Jobs

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

About us:
Cowchain have successfully completed 120+ projects mainly on EVM-based blockchains such as Ethereum, Polygon, Arbitrum, Base including Coinmarketcap leaders with 180M+ total capitalization and 20M+ daily trading volume in Move2Earn, Play2Earn and DeFi industries.

Required skills:
— At least 3-year commercial experience in the Backend development
— Node.js experience is A MUST
— Ability to use Solscan to analyze data;
— Compiling, signing and sending transfer transactions;
— Compiling, signing and sending swap transactions;
— Transaction mult-signatures
— Pump.fun / Jupiter / Raydium;
— Bignumber.js / bn.js
— Understanding of gas, priority fee, token account creation
— Meme-coin creation Pump.fum/Meteora
— JIRA, gitflow

Tech stack:
— Node.js, Nest.js, Microservices
— MYSQL, MSSQL, PostgreSQL
— TheGraph (Subgraph), Event indexing back-end
— Azure, AWS, Google Cloud
— Docker, Kubernetes

Will be a plus:
— EVM-based blockchains (Ethereum, Avalanche, Polygon, Binance Smart Chain, Velas, Hedera etc)

What will you do:
— New features development;
— Bugfixes and support existing solutions;
— Participate in project architecture discussions;
— Build solutions from scratch as well as join on-going development process;
— Have fun)

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

Join us at Provectus as part of a team dedicated to building cutting-edge technology solutions that have a positive impact on society. Our company specializes in AI and ML technologies, cloud services, and data engineering, and we take pride in our ability to innovate and push the boundaries of what's possible.

We are seeking a talented and versatile Full-Stack Engineer with strong experience in Next.js to join our innovative team.

Requirements:

• 5+ years of experience in front-end development;
• Production experience with Next.js v13+ (App Router, Server Actions);
• Experience with Nest.js;
• Solid knowledge of TypeScript;
• Solid understanding of relational and non-relational databases (Aurora, DynamoDB);
• Familiarity with ChakraUI or similar UI Component Libraries;
• Proficiency in writing unit and integration tests;
• Full application lifecycle experience;
• Excellent communication and collaboration skills;
• Understanding of design patterns and software architectures;
• Experience with cloud services, preferably AWS Cloud;
• Proficiency with GIT for version control.

Preferred Qualifications:

• Experience with AWS services;
• Experience setting up CI/CD pipelines;
• Understanding of testing principles and experience with testing tools.

Responsibilities:

• Write well-designed, testable, efficient code by using best software development practices;
• Work closely, collaboratively, and creatively with product owners to build a user experience to support the business users' needs;
• Work well in a team environment of 4 - 5 developers, but taking individual ownership of deliverables and ensuring quality through comprehensive unit tests;
• Code optimization and performance with best practices in Javascript;
• Create a user interface by using standard HTML/CSS practices;
• Gather and refine specifications and requirements based on technical needs;
• Ensure cross-browser capability of code and HTML markup;
• Create and maintain software documentation;
• Stay tuned with the recent Web technologies.

FAVBET Tech develops software that is used by millions of players around the world for the international company FAVBET Entertainment.
We develop innovations in the field of gambling and betting through a complex multi-component platform which is capable to withstand enormous loads and provide a unique experience for players.
FAVBET Tech does not organize and conduct gambling on its platform. Its main focus is software development.

Main areas of work:

• Betting/Gambling Platform Software Development — software development that is easy to use and personalized for each customer;
• Highload Development — development of highly loaded services and systems;
• CRM System Development — development of a number of services to ensure a high level of customer service, effective engagement of new customers and retention of existing ones;
• Big Data — development of complex systems for processing and analysis of big data;
• Cloud Services — we use cloud technologies for scaling and business efficiency.

Requirements:

• 4+ years of commercial experience in Node.js (Fastify/Koa/NestJS would be a +).
•    Strong skills in relational and NoSQL databases (PostgreSQL, MySQL, Redis, MongoDB).
•    Strong expertise in TypeScript.
•    Experience with CDN implementation and performance optimization
•    Unit/integration/load tests
•    Understanding of design patterns, clean architecture.

