Jobs Node.js

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

Who we are?
We’re at the core of fintech innovation, building a decentralized financial ecosystem that merges traditional banking with blockchain and AI. Our mission is to make wealth accessible to all through products like hybrid card-crypto wallets, used by 70,000+ paying clients across 40+ countries. We’re a worldwide team working remotely from over 20 countries, operating from Dubai, seeking a Backend Engineer to own a tech vertical.

Role Overview

As Backend Engineer, you will own the development, support and optimization of the back-end services with the wider product ecosystem. 

You’ll maintain our production back-end services, ensuring all the issues are being monitored and fixed as well as architect new extended functionality and improve existing services.

Key Responsibilities

Architecture & Development

• Collaborate with backend team on event-driven architectures (Kafka, NestJS microservices).
• Build and maintain APIs using Java and Node.js
• Continuous PostgreSQL database optimization 

Security & Reliability

• Implement financial transaction flows, referral bonus system, and validation logic.
• Conduct and supervise the QA process.
• Establish monitoring, alerting, and incident response standards

Culture & Collaboration

• Review architecture proposals and ensure alignment with tokenomics and business logic.
• Work closely with the CTO and Product Owner and Contribute to building engineering processes in an early-stage environment.
• Collaborate with Delivery Manager for rapid product delivery.

Additional Requirements

• 7+ years of backend software engineering experience, focusing on scalable systems. 
• Hand-on experience to modernize legacy systems and integrate new solutions
• Fluent English (written/spoken)

What else is important

• Location: Dubai-based or remote in EU timezone. Covered business trips every 2-3 months are possible.
• Close collaboration with three tech leads, CTO, and a delivery manager in a star team.
• Culture: Zero tolerance for conflicts, focus on business and results.

What we offer:

• Flexible working schedule, remote work.
• Competitive salary.
• Paid vacations, sick leaves.
• Comprehensive insurance (dental, vision, top Dubai hospitals). 
• Family relocation support: visas, tickets, document assistance. 
• Unlimited vacation (with reasonable use). 
• Access to top DeFi conferences, including our own events.
• 100% friendly/family team.

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 the product: Global video communication app, where you can meet new friends and communicate with people all over the world. You can co someone very smart, funny, pleasant, just a person of your type. But it’s always up to you whether to join chat or keep searching for another interesting person. We are proud of how many people we connect daily!

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
• Experience with relational and non-relational databases (MongoDB, Postgres and Redis)
• Experience with SOA/Microservices (communication, development process)
• Experience with patterns (DDD, event-driven, SOLID, CQRS)
• Experience working with WebSockets (ws, socket.io)
• Experience working with messaging (BullMQ, RabbitMQ, Kafka)
• Experience with cloud providers (AWS, GCP, etc)
• Experience 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
• Final Interview
• Reference check
• Offer

We're looking for a motivated JavaScript developer at the junior or trainee level to join a team that builds production-grade web scrapers for enterprise clients. Your work will run on enterprise-level web data infrastructure used by some of the world's most recognizable brands - from Fortune 500 retailers like Nike to global technology companies like Philips - powering their market research, price intelligence, and competitive data pipelines.

This is a hands-on engineering role. You won't be writing toy examples - from early on you'll be building real scrapers that extract structured data at scale.

Responsibilities

- Analyze target websites using Chrome DevTools to understand DOM structure and network requests

- Write JavaScript scrapers using Cheerio and related libraries

- Craft precise CSS selectors and XPath expressions to reliably target data elements

- Use Postman to inspect APIs and reverse-engineer data endpoints where applicable

- Handle pagination, dynamic content, and common anti-scraping patterns

- Deliver clean, structured output data (JSON/CSV) per client specifications

- Maintain and update existing scrapers as target sites change

Tech stack

JavaScript, Cheerio, CSS Selectors, XPath, Chrome DevTools, Postman, Git

Requirements

- 1 year of JavaScript experience in any context (commercial, freelance, or project-based), OR currently enrolled in / recently graduated from a Software Engineering, Computer Science, or related program

- English B2 or higher - you must be able to read technical documentation and communicate with the team in English

