Jobs Node.js

We are looking for an experienced Senior Full Stack Engineer with strong Node.js and TypeScript expertise to take ownership of production applications and build scalable web solutions across backend, frontend, database, and cloud environments.

Responsibilities

• Design and develop scalable web applications and backend services using Node.js and TypeScript
• Build REST or GraphQL APIs with NestJS or similar frameworks
• Develop modern frontend applications using React or Next.js
• Design and optimize PostgreSQL database models and queries
• Integrate third-party services and enterprise systems
• Implement automated testing and CI/CD pipelines
• Participate in architecture and technical-planning discussions

• Take ownership of development tasks and delivery

   

Requirements

• 5+ years of professional software-development experience
• Strong commercial experience with Node.js and TypeScript
• Experience with NestJS or similar backend frameworks
• Strong knowledge of PostgreSQL, SQL, and relational database design
• Strong experience with React, Next.js, or similar frontend frameworks
• Experience with Docker, cloud deployment, and CI/CD
• Strong understanding of REST APIs and modern web application architecture
• Ability to work independently and take ownership of delivery

• Professional English

   

Nice to have

• AWS or Azure
• Kubernetes and Terraform
• Kafka, RabbitMQ, or other event-driven technologies
• Microservices and enterprise integrations
• GraphQL
• AI/LLM integration experience
• Experience in FinTech, banking, insurance, healthcare, or other regulated domains

This is an application to join CML Team. Selected engineers will be contacted when a suitable project matches their experience, availability, location, and rate.

To apply: Please include your CV, current location, availability, preferred contract type, and expected hourly or daily rate.

We are looking for a Junior-Middle Backend Developer to join a fast-growing start-up developing a product for automated lead generation and recruitment outreach.

Responsibilities:

• Day-to-day product implementation.
• Develop integrations with AI (e.g., Perplexity, OpenAI) & 3rd party API (e.g., CRMs).
• Leverage your prompt engineering skills to maximize the outcome.
• Customer discovery. That includes: internal product conversations, as well as joining some customer calls (Maybe not from day one, but definitely later on).

Requirements:

• At least 1 year of experience working in a product company/startup.
• 1-3 years of software development experience.
• Experience with Node.js, TypeScript, JSON, REST API, Git.
• Experience in LLM/RAG, MCP, and AI agent development and prompt engineering.
• Database design and optimization (SQL).
• Development in cloud infrastructure (AWS/GCP/Azure).
• Patterns for asynchronous task processing (RabbitMQ, SQS, or similar).
• Experience with n8n/make will be a great plus.
• Excellent verbal communication skills.
• Excellent English, minimum B2 level.
• Absolutely customer-centric and flexible in a dynamic environment (i.e., fully tolerant of shifting priorities daily).

Job details:

• Full-time.
• Fully remote.
• Long-term.
• B2B contract.
• Start date — ideally ASAP, but negotiable.

What else will you get:

• Learning how a startup grows.
• Direct impact on product and company strategy.
• Deliver value directly to paying B2B clients.
• You will work with the most modern toolset (including Cursor in Agent mode).

The hiring process:

• 30-45 min pre-screen interview with a recruitment manager.
• 30 min call with the client.
• A technical deep-dive interview, most likely with online coding (conducted by the client).

Is game engine logic and RTP calculation your superpower? There’s a chance to join a fresh team at a leading iGaming company as a Senior Software Engineer. TOP conditions await: above-market salary, quarterly bonuses, unlimited PTO, and a stable home for years to come!

This role sits at the intersection of engineering, game mathematics, platform, and compliance. You’ll work on the tools, frameworks, and services that enable our mathematicians and game teams to build, validate, run, and monitor game logic in production.

This position is about deep ownership of a very specific technical domain: game engines, mathematical packages, simulation data, RTP monitoring, round details, and integrations with games developed both internally and by external studios.

You’ll be part of a small, experienced team with a high level of responsibility. The impact of this work is direct: incorrect game logic, missing round details, or inaccurate RTP monitoring can affect game delivery timelines, business performance, and regulatory readiness.

If you enjoy working close to complex domain logic, reviewing technical implementations, understanding how games work under the hood, and owning systems where precision matters – this role will feel like home.

