Jobs Node.js

Cowchain blockchain development company is actively looking for Backend Developer to join our development team.

About us:
Cowchain have successfully completed 150+ projects mainly on EVM-based blockchains such as Ethereum, Polygon, Arbitrum, Base including Coinmarketcap leaders with 180M+ total capitalization and 20M+ daily trading volume in Move2Earn, Play2Earn and DeFi industries.

Key Responsibilities

• Design and develop backend services using TypeScript and NestJS
• Build and maintain event-driven architectures using Kafka and Redis
• Implement and evolve transactional patterns:
  Saga, Idempotency, Ledger, Outbox / Inbox
• Develop blockchain-related logic:
  • Confirmation policies per chain
  • Nonce / sequence management
  • Fee management
  • Transaction de-duplication
  • Backfill and reconciliation processes
• Integrate and maintain multiple blockchain networks:
  Bitcoin, Ethereum, Solana, Tron, TON
• Work with RPC providers (QuickNode, Alchemy, PublicNode, TonOrbs, Blockstream)
• Ensure secure key management using HashiCorp Vault
• Build reliable financial and accounting flows with strong auditability
• Monitor and improve system reliability using Sentry and structured logging
• Participate in architectural decisions and technical planning

Requirements

• 4+ years of experience in backend development
• Strong proficiency in TypeScript and Node.js
• Hands-on experience with NestJS
• Solid understanding of distributed systems
• Experience with Kafka, Redis, and PostgreSQL
• Real-world experience with blockchain integrations
• Understanding of:
  • Transaction lifecycle on different blockchains
  • Confirmations, reorgs, nonces, fees
  • Financial consistency and reconciliation
• Experience with event-driven and fault-tolerant architectures
• Familiarity with security best practices (keys, secrets, access control)
• Ability to work independently and make architectural decisions

Nice to Have

• Experience in FinTech / Crypto / Payments
• Experience designing ledger-based systems
• Familiarity with AML/KYC integrations
• Experience with high-load or mission-critical systems
• Prior work with multi-chain platforms

What We Offer

• Work on a real production crypto-fintech system
• Flexible working schedule, remote work
• Modern tech stack and non-trivial engineering challenges
• Ability to dive into fast-growing blockchain/crypto industry
• Paid vacations, sick leaves
• Strong engineering culture
• 100% friendly/family team

Cowchain blockchain development company is actively looking for Solidity Developer to join our development team.

About us:
Cowchain have successfully completed 150+ projects mainly on EVM-based blockchains such as Ethereum, Polygon, Arbitrum, Base including Coinmarketcap leaders with 180M+ total capitalization and 20M+ daily trading volume in Move2Earn, Play2Earn and DeFi industries.

Required skills(optional):

• Around 1 year+ commercial experience in smart contract development on Solidity
• ERC721/ERC1155/ERC20/Chainlink
• JIRA, gitflow
• Node.js experience
• Web3/Etheres libraries

What will you do:

• Smart contracts development for DeFi, NFT, GameFi solutions
• Integration of smart contract to ReactJs frontend
• Bugfixes and support existing solutions
• Participate in project architecture discussions
• Build solutions from scratch as well as join on-going development process
• Have fun;) 

What we offer

• Flexible working schedule, remote work
• Competitive salary with bonuses for activities
• Ability to dive into fast-growing blockchain/crypto industry
• Work with modern tech stack (blockchain)
• Paid vacations, sick leaves
• 100% friendly/family team

Assignment description:

Our client, develops technical infrastructure for next-generation iGaming platforms. The company operates at the intersection of traditional backend development and modern, blockchain-based architecture, with a strong focus on transparency, performance, and scalability. 

The platform is used to build and operate casino products where large transaction volumes, data integrity, and reliability are business-critical. The company is in an expansion phase, with the product being further developed and scaled to serve more customers and handle increased load. 

To support this, we are now looking for a senior backend developer who wants to work closely with product and technology in a small, experienced team. This is an assignment for someone who enjoys building robust backend systems, working close to data, and taking responsibility for technical decisions in a product that is in active development and production. 