- Understanding of HTML/DOM structure and HTTP basics

- Ability to learn independently and figure things out from documentation

Nice to have

- Any personal or academic projects involving scraping, parsing, or browser automation

- Familiarity with Node.js ecosystem

- Basic knowledge of how proxies or headless browsers work

What we offer

- Work on real client projects from day one - no synthetic tasks

- Mentorship and code review from experienced engineers on the team

- Remote-first, fully async-friendly - work from anywhere

Own your future:

Our culture isn't something people join, it's something they build and shape. We believe that every person deserves to be heard and empowered. If you're on the fence about whether you're a fit, we say go for it. Let’s build something great together.
‍

Must Haves:

• A full-stack mindset, ready to work across the back-end, front-end, infrastructure and firmware.
• Excellent troubleshooting skills with experience in building microservices on AWS using Lambda, Amazon S3, Amazon Cognito, Amazon API Gateway, DynamoDB, AWS IoT Core, Kinesis, SNS, SQS.
• Strong experience with Node.js / JavaScript / TypeScript.
• Previous exposure to large-scale systems design, experience with the serverless approaches using AWS Lambda.

• Experience with Golang.

   

Nice to have:

• Understanding of specifics for running Go under heavy load.
• Understanding IoT solutions and having built or been part of a team that delivered an IoT solution is a huge plus.

• Experience with Kafka and familiarity with event-driven architectures.

   

Key Responsibilities:‍

• Provide support for the software architecture, design, and implementation of software components related to IoT-connected products.
• Optimize data storage by balancing performance, cost, and storage tradeoffs through various database technologies.
• Drive engineering from concept to finished product.
• Design, and build usable, robust, and reliable services.
• Contribute to architectural decisions, infrastructure setup, and production operation.

‍

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.

Our Team

VistaCreate, part of the Vistaprint group is an online graphic design tool with thousands of free templates and AI-powered features to bring ideas to life. We’re looking for a Senior Backend Engineer to join the VistaCreate team and help us build scalable, reliable, and high-performance backend services that power millions of users worldwide. You will play a key role in designing architecture, improving system performance, and driving technical decisions within the backend domain.

What You Will Do

• Design, develop, and maintain scalable backend services
• Build and maintain RESTful APIs
• Work with MongoDB and optimize database performance
• Design and improve microservice architecture
• Ensure high availability, performance, and security of backend systems
• Participate in code reviews and architectural discussions
• Improve CI/CD pipelines and containerized environments
• Collaborate closely with frontend, product, and DevOps teams

Your Qualifications

At VistaPrint, we are striving to hire individuals that add new ideas and perspectives to our teams and enhance our culture. No matter your background or work experience, we strongly encourage you to apply—even if you feel that you don’t meet the exact requirements or have the same qualifications. You might be a great candidate for this or other opportunities. 

• 5+ years of backend development experience
• Strong experience with Node.js and TypeScript
• Strong understanding of REST API design principles
• Experience with MongoDB (data modeling, performance optimization)
• Understanding of microservices architecture
• Experience with message brokers (RabbitMQ)
• Experience with monitoring/logging systems (Grafana, Sentry)
• Experience with high-load systems
• Intermediate+ English (written and spoken)

Nice to Have

• Experience with Go
• Experience with Docker and containerized environments
• Experience with cloud platforms (AWS)
• Experience working in product companies
• Knowledge of security best practices

Why You'll Love Working Here

There is a lot to love about working at VistaPrint. We are an award winning Remote-First company. We’re an inclusive community. We’re growing (which means you can too). And to help orient us all in the same direction, we have our Vista Behaviors which exemplify the behavioral attributes that make us a culturally strong and high-performing team. 

About Us

VistaPrint is the design and marketing partner to millions of small businesses around the world. For over 20 years we’ve been inspired by small businesses, and we work incessantly to deliver solutions to their evolving needs. Together, VistaCreate, 99designs by Vista and VistaPrint represent a full-service design, digital and print solution, elevating small businesses’ presence in physical and digital spaces and powering them to achieve success. VistaPrint is focused on making great marketing and design accessible to every small business owner, allowing them to create a cohesive brand image for use in-store, online and on-the-go.

