Jobs Node.js

IvorySoft is a people-first software engineering and IT consulting company. We provide complex technological solutions for startups and businesses from the USA, UK, Nordic countries, and Canada.

To meet our ambitious goals, we are looking for a Senior Node.js Developer to join our growing team that helps to build clean and innovative software products.

🎯 ABOUT THE PROJECT:

Our customer is a US-based dance academy building the backend infrastructure from scratch for their brand-new mobile application. The project focuses on creating a highly scalable, secure, and high-performance server-side environment. Key challenges include robust AWS cost optimization, smart database design, and building a backend that powers complex scheduling, gamification engine, and seamless real-time communication features.

RESPONSIBILITIES:

💻 Design and build a scalable backend from scratch using Node.js and TypeScript.

💻 Architect a highly efficient database structure to ensure maximum scaling with lower AWS bills.

💻 Implement backend logic for real-time data delivery, chat features, and live updates.

💻 Create an engine for gamification (calculating point systems, triggering leaderboards, and processing events).

💻 Build reliable services for geolocation tracking and timestamp-based triggers.

💻 Develop automation for autodrip scheduling features and connect external CRM platforms via API.

💻 Use modern AI tools (like Claude Code) to ensure maximum development speed and efficiency.

💻 Track working hours with software, provide daily progress updates, and maintain active communication.

REQUIREMENTS:

⚙️ 4+ years of experience in backend development with deep expertise in Node.js and ecosystem.

⚙️ Strong background in greenfield development, smart database design, and system architecture.

⚙️ Production experience working with real-time data (WebSockets, Socket.io, or AWS AppSync/IoT Core).

⚙️ Deep understanding of AWS services and cost optimization (knowing what drives AWS bills and how to build efficiently).

⚙️ Proven experience developing backend services for in-app chats and messaging solutions.

⚙️ Familiarity with handling geolocation, geospatial queries, and timestamp logic.

⚙️ Strong experience in API design, webhooks, and third-party CRM integrations.

⚙️ Commitment to rigorous internal QA and writing clean, scalable, maintainable code.

⚙️ Outstanding communication skills and readiness for daily tracking and updates.

Phage.Energy is a deep-tech Virtual Power Plant (VPP) platform.
We unify distributed energy assets, operational constraints, and market processes into a single real-time control system — from telemetry ingestion to dispatch and execution confirmation.

This is a backend-heavy product operating in real time, where reliability, determinism, and control logic are critical.
 

What You’ll Be Building

• The VPP control core: assets, groups/clusters, operating modes, and constraints.
• Telemetry processing and maintenance of the current platform state (availability, limits, readiness).
• Dispatch logic: preparing, sending, tracking, and validating control commands; handling retries and failures.
• Aggregation of platform-level indicators (power, availability, readiness) for dashboards and optimization logic.
• Production-grade behavior: stability, observability, fault tolerance, and predictable execution.
   

Technology Stack

• Backend: Node.js, TypeScript, NestJS
• Cloud: AWS (Lambda, API Gateway, IoT Core, Kinesis, DynamoDB, Timestream)
• Databases: PostgreSQL, DynamoDB
• Infrastructure: Serverless, Terraform, AWS SAM
• Frontend: React (API-driven)
• Protocols: MQTT, WebSocket, HTTP

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.

❗️Please note that this role is office-based for Poland, Warsaw.

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

We are looking for a skilled Senior Node.js Developer to join our team in our Warsaw office.

✅ 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:

🚀 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 leave;
🍲 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.

Bold moves start here. Make yours. Apply today! 