•    Proven track record in developing scalable, enterprise-level solutions

   

  Responsibilities :

•   Implementation of API migration to a new approach
•    Development of new features and new parts of the services
•    Handling complex problems that might arise during solution development and provide field support with creative and rapid solutions  
•    Constantly improving code organization and evolving application design
•    Writing new and updating existing integration tests

We offer:

• 30 days off per year (vacation and sick days) — we value rest and recreation. We also comply with the national holidays.
• Medical insurance for employees and the possibility of training employees at the expense of the company and gym membership.
• Remote work; after Ukraine wins the war — our own modern lofty office with spacious workplace, and brand-new work equipment (near Pochaina metro station).
• Flexible work schedule — we expect a full-time commitment but do not track your working hours.
• Flat hierarchy without micromanagement — our doors are open, and all teammates are approachable.

During the war, the company actively supports the Ministry of Digital Transformation of Ukraine in the initiative to deploy an IT army and has already organized its own cyber warfare unit, which makes a crushing blow to the enemy’s IT infrastructure 24/7, coordinates with other cyber volunteers and plans offensive actions on its IT front line.

Sharkscode is looking for a Node.js Engineer to join our team!

To achieve the results you’ll need:
- 5+ years of commercial development experience with Node.js, Express.js;
- Deep knowledge of MongoDB, MySQL, PostgreSQL(optional), redis(optional);
- Experience with queues (rabbit);
- Experience in connecting third-party services, designing/writing API;
- Understanding of the specifics of working with distributed systems

Will be a plus:
- TypeScript, nest;
- Experience in covering code with autotests (Unit/Integration/E2E);
- Experience with high-load systems

How exactly you'll influence the company’s progress:
- Design and develop a product;
- Develop integrations with third-party financial and technical services;
- Design and develop public payment web services and internal microservices;
- Participate in decision-making on the feasibility of using certain technologies/practices at the platform level;
- Follow a development culture and share the knowledge already acquired with the team.

For comfortable and effective cooperation we offer the following:
- Opportunity to influence and feel your impact inside the company;
- Compensation that grows alongside your achievements;
- Paid vacation (17 days/year) and sick leaves;
- Medical insurance;
- Budget for conferences, seminars, and training that will help you grow as a professional;
- Free English courses;
- Flexible working hours;
- We have a cozy, modern office filled with everything you need in the historic center of Kyiv with free parking places.

Our stages: 

Interview with recruiter-> Tech Interview-> Offer

Valencia, Spain

BrainRocket is a global company creating end-to-end tech products for clients across Fintech, iGaming, and Marketing. ‍Young, ambitious, and unstoppable, we've already taken Cyprus, Malta, Portugal, Poland, and Serbia by storm. Our BRO team consists of 1,300 bright minds creating innovative ideas and products. We don’t follow formats. We shape them. We build what works, launch it fast, and make sure it hits.

We are looking for a skilled Team Lead Back-end Developer (Node.js) to join our team in Spain office.

✅Responsibilities:
✔️ Being transparent with the team about challenges, failures, and successes
✔️ Hiring and training technical personnel
✔️ Determining project requirements and developing work schedules for the team
✔️ Delegating tasks and achieving daily, weekly, and monthly goals
✔️ Liaising with team members and management to ensure projects are completed to standard
✔️ Motivating staff and creating a space where they can ask questions and voice their concerns
✔️ Delegating work and assignments to team members
✔️ Collaborating with their team to identify and fix technical problems
✔️ At least upper -Intermediate lvl of English

And for Developer part:
✔️ In-house platform development
✔️ 3rd party API integrations
✔️ Actively participate in developing new features from scratch

✅ Requirements:

✔️ At least 8+ years of experience, 3+ years in leadership
✔️ Excellent technical, diagnostic, and troubleshooting skills
✔️ Strong leadership and organizational abilities
✔️ Knowledge of JavaScript and the ECMAScript 6 standards
✔️ 3+ years of commercial experience with Node.js
✔️ 5+ years of commercial experience in web development
✔️ Commercial experience of working with DB
✔️ Commercial experience of implementing the REST and WebSockets
✔️ Experience of GIT version control system
✔️ Experience with databases MySQL
✔️ Experience with RabbitMQ
✔️ Experience with Redis

✅Nice to Have:
✔️ Experience with TypeScript

✅ We offer excellent benefits, including but not limited to:

🧑🏻‍💻 Learning and development opportunities and interesting challenging tasks;

✈️ Relocation package (tickets, staying in a hotel for 2 weeks);

🏋️‍♂️ Company fitness corner in the office for employees;

📚 Opportunity to develop language skills and partial compensation for the cost of language classes;

🎁 Birthday celebration present;

🏝 Time for proper rest and 22 working days of Annual Vacation

Join BrainRocket and rock with us! 🚀

Bold moves start here. Make yours. Apply today! 