Commitment to Diversity, Equity, & Inclusion

VistaPrint exists to help our customers live their dreams. Each dream is unique – and the VistaPrint team needs to be as well. We believe in the unique contributions of everyone within a diverse global organization. We are collaborative, inclusive, and innovative. We strive to role model and live an inclusive culture of fairness, respect and belonging for all. And we work together to empower each other, creating a space in which each of us can spark our next great idea. 

Equal Opportunity Employer

VistaPrint, a Cimpress company, is an Equal Employment Opportunity Employer. All qualified candidates will receive consideration for employment without regard to race, color, sex, national or ethnic origin, nationality, age, religion, citizenship, disability, medical condition, sexual orientation, gender identity, gender presentation, legal or preferred name, marital status, pregnancy, family structure, veteran status or any other basis protected by human rights laws or regulations. This list is not exhaustive and, in fact, in many cases, we strive to do more than the law requires.

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 hiring a Senior Full Stack Developer for an Israeli deep tech company building a cloud-native platform for monitoring critical infrastructure at scale. The product helps utilities, energy companies, and infrastructure operators detect threats, anomalies, and operational events in real time across thousands of kilometers of pipelines, power lines, railways, and perimeter assets.

The platform processes continuous streams of acoustic sensor data from distributed fiber optic networks, runs machine learning classification on top of it, and delivers actionable alerts through a smart command and control interface. It integrates with SCADA systems, Digital Twins, and other enterprise control environments. The frontend is the primary window into all of this - maps, dashboards, real-time alerts, and operational workflows that field teams and enterprise clients rely on daily.

The system is cloud-native, built around Next.js and NestJS in TypeScript, running on AWS with Kubernetes and Docker. The product is live, used by real enterprise customers across multiple industries and geographies, and continues to grow in scope and scale.

In this role you will work across the full stack, owning features end-to-end from architecture through production. You will collaborate closely with product, R&D, and domain experts to build interfaces and services that make complex sensor data understandable and actionable.

Responsibilities

- Design and implement scalable, high-performance web applications end-to-end

- Architect backend services and APIs using NestJS

- Build modern, responsive frontend applications with Next.js

- Leverage modern AI tools and workflows to increase development velocity and code quality

- Be part of complex technical discussions with the ability to contribute a major part to the discussion and decisions

- Own features from concept to production

- Optimize performance, reliability, and security across the stack

- Mentor developers and promote engineering best practices

Tech Stack

- Full stack: Next.js, NestJS (TypeScript)

- System design: Chakra UI

- Infrastructure: Kubernetes, Docker, CI/CD pipelines

- Database: SQL / NoSQL (depending on service)

- Cloud: AWS (Lambda, ECS/EKS, S3, RDS, etc.)

Requirements

- 5+ years of experience as a Full Stack Developer

- Proven experience with relevant technologies and frameworks

- Strong understanding of system design (experience with Chakra UI is an advantage), scalability, and cloud architecture

- Solid experience working with AWS in production environments

- Fluent in English and strong communication skills

- Experience working in startup or fast-paced environments

- Strong problem-solving skills and ownership mindset

- Hands-on experience with Docker and Kubernetes

AI & Modern Engineering Expectations

Candidates must be proficient and up to date with the latest AI advancements, actively using AI-powered development tools (like Claude Code, Code Rabbit, or similar) to accelerate development, enhance code quality, and innovate product features where AI adds user value.

Nice to Have

- Experience designing and developing microservices architecture

- Experience with Python and Dash

- Background in performance optimization and distributed systems

This is a long-term opportunity to work on a technically serious product with real enterprise customers, meaningful infrastructure scale, and strong engineering culture in one of Israel's most awarded deep tech companies.

On behalf with our customer we are seeking for Full Stack 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

● 7+ years of coding experience in Backend (NodeJS is preferred) and Frontend (One of the popular frameworks; React, Vue, Angular)
● 3+ 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

Bonus Skills

● Experience working with offshore contactors
● Experience with web-based SaaS systems
● Experience with Big Data

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

GR8 Tech builds B2B iGaming platforms for operators who play to lead.

We deliver full-cycle, high-impact tech designed to scale — from seamless integrations and expert consulting to long-term operational support. Our platform powers millions of active players and drives real business growth. Call it what it is: the iGaming Platform for Champions.

