Jobs Node.js

Build tools that redefine how business works. We are a fresh and ambitious AI studio creating meaningful, in-house products that combine human empathy with cutting-edge technology. We are expanding our footprint into the B2B AI SaaS sector, developing intelligent platforms designed to enhance productivity and automate complex business processes.

Role Description

We are looking for a versatile and experienced Next.js Developer to join our passionate, fast-moving team. If you are excited by the challenge of transforming complex business needs into elegant, high-performance, and scalable web applications, we want to hear from you.

What you'll do:

• Develop and maintain high-performance web applications using Next.js (App Router).
• Design sophisticated user interfaces (Dashboards, Data Visualization) with a focus on UX, performance, and accessibility.
• Integrate AI-driven features (chatbots, content generation, data insights) via RESTful and GraphQL APIs.
• Optimize application performance using SSR, ISR, and Server Components to ensure a seamless user experience.
• Use modern state management and data-fetching tools like Zustand and TanStack Query.
• Leverage AI coding assistants (Cursor, GitHub Copilot) to streamline development cycles and increase productivity.
• Collaborate closely with designers and backend developers to build cohesive B2B solutions.

Qualifications:

• 3+ years of professional experience with React and Next.js.
• Strong knowledge of TypeScript and modern JavaScript (ES6+).
• Proven experience in building scalable SaaS architectures and implementing server-side rendering.
• Proficiency with modern CSS frameworks (Tailwind CSS) and responsive UI components.
• Comfortable working with REST APIs, modern development tools (Git, npm/yarn), and CI/CD pipelines.
• Active interest in AI-assisted development and experience with AI coding tools.
• Strong problem-solving skills and the ability to work effectively in a remote-first environment.

What we offer:

• Full-time remote position with a flexible schedule.
• Salary from $2500 to $3500 depending on the results of the interview.
• Work on meaningful B2B AI-powered products that solve real-world business challenges.
• A culture of wellness, clarity, and purpose—we move fast, but with intention.
• A small, values-driven team where your contributions have a lasting impact.

Backend Engineer (Location-Based Mobile Game / AR)

About the Project
 

We are building a location-based mobile game where users purchase keys to hunt and open real-world chests using their phone camera.

Each chest can be opened only once globally, which makes backend logic, geo-queries, and data integrity critical.

This is an early-stage MVP with clear scope, fast decisions, and direct access to the product owner.

Responsibilities

• Design and implement backend architecture for the MVP
• Build REST APIs for:
   
  • user profiles & authentication
  • keys inventory & balance
  • geo-based chest discovery
  • chest opening (atomic, server-authoritative)
  • town-based statistics & leaderboard
     
• Design PostgreSQL schema with geospatial queries (PostGIS)
• Implement anti-cheat logic:
   
  • distance validation
  • speed / teleport detection
  • race-condition protection (two users opening same chest)
     
• Integrate Apple / Google sign-in
• Support in-app purchase receipt validation (keys)
• Work closely with Unity developer to define clean API contracts
   

Technical Requirements (Must Have)

• 4+ years of backend development experience
• Strong knowledge of PostgreSQL
• Experience designing REST APIs
• Understanding of transactional systems & data consistency
• Experience with Node.js (NestJS) or Go
• Familiarity with authentication flows (OAuth)
• Ability to work independently and make technical decisions
   

Nice to Have

• Experience with PostGIS or geo-based queries
• Experience with mobile games or high-concurrency systems
• Understanding of anti-fraud / anti-cheat patterns
• Experience with cloud deployment (AWS / GCP / similar)

What This Is NOT

• This is not a large corporate project
• No heavy bureaucracy
• No 10-layer approval process
• You will not “just implement tickets” — you will shape the system
   

Engagement Format

• Full-time preferred
• Remote
• Direct communication with founder / product owner

About the role:

We’re building a modern multi-tenant SaaS platform with a strict TypeScript monorepo (frontend + backend).

Looking for a Senior Full-Stack Developer to work on new features, integrations, and performance improvements.