What you will do: 

-Develop and further evolve backend services in TypeScript / Node.js 

-Design, optimize, and maintain PostgreSQL databases for high performance and large data volumes 

-Work with APIs, data modeling, and business logic in production-critical flows 

-Collaborate closely with product, frontend, and other developers to deliver stable functionality 

-Contribute to architecture, code standards, and technical decision-making 

-Ensure high quality in terms of performance, security, and testability

About the team:

1 CTO & 4 other senior consultants. The team is constantly growing, and the current plan is to bring in 4 new developers.

Must-haves:

We are looking for someone who: 

-Has solid experience in backend development with Node.js and TypeScript 

-Is very comfortable working with relational databases, especially PostgreSQL 

-Has built and maintained production systems with high demands on stability and scalability 

-Thinks long-term about architecture, maintainability, and technical debt 

-Takes ownership, drives work forward, and communicates clearly within the team 

Tech stack: 

Backend: TypeScript, Node.js 

Database: PostgreSQL 

Infrastructure: AWS

Other requirements:

Nice to have: 

-Experience with systems handling high transaction volumes 

-Experience with cloud infrastructure (AWS) 

-Basic understanding of Web3/blockchains (not a requirement) 

-Previous experience working in product companies or fast-growing tech companies

About the customer:

The client is redefining the future of online casinos by merging iGaming with Web3. As a pioneer in the GambleFi space, we empower operators to launch high-performance casino sites with transparent, on-chain infrastructure, rapid deployment, and innovative player incentives. Our decentralized bankroll, inspired by Decentralized Finance (DeFi) principles, allows anyone to participate in the casino economy. We’re VC-backed and currently in the product validation phase, already generating revenues.

United Tech is a global IT product company shaping the future of real-time social connection. With millions of users across North America, Europe, LATAM, and MENA, we build next-gen mobile and web apps for live-streaming and social networking. Our platforms enable connection at scale fast, interactive, and deeply engaging. The market is projected to exceed $206B by 2030, and we are already leading the evolution. Founded in Ukraine, scaling worldwide

About your role: Join us in creating a next-generation global video chat platform. You will join at the start of product development, shaping its architecture and backend without the burden of legacy systems. This is your chance to influence key decisions, work on cutting-edge technologies, and create a cross-platform solution for web and mobile that will scale globally

In this role, you will

• Take part in team processes (grooming, sprint planning)
• Develop and deliver product tasks to the production environment
• Work on reducing and preventing technical debt
• Create technical designs for product epics
• Decompose epics into clear, executable tasks
• Conduct technical investigations and propose solutions

It’s all about you

• 4+ years of commercial experience in backend development
• 3+ years of experience with Node.js backend development
• Hands-on experience with relational and non-relational databases (MongoDB, Postgres, Redis)
• Strong background with SOA/Microservices (communication, development process)
• Solid understanding of patterns (DDD, event-driven, SOLID, CQRS)
• Experience working with WebSockets (ws, socket.io)
• Experience with messaging systems (BullMQ, RabbitMQ, Kafka)
• Cloud expertise (AWS, GCP, etc.)
• Proven track record in scaling and high-load products
• Upper-Intermediate English or higher

What we offer

Care and support:

• 20 paid vacation days, 15 sick days, and 6 additional days off for family events
• Up to 10 additional days off for public holidays
• 100% medical insurance coverage
• Sports and equipment reimbursement
• Team building events, corporate gifts, and stylish merch
• Financial and legal support
• Position retention and support for those who join the Armed Forces of Ukraine
• Participation in social initiatives supporting Ukraine

Comfortable working environment:

• Work from our Kyiv hub or remotely with a flexible schedule
• Modern equipment or depreciation of your own tools

Investment in your future:

• Collaborate with a highly-skilled team of Middle & Senior professionals, sharing practical cases and expertise in the social networking niche
• 70% of our heads and leads have grown into their roles here — so can you!
• Performance-oriented reviews and Individual Development Plans (IDPs)
• Reimbursement for professional courses and English classes
• Corporate library, book club, and knowledge-sharing events

Hiring process

• Intro call
• Technical Interview
• Reference check
• Offer

Hi there,

We’re looking for a talented Senior Node.js Developer to help build the next generation of AI-driven finance solutions.

