Jobs

Become part of United Tech as an experienced Node.js Backend Developer, contributing to high-performance, scalable products using modern technologies

About the team: join our Backend team, where collaboration and growth are at the heart of everything we do. We are a close-knit group of developers, Product Managers, DevOps, and QA specialists, all dedicated to helping our products thrive. With mentorship from seasoned experts and a strong sense of ownership, everyone here has a voice and can make a real impact.

Working in the social networking niche, we embrace challenges and celebrate progress. This is a dynamic field where you will stay on top of trends, tackle high-load systems, and dive into complex problems. The market is still growing, and there’s plenty of opportunity to carve out your own path and make a difference!
 

Know someone perfect for this role? Recommend a candidate and receive a bonus up to $1500
 

In this role, you will:
 

• Participate in team processes (grooming, sprint planning)
• Develop and deliver product tasks to the production environment
• Handle technical debt tasks
• Create technical designs for product epics
• Decompose epics into actionable tasks
• Investigate and resolve complex issues

It’s all about you:
 

• 4+ years of commercial backend development experience
• 3+ years of Node.js backend experience
• Proficiency with relational and non-relational databases (Postgres, MongoDB, Redis)
• Experience with SOA/Microservices architecture (communication, patterns, development process)
• Knowledge of WebSockets and messaging systems (RabbitMQ, Kafka)
• AWS experience (S3, Aurora, Cloudfront)
• Experience with scaling and high-load systems
• Strong Computer Science fundamentals
• Intermediate English level or higher

What we offer
 

• Care and support: 
• 20 paid vacation days, 15 sick days, and 6 additional days off for family events
• 100% medical insurance coverage
• Sports and equipment reimbursement
• Online yoga class with an instructor from the Ukrainian Yoga Federation
• 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
• Tech Interview
• Final Interview 
• Reference check
• Offer
   

Join the team of innovative high-end web & mobile development leaders!

WeSoftYou works with impact-first companies from all around the globe, using a data-driven approach and continuously increasing our operational effectiveness.

We create web and mobile solutions, as well as custom B2B and B2C applications for various industries and business areas, including Healthcare, e-learning, Retail, Web3, Fintech, and AdTech.

Project stack:
- Node.js + NestJS
- Prisma (ORM for PostgreSQL)
- Express Basic Auth, JWT
- class-validator / class-transformer
- Lodash, Dayjs, Pino (logger)
- Docker

👉  Required Tech Skills:

• 5+ years of professional experience as a Node.js Developer;
• Proficiency in NestJS;
• Experience with PostgreSQL or other relational databases.
• Strong understanding of API integration, webhooks, and event-driven architectures.
• Cloud experience: Familiarity with both Azure and AWS (EC2/S3/RDS/ ElasticCache) platforms.
• Data pipeline experience: Building and optimizing ETL processes for large datasets.
• Ability to work independently in a dynamic environment.

👉  Nice to have:

• Experience with ETL.

   

👉 Responsibilities:

• Develop new features in the project;
• Write reusable, testable code;
• Reviewing the code of teammates;
• Reviewing your implemented code in the dev environment;
• Participate in the grooming process.

👉 What we offer:

🎁 Benefits program:

• 18 working days of fully paid vacation, 5 days of compensated sick leaves;
• Help with individual entrepreneurs’ questions and accounting support
• financial aid and additional days off for various occasions (e.g. marriage, childbirth, etc);

😌 Comfortable Working conditions:

• Flexible working hours;
• Provision of required equipment;

• Remote working model.

   

👥 Community:

• To build community among our employees we keep going with:
• Various corporate events (psychological training, based on employees’ needs to care about mental health, New Year celebration, summer party, team buildings, etc.);

• Open door culture (regular one-two-one meetings with HR/PM/Manager).

   

TeqBlaze, a trailblazer in the AdTech industry, is looking for a Senior Node.js Developer who is passionate about quality, thrives in fast-paced environments, and is eager to make a tangible impact in AdTech.