Tech stack:

• TypeScript (strict, no JS)
• React (hooks, context, custom state)
• Node.js (Express 5)
• PostgreSQL (Neon) + Drizzle ORM
• Vite, Tailwind CSS

What you’ll do:

• Develop and improve product features
• Work across frontend and backend
• Build and maintain integrations (payments, maps, AI)
• Optimize performance and scalability

• Keep a clean and strongly-typed codebase

   

Requirements:

• 4+ years of experience with JavaScript/TypeScript
• Strong experience with React
• Solid Node.js + REST API design
• Good SQL / PostgreSQL knowledge
• Experience with modern tooling (Git, Vite, etc.)

Nice to have:

• Stripe or SaaS billing systems
• Google Maps API / geospatial data
• Experience with OpenAI or Gemini
• Mailgun / Twilio integrations
   

Product highlights:

• RBAC & subscription-based access
• Integrations: Stripe, Google Maps, AI services
• Digital signature workflows

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
• Maternity recovery support allowance
• 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 are looking for a Middle Back-end Node.js Developer to join our team and work on a complex logistics SaaS platform (Rate Management System).

You’ll be working on

• Data-heavy systems
• Pricing and calculation logic
• Complex business workflows

• Scalable backend architecture

   

This is not a typical CRUD project — it involves real business logic, calculations, and system design.

Important
This role is focused specifically on Node.js backend development and core business logic.
Integrations related to AI, OCR, and document parsing are handled by a separate Python-focused role.

Responsibilities

• Develop and maintain backend services using Node.js (TypeScript)
• Design and implement REST APIs
• Work with complex data models (rates, contracts, pricing logic)
• Implement pricing and calculation logic
• Optimize performance for data-heavy operations
• Collaborate with frontend, QA, and PM

• Participate in code reviews and architecture discussions

   

Requirements

• 2+ years of commercial experience with Node.js
• Strong knowledge of TypeScript
• Experience with REST API design
• Experience working with PostgreSQL (or other relational databases)
• Understanding of async programming and performance optimization
• Experience with Docker (basic level is enough)

• Ability to work with structured and complex business logic

   

Nice-to-Haves (but not compulsory)

• Experience with microservices architecture
• Experience building scalable backend services
• Understanding of performance optimization for complex calculations

What We Offer

• Possibility to be a part of startups from around the world
• Supportive, understanding, and flexible management
• Paid vacations and sick leave
• A friendly and welcoming team

About the Team

• The team size is 23 members
• Well-organized development process involving project managers and QA
• Every developer specializes in their area (back-end, front-end)
• Dedicated teams for each project
• The team's internal communication languages are Ukrainian or russian
• Company-sponsored English lessons to support professional growth.

• Please include examples of your code with your application — this will save time for both you and us.
• If you have test results or any test documentation, feel free to share them as well. This will help us evaluate your skills much faster.
• A test task may be assigned before or after the interview.

We’re excited to offer a long-term opportunity for an experienced Back-end Developer (Node.js) to join a team of professional engineers and designers. Together, you’ll be working on a US-based product that’s set to make a significant impact on the PropTech scene. This role offers the chance to contribute to a major market and collaborate with top talent in a dynamic environment.
 

About ElevateOS Product

ElevateOS has been improving the resident experience for over seven years. We created a single, all-in-one platform that makes it easy for property managers and resident staff to work together. Our goal is simple: to provide the best experience for residents by replacing multiple, confusing apps with one easy solution.

This is a stable, long-term project that continues to grow, and you'll have the chance to be part of its ongoing success.

Our primary technology stack revolves around JavaScript. We use React for the front-end, Node.js for the back-end, and React Native for mobile development.

Requirements:

- 4-5+ years of development experience with Node.js;
- Practical knowledge of VanillaJS, Typescript, Express-like framework;
- Hands-on experience creating robust RESTful API’s and designing scalable back-end architecture;
- Proficiency with relational DB;
- Experience with integration with 3rd party REST and SOAP API's;
- Good knowledge of GIT;
- Experience delivering projects, using modern tools like CircleCI, Docker, Kubernetes and navigating through different environments like AWS, GCP.
- Good understanding of ECMAScript specifications;
- Proficient in the English language.