Location: EU

About the project:

Our client provides an AI-powered platform that revolutionises corporate expense management by automating approval workflows, tracking real-time spending, and offering data-driven budgeting insights.

Designed for mid to large-sized businesses (200 to 10,000 employees), the solution ensures scalability and flexibility, enabling greater control over expenses while enhancing employee autonomy.

By replacing traditional expense reports, it streamlines financial processes, helping companies embrace digital finance through intelligent, integrated software!

Requirements:
— 7+ years of backend development experience with production systems
— Proficiency in Node.js for building scalable backend applications
— Strong experience with SQL databases (MySQL, PostgreSQL), including query optimization and performance tuning
— Familiarity with backend frameworks such as Express.js or similar
— Experience working in Agile environments
— Strong analytical and problem-solving skills for performance optimization and system efficiency
— Excellent collaboration and communication skills within cross-functional teams
— Experience with cloud services (AWS, GCP, Azure)
— Familiarity with microservices architecture and containerization (Docker, Kubernetes)
— Knowledge of CI/CD practices
— Strong experience with AI development tools and frameworks
— Upper-Intermediate English level or higher

Responsibilities:
— Design, implement, and maintain scalable, secure, and high-performance backend systems
— Build and manage RESTful APIs for seamless integration and smooth user interactions
— Optimize database queries, manage schemas, and ensure data integrity with large datasets
— Collaborate with frontend engineers, product managers, and cross-functional teams to deliver impactful features
— Contribute to system architecture design, ensuring scalability, resilience, and maintainability
— Participate in code reviews, refactor code for performance, and suggest optimizations
— Ensure backend processes follow security, compliance, and data privacy best practices
— Monitor and optimize backend performance for a smooth user experience

What we offer:
— Flexible Work Environment: Opportunity to work remotely
— Premium Medical Insurance: Comprehensive health insurance for your well-being
— 1:1 English Classes: Individual English language training to enhance communication skills
— Great Team: Supportive, collaborative, and dynamic international team
— Equipment Provided: All necessary equipment supplied for efficient job performance
— Annual Vacation: 18 days of paid vacation and 7 days of paid sick leave
— Commitment to Hiring Ukrainians: Dedicated to hiring Ukrainian talent and promoting Ukraine as a fantastic place to work
— Flexible Payment System: Allows you to withdraw funds easily with multiple options

Does this position sound like a perfect match? We’re eager to hear from you!

Node.js developer

About Seera

Seera is a premium short-form drama platform reimagining storytelling for mobile-

first audiences across the Middle East and beyond. We produce and distribute

cinematic micro-series (60–120s episodes) designed for high engagement, rapid

iteration, and cultural relevance.

We’re building a product at the intersection of streaming, gaming mechanics, and

mobile-first UX—early enough that strong engineers will have real ownership and

visible impact.

About the Role

We’re looking for a skilled Backend Engineer to develop and maintain the core

backend systems that power Seera’s mobile and web platforms. You will focus

entirely on backend development, collaborating closely with mobile and web

frontend teams to deliver high-quality APIs and services that scale with our growing

user base.

Responsibilities

• Build and maintain backend services and APIs using Node.js

• Collaborate with mobile and web teams to integrate frontend features

• Design, optimize, and maintain backend architecture for scalability and

performance

• Ensure security, reliability, and high availability of backend systems

• Write clean, maintainable code

• Participate in code reviews and contribute to engineering best practices

Required Skills

• Strong experience with JavaScript

• Solid understanding of API design and implementation (REST/GraphQL)

• Experience with relational or NoSQL databases

• Familiarity with Git or other version control systems

• Strong problem-solving skills and ability to work collaboratively with frontend

teams

Nice to Have

• Experience with streaming/media content delivery

• Cloud platform experience with AWS

• CI/CD, automated testing, and monitoring experience

• Knowledge of caching and message queue systems

Why Join Seera

• Build backend systems for a fast-growing entertainment platform

• Collaborate with talented mobile and web frontend teams

• Opportunity to influence backend architecture and technology choices

• Fast-moving environment with minimal bureaucracy

We are looking for a highly experienced Senior Backend Engineer with a strong background in designing and developing scalable backend systems