Key Responsibilities

• Lead technical decision-making and contribute to the architecture of a high-load, microservices-based gaming platform.
• Stay deeply hands-on and write production code every day. This is not an architecture-only or people-management role.
• Design, develop, and maintain scalable backend services that directly power our gaming products.
• Take ownership of complex backend systems, from technical design to delivery, monitoring, optimisation, and support.
• Continuously improve system performance, latency, reliability, and scalability in a high-throughput environment.
• Collaborate closely with Product Owners, engineers, and cross-functional teams to deliver features end-to-end.
• Drive and participate in code reviews, setting a high standard for clean, maintainable, efficient, and production-ready code.
• Conduct architectural reviews and guide the team toward practical, scalable, and long-term technical solutions.
• Solve complex business and technical problems with a strong engineering mindset and pragmatic decision-making.
• Act as a technical role model for the team by showing strong ownership, discipline, and engineering excellence.
• Mentor other engineers through daily collaboration, technical discussions, and hands-on example.
• Participate in on-call rotations within the squad to ensure system reliability, availability, and fast incident response.
• Grow toward technical leadership while remaining strongly connected to code, delivery, and system ownership.

Requirements

• Strong hands-on backend engineering experience with a proven record of writing production code on a daily basis.
• Solid experience with Node.js and TypeScript is highly preferred. Strong experts in other OOP languages such as Java, Python, C++, C#, or Go may also be considered.
• Strong understanding of asynchronous programming and event-driven architecture.
• Practical experience with distributed systems and messaging technologies such as Apache Kafka and gRPC.
• Experience working with relational databases such as MySQL or PostgreSQL.
• Experience with columnar databases such as ClickHouse and/or NoSQL technologies such as DynamoDB or MongoDB.
• Strong ability to design, build, test, deploy, and maintain production-ready backend services.
• Experience developing and maintaining unit tests, integration tests, and end-to-end tests.
• Proven ability to work with high-load, scalable, and business-critical systems.
• Strong debugging, problem-solving, and performance optimisation skills.
• Ability to make technical decisions independently and take responsibility for their impact.
• Strong code quality mindset, with a clear understanding of maintainability, reliability, and long-term system health.
• Readiness to grow into a technical leadership role while remaining hands-on.
• Degree in Computer Science, Software Engineering, or a related technical field.

Nice to Have

• Experience with large-scale microservices architecture.
• Good practical knowledge of Kubernetes.
• Experience with cloud providers, especially AWS.
• Understanding of application security and industry best practices.
• Understanding of enterprise development patterns.
• Experience with active performance monitoring, observability, and production system analysis.
• Experience in the gambling, gaming, or iGaming domain.
• Experience mentoring engineers or leading technical initiatives without moving away from coding.

What We Offer

• Competitive Salary: We offer a competitive salary, subject to annual performance reviews.
• Quarterly Bonuses: Benefit from a transparent and systematic quarterly bonus system.
• Unlimited Paid Vacation: Enjoy unlimited paid vacation leave, including Ukrainian bank holidays.
• Unlimited Paid Sick Leave: Take unlimited paid sick leave whenever necessary.
• Flexible Schedule: We offer a flexible work schedule to accommodate your needs.
• Remote Work: Choose to work remotely, providing greater flexibility and comfort.
• Medical Insurance: Receive comprehensive medical insurance for both you and a significant other.
• Financial Support for Life Events: We provide financial support during special life events.
• Professional Development: Get reimbursement for professional development courses and training.
• International Exposure: Attend industry expos, team gatherings, and global meet-ups.
• B2B Contracts.

Recruitment Process

1. HR Interview - 30–45 minutes
2. Interview with a Product Owner - 60 minutes
3. Technical Interview with Live Coding - 90 minutes
4. Final Interview with C-level - 60 minutes

 Hi! We are looking for a Senior Node.js Backend Developer to join our pack at SharksCode 🦈💙
 SharksCode is a Ukrainian IT company that develops high-tech software solutions and B2B platforms, particularly in the iGaming industry.
 We are looking for a Senior 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 experience with Node.js development.
– Have experience developing REST APIs and/or GraphQL services.
– Have strong proficiency in TypeScript.
– Have hands-on experience with MySQL or PostgreSQL.
– Have experience integrating third-party APIs and services.
– Have experience working with message queues (RabbitMQ, Kafka, or similar).
– Understand distributed systems architecture.
– Have experience using Redis for caching or Pub/Sub mechanisms.