Additional (good-to-have) skills:
- Experience with MySQL, nginx, Stripe, Twilio, Redis
- Experience working in a product company rather than outsourcing.

What will your responsibilities include?
- Creating first-class back-end systems by writing clear, sustainable and well-tested code;
- Improving performance and refactoring existing code;
- Cooperating with the Product, UI/UX, QA and Front-end teams to fulfil project goals;
- Configure project environments and deployment procedures;
- Bugfix during the development process;
- Cover your code with unit tests;
- Write documentation.

We are looking forward to having you on board to contribute to our journey of transforming real estate property management!

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

🟩 What's in it for you:

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

✅ Is that you?

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

Desirable:

• Experience mentoring or providing technical guidance to engineers
   

🧩Key responsibilities and your contribution

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

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

Stack: Node.js, Python, Go. 
Strong preference for candidates with experience in Mystery Box / CS Open Case platforms (or similar high-load random drop systems).

English B2+

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 

A direct contract with the product company (PropTech, US).

Work schedule: remote CET business hours.

We’re excited to offer a long-term opportunity for an experienced Back-end Developer (Node.js) to join a team of professional engineers and designers. Together, you’ll be working on a US-based product that’s set to make a significant impact on the PropTech scene. This role offers the chance to contribute to a major market and collaborate with top talent in a dynamic environment.

About ElevateOS Product:

ElevateOS has been improving the resident experience for over seven years. We created a single, all-in-one platform that makes it easy for property managers and resident staff to work together. Our goal is simple: to provide the best experience for residents by replacing multiple, confusing apps with one easy solution.

This is a stable, long-term project that continues to grow, and you'll have the chance to be part of its ongoing success.

Our primary technology stack revolves around JavaScript. We use React for the front-end, Node.js for the back-end, and React Native for mobile development.

Requirements:

- 4-5+ years of development experience with Node.js;

- Practical knowledge of VanillaJS, Typescript, Nest.js;

- Hands-on experience creating robust API’s and designing scalable back-end architecture;

- Experience with managing data and using different types of databases (SQL and non-SQL) for storing and operating on data;

- Experience delivering (even small) projects, using modern tools like CircleCI, Docker, Kubernetes, Swarm and navigating through different environments like AWS, GCP, Digital Ocean.

- Good understanding of ECMAScript specifications;

- Good knowledge of GIT;

- Proficient in English language.

Additional (good-to-have) skills:

- Experience with Microservice Architecture;

- Experience working with AWS.

Responsibilities:

- Creating first-class back-end systems by writing clear, sustainable and well-tested code;

- Improving performance and refactoring existing code;

- Cooperating with the Product, UI/UX, QA and Front-end teams to fulfil project goals;

- Configure project environments and deployment procedures;

- Bugfix during the development process;

- Cover your code with unit tests;

- Write documentation.

We are looking forward to having you on board to contribute to our journey of transforming real estate property management!

About company and product

A Singapore seed-stage startup is a platform for fan communities that brings together communities around anime, K-pop, and other subcultures — all in one place. Our goal is to become the go-to fandom platform on the internet where every type of fandom in the world is found.

The mobile app is currently live on iOS and Android after launching our MVP, which was soon followed by Version 2.0, and the company are now building Version 3.0 with the goal of scaling toward our Series A.

📍About the role

At the moment we’re on a mission to find a Founding Engineer — 1st in-house tech employee — to help scale our platform toward Series A and beyond. We seek an ambitious Backend Engineer who’s experienced in building and scaling applications with thousands of users and would like to join us on a mission to build the future of how the world experiences fandoms.

This is a learning-intensive role aimed at building the expertise and foundation needed to eventually steer the company’s architectural direction.