Requirements:

• Clean Code: Ability to write clean, maintainable, and well-documented code, following coding standards and best practices;
• Unit Testing: Experience with unit testing frameworks and the ability to maintain comprehensive test coverage;
• Strong Debugging Skills: Expertise in identifying and resolving issues efficiently;
• Network Protocols: Knowledge of network protocols such as HTTP, TCP, and FTP;
• Database Expertise: Familiarity with SQL, NoSQL, and in-memory key-value databases for data storage and optimization;
• Asynchronous Programming: Deep understanding of asynchronous programming in Node.js and how the event loop operates;
• Willingness to Learn: A growth mindset with the ability and desire to learn new technologies and enhance existing skills.
• Basic Linux Server Administration: Experience with Linux servers, handling basic administration tasks;
• High-Load Systems: Knowledge and experience with high-load systems, ensuring scalability and stability under heavy traffic;
• Performance Optimization: Strong skills in optimizing system performance, ensuring the backend runs smoothly and efficiently even under stress.

Responsibilities:

• Develop and Maintain Backend Services: Build and maintain scalable and efficient backend services using Node.js, ensuring they meet business and performance requirements;
• Optimize Application Performance: Continuously work on enhancing the performance of backend systems, ensuring they are robust and efficient;
• Testing & Quality Assurance: Write and maintain unit tests to ensure high code quality, reliability, and functionality;
• Debugging & Issue Resolution: Identify, debug, and resolve issues within backend systems to ensure smooth operations;
• Database Management: Manage and optimize SQL and NoSQL databases, ensuring data integrity and performance across the syste;
• Collaborative Work: Work closely with the team lead, frontend developers, CTO, Delivery Coordinator, and other team members to ensure seamless integration and alignment across the development process;
• Continuous Learning: Stay updated on new technologies and best practices, applying them to improve the backend systems.

At TeqBlaze, innovation isn’t just what we do—it's who we are. As a leader in the AdTech sector, we're reshaping how digital advertising operates globally. Our mission is to craft cutting-edge white-label programmatic solutions that not only meet but anticipate the needs of our clients. With a focus on technology and a flair for creativity, we transform challenges into opportunities and data into insights.

Our team is a powerhouse of industry experts who thrive on the latest trends and technologies. By joining us, you become part of a dynamic community that values bold ideas and collaborative problem-solving.

Perks of working at TeqBlaze:

• Tailor your work environment to fit your lifestyle with options ranging from fully remote to hybrid, or immerse yourself in our dynamic office settings in Kyiv, Lviv, Odesa, or Mykolaiv.
• Propel your professional journey forward with access to many resources, including specialized courses, industry conferences, and a vast electronic library.
• Your efforts and achievements are valued here, reflected in performance-based salary reviews that reward your contributions.
• Enjoy a well-rounded life with 22 paid vacation days annually, comprehensive health coverage, paid sick leaves, and access to professional mental health resources.

If you have a knack for detail-oriented work and are looking for an opportunity to collaborate with a team of talented professionals, this is your chance to play a pivotal role in shaping the future of advertising technology. Dive into a role where your efforts are recognized and rewarded as you help us propel our business and our clients' success forward.

Ready to elevate your career at TeqBlaze? We're excited to see what you can bring to our team!

We are looking for a talented and experienced Blockchain Node.js Developer who thrives in a fast-paced environment and is ready to tackle new challenges.

Responsibilities:

• Write efficient, maintainable code
• Ability to efficiently design and implement separate self-sufficient components
• Participate in architectural discussions and technical decision-making
• Identify potential technical risks and develop mitigation strategies
• Ensure knowledge is effectively shared and maintained within the team
• Foster a collaborative and innovative development environment
• Perform cross code-review with team members
• Properly maintain documentation

Requirements:

