Jobs Node.js

About the Role

Are you a Senior Backend Engineer who thrives on building high-performance architectures and scaling complex systems from scratch? We are looking for a Node.js/Nest.js expert to spearhead the development of our core, in-house platform, driving innovation across high-load environments. If you want to own your code, work with cutting-edge microservices, and make a tangible impact on a rapidly growing ecosystem, this is your next big move.

About the Client

Our partner is a tech company building product engineering across Fintech, iGaming, and Marketing. They turn innovative ideas into high-performing engines and launch them at scale. As their exclusive recruitment partner, Lionhires manages their full-cycle talent acquisition.

What You Will Do

• Architect and develop the core in-house platform, taking new, high-impact features from initial concept to production scale.
• Design and implement robust microservices and build seamless integrations with various third-party APIs.
• Optimize database performance for high-load systems, working extensively with both SQL and NoSQL solutions.
• Champion code quality by applying TDD (Test-Driven Development) principles and writing comprehensive automated tests.

• Collaborate cross-functionally to ensure scalability, reliability, and high availability across all backend services.

   

What You Bring

• Deep Backend Expertise: 5+ years of commercial web development experience, with a heavy focus on Node.js and Nest.js.
• Modern JavaScript Proficiency: Strong mastery of modern JavaScript and ECMAScript 6+ standards (TypeScript is a major plus).
• High-Load Database Management: Proven experience handling high-load database environments, specifically using MongoDB and MySQL.
• Advanced Communication Protocols: Practical experience implementing RESTful APIs, GraphQL, and WebSockets.
• Message Brokers & Caching: Hands-on experience working with RabbitMQ and Redis (experience with Nats is a plus).
• Architectural Mastery: Solid understanding of microservice architecture and version control via Git.
• Quality & Testing Mindset: Strong grasp of TDD principles and a habit of writing clean, testable code.

• Language Skills: Professional working proficiency in English (Intermediate level or higher).

   

Nice-to-Haves:

• 2+ years of hands-on experience working with CI/CD pipelines, containerization, and microservices.

• Direct experience with Kubernetes.

   

What's in It for You

• Financial Growth: Highly competitive salary with structured annual compensation reviews.
• Full Relocation Support: A complete relocation package including covered flight tickets and a 2-week hotel stay upon arrival.
• Legal Peace of Mind: Official EU/Spain employment contract, including registration and support for your family members.
• Work-Life Balance: 23 working days of paid annual vacation to ensure you rest and recharge properly.
• Professional Development: Continuous learning opportunities, challenging tasks, and language development support with partial class compensation.
• Culture & Community: Vibrant team-building activities, custom birthday gifts, and access to our upcoming Social Club featuring over 50 events per year.

We are looking for a Lead Backend Developer to architect and own the backend infrastructure of our fintech platform. You will design scalable microservices, manage critical data flows, and ensure system reliability at scale. Work directly with product, design, and business stakeholders to translate requirements into robust backend systems. 

This is a hybrid role, and we are currently considering candidates based in Lviv (Ukraine). 

Fully remote work is not an option for this position.

What You Will Do
Backend Architecture & Design

• Own the backend architecture end-to-end across microservices.
• Design and implement Node.js / Express services handling 20M+ transactions monthly.
• Architect PostgreSQL schemas for reliability and performance at scale.
• Define API contracts (GraphQL, REST) that support frontend and partner integrations.
• Make critical decisions on data consistency, caching, and async patterns.

Microservices & System Design

• Build and maintain multiple Node.js / Express microservices with clear ownership boundaries.
• Implement webhook-driven workflows and event-driven architecture.
• Design and implement real-time data synchronization pipelines.
• Manage message queues (RabbitMQ) for async operations and inter-service communication.
• Ensure row-level security (RLS) and multi-tenant data isolation at the database layer.

Data & Performance

• Design and optimize PostgreSQL schemas using Prisma ORM.
• Write complex queries, manage indexes, and ensure query performance.
• Implement caching strategies and data consistency patterns.
• Build audit trails and changelog tracking for compliance and debugging.
• Handle sensitive data (KYC, AML, financial records) with security-first approach.

Integration & Third-Party Services

• Integrate with external services (KYC providers, document verification, acquiring networks).
• Design and maintain API integrations with payment processors and clearing centers.
• Build robust error handling and retry logic for critical integrations.
• Document APIs and maintain SDK/integration guides for partners.
Communication & Leadership

• Work directly with product managers and stakeholders to clarify backend requirements.
• Proactively flag technical risks, propose solutions, and keep stakeholders informed.
• Give technical feedback on product feasibility and scalability implications.
• Lead backend code reviews with focus on quality, performance, and knowledge sharing.
• Mentor junior developers and foster backend engineering best practices.

