10 paid sick leaves;
• public holidays;
• equipment;
• accountant helps with documents;
• many cool team activities.

Вимоги до володіння мовами

English

B2 

Job Description

This is a remote position. We are looking for a talented and motivated Software Engineer with a strong background in Node.js to join our team. The ideal candidate will have over 3 years of experience in software development and be eager to learn and take on new challenges

Responsibilities:

• Develop and maintain server-side applications using Node.js.
• Collaborate with cross-functional teams to define, design, and ship new features.
• Troubleshoot and debug applications to ensure the highest quality of software.
• Stay updated with the latest industry trends and technologies to bring new ideas to the table.
• Participate in code reviews and contribute to our continuous improvement process.
• Take on interesting challenges and learn new technologies as needed.

Requirements:

• 3+ years of experience in software development, with a strong focus on Node.js
• Proficiency in Python and PHP is a significant advantage
• Hands-on experience with MySQL
• Strong skills in analyzing data from various sources to identify patterns, anomalies, and insights related to fraud and risk
• Strong problem-solving skills and the ability to work in a fast-paced, startup environment
• Excellent communication and collaboration skills
• A proactive attitude towards learning and tackling new challenges

What We Offer:

• A collaborative and dynamic work environment with minimal bureaucracy, allowing for quick decision-making and efficient workflows
• Opportunities for professional growth and development.
• The chance to work on cutting-edge technologies and challenging projects
• Competitive salary and benefits package.
• Flexibility in work hours and location

We search for a «willing to learn» person who wants to learn and develop enterprise-level web applications/websites.

Skills & Requirements:

• You’ve got at least 1 year of experience in JavaScript

• You’ve worked with some of the modern JavaScript frameworks — Vue.js

• You have experience with Node.js

• You have experience with PostgreSql 

• You feel comfortable communicating in English

• You’re passionate about solving new problems

• You are always looking for the best solution

We are offering:

-Senior team;

-Regular review;

-Long-term employment;

-Challenging projects;

-Certifications;

Responsibilities:

-Code review.

-Functionality improvements to an existing solution

-Increasing system stability, testability, maintainability, and security

Company is revolutionizing e-commerce advertising by connecting post-purchase shoppers with relevant cross-sell opportunities. Their platform powers promotional ad experiences that appear immediately after checkout — helping shoppers discover complementary products while helping merchants drive incremental revenue.

As a Backend Data Engineer (Snowflake Focus), you’ll design and own the systems that transform massive volumes of checkout data into actionable insights for company platform and partners. You’ll work across data pipelines, analytics models, and backend systems that power real-time reporting and optimization.

What You’ll build:

• Design and maintain ETL/ELT pipelines from PostgreSQL and event streams into Snowflake.
• Develop scalable data models and real-time analytics systems that power insights for our teams and customers.
• Build APIs and internal SDKs that surface metrics and intelligence across Falcon’s platform.
• Automate workflows for data ingestion, transformation, and reporting to ensure reliability and observability.

Requirements:

• 5+ years of backend or data engineering experience.
• Strong expertise in SQL and Snowflake (schema design, optimization, and performance tuning).
• Experience building or maintaining ETL pipelines and data workflows.
• Comfort bridging backend systems with analytics workloads and business logic.
• A mindset focused on data quality, observability, scalability, and performance.
• Experience with Snowflake is a must.

Our Tech Stack:
Tech stack:

Node.js, PostgreSQL, Snowflake, dbt, Airbyte, Redis, AWS, Terraform, Docker, Sentry, TypeScript.

What We Value:

• Speed + Quality: You ship fast but care deeply about maintainability.
• Ownership: You identify problems and deliver solutions autonomously.
• Curiosity: You experiment with new tools and make data-driven decisions.
• Collaboration: You challenge ideas, communicate openly, and align quickly around outcomes.

We are building a new high-impact CRM platform operating in an extremely sensitive, high-security environment.

While the product itself is not a cybersecurity tool, it will handle confidential data and communications, requiring uncompromising discipline in secure development, and controlled access across every layer of the backend infrastructure.

The project follows a Spec-Driven Development (SDD) methodology — all functionality is defined, documented, and validated before implementation.

All code is preffered to be developed in LLM-assisted environments (e.g. Cursor, VS Code + Copilot) using Model Context Protocols (MCPs) to ensure rapid, accurate, and traceable delivery.

Our mission: high-velocity, high-quality, fully secure backend code within a tightly isolated development ecosystem.