• 4+ years of experience with server-side JS/TS
• Solid understanding of TypeScript, JavaScript fundamentals and internals
• Experience with NestJS
• Flexible approach in regard to different programming languages/technologies
• Proven experience using any other stack (.NET/Go/Java/C++, etc.)
• Strong understanding of asynchronous programming, event-driven architecture, and non-blocking I/O
• Hands-on experience with Web3.js or Ethers.js for interacting with Ethereum or other EVM-compatible networks
• Understanding of smart contracts
• Familiarity with popular blockchains like Ethereum, Binance Smart Chain, or Layer 2 solutions
• Expertise in data structures, algorithms, and software design patterns
• Solid understanding of different software architectural patterns
• Experience with different RDBMSes (MySQL/PostgreSQL)
• Experience in writing complex SQL queries and their optimization
• Experience with different kinds of ORMs
• Familiarity with Docker, containerization and orchestration tools
• Strong analytical skills with the ability to think critically and solve complex issues
• Proficiency in writing unit tests, integration tests, and end-to-end tests

Will be a plus:

• Familiarity with DevOps practices and infrastructure as code tools
• Understanding of consensus algorithms, cryptographic principles, and decentralized applications (dApps)

We offer:

• Competitive compensation
• Social package (24 working days of annual leave, 5 paid sick days)
• Flexible working hours
• Challenging projects in diverse business domains and a variety of tech stacks
• Personal development and professional growth opportunities
• Work with talented, ambitious and family-feel teams
• Educational possibilities: corporate courses, knowledge hubs, and in-house English classes
• Compensation for your professional certification & support for your learning activities
• Opportunity to choose IT equipment you like
• Corporate social responsibility

Globy, an innovative product company, is seeking a skilled Middle Node.js Developer to join our dynamic team. In this role, you will contribute to the development of cutting-edge backend systems using modern technologies. Your expertise will drive the creation and optimization of scalable services, with a particular focus on developing new features and subscription-based payment systems using Stripe.

Key Technologies:
 

• NodeJS

• ExpressJS

• MongoDB & Mongoose

• Redis

• HTTP

• Socket.io

• Microservices Architecture

• Docker

Responsibilities:
 

• Design, develop, and maintain high-performance backend systems.

• Implement and enhance subscription functionalities using Stripe.

• Build RESTful APIs and integrate middleware solutions.

• Collaborate with cross-functional teams to design robust, scalable applications.

• Optimize database design and queries (SQL and NoSQL).

• Ensure adherence to backend security and authorization best practices.

• Troubleshoot, debug, and upgrade existing software.

Requirements:
 

• 4+ years of professional experience in Node.js development, demonstrated through both commercial projects and personal initiatives.

• Strong proficiency in ExpressJS, middleware integration, and asynchronous programming.

• Deep understanding of HTTP, RESTful APIs, and API documentation standards (e.g., Swagger).

• Proven experience working with databases (both SQL and NoSQL), including design and optimization.

• Solid background in backend security principles and authorization practices.
 

 Essential: 

• Demonstrated experience in developing subscription-based payment systems using Stripe or similar. 

• Exceptional problem-solving skills, keen attention to detail, and a passion for continuous learning.

Benefits:

• Completely Remote Position 

• Competitive Salary in USD

• Professional Growth 

• Collaborative Environment

We’re looking for a Senior Node.js Engineer in Lviv to join our team which cooperates with a Brazilian Time & Attendance startup.

Project Description

Our client is a Brazilian Time & Attendance startup. Our system allows us to ensure that employees follow the assigned schedule and track their time when they work out of the office.

Our team has been building the technical part of this product from the very beginning. We have already started working with companies with more than 1000 employees.

We are looking for a mature, challenge-driven engineer to reinforce our team and help us build a high-quality product. The project is growing and dynamic and affects the salaries of thousands of people across Brazil.

From the back-end perspective, the product is:

• A service-oriented system that operates inside the Kubernetes cluster
• All the services are written in Node.js, except one built using Ruby on Rails
• API for mobile and web applications
• Third-party Integrations with popular SaaS platforms and partners

Requirements

Must have

• Experience with Node.js
• Experience in designing and developing scalable systems
• Experience in relational databases, ex. PostgreSQL.
• Strong knowledge of Javascript. Experience with Typescript would be a plus.
• Message brokers
• Experience with Docker
• Upper Intermediate English

Nice to have

• Experience working with Kubernetes
• GCP, Prometheus, Grafana
• Experience with writing unit and integration tests with focus on effectiveness and not coverage
• Experience with non-relational databases: Neo4j, Druid, Kafka, Redis
• Basic Linux system administration
• Would be great: Experience with Temporal
• Experience with CI/CD pipelines, most likely Github Actions.