Key Responsibilities

• Design, develop, and maintain robust backend services using NestJS, following best practices in modular architecture, DI, and middleware design.
• Architect and optimize complex PostgreSQL schemas, including migrations, relationships, and handling of semi-structured data via JSONB.
• Set up and tune Elasticsearch for multilingual, full-text search with support for analyzers, stemming, and synonyms.
• Implement and maintain synchronization strategies between PostgreSQL and Elasticsearch, using queues or manual sync mechanisms.
• Build reliable, well-documented RESTful APIs; experience with GraphQL is a strong advantage.
• Ensure secure access control, rate-limiting, and robust authentication mechanisms.
• Utilize Redis for caching, rate-limiting, and background job processing (e.g., Elasticsearch sync jobs).
• Write clean, maintainable, and thoroughly tested code using Jest or similar testing frameworks.
• Collaborate with cross-functional teams, take ownership of feature delivery, and contribute to the overall architecture and tech roadmap.

Required Skills

• 5+ years of professional experience in backend development, ideally within high-scale or real-time systems.
• Production-level experience with NestJS, PostgreSQL, Elasticsearch, and Redis.
• Deep understanding of system design, data modeling, and query optimization.
• Solid grasp of event-driven architecture and asynchronous job processing.
• Comfortable working in fast-paced, product-focused environments.
• Excellent problem-solving skills and a proactive mindset.
• English: B2 level or higher – able to clearly articulate technical concepts and actively participate in discussions.

We are looking for a Middle Backend Developer to join our product team and work on a long-term, technically interesting project. You will be involved in designing, developing, and improving backend services that directly impact the product and its users. We value clean architecture, thoughtful technical decisions, and continuous growth.

Required Skills & Experience:

• 4+ years of commercial experience in backend development
• Strong knowledge of PHP and Node.js
• Hands-on experience with backend frameworks (any PHP, Node.js, or other backend frameworks are welcome)
• Experience in building and maintaining RESTful APIs
• Practical experience with MongoDB
  • schema design
  • indexing
  • query optimization
• Understanding of backend architecture principles and best practices
• Experience working with version control systems (Git)
• Ability to write clean, maintainable, and readable code

• Understanding of asynchronous programming concepts

   

Nice to Have:

• Experience with popular frameworks such as Laravel, Symfony, NestJS, Express, Fastify, or similar
• Experience with SQL databases (MySQL / PostgreSQL)
• Familiarity with Docker and containerized environments
• Basic knowledge of backend security principles (authentication, authorization, data protection)
• Experience working on a product-oriented company or long-term projects

• Experience with automated testing (unit / integration)

   

What We Offer:

• An interesting and challenging product with real users and real impact
• A strong, friendly team and healthy engineering culture
• Opportunity to grow professionally, learn new technologies, and influence technical decisions
• Stable workload and focus on quality rather than constant “firefighting”

• Competitive compensation and transparent growth path

   

What We Appreciate

• Proactive mindset and ownership of results
• Willingness to learn and improve existing solutions
• Ability to communicate ideas clearly within the team
• Interest in building scalable and reliable systems

N-iX is looking for a Senior Node.js Engineer for one of our clients.

The first Israeli SMS aggregator - connecting businesses of all sizes to the world with an API that developers love with a live, large-scale messaging platform powering tens of millions of events daily under strict SLA requirements. We provide the backbone infrastructure that enables reliable and real-time communication at scale.

Role mission
Join the core engineering team of client, a live large-scale messaging platform, and act as a production-grade backbone engineer responsible for systems processing tens of millions of events per day under strict SLA requirements.

This is a long-term, full-time role focused on stability, scalability, and reliability, rather than feature velocity at the expense of quality.

Key Responsibilities:

• Design, develop, and maintain large-scale messaging and event-driven backend platforms.
• Drive migration initiatives from monolithic to microservices architectures.
• Champion low-latency, real-time system operation (WebSockets, Socket.IO, streaming pipelines).
• Ensure reliability and observability through strong monitoring and incident handling systems.