Your core responsibility will be to own, understand, and optimize the backend systems of our mobile app. Your main focus will be to (1) build the algorithms that power our core user experience, and (2) strengthen the cloud infrastructure to support scaling to 1 million users.

What you will do during the first quarter – six months

The founding engineer will work closely with Uptech under the guidance of the Tech Lead, while collaborating within the Huddle team on high-level strategic decisions. 
 

– Design and implement the core recommendation and engagement algorithms.

– Collaborate with the Uptech and Huddle team to integrate algorithms into the system.

– Define data structures and pipelines to support algorithm efficiency and scalability.

– Test and refine algorithms to optimize performance.

– Contribute to high-level technical decisions around algorithm architecture and future enhancements.

📍Requirements for candidates

• You have 3-5 years of professional experience as a back-end engineer or full stack developer, preferably in high-growth startups or product-driven teams.
• You are comfortable working in a fast-paced environment, where priorities evolve quickly and execution speed matters.
• You take full ownership of technical outcomes and act as the primary technical decision-maker.

• Excellent communication English skills (both verbal and writing)

   

Backend & Data:

• Strong experience with Node.js and NestJS
• Solid knowledge of PostgreSQL
• Familiarity with NoSQL databases
• Experience designing APIs and data models for high-traffic systems
• DB performance optimization (indexes, queries, schemas)

Infrastructure & CI/CD:

• Hands-on experience with Amazon Web Services
• Infrastructure as Code with Terraform or similar tool
• Experience building CI/CD pipelines (tests, builds, deployments)
• Understanding of containerized deployments and rollback strategies

Code Quality:

• Experience with automated testing (unit / integration)
• Linters, formatters, and code review practices
• Focus on maintainable, production-ready code

Algorithms & Performance:

• CS / Math background
• Experience with feed or ranking algorithms
• Performance optimization: caching, lazy loading, preloading, thumbnails
• High-load experience is a plus

Nice-to-have requirements for candidates:

• Observability: Monitoring with Grafana observability stack (i.e. Prometheus)
• Experience in social platforms, community-based apps, or messaging products.
• Strong understanding of startup product cycles, from MVP to scale.
• Interest in building immersive environments (virtual spaces) or 3D avatar-based interactions.

• Interest in web applications.

   

Stages of communication:

1. Intro Call with recruiter — 30 min
2. Tech pre screen — 30 min
3. Competency-based interview — up to 1 h
4. Technical Assessment (2 stages): Tech Interview (2 h), Design Session (2 h)
5. Executive interview and Offer
    

___________________________________________

1️⃣ Benefits package for a Remote employee (B2) consists of:

• 14 days annual leave + up to 14 days paid sick leave after 3 month probation period pro-rated;
• Public holidays according to remote employee's (B2B) country of residence;
  * Employee covers social security, taxes, and medical insurance.
•  Salary with Equity.

2️⃣ Benefits package for an Onsite employee consists of:

• Relocation package Singapore (PR pathway, settling-in allowance; 
• One free annual round-trip flight to your home country;
• 14 days annual paid leave per calendar year;
• Up to 14 days sick leave and up to 60 days hospitalisation leave after 3 months of employment;
• Full basic medical insurance coverage, including outpatient treatment, hospitalisation, and dental care, subject to the insurer’s policy terms;
• Salary with Equity;
• Post-Funding Benefits;
• Office-based (hybrid flexible).

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

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

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

Our ideal candidate:

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

Requirements

Must have

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

Will be a plus

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

Responsibilities

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

About Project

Our client is a Software company from the USA.

Product

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

Stage

Active phase of development

Project team

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

Project Technologies

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

Work schedule

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

Interview Stages

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

🟢 At Dev.Pro, we work on projects that impact millions of people around the world — but we know it’s the people behind the tech who make it all happen. We truly value what makes each person unique and are building a workplace that’s inclusive, friendly, and supportive.

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

🟩 What’s in it for you:

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

✅ Is that you?