Your future responsibilities:
– Design and develop backend services and product functionality.
– Build and maintain integrations with third-party financial and technical services.
– Develop public payment APIs and internal 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 working with high-load systems, especially with live or real-time data.
– Experience writing automated tests (Unit, Integration, E2E).
– Experience with WebSocket, gRPC, or other real-time technologies.
– Knowledge of architectural patterns such as CQRS, Event Sourcing, or DDD.
– Experience with Docker, Kubernetes, or CI/CD pipelines.
– Experience working in the iGaming or betting industry.

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.

Junior JavaScript / NestJS Developer

Junior JavaScript Developer with experience in backend development using NestJS and Node.js. Skilled in building and maintaining REST APIs, implementing server-side logic, working with databases, and supporting existing applications. Familiar with JavaScript, NestJS, Git, and basic software development principles, including clean code practices and debugging.

Worked with API integrations, database queries, authentication flows, and application performance improvements. Comfortable collaborating in team environments, following technical requirements, and learning new tools and frameworks quickly.

Looking for an opportunity to contribute to a product-focused team, grow as a backend developer, and deepen expertise in JavaScript ecosystem and scalable backend development.

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

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

Key Responsibilities:

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

Qualifications:

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

What We Offer:

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

We're looking for a Middle/Middle Strong Node.js developer with 3+ years of experience to join our team and contribute to an innovative project focused on transforming HR operations with AI. This is a fantastic opportunity to work on a platform that integrates with existing HR systems, handles a significant volume of employee requests, and automates various HR tasks, ensuring 24/7 personalized support across multiple communication channels.

Must have:

• Strong experience with TypeScript, Node.js, and PostgreSQL.
• Proven experience with AI/LLM integration.
• Solid understanding of backend architecture and API design principles.
• Product mindset with the ability to think beyond implementation details.
• Proactiveness and ownership mentality.
• Strong communication skills and ability to collaborate with cross-functional teams.
• Ability to work effectively in ambiguous environments and help define clear requirements.
• Experience working in startup environments.

• Upper - Intermediate or Advanced English communication skills.

   

Will be a plus:

• Experience with Microservices architecture;

   

Responsibilities:

• Develop and maintain high-quality backend services using Node.js and TypeScript.
• Design and implement robust integrations with AI/LLM models to enhance platform capabilities.
• Work with PostgreSQL to manage and optimize application data.
• Collaborate with cross-functional teams to deliver seamless and efficient HR solutions.
• Ensure the scalability, performance, and security of the platform.

• Participate in code reviews, contribute to architectural discussions, and drive continuous improvement.

   

 About the Project:

This intelligent HR automation ecosystem is designed to modernize workforce management by offloading high-volume administrative tasks. By syncing with internal directories and knowledge hubs, the system autonomously resolves nearly three-quarters of routine employee inquiries regarding compensation, corporate policies, and internal workflows. Beyond simple Q&A, it orchestrates end-to-end processes—from record updates to document generation—across global communication channels like Teams and Slack. The result is a 24/7 support layer that provides data-driven organizational insights while escalating high-priority cases to human experts.

Interview Stages

• 1-st stage - call with Recruiter
• 2-nd stage - Technical interview with our Senior developer
• 3-rd stage - Client interview

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

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

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

Our ideal candidate:

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

Requirements

Must have

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

Will be a plus

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

Responsibilities

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

About Project

Our client is a Software company from the USA.

Product

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

Stage

Active phase of development

Project team

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

Project Technologies

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

Work schedule

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

Interview Stages

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

Urgently looking for a Senior Backend Engineer for our active US-based client.