With 1000+ GR8 people across locations and time zones, we don’t just ship technology — we help operators build success stories across brands, markets, and geos.
 

Our ambition drives us. Our people make it real.

If you’re a challenger in spirit and a champion in action — join us.
 

Why this role exists:

This role exists to build, evolve, and stabilize web platforms where performance, scalability, and reliability directly impact business outcomes.
You’ll help us ship and scale Node.js–based systems by owning backend and frontend components end to end — from design decisions to production delivery.
 

What you’ll drive:

Architecture & technical decisions

• Design and evolve backend and frontend architecture using Node.js and JavaScript.
• Apply architectural patterns (microservices, event-driven design) based on real constraints.
• Design systems with failure in mind, using resilience patterns like circuit breakers and rate limiting.

Delivery & execution

• Build, ship, and maintain backend services and web interfaces in production.
• Deliver new features end to end — from requirements to release.
• Optimize applications for performance, scalability, and reliability.
• Ensure high code quality through reviews, testing, and clean architecture.

Quality, testing & reliability

• Write and maintain unit, integration, and end-to-end tests.
• Improve test coverage and reliability of existing systems.
• Identify performance bottlenecks and drive optimization initiatives.
• Ensure secure coding practices and basic application security.

Collaboration & product delivery

• Partner with product managers, designers, and engineers to deliver business outcomes.
• Translate requirements into technical solutions with clear trade-offs.
• Contribute to planning, estimation, and iterative delivery in Agile environments.
• Share technical context and documentation with the team.

Team contribution & growth

• Mentor junior engineers and support technical growth within the team.
• Participate in technical discussions and continuous improvement initiatives.
• Stay current with modern JavaScript, Node.js, and web development practices.
   

What makes you a GR8 fit:
 

Must-have

• 3+ years of commercial experience with Node.js and JavaScript.
• Strong knowledge of modern JavaScript (ES12+), async programming, and Node.js internals.
• Experience building RESTful APIs with NestJS, Express, Fastify, or similar frameworks.
• Solid understanding of web fundamentals: HTTP, browser rendering, SPA architecture.
• Experience with SQL databases, basic data modeling, and queries.
• Hands-on experience with testing (unit/integration) and CI/CD pipelines.
• Comfortable working independently and owning features end to end.
• Intermediate or higher level of English, fluent in Ukrainian or Russian. 
   

Nice-to-have

• Experience with Docker and basic Kubernetes concepts.
• Familiarity with event-driven systems and message-based architectures.
• Exposure to cloud platforms (AWS preferred).
• Experience with Webpack, module federation, and bundle optimization.
• Monitoring and performance tooling (Prometheus, Grafana, ELK).
   

Why you’ll love working here: 
 

Benefits Cafeteria — annual budget you allocate to:

Sports • Medical • Mental health • Home office • Languages.

Work-life & support

• Paid maternity/paternity leave + monthly childcare allowance.
• 20+ vacation days, unlimited sick leave, emergency time off.
• Remote-first + tech support + coworking compensation.
• Team events (online/offline/offsite).
• Learning culture with internal courses + growth programs.
   

Our culture & core values:

GR8 Tech culture is how we win — through trust, ownership, and a growth mindset. We move fast, stay curious, and keep it real, with open feedback, room to experiment, and a team that’s got your back.

FUELLED BY TRUST: we’re open, honest, and have each other’s backs.

OWN YOUR GAME: we take initiative and own what we do.

ACCELER8: we move fast, focus smart, and keep it simple.

CHALLENGE ACCEPTED: we grow through challenges and stay curious.

BULLETPROOF: we’re resilient, ready, and always have a plan.

Project Description
The Carbon Capture Platform supports verification and management of CO₂ sequestration data from Carbon Capture and Storage operations. The system processes monitoring data, generates verifiable records, and enables the creation of digital tokens representing stored CO₂.

At the initial stage, the team will analyze the existing platform, including architecture review, codebase evaluation, and identification of technical issues, gaps, and risks.
Based on this assessment, the team will resolve identified issues, improve system stability and scalability, and implement enhancements. The scope also includes development of new features and onboarding of new customers, including integration with external systems such as SCADA platforms.