Responsibilities

• Extending the functionality of the existing API (Node.js)
• Designing and building new features (most likely on Node.js/Typescript/Nest but technology is negotiable)
• Improving performance and scalability
• Preparing system for international expansion

What you get

• Meaningful work
• No time tracking
• Like-minded people
• Strong engineering culture
• Organic professional growth
• Work-life blend
• 20 vacation days
• Sick leaves until you get well
• Medical care & wellbeing
• Social responsibility
• Family-friendly space
• Gym with a personal trainer
• Office culture & supreme continuity
• BBQ parties, poker nights, office hookah, bike community and more

Job Description:
We are looking for a talented Nest.js Developer with 3+ years of experience to join our team. You will be responsible for building scalable backend services and APIs while leveraging modern technologies and cloud infrastructure.

Responsibilities:

• Develop and maintain server-side applications using Nest.js.
• Design and implement APIs with Node.js and TypeScript.
• Manage database operations using Prisma ORM and PostgreSQL.
• Optimize application performance and scalability on AWS infrastructure.
• Ensure code quality and maintainability through best practices and testing.

• Collaborate with frontend developers and other team members to deliver seamless user experiences.

   

Requirements:

• 3+ years of experience in JavaScript, TypeScript, Node.js, and Nest.js.
• Hands-on experience with AWS services (e.g., Lambda, S3, RDS).
• Proficiency in Prisma ORM and working with PostgreSQL databases.
• Strong understanding of RESTful API design and implementation.
• Familiarity with CI/CD pipelines and containerisation (Docker is a plus).

• Problem-solving mindset with attention to detail and clean coding standards.

   

Preferred:

• Experience with Elastic Search
• Experience with automated testing frameworks
• Background in agile development workflows

BNX Media is a full-cycle digital marketing agency powered by growth and results. Our specialists form a team of professionals who approach every challenge with passion and determination. We don't just work for our clients; we create real opportunities for their growth. Every project is a chance for us to deliver the best results. Our clients' success is our goal, and we are ready to pursue it together!

Job Description: 

We are seeking an experienced TypeScript Node.js Developer to join our backend development team. The successful candidate will be responsible for developing web applications, APIs, microservices, integrations, and internal scripts/utilities. This role emphasizes building robust and scalable code, ensuring code quality through automated tools, and collaborating effectively with cross-functional teams. While prior experience with AdonisJS is not required, the candidate should be willing to contribute to projects involving this framework as needed. 
 

Key Responsibilities: 

• Develop and maintain web applications, APIs, microservices, integrations, and internal scripts/utilities using TypeScript and Node.js. 
• Create distributable and reusable libraries and SDKs for both internal and public use. 
• Collaborate with cross-functional teams to define and implement new features and enhancements. 
• Ensure code quality and adherence to coding standards by utilizing tools like ESLint and Prettier. 
• Containerize applications correctly using Docker, focusing on statelessness and environment-based configurations. 
• Interact with queue systems and message brokers such as Redis or RabbitMQ to implement asynchronous processing. 
• Utilize query builders like Knex.js and ORMs such as Lucid for efficient database interactions. 
• Troubleshoot and resolve technical issues in existing codebases. 
• Stay current with the latest TypeScript and Node.js features, updates, and industry trends. 
• Contribute to projects involving AdonisJS as required; prior experience is not mandatory, but a willingness to learn is essential. 