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

Skills & Requirements:

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

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

• You have experience with Node.js

• You have experience with NoSQL databases (ideally MongoDB)

• You feel comfortable communicating in English

• You’re passionate about solving new problems

• You are always looking for the best solution

We are offering:

-Senior team;

-Regular review;

-Long-term employment;

-Challenging projects;

-Certifications;

Responsibilities:

-Code review.

-Functionality improvements to an existing solution

-Increasing system stability, testability, maintainability, and security

We are a rapidly growing startup building an advanced management and analytics platform for companies operating on fan platforms such as OnlyFans, Fansly, and others. Our platform helps businesses efficiently manage large numbers of accounts and teams, offering powerful tools for operational optimization and revenue growth. At the core of our system are powerful automation workflows, advanced data collection, and actionable insights that help our users optimize their operations.

The Role

We’re looking for an experienced backend engineer to take a leading role in this project. You’ll be responsible for designing system architecture, hands-on coding, and driving technical decisions.

What You’ll Do:

• Lead the development of the statistics subsystem, focusing on analytics and reporting.
• Design and implement microservices to automate key processes for our users.
• Build and maintain high-performance databases like ClickHouse, TimescaleDB and other specialized tools to handle large-scale data and optimize analytics flow.
• Work with large volumes of events and data streams, ensuring optimal performance and reliability.
• Collaborate with cross-functional teams to ensure seamless integration of automation and statistics features.
• Continuously optimize existing systems for performance, scalability, and reliability.

Your Expertise:

• Strong experience with Node.js, focused on backend development and building scalable, high-load systems.
• Experience with high-load databases such as ClickHouse, TimescaleDB, DynamoDB, Spark, and Cassandra, to handle and process large volumes of data efficiently.
• Expertise in real-time data processing, with a focus on streaming analytics and optimizing performance.
• Experience designing and implementing microservices, ensuring high availability, fault tolerance, and scalability.
• Strong knowledge of performance optimization for low-latency systems that can handle large-scale data processing.
• Solid understanding of cloud platforms (AWS, GCP, etc.) and containerization technologies (Docker, Kubernetes) for scalable deployments.
• Excellent problem-solving skills, with the ability to design efficient solutions for high-traffic data processing.
• Familiarity with event busses and message queues (e.g., Kafka, RabbitMQ, SQS) for real-time data processing.

About the job

Software Development Team Lead – Drive Innovation and Growth

About Exactius

Exactius partners with businesses to solve complex digital marketing challenges and drive ambitious growth. We bring executive leadership and cross-functional execution teams that strategize, execute, and deliver results. Our teams include performance marketing CMOs, campaign and CRM managers, conversion and product managers, data scientists, developers, and creative experts. Supported by proprietary technology for advanced analysis and real-time optimization, Exactius operates as an extension of your internal teams, focused on one goal—faster and more profitable growth.

About Violet Growth

Violet Growth is an AI-powered growth platform that helps businesses unlock their full potential through real-time analytics, advanced attribution models, and strategic advisory services. We

bridge the gap between data and decision-making, enabling companies to scale smarter.

The Role

We are looking for a Software Development Team Lead to oversee the technical direction of our platform while remaining hands-on in development. This role requires a strong leader and developer who can mentor a remote team while designing and delivering scalable, data-driven solutions. You will drive the development of real-time analytics features, advanced attribution

models, and seamless data integrations, ensuring technical excellence at every step.

Key Responsibilities

Leadership & Mentorship

• Lead and mentor a team of developers in a remote, agile environment.
• Foster a culture of collaboration, accountability, and continuous learning.
• Provide hands-on technical guidance and coaching.

Hands-On Development

• Designed and developed scalable web applications using Node.js, NestJS, ReactJS, Next.js, and Google Cloud Platform.
• Implement key features, optimize platform performance, and ensure reliability.
• Contribute to the codebase, setting high-quality standards for the team.

Product Development

• Work closely with the product team to develop features aligned with business objectives.
• Oversee the implementation of real-time analytics, attribution models, and AI-powered insights.
• Ensure platform scalability and maintainability.