Main Responsibilities

– Own, maintain, and evolve company’s Game Engine domain

– Work on internal frameworks and libraries used by mathematicians to implement game logic and mathematical packages

– Review and validate code written by mathematicians, ensuring quality, correctness, maintainability, and proper usage of internal frameworks

– Contribute to the development and support of game engines used to run mathematical logic within our platform

– Support integrations with external game studios by helping build wrappers and bridges between third-party game implementations and Playson’s platform

– Work with data structures and protocols that connect game logic with frontend and backend systems

– Contribute to RTP monitoring processes, including validation of production transaction data against simulation data and expected mathematical behaviour

– Support and evolve tools used for mathematical review, simulations, data files, monitoring, and alerting

– Implement and maintain round details logic required for regulated markets, ensuring that detailed game round information can be correctly provided to partners and regulators

– Collaborate closely with mathematicians, backend engineers, platform teams, compliance stakeholders, and product representatives

– Participate in code reviews and technical discussions to ensure a high engineering standard across the Game Engine domain

– Investigate issues related to game logic, mathematical validation, monitoring, and engine behaviour

– Participate in minimal on-call responsibilities related to the systems owned by the team, mainly around monitoring, alerts, and domain-specific incidents

– Take ownership of a highly specialised area where quality, accuracy, and attention to detail are essential

Mandatory Requirements

– Strong software engineering experience, ideally in backend, game engine, gaming, gambling, betting, or simulation-heavy environments

– Solid experience with Node.js/TypeScript, or strong expertise in another OOP language such as C++, Java, C#, Go, or Python

– Good understanding of software architecture, code quality, testing, debugging, and maintainability

– Experience reviewing complex code and providing clear technical feedback

– Ability to understand domain-specific logic and work with technical systems where business rules, mathematics, and engineering are closely connected

– Strong problem-solving skills and ability to work with complex, non-standard technical challenges

– Experience working with production systems where reliability, accuracy, and correctness are critical

– Understanding of backend systems, APIs, data flows, and service-to-service communication

– Ability to collaborate closely with non-engineering technical experts, especially mathematicians or domain specialists

– Strong ownership mindset and willingness to become a key expert in a narrow but highly important technical domain

– Product-oriented thinking, with an understanding that games are the core product and engineering decisions directly affect delivery, quality, and compliance

– English communication skills sufficient for working in an international environment

Nice to Have

– Experience in iGaming, gambling, betting, game development, or casino games

– Experience working with game engines, mathematical engines, simulation tools, or game logic frameworks

– Background in C++ or experience working with legacy C++ systems

– Experience with mathematical models, probability-based systems, simulations, random generators, or RTP-related logic

– Understanding of regulated markets and compliance requirements in iGaming

– Experience with ClickHouse or other analytical/columnar databases

– Experience with monitoring, alerting, and production diagnostics

– Experience with AI-assisted code review or automated validation tools

– Knowledge of microservices architecture and distributed systems

– Familiarity with Kafka, gRPC, Kubernetes, or AWS

– Experience integrating third-party games, external studio products, or wrapper-based solutions

– Ukrainian language skills would be a plus

We offer

– Competitive Salary

– Quarterly Bonuses

– Unlimited Paid Time Off

– Unlimited Paid Sick Leave

– Remote & Flexible Working

– Private Medical Insurance

– Financial Support for Life Events

– Professional Development Budget

– International Exposure

– Regular Company Events

*Benefits may vary depending on location and contractual agreement

Recruitment Process

– HR interview

– Technical interview (with Live coding)

– Final interview

This role is more focused on backend development with Node.js and TypeScript, but it also requires React experience so you can handle your frontend tasks independently rather than relying on a frontend developer.

Infrastructure and production environments are handled by a separate DevOps team, so your focus will remain on application development rather than production support or infrastructure management.

Responsibilities

1. Design, develop, and maintain backend services throughout the full development lifecycle
2. Assist with frontend implementation when needed to deliver product features
3. Release new functionality and monitor feature stability after deployment
4. Work closely with Product, Platform, and Reliability teams
5. Contribute to technical improvements and enhancements within the existing architecture

Tech Stack

Node.js, TypeScript, React, Redis, MySQL, PostgreSQL, Elasticsearch, Kafka/RabbitMQ, monitoring and observability tools

Requirements

• Strong hands-on commercial experience with Node.js and TypeScript
• Experience with React and modern frontend engineering practices
• Solid experience with databases, caching, and data management approaches
• Experience investigating and resolving issues in distributed environments
• A product ownership mindset, with the ability to take features from concept to production
• English communication skills for daily collaboration and team meetings