The overall goal is to ensure reliable platform operation, support its further development, and enable efficient integration of new users and data sources.

Responsibilities

• Analyze backend architecture and codebase to identify technical debt, performance issues, and design limitations
• Support evaluation of current data model, APIs, and data processing logic
• Implement improvements to backend services to address architectural and performance issues
• Develop and maintain backend APIs for data ingestion, system operations, and integrations
• Implement new features and enhancements based on customer requirements
• Support integration with external systems such as SCADA and industrial monitoring platforms
• Troubleshoot and resolve production issues affecting backend services
• Collaborate with DevOps and QA teams to ensure system reliability and performance

Mandatory Skills

• 5+ years of backend development experience
• Strong experience with Node.js and modern backend frameworks
• Hands-on experience with AWS services (Lambda, RDS, S3)
• Practical experience with Python for backend logic or data processing
• Experience designing microservices and scalable REST APIs for high-throughput data ingestion
• Experience with relational databases such as PostgreSQL
• Basic understanding of blockchain integrations

Nice-to-Have Skills

• Familiarity with SCADA platforms or industrial monitoring systems
• Basic understanding of blockchain or decentralized data protocols
• Experience with time-series databases or telemetry data systems
• Experience collaborating with DevOps on CI/CD and system reliability improvements

Languages

• English: B2 (Upper Intermediate)**

We're hiring a Senior Backend Engineer to join a US-based team working on a hosting platform that serves hundreds of thousands of users. The product includes a website builder with AI capabilities, a customer management panel, and internal support tools.

The role
You'll spend most of your time writing backend services in Node.js / TypeScript. Some tasks involve frontend work in React / TypeScript  roughly an 80/20 split. 

A separate DevOps team manages infrastructure; you may occasionally prototype something in a container, but production setup is on them.

AI is part of the product but only as integration. You'll call APIs from providers like OpenAI or Claude. No ML knowledge needed.

You'll be responsible for

• Designing and building backend services end to end
• Contributing to the frontend when a feature requires it
• Deploying your work and supporting it in production
• Collaborating with Product, Platform, and SRE teams
• Proposing technical improvements — there's an Architect, but independent thinking is expected

Stack

Node.js, TypeScript, React, Redis, MySQL, PostgreSQL, Elasticsearch, RabbitMQ / Kafka, monitoring & observability tools

What matters

• Production experience with Node.js / TypeScript (Express, NestJS, or similar)
• Working knowledge of React / TypeScript
• Strong database and caching skills
• Ability to debug across multiple services in production
• Ownership mindset — you take a task from design to release
• English — daily async communication + one weekly call with the US team

Bonus

• Microservice architecture & API design
• Docker / Kubernetes basics
• Performance profiling
• Linux / networking fundamentals
• Clean architecture, automated testing, SOLID

Conditions

• Fully remote, flexible schedule
• 20 days vacation / year
• Salary reviews every 6 months
• FOP with accounting support
• Real influence on a product at scale

Perion is looking for a Backend Developer to join our team and help build and maintain scalable data solutions that power our digital advertising platform. In this role, you will design and develop backend data APIs and work with Big Data technologies to process and analyze massive volumes of data. You will collaborate with data engineers, data scientists, and product teams to deliver reliable, high-performance solutions that support data-driven products, business operations, and decision-making across the company’s ecosystem.

Responsibilities:

• Design, build, and deploy backend data APIs from research and architecture through development, testing, and production deployment.
• Develop scalable and reliable data-driven solutions to support business and product needs.
• Collaborate closely with data engineers, product managers, architects, and other R&D teams.
• Monitor and maintain production systems to ensure high stability, scalability, and performance.
• Work closely with data scientists to support data-driven features and analytical solutions.
• Continuously improve system performance, reliability, and development processes.

Requirements:

• At least 2 years of hands-on experience with Node.js and Python 3.
• Strong experience writing advanced SQL queries.
• Strong analytical and problem-solving skills with attention to detail.
• Fluent verbal and written English.