📌 TL;DR

Senior Backend Engineer

Core stack: TypeScript + NestJS

Strong SQL + Snowflake (data models & querying)

Experience debugging production data-heavy systems

Engineers actively using AI tools (Claude Code or similar) are a huge plus
 

LATAM or EU only (We are open to considering opportunities in Europe, but are willing to work a 6-hour overlap with New York)
 

Remote, full-time

ASAP start

⸻

📌 About the client

US-based company

AI-forward engineering culture, valuing engineers who actively use modern AI coding tools

Tech stack: TypeScript, NestJS, Snowflake, SQL, AWS

⸻

📌 Who we’re looking for

We’re looking for a Senior Backend Engineer to build features, solve complex client issues, and work directly with production logs.

This is a strictly backend-focused role (no frontend work), centered around data pipelines and API development.

Ideal candidate:

Must-have: Strong TypeScript and NestJS

Data expertise: Strong SQL skills and experience with Snowflake (understanding data models and query building)

Debugging skills: Comfortable working with production logs and solving real customer issues

AI-enabled: Experience with Claude Code or similar AI coding tools is highly valued

Nice to have: AWS, Terraform, Kubernetes

English: Upper-Intermediate+

Job Description:
Travel insurance through a fully digital, data-driven platform that delivers real-time travel care, streamlined claims, and proactive disruption handling.
We’re looking for a Senior Backend Developer to help build and scale the core systems powering our products end-to-end. In this role, you’ll take ownership of backend services, design and develop robust, scalable architectures, and work closely with product and engineering teams to solve meaningful challenges that directly impact our customers and partners.

You’ll work with modern technologies including Node.js, Nest.js, TypeScript, PostgreSQL, and AWS, in a fast-moving environment that values strong engineering fundamentals, a product-driven mindset, and a passion for solving complex problems at scale.

Responsibilities:
Design, develop, and deploy scalable, high-performance backend services that support web and mobile applications
Own backend features end-to-end
Write clean, maintainable, and well-documented TypeScript code
Build and optimize PostgreSQL schemas, queries, and data flows
Perform code reviews, troubleshoot production issues, and improve system reliability and performance

Requirements:
Minimum 6+ years of backend development experience
Strong Node.js and TypeScript proficiency
Strong advantage for Nest.js experience
Experience with PostgreSQL or similar relational DBs
Excellent troubleshooting and problem-solving skills  

Interview Process:
1) Team Lead interview
2) Home assignment + a technical meeting discussing this assignment
CTO + HR interview (additional if needed)

FFAIR is an award-winning UK-based event technology company that specializes in creating innovative and disruptive digital products for the events sector. We're seeking for a talented and motivated Strong Middle/Senior Software Developer to join our expanding team.

In this role, you'll work closely with our product and operations teams to build and enhance our digital products and services

Qualifications:

- 2+ years of commercial software engineering experience.
- Strong TypeScript, JavaScript, HTML/CSS.
- Backend: Node.js, NestJS, TypeORM, PostgreSQL, REST API, Redis, BullMQ.
- Frontend: React, Redux Toolkit, Zustand, React Query, react-hook-form, MUI, Vite.
- Cloud/infra: AWS, Docker, CI/CD (GitHub Actions).
- Experience with monorepos (pnpm workspaces).
- Solid Git workflow and code review discipline.
- Confident debugging with Chrome DevTools and observability tools (Datadog or similar).
- AI agents: hands-on experience with AI coding agents (Claude Code, Cursor, Copilot or similar) writing effective prompts, configuring agent instructions/rules.
- Excellent communication skills.
- Intermediate+ English (B1).

Nice to have
- Stripe, SendGrid, Socket.IO, React-PDF.
- Experience migrating legacy systems to a new stack.
- Firebase

Responsibilities:

- Develop, test, and ship features across backend, frontend, and legacy services.
- Build REST endpoints, background jobs, and real-time flows end-to-end.
- Cover code with unit and e2e tests; participate in code review.
- Investigate and resolve production issues using logs and APM.
- Contribute to architecture and product decisions.
- Keep up with the ecosystem and propose improvements.