Nice to Have

Experience with microservice architectures and API development

Experience with Docker and Kubernetes

Knowledge of application performance tuning and optimization

Basic understanding of Linux and networking

Familiarity with clean architecture principles and testing methodologies

What the Company Offers

• Fully remote work environment with a flexible schedule
• Paid vacation and days off
• Salary reviews twice a year
• B2B/contractor cooperation model with accounting support
• An opportunity to work on a large-scale product and influence technical direction

DBB Software - is a software engineering IT company from Ukraine with a unique point of difference. We provide an exciting concept involving highly trained and vetted remote software developers to provide businesses with everything they need in the information technology space. Whether it’s end-to-end IT or smaller, focused areas and individual projects, we cover it all, and our approach allows us to offer exceptionally competitive pricing.

During 8 years on the IT market we successfully released more than 30 projects and have a wide-geographic of clients in Europe, USA and Canada.

Now we are continuing growing and extending our team so we warmly invite Junior Backend Developer (Node.js) to our team in Dnipro city!

What requirements are important for this role:

-At least 1 year of professional experience with TypeScript, Node.js, express, nest.js;

-Experience with SQL, PL/SQL, preferred experience on MERN stack and next.js;

-Experience with Swagger and/or API documentation tools;

-Experience with git and CI/CD;

-A solid understanding in logging, security concepts;

-A solid understanding of REST, and core JavaScript concepts;

-A solid understanding of relational data and/or non-relational models;

-Experience with performance and optimisation problems and a demonstrated ability to both diagnose and prevent these problems.

What we are expecting from new teammate:

-Effective communication skills: Regularly achieve consensus with peers, and clear status updates;

-Positive and solution-oriented mindset;

-Strong sense of ownership, urgency, and drive;

-An inclination towards communication, inclusion, and visibility;

-Self-motivated and self-managing, with great organizational skills;

- English level - at least Intermediate strong;

-Ability to work in our Dnipro office required.

Working with our team is:

-Flexible schedule;

-Benefit package with paid vacations and sick-leaves;

-Salary reviews in regular basis;

-Autonomy in decision-making, no bureaucracy and pressure;

-People-oriented culture and healthy atmosphere in the team;

-Whole support from company management;

-Office in Dnipro with whole BCP support: generators, power stations and Starlink, only office type of work.

Who we are     

We are a Ukrainian multiproduct company for more than 500.000 clients from 120 countries.  

Since 1997, we have been streamlining data workflows for professionals and teams with our intuitive and efficient software products. We’re committed to enhancing our customers' experience across the globe by minimizing data-related tasks and enabling them to focus on more inspiring goals. Whether it’s Fortune-100 companies or individuals, we provide a customer-centric approach, delivering high-quality solutions and exceptional support.  
   

Product that needs your engagement     

Mobion is a cloud-based white-label platform for ride-hailing and corporate transport services. Launched in 2016 by Devart, it supports operators in 6+ countries and has handled over 20 million rides for 4M+ users and 500K drivers.  

Our ecosystem includes rider and driver apps, a real-time dispatch system, admin dashboards, and branded web portals — all backed by a secure, scalable Azure infrastructure. We offer both SaaS and franchise models to help partners grow fast across regions. 
 

Your future team of professionals     

You will lead and work closely with the Mobion Backend Team, currently consisting of four Backend Developers. In this role, you will combine hands-on engineering with technical leadership, helping the team make sound architectural decisions, improve engineering practices, and deliver reliable backend solutions. 

We value ownership, curiosity, collaboration, and open feedback. You will play a key role in mentoring developers, driving technical improvements, and creating an environment where the team can grow while solving real product and business challenges. 

Your future challenges and opportunities 

Opportunities 

• Lead the technical evolution of a business-critical backend platform used across multiple countries.  
• Shape backend architecture, engineering standards, and technical practices across the team.  
• Modernize a mature Node.js/TypeScript platform while continuing to deliver business value.  
• Mentor Backend Developers and introduce modern engineering practices, including AI-assisted development. 
   

Challenges 

• Balance continuous product delivery with gradual modernization of a complex production system.  
• Reduce technical debt and architectural coupling without disruptive rewrites.  
• Strengthen automated testing, observability, reliability, security, and CI/CD practices.  
• Lead technical change while aligning decisions across Product, QA, DevOps, Architecture, and Engineering teams. 
   