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

Desirable:

• Experience mentoring or providing technical guidance to engineers

🧩Key responsibilities and your contribution

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

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

🎾 What’s working at Dev.Pro like?

✔️ 30 paid days off per year — take them whenever you want for vacation, holidays, or personal time
✔️ 5 paid sick days, up to 60 days of medical leave, and 6 paid days off per year for major family events like weddings, funerals, or the birth of a child
✔️ Partially covered health insurance after the probation, plus a wellness bonus for gym memberships, sports nutrition, and similar needs after 6 months
✔️ Grow your skills with English lessons, online training, conferences, and the option to explore new career paths

Our next steps:

✅ Submit a CV in English — ✅ Intro call with a Recruiter — ✅ Internal interview — ✅ Offer

We are elai.io, an innovative AI-driven startup specializing in video generation. Recently acquired by Panopto, we’re now part of a growing team of around 250 professionals focused on advancing learning through powerful, interactive video technology.

We are looking for a hands-on Software Development Engineer in Test to design and implement our integration test automation strategy. The goal of this engagement is to build reliable integration coverage for critical audio/video flows, reduce regressions, and increase release confidence while enabling developers to own and maintain integration tests long term.

Contract details

• Duration: 3 months;
• Focus: integration test automation strategy implementation, CI/CD integration, and developer enablement;
• Engagement type: B2B contract.

Scope of work

1. Implement automated integration coverage across key system boundaries:
   •  API integration tests for Express + MongoDB (Supertest + isolated DB)
   •  Frontend-to-backend integration tests for critical flows
   •  Integration coverage for audio/video pipelines and artifacts;
2. Build and maintain the integration automation infrastructure;
3. Integrate tests into CI/CD as defined in strategy:
   • PR gates (API integration)
   • staging gate (integration smoke / critical flow suite);
4. Enable the dev team to own more integration tests:
   • create clear documentation (how to write/run integration tests, patterns, examples, DoD expectations)
   • prepare templates/snippets for common integration test scenarios
   • run knowledge-sharing sessions / workshops and support developers during adoption
   • actively encourage and coach developers to write integration tests as part of feature work.

Required skills

1. Strong hands-on experience implementing integration test automation (API + system/service integration);
2. Solid JavaScript and TypeScript testing experience in React and Node.js environments;
3. Strong experience with Playwright (for integration-level smoke flows where needed);
4. Experience with API testing (Supertest or equivalent) and database test isolation (MongoDB);
5. Proven experience validating audio and video artifacts in automated tests;
6. CI/CD experience, including test gates, parallel execution, artifacts, and stable pipelines;
7. Strong communication skills with the ability to document clearly and guide engineers toward better testing practices.

We offer

• Competitive salary based on qualifications and contributions
• Flexible working hours
• Opportunity to work with a highly qualified international, friendly team
• Fully remote work

We are looking for a talented Blockchain Engineer to design, develop, and maintain internal platforms, with a primary focus on backend development using Node.js.

In this role, you will also contribute to front-end features and blockchain-integrated systems. You will be responsible for building scalable services, integrating Web3 technologies, and supporting workflows for decentralized applications.

Responsibilities:

• Design and develop backend services using Node.js
• Integrate blockchain/Web3 technologies into existing systems
• Build and maintain scalable APIs and microservices
• Collaborate on front-end features when needed

• Ensure performance, security, and reliability of applications

   

Requirements:

• 5+ years of experience in software development
• Strong experience with Node.js
• Experience with blockchain technologies (Ethereum, smart contracts, Web3.js, etc.)
• Understanding of decentralized applications (dApps)
• Experience with REST APIs and microservices architecture

• Basic front-end knowledge (React or similar)

   

Nice to have:

• Experience with Solidity
• Experience with DeFi / NFT projects

• Familiarity with cloud platforms (AWS, GCP)

   

We offer:

• Remote-friendly environment
• Competitive compensation
• Work on innovative Web3 products

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

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

Key Responsibilities:

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

Qualifications:

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

What We Offer:

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