Technical Execution

• Design, develop, and test scalable applications.
• Integrate and optimize data pipelines for real-time insights.
• Manage performance optimization efforts.

Process & Innovation

• Establish best practices for coding, testing, and documentation.
• Oversee sprint planning, code reviews, and CI/CD workflows.
• Research emerging technologies and contribute to architectural decisions.

What You Bring

• 5+ years of full-stack development experience.
• Strong expertise in front-end and back-end development.
• Proficiency in relational databases, CI/CD, and agile methodologies.
• Leadership experience, mentoring developers and driving best practices.
• Experience working closely with design teams and tools like Figma.
• Exceptional verbal English communication skills.
• Comfort working in a remote, fast-paced environment.

What We Offer

• A collaborative and innovative work environment.
• The opportunity to work on cutting-edge AI-powered growth technologies.
• Career development and leadership opportunities.
• A flexible, remote work setup supporting work-life balance.

Are you ready to lead and innovate? You can apply now or share this opportunity with someone who might be a great fit.

#Hiring #SoftwareDevelopment #TeamLead #AI #GrowthTech #RemoteWork

We are seeking a skilled Senior Node.js Developer who will join our team in the office in Warsaw.

✅ Requirements:

✔️Strong knowledge of JavaScript and the ECMAScript 6 standards

✔️3+ years of commercial experience with Node.js and Nest.js

✔️5+ years of commercial experience in web development

✔️Commercial experience of working with high-load SQL or NoSQL databases

✔️Commercial experience of implementing REST, GraphQL, and WebSockets

✔️Understanding of the TDD principles and experience of writing tests

✔️Understanding of microservice architecture principles

✔️Experience of GIT version control system

✔️Experience with RabbitMQ

✔️Experience with Redis

✔️Experience with databases: MongoDB, MySQL

✔️At least an Intermediate level of English.

✅ Will be a plus:

✔️2+ years of hands-on experience developing CI/CD/Micro Services architecture/Containers

✔️Experience with Kubernetes

✔️Experience with Nats

✔️Experience with TypeScript.

✅ Duties and opportunities:

✔️In-house platform development

✔️3rd party API integrations

✔️Actively participate in developing new features from scratch.

✅ We offer excellent benefits, including but not limited to:

🚀 Career growth opportunities in an international and dynamic environment

📚 Opportunity to develop language skills with partial compensation for language courses

🎁 Special gifts for birthdays, weddings, and newborns

🏝️ 20 working days of paid annual vacation, plus paid sick leaves

🍲 Office snacks and refreshments

🏋️‍♂️ Sports package to support a healthy lifestyle

🩺 Comprehensive medical insurance for you and your partner

📍 Comfortable office with great facilities in a prime location

🎉 Exciting corporate events, team-building activities, and international company parties.

Valencia, Spain

BrainRocket is a global company creating end-to-end tech products for clients across Fintech, iGaming, and Marketing. ‍Young, ambitious, and unstoppable, we've already taken Cyprus, Malta, Portugal, Poland, and Serbia by storm. Our BRO team consists of 1,300 bright minds creating innovative ideas and products. We don’t follow formats. We shape them. We build what works, launch it fast, and make sure it hits.

❗️IMPORTANT: This position is office based for our office in Valencia, Spain.

❗️We can provide relocation assistance if you're outside of the city or country.

We are looking for a skilled Senior Node.js Developer with relocation to Spain.

✅ Requirements:
✔️Strong knowledge of JavaScript and the ECMAScript 6 standards
✔️4+ years of commercial experience with Node.js and Nest.js
✔️5+ years of commercial experience in web development
✔️Commercial experience of working with high loaded SQL or NO SQL databases
✔️Commercial experience of implementing the REST, GraphQL and WebSockets
✔️Understanding of the TDD principles and experience of writing tests
✔️Understanding of microservice architecture principles
✔️Experience of GIT version control system
✔️Experience with RabbitMQ
✔️Experience with Redis
✔️Experience with databases MongoDB, MySQL
✔️At least Intermediate lvl of English

✅ Will be a plus: 
✔️2+ years of hands-on experience developing over CI/CD/Micro Services architecture/Containers
✔️Experience with Kubernetes
✔️Experience with Nats
✔️Experience with TypeScript

✅ Duties and opportunities:

✔️In-house platform development
✔️3rd party API integrations
✔️Actively participate in developing new features from scratch

✅ We offer excellent benefits, including but not limited to:

🧑🏻‍💻 Learning and development opportunities and interesting challenging tasks;

✈️ Relocation package (tickets, staying in a hotel for 2 weeks and visa relocation support for our employees and their family members);

📚 Opportunity to develop language skills and partial compensation for the cost of language classes;

🏥 Private medical coverage;

🎁 Birthday celebration present;

🏝 Annual Vacation and paid sick days;

✅ Competitive remuneration level with annual review;

🤝 Teambuilding activities.