Qualifications: 

• Demonstrated experience as a Node.js Developer with a strong focus on TypeScript. 
• Proficiency in developing web applications, APIs, microservices, and integrations. 
• Strong understanding of Node.js and its core principles, including event-driven architecture, non-blocking I/O, and asynchronous programming patterns. 
• Experience with module bundlers and package managers, such as Vite, Rollup.js, npm, and Yarn. 
• Ability to correctly containerize applications using Docker, emphasizing stateless design and environment-based configurations. 
• Experience interacting with queue systems and message brokers such as Redis or RabbitMQ. 
• Proficiency with query builders like Knex.js and ORMs such as Lucid for database interactions. 
• Familiarity with RESTful API design and implementation. 
• Knowledge of version control systems, particularly Git. 
• Ability to ensure code quality using automated tools like ESLint and Prettier. 
• Problem-Solving Approach: A proactive attitude towards tackling challenges, with a willingness to explore and learn new solutions. Openness to collaboration and seeking assistance when needed to find effective outcomes. 
• Best Effort Commitment: Dedication to giving your best effort in all tasks, striving to achieve high-quality results even when faced with complex problems. 
• Strong communication and teamwork skills. 
• Desirable: Experience with AdonisJS is a plus but not required. 
• English language skills at B2/C1 level.
  
  With us you will get: 
• Flexible start of the working day (9:00-17:00, 10:00-18:00, 11:00-19:00). 
• Comfortable office with modern equipment. 
• Health insurance, which is fully covered by the company.
• Professional development courses.
• Mental health services.
  
  Send your resume and we will tell you all the details!

We are building a smart and powerful new platform that allows any customer to find, purchase, connect, and manage digital products in a new and completely seamless way.

Our platform aims to simplify the entire customer journey from selection, to purchase and on through connection and launch by challenging the status quo and antiquated way of doing things like setting up DNS, managing subscriptions, not being able to easily switch between products and add-ons, and revolutionizing those processes through the smart use of technology to bring forth better and more meaningful solutions.

Your expertise:

• Strong proficiency with JavaScript (ES6+)
• Knowledge of TypeScript and willingness to work with it
• Understanding and experience with Node.js server-side development
• Knowledge and experience with Docker
• Knowledge and experience with SQL
• Experience with one of the big cloud providers (AWS / Azure / GCP)
• Understanding the nature of asynchronous programming and its quirks and workarounds
• A strong culture of clean code and engineering excellence
• Understanding of Object-Oriented programming paradigm
• Understanding of SOLID principles in practice
• Knowledge of software design patterns & ability to apply them consciously
• Knowledge and experience with automated testing platforms and unit tests
• Understanding of HTTP protocol
• Knowledge of web security threats and ways to mitigate them
• Proficient understanding of Git
• Experience with DevOps practices — the ability to work with an application on all lifecycle stages: development, environment creation, maintenance on real environments
• Systematic approach to problem-solving
   

Will definitely be a plus:

• Knowledge other than JavaScript / TypeScript programming languages
• Understanding of client-side scripting
  • understanding of event loop, micro and macro tasks, and their influence on code
  • understanding the browser as a platform and browsers instruments for code debugging
• Experience with React and its infrastructure
• Competent use of English (reading, writing, and speaking)
   

What’s in it for you?

• Opportunity to deal with top-notch technologies and approaches in a world-leader product company with millions of customers
• Opportunity to make a difference for online privacy, freedom of speech, and net neutrality
• Decent market rate compensation depending on experience and skills
• Developed corporate culture: no micromanagement, culture based on principles of truth, trust, and transparency
• “You build it, you own it” mentality in most contexts
• Support of personal and professional development
  • coverage of costs of external trainings, conferences, professional literature
  • support of experienced colleagues
  • in-house events and trainings
  • regular knowledge sharing in teams
  • English classes and speaking clubs
• Life-balance support
  • truly flexible schedule, no time-tracking at all
  • 25 working days of vacation
  • 5 days of paid sick leave per month (if necessary) without providing a medical certificate
  • generous maternity leave program
• Professionally strong environment, friendly and open atmosphere, ability to influence the product development and recognition for it

You will be involved into:

• Full cycle development, implementing new features on BE (on FE on occasion)
• Introduce expertise and capability to deliver desired functionality
• Design, implementation, and coverage with tests of the system according to the product vision
• Validate software functional and non-functional requirements
   

Job Description 

We are developing fitness apps for the German market and are seeking a talented and experienced TechLead developer. 