• Collaborate and integrate deeply with the engineering team to guarantee long-term platform evolution and quality.

   

Mandatory Experience:

• Backend Engineering: 8+ years of hands-on backend experience.
• Expertise: Node.js, TypeScript at a production and expert level.
• Architecture: Microservices design and migration from monoliths.
• API Design: REST, OpenAPI / Swagger.
• High-Load Messaging: Proven experience with high-throughput systems; message queues/event-driven (Kafka or RabbitMQ mandatory).
• Resilience: Handling backpressure, retries, DLQs, idempotency, rate limiting, failure isolation.
• Realtime Systems: Experience with realtime systems (WebSockets, Socket.IO, WebRTC, streaming pipelines), processing telemetry or delivery reports.
• Databases & Caching: PostgreSQL/MySQL (schema design, performance tuning), Redis for caching/buffering.
• Cloud & Deployment: Strong experience with GCP, Docker, CI/CD pipelines.
• Observability: Prometheus, Grafana, Datadog, Sentry, or Kibana.

• Production Readiness: Experience in incident response and on-call rotations.

   

Strong Advantages (Nice to Have):

• Payments, fintech, or banking system experience.
• Security and authentication (JWT, OAuth2).
• Infrastructure as Code (Terraform).
• Kafka at scale.
• Technical leadership, system ownership roles.

• Experience with unstable third-party APIs.

   

Soft Skills:

• Strong ownership and system-level thinking.
• Calm under pressure, Excellent English communication.
• Team-first orientation (not freelance-focused).

• Proactive and independent within a collaborative environment.

   

We offer*:

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

*not applicable for freelancers

We are building a high-performance, real-time slot gaming platform and are looking for a Senior Backend Developer who will take ownership of our entire backend direction.

🧩 What you’ll do

• Own and drive the backend direction of the company as one of the key technical leaders;
• Design and implement new game mechanics on top of our existing PGS, extend its capabilities, and contribute to core gameplay engine development;
• Architect scalable, secure, and high-performance backend services using Node.js and TypeScript;
• Work closely with Game Logic, Frontend, and DevOps teams to ensure seamless integrations, real-time performance, and platform-wide consistency;
• Define backend engineering standards and enforce best practices across code quality, architecture, and performance;
• Design and maintain backend infrastructure: schemas, caching, messaging flows, microservices, gateways;
• Participate in roadmap planning, technical decision-making, and architectural discussions as the platform evolves;
• Support a rapidly growing product and engineering environment — we are scaling fast, and you will play a major role in that growth.

🧠 What you bring

• 5+ years of backend development experience, including ownership of complex systems or features;
• Strong expertise with Node.js + TypeScript and modern frameworks (Fastify, Nest.js);
• Advanced knowledge of SQL and NoSQL databases: PostgreSQL, MongoDB, Redis;
• Solid experience with message brokers (RabbitMQ or Kafka) and queue-based, event-driven design patterns;
• Deep understanding of distributed systems, microservices, and real-time communication (WebSocket, Socket.io);
• Experience building high-performance APIs, async flows, caching strategies, and scalable architectures;

• Confident with CI/CD, Git, automated testing (Jest), and monitoring/observability tools (Grafana, Loki, Tempo).

   

💎 Nice to have

• Knowledge of PHP/Laravel or experience with other backend ecosystems;
• Familiarity with AWS, Docker, Kubernetes, containerized deployments;
• Experience with RNG, platform integrations, or the iGaming ecosystem.
   

🎁 Benefits

— 21 vacation days + 5 extra day-offs annually;
— 12 paid sick days;
— Fully remote format — work from anywhere you feel productive;
— Flexible schedule: start your day anytime between 08:00–12:00 CET;
— Fixed budget for health insurance and gym/fitness;
— We provide all required work equipment;
— Zero bureaucracy and direct communication with founders and C-level;
— Minimal meetings, async-friendly workflow;
— Startup energy: fast motion, creativity, and tight-knit communication;
— Business trips and team meetups several times per year;
— Multiple salary payout options (flexible formats);
— …And many more perks unlocked after we hit break-even.