What We Are Looking For
Core Requirements:

• 5–7 years of production experience in Node.js backend development.
• Strong TypeScript across the entire stack (no JavaScript-only experience).
• PostgreSQL expertise: schema design, optimization, transactions, advanced queries.
• Prisma ORM or similar ORMs and hands-on experience with relational databases.
• GraphQL schema design and resolver implementation (REST a plus).
• Microservices architecture: designing boundaries, managing state, async communication.
• RabbitMQ or similar message brokers; event-driven architecture patterns.
• Experience with fintech, payments, or regulated financial products.
• Strong communication skills and comfort working directly with non-technical stakeholders.

Nice to Have:

• Distributed systems experience (eventual consistency, saga patterns, consensus).
• gRPC for service-to-service communication.
• Experience scaling to 100K+ users and handling high transaction volume.
• Background in AML/KYC compliance or financial data handling.
• DevOps sensibility: monitoring, logging, deployment pipelines.
• Experience mentoring backend teams.

Tech Stack
Core: Node.js, Express, TypeScript, PostgreSQL, Prisma ORM, GraphQL, RabbitMQ, gRPC
Supporting: REST APIs, Webhooks, Real-time data sync, Multi-tenant architecture, Audit logging

What We Offer

• Full backend ownership and architectural control.
• Work on systems handling millions of transactions and 100K+ merchants.
• Direct access to product and business stakeholders.
• Modern microservices stack with no legacy debt.
• AI-friendly engineering culture—we embrace tools that make you more effective.
• Deep fintech learning: multi-partner networks, compliance, payment flows.
• Competitive compensation and benefits package.

We are looking for a Lead Backend Developer to architect and own the backend infrastructure of our fintech platform. You will design scalable microservices, manage critical data flows, and ensure system reliability at scale. Work directly with product, design, and business stakeholders to translate requirements into robust backend systems. 

This is a hybrid role, and we are currently considering candidates based in Lviv (Ukraine). 

Fully remote work is not an option for this position.

What You Will Do
Backend Architecture & Design

• Own the backend architecture end-to-end across microservices.
• Design and implement Node.js / Express services handling 20M+ transactions monthly.
• Architect PostgreSQL schemas for reliability and performance at scale.
• Define API contracts (GraphQL, REST) that support frontend and partner integrations.
• Make critical decisions on data consistency, caching, and async patterns.

Microservices & System Design

• Build and maintain multiple Node.js / Express microservices with clear ownership boundaries.
• Implement webhook-driven workflows and event-driven architecture.
• Design and implement real-time data synchronization pipelines.
• Manage message queues (RabbitMQ) for async operations and inter-service communication.
• Ensure row-level security (RLS) and multi-tenant data isolation at the database layer.

Data & Performance

• Design and optimize PostgreSQL schemas using Prisma ORM.
• Write complex queries, manage indexes, and ensure query performance.
• Implement caching strategies and data consistency patterns.
• Build audit trails and changelog tracking for compliance and debugging.
• Handle sensitive data (KYC, AML, financial records) with security-first approach.

Integration & Third-Party Services

• Integrate with external services (KYC providers, document verification, acquiring networks).
• Design and maintain API integrations with payment processors and clearing centers.
• Build robust error handling and retry logic for critical integrations.
• Document APIs and maintain SDK/integration guides for partners.
Communication & Leadership

• Work directly with product managers and stakeholders to clarify backend requirements.
• Proactively flag technical risks, propose solutions, and keep stakeholders informed.
• Give technical feedback on product feasibility and scalability implications.
• Lead backend code reviews with focus on quality, performance, and knowledge sharing.
• Mentor junior developers and foster backend engineering best practices.

What We Are Looking For
Core Requirements:

• 5–7 years of production experience in Node.js backend development.
• Strong TypeScript across the entire stack (no JavaScript-only experience).
• PostgreSQL expertise: schema design, optimization, transactions, advanced queries.
• Prisma ORM or similar ORMs and hands-on experience with relational databases.
• GraphQL schema design and resolver implementation (REST a plus).
• Microservices architecture: designing boundaries, managing state, async communication.
• RabbitMQ or similar message brokers; event-driven architecture patterns.
• Experience with fintech, payments, or regulated financial products.
• Strong communication skills and comfort working directly with non-technical stakeholders.

Nice to Have:

• Distributed systems experience (eventual consistency, saga patterns, consensus).
• gRPC for service-to-service communication.
• Experience scaling to 100K+ users and handling high transaction volume.
• Background in AML/KYC compliance or financial data handling.
• DevOps sensibility: monitoring, logging, deployment pipelines.
• Experience mentoring backend teams.