The ideal candidate possesses a strong product mindset and a deep understanding of database and backend architecture, with expertise in designing APIs for web and mobile client apps, as well as in integrating and communicating with third-party tools such as Zapier, HubSpot, Firebase Cloud Messaging, Apple Health, and Fitbit.

Requirements:

• 6+ years of proven experience as a JS Fullastack Developer with a strong portfolio showcasing distributed micro-services architecture with NestJS using message brokers for communication (NATS, RabbitMQ, Kafka).
• Experience with deploying and maintaining the backend applications using AWS.
• Deep understanding of API design patterns for robust communication between microservices.
• Experience with setting up appropriate security patterns to ensure data safety. 
• Hands-on experience with integrating Search solutions such as Typesence, ElasticSearch or Algolia.
• Solid knowledge of Typescript, Prisma ORM, Supabase Auth, Supabase DB, Docker, Docker Compose, AWS ECS, AWS Fargate, AWS S3, AWS IAM, Redis and GitHub CI/CD.
• Deep understanding of client-server communication patterns, caching, session and state management.
• Good understanding of system design and ETL processes (as we will work with external data sources)
• Experience with mono-repos (Turbo, Nx) and PNPM would be an advantage
• Strong communication and collaboration skills
• Ability to adapt to changing project requirements and manage multiple tasks simultaneously.
• Knowledge of the fitness industry and familiarity with fitness applications and trends are a plus.

Preferred Qualifications:

• Experience working on projects that include nutrition tracking, workout plans, progress tracking, and communication with external APIs.
• Familiarity with integrating wearable technology, smart devices and synchronisation with external fitness tracking systems such as Apple Health, Fitbit, and Garmin.
• English B2 level is required.
• German B2 + would be an advantage

Key Responsibilities:

• Development of server-side APIs with a distributed micro-services architecture and business logic, including communications with external systems and databases.
• Supporting the team with the development of mobile and web (client) applications, by focusing on reusable and easy-to-use APIs to be used by mobile and web developers.
• Collaboration with stakeholders to gather and analyze requirements, ensuring alignment with business goals and user needs.
• Participate in brainstorming sessions and contribute innovative ideas to enhance the user experience.

We are seeking an experienced Backend Engineer to join our Multichannel team. In this role, you will be responsible for designing and implementing backend services to connect Reflaunt with various marketplaces. You will work closely with other developers, Project managers, and stakeholders to ensure the applications meet the needs of our users and business requirements.

RESPONSIBILITIES

• Design and implement Serverless services with Typescript.
• Collaborate with other developers on system architecture and contribute to engineering strategy.
• Write clean, maintainable, and scalable code
• Troubleshoot and debug issues as they arise
• Participate in code reviews and provide constructive feedback to other developers

SKILLS AND REQUIREMENTS

• At least 3 years of experience in backend development
• Proficiency in Typescript, AWS, Serverless, PostgreSQL
• Strong problem-solving skills and attention to detail
• Excellent communication and teamwork skills

PERSONAL QUALITIES 

• Have initiative: someone who is independent and offers valuable suggestions
• Be disciplined: someone who produce results without being constantly nagged
• Be hard-working: willing to work in highly dynamic and challenging startup environment
• Be focused on impact and results.

WHY JOIN THE TEAM

• Empowerment: We trust our talented team. Whatever your ambitions or ideas, we

encourage you to go after them and will support you

• Growth: A super rich experience in an early stage startup: you’ll have an impact on the global strategy, and you’ll be very close to the founding team
• Green environment: promoting green, ecological product, working with fashion-brands
• Opportunity to work remotely

Hey there!
 

We are seeking a talented, self-motivated Node.js Engineer to join our team and work on AI-driven projects across various domains.

As a key team member, you will foster collaboration, drive innovation, and play a pivotal role in advancing both team and company growth.