Benefits:

- Competitive salary and benefits package

- Opportunities for growth, learning, and development

- A supportive and collaborative team culture that values diversity and inclusion

- Flexible working hours and remote work options

Hiring process:

1. Introductory screen: Our recruitment specialist will review your application and schedule a call to get to know you better and tell you more about the role and company.

2. Technical interview: You'll virtually meet with 1-2 members of our team to assess your technical skills, values fit, and cultural add. You may also be asked to complete a short task that closely mirrors some aspects of the role. The remote interview takes about 1-2 hours.

3. Reference checks: We may ask for 2-3 professional references to chat about your time working together.

4. Final decision: The project manager will consolidate all of the feedback and let you know of their decision.

5. Offer: If you are our perfect match, and we're yours, an official offer will be made!

6. If you're a highly motivated and passionate software developer who's looking for an exciting new challenge, we want to hear from you! Apply today and join our amazing team at FFAIR.

Trial: 3 months

Employment: Direct contract with UK company

About FFAIR Limited FFAIR is a UK-based event technology company that specialises in creating award-winning industry-leading digital products for the events sector. Our team of experienced event professionals has won numerous awards for our innovative and disruptive solutions, and we're passionate about driving growth and making exhibitions simpler for our customers.

At FFAIR, we believe that innovation, collaboration, and a customer-centric approach are key to our success. We have a supportive and collaborative team culture that values diversity and inclusion, and we're dedicated to providing our employees with opportunities for growth, learning, and development. We offer flexible working hours and remote work options, regular team-building events and activities, and a competitive salary and benefits package.

We're always looking for highly motivated and passionate software developers who are looking for an exciting new challenge. If you're interested in joining our amazing team at FFAIR, please check out our job postings or get in touch with us today.

Company website:
https://www.ffair.io/

We’re looking for a skilled Backend Developer with strong experience in NestJS and PostgreSQL who is eager to learn and grow with us. You’ll be developing and maintaining high-quality backend applications using modern Node.js technologies and scalable architecture approaches. This is a great opportunity to work on exciting projects, collaborate with a friendly team, and take your career to the next level. Come join us and let’s build great things together!

🧰 Requirements:

• At least 2 years of commercial experience as a Node.js engineer.
• Strong knowledge of JavaScript and TypeScript.
• Strong hands-on experience with NestJS.
• Experience with TypeORM.
• Strong experience with PostgreSQL.
• Good understanding of RESTful API design principles.
• Experience with unit testing (Jest or similar).
• Familiarity with AWS services (EC2, S3, Lambda) will be a plus.
• Excellent problem-solving and debugging skills.
• Strong communication and collaboration abilities.
• Pre-Intermediate English level or higher.

🧰 As a plus:

• Experience with message brokers such as RabbitMQ or Kafka.
• Experience with Docker.
• Experience with Redis, MongoDB, or Elasticsearch.
• Understanding of microservice architecture.

💻 Responsibilities:

• Developing and maintaining high-quality backend applications using NestJS and related technologies.
• Designing and implementing scalable RESTful APIs.
• Working with PostgreSQL databases and optimizing queries.
• Implementing and maintaining data models using TypeORM.
• Following high coding standards and best backend development practices.
• Troubleshooting and debugging applications to ensure optimal performance.
• Participating in code reviews to ensure code quality and maintainability.
• Collaborating with cross-functional teams to deliver tasks on time.
• Keeping up-to-date with industry trends and backend development best practices.

🎁 We offer:

• Competitive salary.
• Flexible working hours.
• Paid time off and holidays.
• Professional development opportunities.
• Collaborative and inclusive work environment.
• Opportunity to work on challenging and innovative projects.
• Growth opportunities within the company.

We’re building a cross-browser Fingerprint SDK and a high-performance backend for fraud detection and risk analysis. 

We’re looking for a Software Engineer who enjoys
working close to the browser, handling large-scale data, and solving non-trivial engineering problems.

DARLY SOLUTIONS is an international IT company specializing in delivering innovative solutions across FinTech, MedTech, SaaS, etc.