Tech Stack
Core: Node.js, Express, TypeScript, PostgreSQL, Prisma ORM, GraphQL, RabbitMQ, gRPC
Supporting: REST APIs, Webhooks, Real-time data sync, Multi-tenant architecture, Audit logging

What We Offer

• Full backend ownership and architectural control.
• Work on systems handling millions of transactions and 100K+ merchants.
• Direct access to product and business stakeholders.
• Modern microservices stack with no legacy debt.
• AI-friendly engineering culture—we embrace tools that make you more effective.
• Deep fintech learning: multi-partner networks, compliance, payment flows.
• Competitive compensation and benefits package.

  Hi! We are looking for a Node.js Backend Developer (NestJS) to join our pack at SharksCode 🦈💙
SharksCode is a Ukrainian IT company that develops high-tech software solutions and scalable B2B platforms.
  We are looking for a Node.js Backend Developer who will work on building scalable backend services and integrations within a distributed architecture. In this role, you will participate in designing and developing platform services, integrating external systems, and contributing to technical decisions that impact the overall product architecture.
 

We expect that you:

• Have 5+ years of commercial backend development experience with Node.js.
• Have 3+ years of commercial experience with TypeScript.
• Have 3+ years of experience with NestJS or be ready to quickly adopt it.
• Have hands-on experience with relational and NoSQL databases, including PostgreSQL, MySQL, and MongoDB.
• Have experience designing and developing microservice-based distributed systems.
• Have hands-on experience with RabbitMQ, Kafka, and event-driven architecture.
• Have experience with Redis for caching, Pub/Sub, or distributed synchronization.
• Have substantial experience writing and maintaining unit and integration tests using Jest.
• Have strong knowledge of software architecture, design patterns, SOLID principles, and engineering best practices.
• Have experience with Docker, Kubernetes, CI/CD pipelines, and communication technologies such as WebSocket or gRPC.
   

Your future responsibilities:

• Design and develop backend services and platform functionality.
• Build and maintain integrations with third-party technical services.
• Develop and maintain microservices.
• Participate in technical discussions and architecture decisions related to platform development.
• Ensure high code quality and follow engineering best practices.
• Share knowledge and contribute to the development culture within the team.
   

Nice to have:

• Experience building high-load, highly available, or real-time systems.
• Experience with observability and monitoring tools (Prometheus, Grafana, OpenTelemetry, ELK, etc.).
• Experience with cloud platforms such as AWS, GCP, or Azure.
   

Interview stages:

🤝 Interview with Recruiter.
🧠 Technical Interview.
💙 Offer.
 

We offer:

🌴 24 paid vacation days, 14 sick days, and 5 days off.
⏰ Flexible start of the working day — from 9:00 to 11:00.
🏥 Medical insurance.
💰 Bonuses and performance-based rewards.
🐶 Office in the center of Kyiv — pets are welcome, we are pet-friendly.
💆 Lounge area in the office to recharge during the day.
🎾 Padel tennis, football, and training at the polygon for those who enjoy active leisure.
📚 Learning compensation, internal meetups and workshops, as well as access to the corporate LMS with courses.
🎁 Corporate currency that can be exchanged for merch, gifts, or additional benefits.

  Hi! We are looking for a Node.js Backend Developer (NestJS) to join our pack at SharksCode 🦈💙
SharksCode is a Ukrainian IT company that develops high-tech software solutions and scalable B2B platforms.
  We are looking for a Node.js Backend Developer who will work on building scalable backend services and integrations within a distributed architecture. In this role, you will participate in designing and developing platform services, integrating external systems, and contributing to technical decisions that impact the overall product architecture.
 

We expect that you:

• Have 5+ years of commercial backend development experience with Node.js.
• Have 3+ years of commercial experience with TypeScript.
• Have 3+ years of experience with NestJS or be ready to quickly adopt it.
• Have hands-on experience with relational and NoSQL databases, including PostgreSQL, MySQL, and MongoDB.
• Have experience designing and developing microservice-based distributed systems.
• Have hands-on experience with RabbitMQ, Kafka, and event-driven architecture.
• Have experience with Redis for caching, Pub/Sub, or distributed synchronization.
• Have substantial experience writing and maintaining unit and integration tests using Jest.
• Have strong knowledge of software architecture, design patterns, SOLID principles, and engineering best practices.
• Have experience with Docker, Kubernetes, CI/CD pipelines, and communication technologies such as WebSocket or gRPC.
   

Your future responsibilities:

• Design and develop backend services and platform functionality.
• Build and maintain integrations with third-party technical services.
• Develop and maintain microservices.
• Participate in technical discussions and architecture decisions related to platform development.
• Ensure high code quality and follow engineering best practices.
• Share knowledge and contribute to the development culture within the team.
   