Impact you will make  

As Lead Backend Developer, you will take technical ownership of Mobion’s backend platform, combining hands-on development with architecture, engineering improvements, and team leadership. 

• Lead backend architecture and technical decision-making for the Mobion platform.  
• Combine hands-on Node.js/TypeScript development with technical leadership of the Backend Team.  
• Drive the gradual modernization of legacy components while maintaining platform stability and delivery speed.  
• Improve system performance, reliability, observability, automated testing, and CI/CD practices.  
• Mentor Backend Developers, support technical growth, and strengthen engineering standards across the team.  
• Collaborate with Product, QA, DevOps, and Software Architecture to turn business needs into scalable technical solutions. 
   

Skills we are looking for     

• 5+ years of hands-on backend product development experience with strong proficiency in Node.js and TypeScript.  
• 2+ years of experience as a Team Lead, combining hands-on development with team leadership 
• Strong experience with SQL and NoSQL databases, including PostgreSQL/MySQL and Redis.  
• Experience designing and evolving distributed systems, REST/WebSocket APIs, and event-driven integrations.  
• Experience modernizing legacy systems through incremental refactoring, automated testing, and CI/CD practices.  
• Solid experience with cloud-native production environments, including Azure, Kubernetes, observability, reliability, and application security.  
• Experience driving technical improvements across architecture, code quality, and engineering practices, combined with strong mentoring and leadership skills. 
• Experience or strong practical interest in AI-assisted engineering and spec-driven development.  
• Experience with mobility, logistics, or transportation products is a plus. 

Benefits you get 

• Maintain your work-life balance 

Manage your own working hours with our flexible schedule 

19 days of annual vacation granted on a pro-rata basis 

No overtimes required 

• Hybrid type of cooperation 

Whether you prefer to work remotely in the comfort of your home office or from one of our 4 offices, you can still take part in increasing the world`s awareness about quality Ukrainian products from any part of the world 

• Stay healthy 

Medical insurance from one of the top insurance companies in Ukraine with a wide range of included services, as well as special programs for relatives; and special options for those who live abroad. 

15 working days of sick leave per year — because your health is a priority. 

• Grow with us 

In-house English courses — increase your proficiency through our online courses and speaking clubs with a native speaker 

Online learning activities — workshops, lectures, and webinars to enhance your leadership, management, and self-awareness skills 

Experience exchange — we are proud of our team of professionals who gladly share their deep expertise in all kinds of fields with the rest of the team 

Promotions, rotations, and transitions — when you believe your skills could benefit a different role or team. 

• Stand with Ukraine! 

We have an active pro-Ukrainian position, and that means we help our army, our servicemen, and their families not only through constant donations and volunteering, but also through our military leave policy, special health insurance options, and financial help 

We are a perfect match if you share our values 

We are professionals in our field. 

We know how to turn up our professionalism to the maximum, because we are experts who enjoy solving complex tasks. 

We know how to focus on the product, think big, and at the same time delve deep into the details. 

We create a calm and friendly atmosphere within the company. 

We value the freedom of open and transparent communications. 

Radical honesty is embedded in the foundation of our culture. 

We are open to new things and constantly develop and practice regular knowledge sharing, which helps us evolve continuously. 

Most importantly, the company creates an environment where we can fulfill our potential upon a solid foundation. 

Our Hiring Process 

• Recruitment Interview 
• Technical Interview 
• Case Interview 
• Offer Call 

We strive to ensure transparency and openness in the hiring process, and we understand the importance of providing timely feedback. If your resume meets the job requirements, we will contact you to clarify details and schedule an interview within 2 weeks after your application is submitted.  

The timeframe for feedback between interview stages may take up to 2 weeks. 

SCIMUS is a software development outsourcing company with 10+ years of experience, helping businesses scale their engineering capacity across industries such as Healthcare, eCommerce, AdTech, and more. We're proud of our delivery track record: 95% of projects delivered on time, a 92% Net Promoter Score, and 9 out of 10 clients returning for repeat work.

We are currently seeking a Data Migration Engineer to join a healthcare data migration project. You will extract, transform, and migrate patient and practice data from a wide range of Electronic Health Record (EHR) systems into a unified platform. 