With years of experience in web and mobile development, UI/UX design, Quality Assurance, AI, and machine learning, we pride ourselves on creating impactful products that drive success for our clients.

Since 2018, we have successfully completed over 250 projects.
Examples of our work across various domains can be found on our website - https://www.darly.solutions/

We leverage cutting-edge technologies to craft powerful, forward-thinking solutions tailored to our clients’ needs. Our team is proficient in a diverse range of tools, including Angular, NestJS, React, Vue, PHP, Ruby, NodeJS, and many others.
 

What You’ll Work On
- Develop and maintain a cross-browser Fingerprint SDK using Vanilla;
- JavaScript/TypeScript, focused on performance, accuracy, and resilience against ad blockers and privacy restrictions;
- Build backend services with Node.js (Express) to process and analyze large volumes of collected data;
- Work with ClickHouse for analytical workloads and MySQL for transactional data;
- Design and optimize raw SQL queries for high-performance data access;
- Contribute to fraud detection and risk analysis systems by identifying patterns and anomalies in data.

What We’re Looking For
- 3+ years of experience with JavaScript/TypeScript and raw Node.js (Express)
- Strong experience with JavaScript in the browser

- Experience writing and optimizing raw SQL queries
- Familiarity with high-volume data processing or analytics systems
- Bonus: experience with fingerprinting, anti-fraud systems, or cybersecurity

Nice to Have
- Experience dealing with ad blockers, tracking prevention (Safari/Firefox), or
similar constraints
- Background in security, fraud detection, or risk analysis

What we offer:

- Flexible work format - remote, 8-hour working day without time trackers;
- Competitive salary;
- TIght-knit and friendly team;
- Personalized career growth;
- Up to 50% coverage of the cost of professional courses;
- Vacation time, sick-leaves, national holidays ;
- Competitive bonuses for a personal recommendation of new employees;
-Professional development tools (mentorship program, tech talks and workshops);
- English classes with a teacher;
- Corporate events and team buildings.

Main requirements

• We’re seeking a super-experienced Senior Fullstack Developer with deep expertise in JavaScript/TypeScript, particularly in Node.js, React, and Supabase, combined with practical experience in AI prompt engineering. You’ll architect, build, and optimize scalable applications that seamlessly integrate AI-assisted functionalities and modern cloud backends.

Requirements

Position Name: Senior FS Developer
Level: Senior FS Developer
Hard skills requirements (including years):

• 6+ years of Software Engineering experience
• 4-5 years of experience with Node.js (Express.js, koa.js, Nest.js)
• Strong experience and understanding of React, including Hooks and Context
• Strong experience and understanding of AWS
• Strong Software Design knowledge: OOD, FP, Design patterns
• Excellent knowledge of modern systems architecture components including microservices, event sourcing, and distributed data processing systems
• Proficient understanding of Git
• Excellent understanding of both NoSQL and SQL databases
• Experience with Docker & CI/CD processes
• Experience with Serverless framework, AWS Lambdas, AWS Cloudformation
• Knowledge of Agile (preferably SCRUM) development practices
• At least Upper-Intermediate level of English

Would be great 😎 :

• Strong experience with TypeScript
• Experience as a Tech / Team lead on projects
• A сomputer science, software engineering, or related field master’s or bachelor’s degree.
• Hands-on experience with messages queuing/delivery services (Amazon SQS, SNS, RabbitMQ, Kafka, etc.)

Responsibilities:

• Process improvements proposing and taking ownership of full-cycle of features delivering
• Active participation in technical discussions
• Actively participate in architectural design sessions, overall team meetings, product meetings, communities of practice, etc.
• Create an architectural design to illustrate high-level solutions to an application and feature requests
• Architect, design, and team cooperation to deliver features and services into production
• Writing and implementing efficient, extendable, and high-quality code in balance with rapid feature delivery
• Cross code reviews, technical documentation creation, and supporting

Upper English is a must