Nice to have:

• Experience building high-load, highly available, or real-time systems.
• Experience with observability and monitoring tools (Prometheus, Grafana, OpenTelemetry, ELK, etc.).
• Experience with cloud platforms such as AWS, GCP, or Azure.
   

Interview stages:

🤝 Interview with Recruiter.
🧠 Technical Interview.
💙 Offer.
 

We offer:

🌴 24 paid vacation days, 14 sick days, and 5 days off.
⏰ Flexible start of the working day — from 9:00 to 11:00.
🏥 Medical insurance.
💰 Bonuses and performance-based rewards.
🐶 Office in the center of Kyiv — pets are welcome, we are pet-friendly.
💆 Lounge area in the office to recharge during the day.
🎾 Padel tennis, football, and training at the polygon for those who enjoy active leisure.
📚 Learning compensation, internal meetups and workshops, as well as access to the corporate LMS with courses.
🎁 Corporate currency that can be exchanged for merch, gifts, or additional benefits.

  Hi! We are looking for a Node.js Backend Developer (NestJS) to join our pack at SharksCode 🦈💙
SharksCode is a Ukrainian IT company that develops high-tech software solutions and scalable B2B platforms.
  We are looking for a Node.js Backend Developer who will work on building scalable backend services and integrations within a distributed architecture. In this role, you will participate in designing and developing platform services, integrating external systems, and contributing to technical decisions that impact the overall product architecture.
 

We expect that you:

• Have 5+ years of commercial backend development experience with Node.js.
• Have 3+ years of commercial experience with TypeScript.
• Have 3+ years of experience with NestJS or be ready to quickly adopt it.
• Have hands-on experience with relational and NoSQL databases, including PostgreSQL, MySQL, and MongoDB.
• Have experience designing and developing microservice-based distributed systems.
• Have hands-on experience with RabbitMQ, Kafka, and event-driven architecture.
• Have experience with Redis for caching, Pub/Sub, or distributed synchronization.
• Have substantial experience writing and maintaining unit and integration tests using Jest.
• Have strong knowledge of software architecture, design patterns, SOLID principles, and engineering best practices.
• Have experience with Docker, Kubernetes, CI/CD pipelines, and communication technologies such as WebSocket or gRPC.
   

Your future responsibilities:

• Design and develop backend services and platform functionality.
• Build and maintain integrations with third-party technical services.
• Develop and maintain microservices.
• Participate in technical discussions and architecture decisions related to platform development.
• Ensure high code quality and follow engineering best practices.
• Share knowledge and contribute to the development culture within the team.
   

Nice to have:

• Experience building high-load, highly available, or real-time systems.
• Experience with observability and monitoring tools (Prometheus, Grafana, OpenTelemetry, ELK, etc.).
• Experience with cloud platforms such as AWS, GCP, or Azure.
   

Interview stages:

🤝 Interview with Recruiter.
🧠 Technical Interview.
💙 Offer.
 

We offer:

🌴 24 paid vacation days, 14 sick days, and 5 days off.
⏰ Flexible start of the working day — from 9:00 to 11:00.
🏥 Medical insurance.
💰 Bonuses and performance-based rewards.
🐶 Office in the center of Kyiv — pets are welcome, we are pet-friendly.
💆 Lounge area in the office to recharge during the day.
🎾 Padel tennis, football, and training at the polygon for those who enjoy active leisure.
📚 Learning compensation, internal meetups and workshops, as well as access to the corporate LMS with courses.
🎁 Corporate currency that can be exchanged for merch, gifts, or additional benefits.

🚀 AIMPROSOFT is looking for a Senior Full Stack Developer (React + Node.js)! 

Aimprosoft is looking for a Senior Full Stack Developer on a contract basis ( ≈ 6-12 months) for an international project in the Utilities domain. 

You'll become part of an engineering team building the next generation of products that help utility companies plan, manage, and optimize field operations through workflow automation, cloud technologies, and AI-powered capabilities. 

🎯About the project & role: 

Our client is building an integrated platform for work planning and operational management in the utilities industry. 

The product ecosystem includes solutions for: 

• Work planning and scheduling 
• Street works permit management 
• Digital Twin for water networks 
• Operational Control Room dashboards 
• Workflow automation 
• AI-powered planning and forecasting 

The technology stack is primarily React, Node.js, Nest.js, PostgreSQL, and AWS, with some services built using Java Spring, Angular, and Serverless technologies. 

As a Senior Full Stack Developer, you'll take ownership of features from concept to production, contribute to architectural decisions, and work closely with experienced engineers and the client's UK team. 