Bold moves start here. Make yours. Apply today! 

1. About Us

We’re a team of professional software developers. Our next mission: build a Shopify-embedded CRM that surfaces orders, customers, and live dashboards - all as a built-in native Shopify experience.

2. Why This Role Matters

Our users juggle disjointed tools. You’ll architect and deliver the central nervous system that unifies order data, conversations, and analytics - turning scattered touch-points into a single source of truth.

3. What You'll Own

- Architecture & Data. Design the PostgreSQL schema and Drizzle ORM models powering multi-tenant data.

- Integration. Figure out leverage points and how to integrate with 3rd party systems.

- App Framework. Ship performant React Router views inside the Shopify App Bridge.

- Core Features. Build customer timelines, order detail pages, and a metrics dashboard with live charts.

- CI/CD pipeline. Automated Acceptance tests.

- Technical Leadership. Mentor devs, run lean RFCs, and choose the right trade-offs for scale & security.

4. Tech Stack You’ll Thrive In

- Shopify App Platform (App Bridge, OAuth, Webhooks, GraphQL Admin API)

- React + Typescript with React Router

- Drizzle ORM on PostgreSQL 15

- Vite + Vitest / Playwright for DX & testing

5. You’re a Great Fit If You

- Have 5+ yrs shipping production-grade React/Node systems, with at least one Shopify app in market.

- Speak SQL natively and can reason about indexes, migrations, and isolation levels.

- Balance product sense with technical rigor - you ask “why” before “how”.

- Write clear, kind English

- You use Claude Code or Cursor daily.

- You do not generate me a boring-a** message with default ChatGPT style and instead actually just just send me a simple checklist of why I should hire you

Appexoft is looking for a motivated Trainee or Junior Node.js Developer to join our team in Lviv (office format). We would love to hear from you if you are eager to grow in backend development and work with modern technologies.
 

Required Technologies:

• Node.js, Express.js / Nest.js
• JavaScript (ES6+) / TypeScript
• SQL (PostgreSQL, MySQL), NoSQL (MongoDB, Redis)
• REST API, GraphQL, WebSockets
• Git (GitHub/GitLab), Docker (preferred)
• Postman for API testing

Nice to Have:

• Understanding of OOP, SOLID principles, and design patterns
• Experience with testing frameworks (Jest, Mocha, Chai)

Requirements:

• English level: B1 or higher
• Strong motivation to learn and develop in backend engineering

We Offer:

• Interesting and challenging projects
• Vast opportunities for professional development
• Competitive salary
• Friendly team of professionals
• Comfortable working environment

Про компанію Appexoft

Appexoft is Software Development Company that provides a full range of top-quality IT services. Our mission is to develop first-class applications and Websites to provide our clients with the best solutions for maximizing their profits and converting their ideas into reality.

Про компанію Appexoft

Appexoft is Software Development Company that provides a full range of top-quality IT services. Our mission is to develop first-class applications and Websites to provide our clients with the best solutions for maximizing their profits and converting their ideas into reality.

Our Tech Stack

Please apply only if you have strong experience with this stack – we’re not considering non-Node environments at this time.

• Backend / Platform:
  Node.js / NestJS
  PostgreSQL, Redis, RabbitMQ
  Supabase Auth SDK (used internally, replaceable later)
  Kong API Gateway for token validation, routing, rate limiting
  AWS ECS, RDS, S3, SES, CloudWatch, Secrets Manager, etc.
  GitHub Actions (CI/CD)
  Cloudflare (DNS/CDN)
• API Layer:
  gRPC for internal service communication
  GraphQL via Apollo Server (central BFF handler behind Kong Gateway)
  REST for third-party integrations (e.g. CRM sync)
• Frontend (not your focus, just to understand context):
  React, MobX
  Ant Design, SCSS Modules

Our roadmap includes modules for ZK-powered trust verification, blockchain-based data proof, and AI-driven analytics, scoring, and partner insights. You may be part of these initiatives as the platform scales.