✅ Core Requirements

• 4+ years of professional back-end development experience with Node.js / Nest.js (TypeScript preferred).
• Proven track record of building secure, scalable API-driven systems, microservices, and modular architectures from the ground up.
• Solid command of relational databases (PostgreSQL, MySQL) and ORM tools (Prisma, TypeORM).
• Proficiency in REST / GraphQL API design, integration, and testing.
• Experience with authentication, authorization, and access control mechanisms (JWT, OAuth2, RBAC).
• Confident in asynchronous processing, job queues, and event-driven systems.
• Working knowledge of Docker, containerized workflows, and basic CI/CD pipelines.
• Competence with testing frameworks (Jest, Mocha, Supertest) and maintaining reliable test coverage.
• Experience with Spec-Driven Development (SDD) — implementing precisely from specs and maintaining traceability across all tasks.
• Proficiency in LLM-assisted workflows (Cursor, Copilot, Claude, GPT, etc.) for coding, testing, and refactoring.
• Understanding of Model Context Protocols (MCPs) — and how they integrate with AI-assisted development environments.
• Solid grasp of secure SDLC principles:
  • Secrets & credential management
  • Encrypted data storage and transmission
  • Access control & privilege isolation
  • Secure CI/CD pipelines and deployments
  • Code audit & compliance readiness
• Highly self-managed and delivery-oriented mindset.

⚙️ Responsibilities 

• Implement and maintain secure, high-performance backend modules following detailed specs.
• Integrate APIs, data models, and services within the defined system architecture.
• Collaborate with analysts and QA to ensure every delivery meets spec and security standards.
• Use AI-assisted tools (Cursor, Copilot, MCPs) to improve speed, consistency, and maintainability.
• Participate in code reviews and contribute to continuous improvement of backend architecture.
• Maintain clear, versioned documentation aligned with SDD processes.

🧱 Nice to Have

• Experience in microservices, event-driven systems, or message queues (RabbitMQ, Kafka).
• Familiarity with DevOps tools (Docker Compose, GitHub Actions, Render, Vercel, etc.).
• Exposure to cryptography, secure APIs, or compliance-driven systems.
• Experience with high-load optimization or real-time data handling.
• Background in cybersecurity, penetration testing, or threat modeling.
• Mentorship or leadership experience within small distributed teams.

What we're looking for

We’re looking for a Middle Software Engineer who is passionate about clear communication, high-quality documentation, and building modern, scalable systems using TypeScript and Azure.

You’ll work on solutions that integrate with IoT devices and healthcare systems—creating secure, cloud-based infrastructure to collect, process, and act on real-world data. As one of the earliest members of the engineering team, you’ll help shape our technical strategy and lay the foundation for sustainable, long-term scale.

You are expected to proactively use AI-assisted tools (like Cursor, ChatGPT, and others) to support your work in coding, documentation, testing, debugging, and technical research.

Requirements: 

• 3+ years of development experience in general 
• Strong proficiency in TypeScript. Experience with other languages is a plus.
• Solid experience building and consuming REST APIs and working with JSON/XML data formats.
• Hands-on experience with Azure, especially deploying and maintaining App Services.
• Familiarity with Agile development and DevOps practices.
• Strong problem-solving and debugging skills.
• Excellent communication skills in English, both written and verbal.

What you'll do

1. Communicate clearly and document proactively — from architecture decisions and design proposals to clean, readable code. You help raise the communication bar across the team.
2. Maintain scalable services and applications using TypeScript (Node.js, Azure Functions) in Azurebased environments.
3. Use AI tools to accelerate and enhance your development workflow, from concept to production.
4. Develop and support cloud-native solutions using Azure services such as App Services, Functions, Blob Storage, and Azure DevOps Pipelines.
5. Build and consume APIs and integrations using REST, JSON, XML, and other common formats.
6. Implement and improve CI/CD pipelines and automate DevOps workflows for efficient, reliable deployments.
7. Collaborate cross-functionally with product and implementation managers, Salesforce developers, and QA to deliver high-impact, end-to-end solutions.
8. Monitor, troubleshoot, and optimize production systems for performance and reliability.
9. Contribute ideas and feedback that improve the product, system architecture, and engineering practices.

What could be an advantage

• Experience with data engineering — we move and transform a large volume of data.
• Knowledge of event-driven architectures — core to our infrastructure design.
• Experience designing high-availability, fault-tolerant systems, especially in health tech or fintech contexts.
• Experience with health care specific data models like FHIR and ECD/EPDs.
   

Remote full-time position. Freelance contract.

Tech Stack:
• Backend: Node.js with Nest.js
• Database: PostgreSQL with RDKit integration, Prisma ORM
• REST, Swagger
• Unit & e2e tests

We offer:

• Cooperation with a stable company with well-established processes and a positive atmosphere
• Experience in project management of different levels of complexity, methodology, and approaches
• Flexible schedule: Mon-Fri (8 hours a day)
• 18 days of paid vacation; 15 days sick leave
• A decent level of remuneration with regular reviews of the results of cooperation
• Extensive loyalty program 

We’re looking for a Backend Developer experienced in Node.js and Nest.js 

Project domain: e-commerce for healthcare

Requirements:

• 2+ years of commercial backend experience
• Good understanding of SOLID principles
• Experience with Prisma ORM
• Experience with MongoDB (transactions, isolation, indexes, sharding, etc)

• Experience with GCP

   

Nice to have (but not mandatory):

• frontend experience (react.js)

• CI/CD configration experience