Your responsibilities will include: 

• Designing, developing, and maintaining modern React applications 
• Building scalable backend services and REST APIs using Node.js and Nest.js 
• Delivering end-to-end product features across the full stack 
• Designing and optimizing PostgreSQL databases and queries 
• Deploying and supporting cloud-native applications on AWS 
• Participating in architecture discussions, code reviews, testing, and release activities 
• Troubleshooting production issues and improving platform reliability 
• Collaborating with product managers, designers, and engineering teams 
• Investigating technical challenges independently and driving solutions with minimal supervision 
• Leveraging modern AI development tools such as Cursor and Claude Code to improve productivity and accelerate development 

🔥What We Need From You: 

• 7+ years of commercial experience with Node.js, with a strong backend focus 
• Solid commercial experience with React 
• Upper-Intermediate+ (B2+) English level for daily collaboration with the client's UK-based team 
• Strong experience building REST APIs and backend services 
• Hands-on experience with Nest.js 
• Strong knowledge of PostgreSQL 
• Experience working with AWS services, including Lambda, ECS, API Gateway, and related cloud infrastructure 
• Good understanding of testing practices, Git workflows, and CI/CD pipelines 
• Strong analytical and problem-solving skills 

📌Nice to have: 

• Solid commercial experience with TypeScript 
• Experience with Docker and containerization 
• Infrastructure as Code (Terraform or CloudFormation) 
• Experience building SaaS platforms or highly available production systems 
• Knowledge of monitoring, observability, and cloud security best practices 
• Experience with Feathers.js 
• Experience with Playwright or Selenium for automated testing 
• Experience integrating third-party services such as Stripe, OpenSearch, or Elasticsearch 
• Experience working in large cross-functional engineering teams 
• Familiarity with Java Spring applications 

💼What We Offer: 

• Official military deferment (reservation); 
• A competitive salary that appreciates your skills and experience; 
• Opportunity to join a strategically important pilot team with long-term project prospects 
• Work on modern cloud-native products that deliver real-world impact 
• Exposure to AI-powered development practices and enterprise-scale engineering 
• Open environment where your ideas, technical expertise are valued 

Why this role exists:

We're looking for a strong individual contributor who owns complex backend features end-to-end — from technical design through production delivery. You'll work independently on challenging problems, write high-quality code at scale, and raise the bar for the team by mentoring less experienced engineers and maintaining engineering standards through thorough code reviews.

What you’ll drive:

Software Architecture and Backend Development

• Design and implement scalable, resilient backend services and APIs.
• Write, test, and debug complex code across new and existing application.
• Own features end-to-end: from understanding requirements, through implementation, to production monitoring.
• Identify and resolve complex technical problems, including performance bottlenecks and architectural debt.
• Maintain comprehensive technical documentation for systems you build.

Collaboration & Mentorship

• Mentor junior and mid-level engineers through pairing, knowledge sharing, and day-to-day guidance.
• Conduct thorough code reviews to ensure quality, security, and adherence to best practices.
• Collaborate with cross-functional teams (product, design, operations) to clarify requirements and align on technical approach.
• Proactively communicate technical trade-offs and progress within the team.

What makes you a GR8 fit:

Must-have

• 5+ years of hands-on backend engineering experience with a strong track record of delivering complex systems.
• Upper-intermediate or higher level of English.
• Understanding of system design: microservices, event-driven architecture, resilient patterns, delivery guarantees, CAP theorem.
• Database knowledge: relational and non-relational databases, SQL optimization, indexing, normalization/denormalization, ACID properties, transaction isolation.
• Working knowledge of Docker, Kubernetes basics, CI/CD pipelines, and Git workflows.
• Strong problem-solving skills: ability to break down ambiguous problems, make pragmatic decisions, and communicate reasoning clearly.
• Advanced proficiency in Node.js and TypeScript, including runtime internals, event loop, async programming, and core modules.
• Advanced TypeScript: strict typing, generics, decorators, utility types, and metaprogramming patterns used in NestJS. 
• Proficiency in designing and implementing scalable RESTful APIs and microservices using NestJS (modules, providers, guards, interceptors, microservices transport, Swagger).
• Event-driven architecture: Kafka for async messaging, BullMQ for background job processing.
• Cloud & infrastructure: AWS SDK (S3, Bedrock), Docker/Docker Compose, Prometheus metrics, GitLab CI/CD

Nice-to-have

• Experience with Go or .NET.
• Experience with Strapi CMS or similar headless CMS platforms.
• Familiarity with Terraform/Terragrunt for infrastructure-as-code.

❗️Please note that this role is office-based for Spain.

❗️If you need to be relocated, we take care of the process.

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 is an On-Site Position in Spain❗️

This is an on-site position based at our office in Spain, Valencia. Remote or hybrid arrangements are not available once you join the team.

Are you ready for an international move? 
To make your transition smooth, we provide full relocation support and visa sponsorship for successful international candidates ❗️

⚡ We are looking for an experienced Senior Backend Developer (Node.js) to join our development teams in Valencia and lead the backend technologies of our systems. This is a highly hands-on role: you will be actively writing and reviewing code, shaping architecture, and driving technical excellence while mentoring your team.