Nice to Have:

• Experience with Kubernetes (K8s).
• Familiarity with the JVM ecosystem.
• Experience with Apache Spark or other Big Data frameworks.
• Experience with Apache Airflow.
• Experience with AWS services such as S3, Glue, and Athena.
• Solid knowledge of Linux operating systems.
• Experience with ClickHouse.
• Familiarity with the AdTech industry and Real-Time Bidding (RTB).
• Experience with Functional Programming, Unit Testing/TDD, and Continuous Deployment practices.

What We Offer:

• Opportunity to work with large-scale data systems processing billions of events daily.
• A collaborative environment with top engineers, data scientists, and product teams.
• The chance to build innovative data infrastructure and APIs at scale.
• Professional growth in a global technology company.
• Competitive compensation and benefits package.

Our client is a travel tech startup that helps users automatically save money on flights and hotel bookings. The platform monitors booked reservations and, if the price drops, rebooks or secures a refund so users get the savings without any manual effort. The product integrates with users’ email to track bookings and works with major airlines and hotels worldwide. The company operates on a performance-based model, taking only a percentage of the savings it generates.

Requirements

Must-have skills

• Node.js — 8-10+ years of commercial experience
• Express.js — building REST APIs, middleware, routing
• MongoDB — Mongoose ODM, aggregations, indexing, query optimization
• Redis — caching, pub/sub, queues
• Testing — writing unit and integration tests (Mocha, Chai, Supertest or similar)
• Git — branching, code review, merge requests
• REST API — design and third-party integrations

Nice-to-have skills

• TypeScript — typing, migrating JS projects to TS
• GCP (Google Cloud Platform) — Cloud Run, KMS, Cloud Storage
• OpenSearch/Elasticsearch — full-text search, indexing
• REDIS — cache, queues
• Socket.io/WebSockets — real-time communication
• Gmail API / Google APIs — OAuth 2.0, email processing
• Stripe — payment integration, webhooks
• Twilio — SMS notifications
• Cheerio — HTML parsing
• Handlebars — email templating

Would be a plus

• Knowledge of queue patterns and background job processing
• Experience with Passport.js (JWT, OAuth)
• Understanding of web application security principles (OWASP)

Responsibilities

• Develop and maintain backend services on Node.js
• Write automated tests for new and existing code
• Integrate with third-party APIs (payment systems, email services, SMS)
• Optimize performance and scalability
• Work with MongoDB database, Redis storage and OpenSearch engine
• Conduct code reviews and participate in technical discussions
• Work with existing codebase, refactoring

Tech Stack

• Runtime: Node.js 22
• Framework: Express.js
• Database: MongoDB (Mongoose)
• Search: OpenSearch
• Cache: Redis
• Real-time: Socket.io
• Cloud: GCP (Cloud Run)
• Auth: Passport.js (JWT, Google OAuth 2.0)
• Payments: Stripe
• Email: Gmail API, Resend
• SMS: Twilio
• Testing: Mocha, Chai, Supertest, Sinon
• Validation: Joi, Zod
• Logging: Winston

Our Customer:

A global technology company developing real-time video augmentation and rendering infrastructure for broadcast and streaming environments.

Your tasks:

• Develop and maintain the backend pipeline to monitor, synchronize, and manipulate video streams such as SRT & HLS and MySQL resources on the cloud;
• Integrate and manage modules written both in C++ and Node.js;
• Implement a complex metadata system over AWS, including S3 security access and acceleration;
• Design and deploy backend architecture (NodeJs) to manage data allocation and pipeline control;
• Create and maintain a dashboard to monitor pipeline status and performance.

Required Experience and Skills:

• Over 8 years of experience with Node.js;
• Experience with AWS, including S3, RDS, and CloudFront;
• Experience in real-time video processing;
• Deep understanding of rendering synchronization techniques for multimedia content in a web browser environment;
• Hands-on experience with WebGL;
• Familiarity with DRM video streams (SRT, HLS) and Image Processing in the browser;
• Excellent problem-solving skills and attention to detail;
• Ability to work independently and in a collaborative team environment;
• Strong communication skills;
• English – Upper-Intermediate.

Would be a plus:

• Experience with database management, particularly MySQL;
• Experience with C++ realtime programming;
• Knowledge of modern DevOps practices and tools;
• Previous experience with sports broadcasting and AR technology.