About You

• Resourceful and relentless problem-solver - when the easy path fails, you find another;
• Meticulous attention to detail, especially where sensitive data is concerned;
• Align with key ethical principles, consistently demonstrating responsibility, confidentiality, and integrity;
• Able to deliver under deadline pressure without cutting corners on quality.

Requirements

• Strong programming skills, with hands-on experience in Node.js / JavaScript (ES Modules);
• Confident, strong Linux user: command line, shell scripting (grep, sed, awk, find), ssh, permissions, and cron/scheduled tasks;
• Proven experience with web scraping, API integration, and/or RPA, and the ability to pick the right data-acquisition approach per system: public APIs, unofficial/internal APIs, browser automation, HTML parsing, file exports, or RPA;
• Solid experience with the core stack: MongoDB, axios, puppeteer, cheerio, and cookie/session handling (tough-cookie / http-cookie-agent);
• Comfort parsing and normalizing many data formats - JSON, CSV, XML, HL7, CCDA, PDF, XLSX, and Access databases (csv-parse, fast-xml-parser, xlsx, mdb-reader, pdf-parse, officeparser, simple-hl7);
• Schema definition and data validation with zod;
• Familiarity with git, eslint + prettier, vitest, and Docker/docker compose;
• Careful, secure handling of sensitive patient data - least privilege, and data protected in transit and at rest;
• A track record of delivering on tight migration deadlines without compromising data accuracy.

Nice to Have

• Prior experience with EHR / healthcare data systems;
• Familiarity with HIPAA and healthcare data privacy regulations;
• Experience reverse-engineering undocumented APIs;
• Experience with additional headless-browser frameworks (e.g., Playwright).

As a Data Migration Engineer, You Will

• Design and build data extraction pipelines from EHR systems, using whatever approach the source system demands;
• Map and transform heterogeneous source data into standardized schemas;
• Own the end-to-end migration for assigned practices, from raw export to validated import;
• Write tests and validation checks to guarantee data completeness and accuracy;
• Take ownership of your migration timeline, anticipate blockers early, and deliver on schedule;
• Handle all patient data with care, confidentiality, and integrity, following the principle of least privilege;
• Collaborate with the team to continuously improve extraction, mapping, and tooling.

What We Offer

• You can fully realize your potential in a supportive environment where your experience is valued.
• We believe in continuous learning and development - you'll have access to a library, weekly tech talks, and course compensation (including English classes);
• If you love sharing knowledge, we'll fully support you!
• 20 days of Paid Time Off;
• A friendly, open atmosphere free from unnecessary bureaucracy, with a team that has a great sense of humor, where creativity and initiative are encouraged.
• Regular team events, including Friday pizza parties 🍕

More About SCIMUS

🔗 Company site: https://thescimus.com 
🔗 Company profile on DOU: https://jobs.dou.ua/companies/scimus-solution/

🚀 If you want to grow, contribute, and work in a friendly, creative, and ambitious team, we'd love to hear from you!

Our promotional features team is seeking a Senior Backend Engineer. This role is focused on developing and optimising promotional features for our gaming platforms, where performance, scalability, and cutting-edge solutions are paramount.

If you’re a product-passionate person, your mind is keen to solve deep tech engineering problems, and you have a fast “PoC first” approach with a deep sense of ownership, we would love to hear from you.

Main Responsibilities

– Develop and maintain robust backend systems for our promotional features

– Optimize existing systems for enhanced performance and scalability

– Lead technical decisions and contribute to our SaaS solutions

– Collaborate with distributed teams to innovate and implement new features

– Ensure code and architectural excellence through reviews

– Address complex technical challenges with innovative solutions

– Participating in on-call rotations within the squad to help ensure the reliability and availability of our systems

Mandatory Requirements

– Strong proficiency in Node.js and TypeScript (our primary backend stack). We’re also open to strong backend engineers from other ecosystems (e.g., Go, Java, C#, C++) who are ready to ramp up quickly

– Strong understanding of asynchronous programming and concurrency patterns

– Experience building distributed systems and working with messaging and coordination tools (e.g., Kafka, RabbitMQ, NATS, distributed locks)

– Experience with gRPC in production environments

– Solid knowledge of databases: relational (MySQL, PostgreSQL), columnar (ClickHouse), and NoSQL (DynamoDB, MongoDB)

– Experience with cloud platforms (AWS/GCP/Azure) and Kubernetes

– Skilled in building and maintaining unit and end-to-end tests

– Proven track record of delivering production-ready solutions

– Experience working with large-scale microservices architectures

– Degree in Computer Science or a related field (or equivalent practical experience)

Nice to Have

– Understanding of enterprise development patterns

– Experienced with large-scale microservices architecture

– Experience with cloud providers (AWS, GCP, etc.)