Required skills:
 

• 4+ years of experience in Node.js development, including frameworks like Express and Nest.js.
• Strong functional knowledge and hands-on experience in designing web services.
• Expertise in software architecture, design patterns, and object-oriented programming.
• Solid understanding of cloud infrastructure, including pricing and deployment models.
• Experience working with both relational and NoSQL databases.
• In-depth knowledge of Agile methodologies (Scrum).
• Proven track record of working in fast-paced Agile environments.
• English proficiency at B2 level or higher.

Responsibilities:
 

• Develop and maintain scalable cloud-based applications with a focus on performance and reliability.
• Contribute to the architecture and optimization of backend solutions under the guidance of senior engineers.
• Analyze and improve existing platforms, suggesting enhancements and optimizations.
• Participate in technical discussions and collaborate on architectural decisions.
• Follow best practices in software development, including CI/CD, testing, and performance tuning.
• Stay updated on new technologies and propose relevant improvements.
• Work closely with teammates to ensure smooth development and integration.
• Support the full development lifecycle, from implementation to deployment and maintenance.

Will be a plus:
 

Crypto industry knowledge
Experience with SaaS solutions.
Experience with user management platforms.
Experience in deploying analytics and using data insight.

The stack of the project:
 

Node.js

Nest.js
Express.js
MongoDB

MSSQL
Firebase
Kotlin
Compose Multiplatform
Firebase
Ktor
Koin
SendGrid
HTML, CSS
Web services
Object-oriented programming

Responsibilities:

• Develop and maintain the backend of web applications using NestJS
• Design and optimize PostgreSQL databases
• Implement caching and queueing solutions with Redis
• Develop and integrate APIs
• Integrate third-party APIs and payment systems
• Optimize code and perform refactoring to improve performance
• Collaborate with the DevOps team for CI/CD and monitoring (Docker, AWS).
   

Requirements:

• Strong experience with Node.js and NestJS
• Hands-on experience with PostgreSQL (indexes, query optimization)
• Experience with Redis (caching, pub/sub)
• Proficiency in TypeScript
• Solid experience integrating third-party APIs and payment systems (must-have)
• Understanding of design patterns and architectural principles (SOLID, DRY, KISS)
• Experience working with Docker and containerization
• Familiarity with logging systems (e.g., Winston, Pino) and monitoring tools (New Relic, Prometheus, Grafana)
• Experience with RabbitMQ/Kafka is a plus
• Experience with unit and integration testing (Jest, Supertest) is a plus
• Good spoken English not lower than B1 for meetings and communication with clients.

Workflow:

• Remote work
• Work from 9:00 to 18:00 Monday through Friday
• Daily morning standups with the team
• Meet with clients as needed
• Work with the time tracker Hubstaff
• Progress reports 
• Work contract from 1 year

We Offer:

• Competitive salary.
• Social package.
• Opportunities for professional and career growth.
• Work in a friendly and professional team.

About US:

- CONSTANT SEARCH FOR THE BEST SOLUTIONS
We create the best solutions for our customers.

- Solutions
We are here to help you. We will carefully examine your request, get into the details, and offer the best solutions for your business.

- Development
Our projects are based on the understanding and processes of our clients' business. All decisions are made based on user needs. We are always looking for the best ways to solve tasks with the attraction of innovative technologies.

- Team
We’re a tight-knit team of creative minds. We collaborate with our clients to make awesome products that get results.

- Our Approach
Our experience is based on many years of successful work based on research, study, and implementation. We are open to new knowledge and always improve our level and thanks to this our projects are always successful. Each project is unique and we do not accept template solutions.

 

Our company is a forward-thinking, innovative startup committed to building the next generation of secure, multi-functional crypto solutions, designed to meet the demands of a rapidly evolving digital landscape. While we embrace the energy and agility of a modern startup, our approach to quality and security is built on a foundation of reliability and industry best practices. Our focus on robust technology, data protection, and seamless user experience ensures that we consistently deliver dependable products that our users and partners can trust.