What You’ll Do

As the Senior Backend Engineer, you’ll be helping shape the architecture (in close collaboration with the Technical Lead and hands-on CTO) and building the platform from the ground up.

You’ll be responsible for implementing microservices, building integrations, and managing backend logic that powers our GraphQL API and integrations with third-party platforms. You will:

• Design and implement scalable gRPC microservices using NestJS
• Own PostgreSQL schemas, gRPC proto contracts, and service definitions
• Integrate with external platforms like Salesforce, ConnectWise, Kaseya, and others
• Implement secure authentication flows (login, magic links, password reset, refresh)
• Handle JWT validation, sessions, and RBAC logic via Kong and auth-service
• Write structured logs, tracing, and health endpoints
• Ship clean, production-ready code deployed via ECS + GitHub Actions
• Configure and manage observability and security tooling (e.g. Datadog or custom setup with Prometheus + Grafana + Loki + Tempo + Fluent Bit) across services

We’re not looking for someone to just “ship tasks”. We want someone who questions requirements, brings better ideas, and treats the backend like their product.

We’re not looking for a unicorn, the requirements are a guide to the kind of experience that would help you succeed in this role.

Ideal Qualifications

• 7+ years of overall software engineering experience
• 5+ years working with Node.js + NestJS + TypeScript
• Strong expertise with gRPC and microservice architecture patterns
• Solid experience with AWS core services and Docker-based containerisation
• Solid experience designing and managing GraphQL schemas
• Proficiency with OAuth2, session management, and secure API design
• Experience with Supabase Auth or similar (Keycloak, ORY, Firebase)
• Experience with CRM integrations like Salesforce, ConnectWise, Kaseya
• Experience working with compliance frameworks like ISO 27001, SOC2, or GDPR
• Understanding of web security threats and mitigation strategies (XSS, CSRF, SSRF, JWT handling, cookie protection, etc)
• Experience designing service boundaries, data contracts, and owning production systems end-to-end

Nice to Have

• Experience developing in Python or Go when needed
• Familiarity with blockchain or verifiable data architectures (ZK)
• Interest in AI pipelines, scoring systems, or ML integration
• Ability to collaborate with frontend developers; familiarity with React

What We Offer

• Ability to build greenfield systems with no legacy blockers or micromanagement
• Deep ownership of architecture, integrations, and backend direction
• Space to focus on engineering with care about the quality, stability, and best practices
• Minimal bureaucracy, fast decisions, and direct collaboration with the founding team
• Technical growth opportunities as we expand into blockchain, ZK, and AI
• We aim to offer compensation that’s both competitive and aligned with your experience, so you feel well rewarded for the impact you bring
• In case of successful long-term collaboration, we’re open to supporting relocation to Australia for you and your family.

Note: If you don’t have an advanced level of English (equivalent to IELTS 7.0 or above), you should be able to communicate confidently in Ukrainian (Russian-speaking Ukrainians are also welcome)

FAVBET Tech develops software that is used by millions of players around the world for the international company FAVBET Entertainment.
We develop innovations in the field of gambling and betting through a complex multi-component platform which is capable to withstand enormous loads and provide a unique experience for players.
FAVBET Tech does not organize and conduct gambling on its platform. Its main focus is software development.

Main areas of work:

• Betting/Gambling Platform Software Development — software development that is easy to use and personalized for each customer.
• Highload Development — development of highly loaded services and systems.
• CRM System Development — development of a number of services to ensure a high level of customer service, effective engagement of new customers and retention of existing ones.
• Big Data — development of complex systems for processing and analysis of big data.
• Cloud Services — we use cloud technologies for scaling and business efficiency.

Requirements:

• Proficiency in Node.js, with a strong understanding of core principles, performance optimization, testing, pipelines, deploying, monitoring, scaling, etc.
• Experience with PostgreSQL, particularly in performance optimization.
• Ability to configure and manage message brokers such as RabbitMQ.
• Familiarity with caching mechanisms like Redis.
• Competence in writing and maintaining unit, integration, and E2E tests.
• Solid understanding of software architecture design, including UML and design patterns.
• Knowledge of RestAPI and OpenAPI specifications.
• Experience with Git flow for version control.
• Working experience 
   At least 5+ years of hands-on experience with Node.js.
• Minimum 3 years of experience working with relational databases (PostgreSQL).
• At least 3 years of experience in test implementation (unit, integration, E2E).
• Demonstrated experience in developing new features and enhancing existing services.
• Experience in handling complex problems and providing effective solutions.
• Consistent improvement of code organization and application design.
• Management skills (if needed) 
• Potential for team leadership and management responsibilities.
• Ability to mentor and guide team members.
• Strong organizational skills and the ability to manage multiple tasks effectively.
• Experience or aptitude in making architectural decisions and leading development initiatives.
• Domain experience / Preferable companies (FinTech, E-commerce, gambling etc.) 
      