– Active performance observation

– Gambling domain experience

– Understanding of application security and industry standards, its best practice

We offer

– Competitive Salary

– Quarterly Bonuses

– Unlimited Paid Time Off

– Unlimited Paid Sick Leave

– Remote & Flexible Working

– Private Medical Insurance

– Financial Support for Life Events

– Professional Development Budget

– International Exposure

– Regular Company Events

*Benefits may vary depending on location and contractual agreement

What should you know about SKELAR? It's a venture builder — in other words, a company that builds companies. Together with founders, we create consumer businesses that become leaders in global markets across EdTech, Mental Health, Petcare, FashionTech, and beyond.

Our teams build tech products that win recognition from Product Hunt and The Webby Awards, earn thousands of glowing Trustpilot reviews, and reach over 10 million users worldwide. That kind of impact doesn't happen by accident — it starts with exceptional people, and our people are our top priority.

We've built an environment where expertise meets opportunity, and where there's no ceiling on what you can achieve. Now we're looking for the kind of people who don't just want a job — they want a challenge.

We’re looking for a Middle Node.js Developer for our partner company, Duomo.

Duomo is an app rooted in Christian values, helping people turn Scripture into daily habits and inner peace. We’re building a leading Christian-tech product for people seeking spiritual renewal.

You will be responsible for:
 

• Driving MarTech Automation: Designing, developing, and scaling backend services to automate marketing technology processes and integration workflows.
• Streamlining Creative Processes: Building robust tools and systems that automate the asset lifecycle and streamline creative operations for the team.
• Enhancing System Observability: Implementing comprehensive tracking, metrics, logs, and tracing (Observability) to ensure high system visibility and performance monitoring.
• Strengthening Infrastructure Reliability: Expanding test coverage (unit, integration, end-to-end) and setting up automated testing pipelines to ensure high code quality and fault tolerance.
• Architecting Scalable Solutions: Participating in system architecture design, code reviews, and optimizing backend performance to support business growth.

What you need to succeed in this role:

• 2+ years of experience with Node.js + TypeScript & NestJS.
• PostgreSQL + any typed ORM (Drizzle, Prisma, or TypeORM).
• Redis & Message Queues (BullMQ, RabbitMQ, or SQS) — hands-on experience with idempotency, retries, and distributed locks.
• Third-party REST API integrations — handling rate limits, pagination, and partial failures.

• Docker, CI/CD, and unit testing with Jest

   

  Nice-to-Have Requirements

• Experience with Facebook Marketing API, Google Ads API, or other ad platforms (TikTok, Applovin)
• Cloud & Infra: AWS (ECS, ECR, S3, Lambda) and GitHub Actions
• Observability: Prometheus, Grafana, and structured logging
• Integrations with Airtable API and Google Sheets API
• Practical experience with LLM APIs (Claude, Gemini) — structured output and prompt versioning

Why Duomo:

— You’ll work on a product with a clear mission and real values.
— You’ll help us transition from a content-rich app into a truly connected spiritual platform.
— You’ll be early enough to influence how product is done at Duomo long-term.

What we offer:

— Competitive salary;
— Significant impact on a rapidly growing business and contribution to how it shapes up;
— Ample career opportunities for ambitious growth and development;
— A possibility to attend internal, external courses, seminars and the access to a corporate library;
— Comfortable working environment. We provide all necessary work equipment for your role and serve complimentary breakfasts, lunches, and snacks in the office;
— 20 days of paid vacation, medical insurance and a variety of sports activities available for employees inside and outside the office.