✅ Requirements:

✔️Strong knowledge of JavaScript and the ECMAScript 6 standards;

✔️5+ 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 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 an Intermediate level 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;
📝 Official employment following Spain/EU laws, including registration of family members;
✈️ Relocation package (flight tickets + 2-week hotel stay);
📚 Language development support and partial compensation for classes;
🎁 Birthday celebration gift;
🏝 23 working days of Annual Vacation for proper rest;

🏋️‍♂️Social Club and more than 50 events per year - coming soon;

⚖️ Competitive remuneration level with annual review;

🏄🏻‍♂️ Teambuilding activities.
 

Bold moves start here. Make yours. Apply today! 

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 is an On-Site Position in Spain❗️

This is an on-site position based at our office in Spain, Valencia. Remote or hybrid arrangements are not available once you join the team.

Are you ready for an international move? We are looking for candidates who are either already based in Lisbon or are eager to relocate to Portugal.
To make your transition smooth, we provide full relocation support and visa sponsorship for successful international candidates ❗️

⚡ We are looking for an experienced Team Lead Backend Developer (Node.js) to join our development teams in Valencia and lead the backend technologies of our systems. This is a highly hands-on role: you will be actively writing and reviewing code, shaping architecture, and driving technical excellence while mentoring your team.

✅ Responsibilities:

• Lead, mentor, and manage backend engineers through regular one-to-one sessions, feedback, performance evaluations, and individual development plans.
• Actively write, review, and refactor code and directly contribute to building and improving our systems.
• Participate in agile ceremonies (Scrum/Kanban) to ensure team alignment and adherence to agile best practices.
• Enhance system quality by resolving technical debt, optimizing architecture and flows, and performing data cleaning and restructuring.
• Design solutions and make key technical decisions for changes and enhancements.
• Assign tasks and balance workloads within the team to ensure efficient delivery.
• Collaborate with Engineering Managers to adopt the latest technologies and drive company-wide engineering initiatives.
• Document domain knowledge, improve engineering standards, and contribute to initiatives that enhance the broader engineering organization.

✅ Requirements:

• Bachelor’s, Master’s, or higher degree in Computer Engineering, Computer Science, Applied Mathematics, or a related field.
• 8+ years of professional backend development experience.
• 3+ years of experience in leadership positions.
• Strong experience with Node.js and modern web development.
• Knowledge of Kubernetes, containers, infrastructure, system design, SQL, and NoSQL databases.
• Experience with RESTful APIs, message brokers, 3rd party integrations, and secure development practices.
• Familiarity with CI/CD, microservices, cloud-based development, and test-driven development is a plus.
• Deep understanding of data structures, coding patterns, and algorithms.
• Experience with agile methodologies, ideally Scrum.
• Excellent problem-solving, diagnostic, and troubleshooting skills.
• Strong leadership, organizational, and mentoring abilities.
• Upper-intermediate or advanced English.
 

✅ 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 24 working days of Annual Vacation;
 

Join BrainRocket and rock with us! 🚀

Bold moves start here. Make yours. Apply today!

Hey there! 👋

We're looking for an expert full-stack React/Node.js engineer with experience in building AI tools to join our growing team! We're working on a product that has already made an impact in a major U.S. industry and has gained traction with several Fortune 500 companies. We're a small yet powerful team, but considering recent growth - expect plenty of opportunities of growth and a chance to tackle interesting engineering challenges!

What skills we expect you to have: 🎯

• English: Advanced (B2+)
• B.Sc. in Computer Science or similar;
• Excellent communication, collaboration, problem-solving, and analytical skills;
• 5+ years of writing commercial React.js and Node.js apps;
• Extensive experience with SQL-based databases;
• Extensive experience with Amazon Web Services;
• Understanding of LLMs and their application to building web applications;

What would be a huge plus: ✨

• English: C1
• Background in building your own side projects (please share links);
• Experience of leading engineering teams or initiatives at your previous company;
• Experience in building CI/CD pipelines;
• You have experience building AI apps (LangChain / LlamaIndex) and with MLOps;

What’s in it for you: 🌴

Professional Growth & Lifestyle:

- Remote work and flexible working hours (our team is 100% remote);

- Opportunity to join an international team of a fast-scaling startup;

- Leadership initiatives;

Benefits:

- Annual vacation: 20 business days (100% compensation)

- Annual sick leave: 10 business days (100% compensation)

- Competitive compensation.

Please, feel free to reach out should you have any questions!

Best regards,

Universium Team ❤️

🌟 About SelfInspection

SelfInspection is a fast-growing AI-driven vehicle inspection platform transforming how leasing companies, fleets, and financial institutions process vehicle damage assessments.