  Experience in FinTech, E-commerce, or gambling sectors is preferred.

  Proven experience in performance tuning and handling high-load systems.

  Background in working with microservices architecture and optimizing their performance.

Additional requirements (foreign language) 
    

  Strong command of English, particularly for reading and writing technical documentation (Upper-Intermediate level).

  Ability to maintain emotional well-being and manage stress effectively.

  Proactive approach to learning and staying updated with the latest technologies and best practices.

  Capability to create and maintain clear and concise documentation in English.

•    Express.js
•    Nest.js (good to have)
•    Typescript  
•    Unit/Integration/E2E testing
•    Jest
•    CucumberJS
•    RabbitMQ
•    Redis
•    Software Architecture Design/UML/Design Patterns
•    PlantUML (good to have)
•    RestAPI
•    OpenAPI Spec
•    Postgresql
•    Sequelize
•    Prisma (good to have)
•    Kubernetes
•    Understanding Go code (would be a plus)
•    Solid understanding OOP/Solid/Quality Gates 

Responsibilities:

•  Development of new features and system implementations: Creating new functionalities, integrating new systems, and ensuring compliance with product requirements.
• Refactoring existing code: Optimizing and improving existing code according to established guidelines, ensuring system stability and performance.
• Optimizing PostgreSQL performance: Configuring, optimizing, and monitoring the PostgreSQL database to ensure high performance and reliability.
• Setting up and configuring message brokers: Working with RabbitMQ to ensure efficient message processing, resolving issues with queues and retries.
• Testing and quality assurance: Writing and maintaining integration, unit, and E2E tests, ensuring high test coverage, controlling code quality, and participating in CI/CD processes. 

We  offer:

• 30 days off per year (vacation and sick days) — we value rest and recreation. We also comply with the national holidays.
• Medical insurance for employees and the possibility of training employees at the expense of the company and gym membership.
• Remote work; after Ukraine wins the war — our own modern lofty office with spacious workplace, and brand-new work equipment (near Pochaina metro station).
• Flexible work schedule — we expect a full-time commitment but do not track your working hours.
• Flat hierarchy without micromanagement — our doors are open, and all teammates are approachable.

During the war, the company actively supports the Ministry of Digital Transformation of Ukraine in the initiative to deploy an IT army and has already organized its own cyber warfare unit, which makes a crushing blow to the enemy’s IT infrastructure 24/7, coordinates with other cyber volunteers and plans offensive actions on its IT front line.

A fast-growing fintech startup building cutting-edge blockchain solutions looking for an experienced Backend Developer( Node.js Developer (NestJS) | Fintech, Blockchain, Highload) to join our remote team.. We work at the intersection of finance, crypto, and highload systems

Tech stack we use:

Node.js, NestJS, Kafka, RabbitMQ
MongoDB, PostgreSQL, Redis
Docker, Kubernetes, Web3
Microservices, CI/CD

Requirements:

• 2+ years of commercial experience with Node.js and NestJS
• Strong understanding of microservice architecture principles
• Hands-on experience with Kafka or RabbitMQ
• Experience working with databases: MongoDB, PostgreSQL, Redis
• Solid background in fintech, blockchain, or highload projects (ideally more than one)
• Good grasp of asynchronous processes and ability to write async code
• Experience building REST APIs and working with WebSocket/Socket.IO (WS/WSS)
• Confident Git and Gitflow user
• Ability to read and work with existing codebase
• Skilled in logging and debugging

Nice to have:

• Experience with TypeScript
• Understanding of Docker and CI/CD
• Exposure to Web3 integrations

 What we offer:

• Fully remote work
• Flexible working hours
• Direct access to C-levels — your ideas matter here
• Open-minded team always ready to test new tech

• Gifts on special occasions