At SKELAR, we've built an environment where people can grow, build, and do the most meaningful work of their careers:

• SKELAR Platform. The operational backbone of our venture builder. It exists to help founders move faster and easier — so business teams can stay laser-focused on the product while 10+ specialized Platform takes care of everything else: Legal, Finance, HR, Admin, Talent Acquisition, Employer Branding, IT, and more.
• Networking and knowledge-sharing as a way of life. Our people include co-founders who've launched multiple businesses and some of the sharpest specialists in the industry. Whatever expertise you need, it's never far away.
• Learning programs you won't find anywhere else. We've developed our own educational tracks for teammates to choose from — a two-month school for first-time managers, intensive AI workshops, and professional clubs for engineers, product managers, and more.
• Meaningful impact in Ukraine. The SKELAR Foundation was created by our own people, and every employee plays a part in bringing important social initiatives to life. We founded Europe's first accelerator for veterans and are working to build lasting support structures for veterans at a national scale.
• Spaces designed to inspire. Our offices are places people actually want to be — with an in-house gym, a climbing wall, Bali-inspired green spaces, and libraries. Every detail, from service and security to comfort and design, is built to match the pace of our growing teams.
• Everyday comfort built in. Meals, gym access in Kyiv or a partial fitness stipend in Warsaw, health insurance, paid business travel where the role requires it, and corporate partner discounts.

We'd love to tell you more in person.

Join us at SKELAR and help build the next big everything!

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! You would be joining a truly fast-growing team and working on a product that is already having a significant impact in the United States. 

Although this position expects you to be a full-stack engineer, your focus will be mostly on the back-end infrastructure and the optimization of the existing product architecture (80% back, 20% front).

Our preferred candidate will have: 🦄

• Strong experience with building scalable back-end infrastructure;
• Working with high-load systems;
• Optimizing systems with relational databases (PostgreSQL);
• Extensive experience with Elasticsearch;
• Clear demonstration of leadership initiatives in optimizing & scaling cloud infrastructure;

We also expect from you the following: 🎯

• English: Advanced (C1+, initial screening is conducted in English);
• 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’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 if you have any questions!

Best regards,

Universium Team ❤️

About the Role

Our promotional features team is seeking a Senior Backend Engineer. This role is focused on developing and optimizing promotional features for our gaming platforms, where performance, scalability, and cutting-edge solutions are paramount.
If you’re a product-passionate person, your mind is keen to solve deep tech engineering problems, and you have a fast "PoC first" approach with a deep sense of ownership, we would love to hear from you.

Key Responsibilities

• Develop and maintain robust backend systems for our promotional features.
• Optimize existing systems for enhanced performance and scalability.
• Lead technical decisions and contribute to our SaaS solutions.
• Collaborate with distributed teams to innovate and implement new features.
• Ensure code and architectural excellence through reviews.
• Address complex technical challenges with innovative solutions.
• Participating in on-call rotations within the squad to help ensure the reliability and availability of our systems.

Requirments

• Strong proficiency in Node.js and TypeScript (our primary backend stack). We’re also open to strong backend engineers from other ecosystems (e.g., Go, Java, C#, C++) who are ready to ramp up quickly.
• Strong understanding of asynchronous programming and concurrency patterns.
• Experience building distributed systems and working with messaging and coordination tools (e.g., Kafka, RabbitMQ, NATS, distributed locks).
• Experience with gRPC in production environments.
• Solid knowledge of databases: relational (MySQL, PostgreSQL), columnar (ClickHouse), and NoSQL (DynamoDB, MongoDB).
• Experience with cloud platforms (AWS/GCP/Azure) and Kubernetes.
• Skilled in building and maintaining unit and end-to-end tests.
• Proven track record of delivering production-ready solutions.
• Experience working with large-scale microservices architectures.
• Degree in Computer Science or a related field (or equivalent practical experience).

Nice to Have

• Understanding of enterprise development patterns
• Experienced with large-scale microservices architecture
• Experience with cloud providers (AWS, GCP, etc.)
• Active performance observation
• Gambling domain experience
• Understanding of application security and industry standards, its best practice
   

What We Offer

• Competitive Salary
• Quarterly Bonuses
• Unlimited Paid Time Off
• Unlimited Paid Sick Leave
• Remote & Flexible Working
• Private Medical Insurance
• Financial Support for Life Events
• Professional Development Budget
• International Exposure
• Regular Company Events

*Benefits may vary depending on location and contractual agreement
 

Recruitment Process

• HR interview
• Technical interview (with Live coding)
• Final interview

Please take into account that sometimes the process may differ, your TA Partner will keep you updated.

Шукаємо Node.js Developer для роботи над внутрішніми проєктами компанії.