We combine computer vision, automation, and modern cloud architecture to deliver scalable and intelligent inspection workflows.

We are building a robust, event-driven backend system — and we’re looking for a strong Senior/Lead Backend Engineer to help us scale it properly.

🧠 What You’ll Do

• Design and build scalable microservices using NestJS (TypeScript)
• Architect and maintain event-driven systems using Kafka / RabbitMQ
• Design clean domain-driven services (inspection flows, reports, billing, notifications)
• Work with PostgreSQL (schema design, optimization, migrations)
• Improve system reliability, observability, and performance
• Participate in architectural decisions (modular monolith vs microservices boundaries)
• Collaborate closely with frontend, QA, and AI teams
• Write clean, testable, production-ready code
• Help improve CI/CD and deployment pipelines (AWS environment)

🏗 Tech Stack

• Backend: NestJS (TypeScript)
• Architecture: Microservices, Event-Driven
• Messaging: Kafka and/or RabbitMQ
• Database: PostgreSQL
• Cloud: AWS
• Containerization: Docker
• CI/CD: GitHub Actions (or similar)
• APIs: REST (future: gRPC)

✅ Requirements

• 5+ years of backend development experience
• Strong experience with microservices architecture
• Hands-on experience with event-driven systems (Kafka or RabbitMQ)
• Deep knowledge of NestJS or Node.js backend frameworks
• Strong experience with PostgreSQL (indexes, performance tuning, transactions)
• Understanding of distributed systems challenges (idempotency, retries, eventual consistency)
• Experience designing APIs and maintaining clean contracts
• Startup mindset: ownership, autonomy, speed

🎯 Nice to Have

• Experience with Domain-Driven Design (DDD)
• Experience with inspection, insurance, fintech, or fleet systems
• Familiarity with Kubernetes
• Experience building high-throughput systems
• Knowledge of AI/ML service integrations

💼 What We Offer

• Work on a real AI product with global customers
• Strong technical ownership
• Fast-paced startup culture
• Flexible work schedule
• Competitive compensation
• Opportunity to shape architecture decisions

💡 Who Will Thrive Here

Someone who:

• Thinks in systems, not just endpoints
• Cares about architecture quality
• Can balance speed and correctness
• Takes ownership instead of waiting for tickets

Would you like to lead a healthtech/fintech product that integrates directly with U.S. insurance companies?
We’re looking for a Senior/Lead Software Engineer (Node.js, Angular, and .NET) with the potential to lead a team
Remote + Top salary
Let’s discuss the details?

Main 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.

Mandatory Requirements

– 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

We offer

– Projects with a modern JS stack (React.js, React Native, Vue.js, Angular, Node.js)

– Work entirely remotely or in our office (Lviv, Kyiv or Krakow).

– Wellness: Medical insurance/sports compensation/ health check-up+flu vaccination at your choice

– Paid vacations and sick leaves, additional days off, relocation bonus

– Education: regular tech talks, educational courses, paid certifications, English classes

– One of the best IT employers in Lviv (or IT service companies in Ukraine) based on DOU rating.

About the role and client:
We’re looking for a talented and detail-oriented Node.js/AI engineer with strong experience in AI and Node development. You'll work with the product team to build AI assisted solutions.

Responsibilities:
- Integrate AI services (LLMs - classification systems, zero-shot, text generation, etc) into new and existing application architectures
- Adjust, refine, and version AI prompts and workflows to improve accuracy, reliability, and real-world performance in production systems
- Collaborate with designers, peers, and management to deliver consistent user flows and experiences
- Thoroughly test and debug code, participate in code reviews, provide documentation, and ensure systems meet quality standards

Requirements:
- At least 5+ years of experience as a full-stack engineer/Back-end engineer;
- Hands-on experience integrating AI or ML services into applications, including prompt design and iteration for LLM-based systems;
- A thorough understanding of how model parameters change output;
- Experience integrating third party APIs;
- Strong proficiency with Node.js, Express, etc and building RESTful and event-driven backend services;
- Comfortable working across multiple codebases and projects simultaneously;
- Experience with databases (primarily SQL) and data modeling for real-world applications;
- Attention to detail and strong testing experience.

Nice-to-Have:
- Knowledge of current AI models/services and their tradeoffs and advanced NLP techniques;
- Experience fine tuning models and building advanced chat bots;
- Familiarity with automated, testing frameworks (e.g., Jest, Cypress);
- Experience with monitoring, logging, and production debugging.

What the client offers:
- Competitive salary + performance bonuses;
- Remote‑first, outcome‑driven culture (potential for hybrid in Kyiv);
- Direct access to leadership, fast decisions, zero corporate layers;
- Opportunity to build and lead the AI function as we scale.