At our company, we believe that our team is our greatest asset. Here are just a few benefits of joining our team:

1. Growth Opportunities: We are invested in the personal and professional development of our team members
2. Innovation at the Forefront: Working with us means being part of pioneering projects in blockchain, crypto security, and decentralized finance. You’ll be part of a team that’s passionate about driving change in the tech space, with the resources and freedom to bring your ideas to life.
3. Impactful Work: As a key contributor to our team, your work will have a direct impact on the success of our products and the satisfaction of our users. You’ll play a vital role in shaping the future of secure digital finance.

By joining our company, you’ll experience the thrill of a startup environment with the confidence that you’re backed by a team committed to reliability, excellence, and long-term success. Together, we’re building the future — one secure transaction at a time.

Main Responsibilities:

As a Backend Developer, you’ll design and maintain secure, scalable APIs using TypeScript (NestJS) and manage PostgreSQL databases with TypeORM. You’ll integrate multiple blockchain networks, handle secure key management, and optimize database performance. You’ll implement microservices architecture, manage third-party API integrations for payments, crypto exchanges, and KYC services, and ensure robust testing, logging, and monitoring

Mandatory Requirements:

– TypeScript expertise, especially with NestJS for building RESTful APIs
– Experience with TypeORM
– Proficiency in PostgreSQL for database design, SQL optimization, and performance tuning
– Understanding of API Security (JWT, OAuth) and data encryption

Blockchain Integration:
– Familiarity with blockchain basics and concepts
– Knowledge of private key management and multi-signature wallets

System Design & Architecture:
– Experience with microservices and scalable system design
– Familiarity with event-driven architecture and message brokers
– Understanding of database transactions and query optimization

Third-Party Integrations:
– Integrating payment gateways
– Knowledge of KYC/AML service

Experience:
– 3-5 years in backend development, with 2+ years using TypeScript/NestJS
– Experience in blockchain projects is a plus

We offer:

– Vacation Days: We offer 20 days of paid vacation per year, allowing our team to recharge and maintain a healthy work-life balance
– Sick Days: Employees have 5 paid sick days annually to take the necessary time off for health and wellness
– Overtime: While we strive to maintain a balanced workload, any overtime is compensated at a premium rate or offered as additional time off, depending on employee preference

Job Description

• Collaborate on the development and integration of AI-driven features, leveraging the latest advancements in LLM and NLP
• Conduct research and experiments to explore innovative AI methodologies and incorporate cutting-edge models into customer care products
• Take responsibility for the entire lifecycle of feature developments, from initial discussions with product teams, defining requirements and providing estimates, to actual coding in collaboration with the team, monitoring performance and delivering robust solutions to end-users
• Optimize system performance, reliability and stability, making sure our service remains seamless and accessible
• Participate in technical discussions to improve existing architecture and developer experience

Requirements

• 5+ years of experience as a Server Engineer
• Proven ability in designing server solutions, API design, and handling technical discussions
• Experience implementing and integrating gen-AI models, particularly large language models (LLMs) into production systems
• Passion for product development
• Understanding of business objectives and goals and how to transform business problems into actionable tasks
• Strong communication skills
• Proficiency with Large Language Models, including prompt engineering, fine-tuning, automatic evaluation and Retrieval-Augmented Generation (RAG) — an advantage

About the Team

The Chatbot team’s mission is to make the Customer Care Chatbot the principal choice for users seeking solutions during their Wix experience. We are committed to developing an AI Chatbot that leverages Wix’s knowledge and relies on contextual cues to determine the most appropriate next action to facilitate the user’s journey.

About Wix

Wix makes it possible for anyone to succeed online.

Since 2006, we’ve grown to around 5,500 employees in 22 countries, launched over 40 products, and serve over 243 million users and their visitors worldwide.

At Wix, we push you to innovate, evolve in non-traditional ways, and collaborate. We operate in small teams that work closely together at a high level.

Although we’re already industry leaders in web creation and business, our work is nowhere near done. Our goal is to become the main engine of the Internet so we can create a more open web for all.

We’re proud to be an equal opportunity company. Wix was built around the idea that everyone has the right to be successful, online. This same vision defines us as a company: creating a work environment where everyone is welcome, and anyone has the right to succeed.