Hi there,

We’re looking for a talented Senior Node.js Developer to help build the next generation of AI-driven finance solutions.

Location: Europe only.

About the project:

Our client provides an AI-powered platform that revolutionises corporate expense management by automating approval workflows, tracking real-time spending, and offering data-driven budgeting insights. Designed for mid to large-sized businesses (200 to 10,000 employees), the solution ensures scalability and flexibility, enabling greater control over expenses while enhancing employee autonomy. By replacing traditional expense reports, it streamlines financial processes, helping companies embrace digital finance through intelligent, integrated software!

Requirements:
— 7+ years of backend development experience with production systems
— Proficiency in Node.js for building scalable backend applications
— Strong experience with SQL databases (MySQL, PostgreSQL), including query optimization and performance tuning
— Familiarity with backend frameworks such as Express.js or similar
— Experience working in Agile environments
— Strong analytical and problem-solving skills for performance optimization and system efficiency
— Excellent collaboration and communication skills within cross-functional teams
— Experience with cloud services (AWS, GCP, Azure)
— Familiarity with microservices architecture and containerization (Docker, Kubernetes)
— Knowledge of CI/CD practices
— Strong experience with AI development tools and frameworks
— Upper-Intermediate English level or higher

Responsibilities:
— Design, implement, and maintain scalable, secure, and high-performance backend systems
— Build and manage RESTful APIs for seamless integration and smooth user interactions
— Optimize database queries, manage schemas, and ensure data integrity with large datasets
— Collaborate with frontend engineers, product managers, and cross-functional teams to deliver impactful features
— Contribute to system architecture design, ensuring scalability, resilience, and maintainability
— Participate in code reviews, refactor code for performance, and suggest optimizations
— Ensure backend processes follow security, compliance, and data privacy best practices
— Monitor and optimize backend performance for a smooth user experience

What we offer:
— Flexible Work Environment: Opportunity to work remotely
— Premium Medical Insurance: Comprehensive health insurance for your well-being
— 1:1 English Classes: Individual English language training to enhance communication skills
— Great Team: Supportive, collaborative, and dynamic international team
— Equipment Provided: All necessary equipment supplied for efficient job performance
— Annual Vacation: 18 days of paid vacation and 7 days of paid sick leave
— Commitment to Hiring Ukrainians: Dedicated to hiring Ukrainian talent and promoting Ukraine as a fantastic place to work
— Flexible Payment System: Allows you to withdraw funds easily with multiple options

Does this position sound like a perfect match? We’re eager to hear from you!

🚀 Join RiskSeal as a Node.js Engineer!

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. Experience with microservices architecture, strong proficiency with raw SQL and you must be comfortable using raw Node.js — primarily with Express and Fastify.

This is a fully remote role, so we expect video to be enabled during all our work calls (daily syncs, weekly meetings and other team sessions).

Please make sure you have an active LinkedIn profile available to share as part of the hiring process.

📌 We’re looking for candidates with at least 1 year of recent, backend-oriented experience.
 

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 raw Node.js.
• Hands-on experience with message brokers (Kafka).
• Strong experience with raw SQL and other relational databases.
• Experience integrating and implementing with different APIs and protocols (e.g., REST, WebSockets).
• Strong skills in analyzing data from various sources to identify patterns, anomalies, and insights related to fraud and risk.
• Understanding of cybersecurity principles and practices to ensure the security of data and tools developed is beneficial.
• 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.
• Experience with Python and/or PHP will be a plus.
   

📩 Ready to Join?
Send us your resume, we’d love to chat and see if it’s a match! 

Interview process (2 steps):
Step 1 — Recruiter screening
Step 2 — Technical interview

We’re expanding our engineering team and looking for a strong Senior or Lead Node.js Engineer who can own complex product areas, influence technical direction, and play a key role in delivering high-performance products across insurance and event management.
 