Botty — українська продуктова IT-компанія у сфері Crypto & FinTech, яка створює платформу для автоматизованої торгівлі криптовалютами.

Наша місія — зробити сучасні інструменти інвестування та алгоритмічної торгівлі доступними для широкого кола користувачів незалежно від їхнього досвіду. Ми створюємо технології, які допомагають людям більш усвідомлено управляти своїм капіталом.

Наразі наша команда активно зростає і ми шукаємо Senior Back-end developer, який (яка) допоможе нам забезпечити продуктивність і надійність бекенд-сервісів, які керують торговими ботами для криптовалютних бірж, стабільну інтеграцію мікросервісів, обмін даними та високошвидкісну обробку ордерів.

Наші очікування від кандидатів:

• Від 5-ти років у бекенд-розробці (бажано Node.js).
• Глибокий досвід розробки на Node.js та TypeScript. Досвід роботи з NestJS або аналогічними backend-фреймворками.
• Досвід розробки високонавантажених REST API.
• PostgreSQL — досвід оптимізації складних запитів, проєктування структур даних, індексації.
• Практичний досвід роботи з RabbitMQ: проєктування черг, обробка повідомлень, забезпечення надійності та масштабованості асинхронних процесів.
• Досвід розробки та підтримки мікросервісної архітектури, проєктування взаємодії між сервісами та забезпечення їх масштабованості.
• Практичний досвід роботи з Docker та Kubernetes: контейнеризація застосунків, налаштування деплою, масштабування та підтримка сервісів у production-середовищі.
• Highload оптимізація — розуміння performance bottlenecks, кешування, профілювання.
• Практичний досвід моніторингу та діагностики production-систем за допомогою Grafana, Prometheus, ELK або аналогічних інструментів.
• Досвід розробки безпечних backend-рішень із застосуванням практик захисту даних, контролю доступу та безпечної інтеграції API.
• Розуміння принципів взаємодії frontend та backend-систем.
• Досвід автоматизації процесів збірки, тестування та деплою застосунків за допомогою CI/CD-пайплайнів.
• Володіння англійською мовою на рівні В1 і вище.

Буде перевагою:

• Розуміння принципів роботи криптовалютних бірж, торгових ордерів та алгоритмічної торгівлі.
• Розуміння Web3-екосистеми та блокчейн-технологій.
• Досвід роботи з Crypto, FinTech або Trading продуктами.

Основні задачі ролі:

• Розробка та розвиток backend-платформи для автоматизованої торгівлі криптовалютами.
• Проєктування та реалізація API, інтеграцій із криптовалютними біржами та внутрішніми сервісами.
• Розробка нових функціональних можливостей платформи, включаючи торгові стратегії, управління ордерами та аналітичні інструменти.
• Оптимізація продуктивності та масштабованості сервісів, зменшення latency та підвищення стабільності системи.
• Розвиток і підтримка мікросервісної архітектури та асинхронної взаємодії між сервісами через RabbitMQ.
• Проєктування та оптимізація структури даних, SQL-запитів і продуктивності PostgreSQL (оптимізація індексів, запитів, проєктування схем).
• Забезпечення надійності, спостережуваності та продуктивності систем через моніторинг, логування та аналіз інцидентів.
• Забезпечення надійності, спостережуваності та продуктивності систем через моніторинг, логування та аналіз інцидентів (налаштування метрик у Grafana/Prometheus).
• Участь у побудові та вдосконаленні процесів CI/CD, контейнеризації та деплою сервісів.
• Впровадження практик безпечної розробки та захисту інтеграцій із зовнішніми сервісами (захист API, ключів доступу до бірж, обробка помилок).
• Проведення code review, технічна підтримка команди та менторинг Junior/Middle розробників.
• Забезпечення якості коду через автоматизоване тестування та підвищення fault tolerance критичних компонентів системи.

Що ми пропонуємо:

• Роботу над власним продуктом у сфері Crypto & FinTech, який активно масштабується на міжнародні ринки.
• Складні технічні виклики на перетині алгоритмічної торгівлі, highload-систем, мікросервісної архітектури та інтеграцій із криптовалютними біржами.
• Можливість впливати на технічні рішення, архітектуру та розвиток продукту.
• Високий рівень автономності та ownership — ми цінуємо ініціативу та довіряємо експертизі команди.
• Роботу в команді професіоналів, які створюють усі ключові технології та продукт in-house.
• Участь у розвитку платформи, якою вже користуються понад 9 000 користувачів по всьому світу.
• Повністю віддалений формат роботи.
• Конкурентну заробітну плату з прив’язкою до валюти.
• Оплачувану відпустку та лікарняні.
• Стабільний графік роботи: понеділок—п’ятниця, 10:00–19:00.