What You’ll Be Doing:

• Drive end-to-end feature development across the stack — from technical design to production delivery.
• Design, develop, and maintain backend services using Node.js, Express, and databases (PostgreSQL, MongoDB).
• Build high-quality, responsive UI components in React and ensure smooth interaction between frontend and backend.
• Participate in architectural decisions, contribute to system design, and improve overall platform scalability, performance, and reliability.
• Lead complex tasks, provide technical guidance to the team, and help shape coding standards.

• Take ownership of integrations with external services and ensure stable, well-documented APIs.

   

Soft skills and communication style are essential for this role. The client values a pragmatic, direct, and time-efficient approach, with clear, practical, task-focused communication.

• Keep communication clear, structured way, focused on real tasks and deliverables.
• Communicate with facts and concrete examples.

What We Are Looking for:

• 6+ years of professional experience with Node.js and React.
• Availability to work until 12:00–1:00 a.m. Kyiv time (alignment with US clients).
• Strong knowledge of JavaScript/TypeScript and modern web development practices.
• Experience designing and developing REST APIs, backend services, and database integrations (PostgreSQL, MongoDB).
• Hands-on experience with performance optimization, debugging, security best practices, and scalable architecture.
• Solid understanding of Git and collaborative version-control workflows.
• Ability to lead technical decisions and drive engineering best practices.

• Strong ownership mindset — from requirements clarification to production delivery.

   

Our Hiring Process:

• Intro Interview — appr. 30 min;
• Technical Interview — 60 min;
• Final Interview — 60 min;
• Interview with CEO — up to 60 min.

We’re expanding our engineering team and looking for a Node.js Engineer to join the development of high-performance products in the fintech or event management space, with opportunities to grow technically and take on increasing responsibility.
 

What You’ll Be Doing:

• Develop and maintain backend APIs using Node.js, Express, and database systems (e.g., PostgreSQL, MongoDB).
• Implement interactive and responsive UI components in React.
• Collaborate with the design and QA teams.
• Optimize application performance and security.
• Write clean, maintainable, and testable code.

What We Are Looking for:

• 3+ years of experience with Node.js and React.
• Strong understanding of JavaScript/TypeScript.
• Experience with REST APIs and database integration.
• Familiarity with Git and version control workflows.
• Good understanding of modern web development practices.
• English level: Upper-Intermediate and higher.
• Availability to work until 12:00–1:00 a.m. Kyiv time (alignment with US clients).
   

Our Hiring Process:

• Intro Interview — appr. 30 min;
• Technical Interview — 60 min;
• Final Interview — 60 min;
• Project Fit Interview — up to 60 min (optional).

As the StellarsTech team continues to grow, we’re excited to open a strong junior full-stack opportunity for engineers who want to grow in a fast-paced, international environment.
This role is a great fit if you already have hands-on experience with modern web technologies and are ready to take more ownership while learning from a strong engineering team.
 

What You’ll Be Doing:

• Participate in the development and maintenance of backend APIs using Node.js, Express, and relational or NoSQL databases (PostgreSQL, MongoDB).
• Build and improve React components with a focus on usability and responsiveness.
• Work closely with senior engineers, designers, and QA to deliver high-quality features.
• Fix bugs, refactor existing code, and gradually take ownership of small to mid-size features.
• Follow best practices for code quality, performance, and security.
• Write clean, readable, and maintainable code with guidance from the team.
   

What We Are Looking for:

• 1.5–2+ years of commercial experience with Node.js and React.
• Good knowledge of JavaScript and basic understanding of TypeScript.
• Experience working with REST APIs and databases.
• Basic understanding of backend architecture and frontend–backend interaction.
• Experience with Git and common development workflows.
• Willingness to learn, ask questions, and grow professionally.
• English level: Intermediate+ / Upper-Intermediate.
• Availability to work until 12:00–1:00 a.m. Kyiv time (in alignment with US clients’ schedules).
   

Nice to Have:

• Experience with testing (unit or integration).
• Familiarity with Docker or cloud platforms.
• Experience working in a team environment following Agile/Scrum practices.
   

Our Hiring Process:

• Intro Interview — ~30 min.
• Technical Interview — 60 min.
• Final Interview — 60 min.
• Project Fit Interview — up to 60 min (optional).