Обов’язкові знання та навички:

— 1+ рік комерційного досвіду з Node.js
— комерційний досвід розробки REST API
— практичний досвід роботи з Express, NestJS і TypeScript
— практичний досвід роботи з PostgreSQL та GraphQL
— розуміння асинхронності: event loop, Promise, async/await
— досвід інтеграцій зі сторонніми API
— досвід роботи з мікросервісною архітектурою
— впевнене користування Git
— досвід роботи з Docker / Docker Compose
— базовий практичний досвід з AWS та CI/CD
— розуміння принципів production-розробки: логування, обробка помилок і стабільність систем
— англійська мова — B2

Ми пропонуємо:

— роботу над внутрішніми проєктами компанії
— участь у прийнятті технічних рішень
— віддалений формат роботи

Ми розглянемо ваше CV та зв’яжемося з вами, якщо ваш досвід відповідатиме вимогам вакансії.

Natife шукає Full Stack Developer із сильним комерційним досвідом у Node.js та React Native.

Ми шукаємо спеціаліста, який впевнено працює як із Back-end, так і з Front-end, має досвід запуску продуктів у Production та готовий брати участь у розвитку й підтримці довгострокового продукту.

Основні вимоги

Backend

• Комерційний досвід роботи з:
  • Node.js
  • TypeScript
  • NestJS
• Досвід розробки REST API.

Frontend

• React.js.
• Redux.
• React Native — обов'язковий комерційний досвід.

Бази даних

• PostgreSQL.
• MongoDB.
• Redis.

Обов'язково

• Наявність власного Mac (для розробки, запуску та тестування iOS/React Native застосунків).
• Досвід запуску продуктів у Production та їх подальшої підтримки.
• Досвід оцінки задач і роботи в Agile-командах.

Буде перевагою

• Досвід розробки під Smart TV:
  • Tizen OS;
  • webOS;
  • VIDAA.
• AWS.
• Docker.
• CI/CD.
• Firebase.
• Досвід роботи з продуктовою аналітикою.
• Практичний досвід інтеграції AI-рішень (OpenAI API, Claude, Gemini тощо).

Ми очікуємо, що ви

• Маєте сильний досвід Full Stack-розробки.
• Вмієте працювати як самостійно, так і в команді.
• Відповідально ставитеся до оцінки задач та дотримання дедлайнів.
• Маєте досвід підтримки продуктів після релізу.
• Швидко адаптуєтеся до нових технологій.
• Готові за потреби долучатися до овертаймів та робочих дзвінків після 18:00.

Soft Skills

• Відповідальність.
• Проактивність.
• Комунікабельність.
• Самостійність.
• Аналітичне мислення.
• Вміння працювати в команді.
• Орієнтація на результат.

Ми пропонуємо

• Повністю віддалений формат роботи.
• Довгострокову співпрацю.
• Роботу над цікавими продуктовими рішеннями.
• Професійну команду та можливість впливати на розвиток продукту.
• Використання сучасного технологічного стеку та можливість професійного розвитку.

Якщо вам цікаво працювати над сучасними веб- та мобільними продуктами й розвиватися разом із командою — будемо раді познайомитися!

Про проєкт

Високонавантажений betting-рушій із realtime-взаємодією: життєвий цикл раунду, розрахунок результатів і виплат, синхронізоване мовлення, захист від front-running. Основні виклики: латентність, консистентність, надійність під навантаженням.

Наш стек

Node.js, TypeScript, Express 5, PostgreSQL/Prisma, Redis, Kafka/KafkaJS, ClickHouse, WebSocket/Socket.IO, PostHog, Pino, Vitest, Docker

Обов'язки

• Розвивати betting-рушій на Node.js, TypeScript, Express 5: життєвий цикл раунду, розрахунок результатів і виплат, ідемпотентність операцій.
• Реалізовувати realtime-шар на WebSocket/Socket.IO із синхронізованою затримкою мовлення (bet-lock, захист від front-running).
• Будувати подієві пайплайни на Kafka/KafkaJS та антифрод-сховище на ClickHouse.
• Інтегрувати HLS-парсинг фідів (.m3u8) і сервіс комп'ютерного зору; реалізовувати provably-fair (commit-reveal).
• Працювати з PostgreSQL/Prisma та Redis (кеш, стан раундів, rate-limiting); налаштовувати observability (PostHog, Pino).
• Забезпечувати надійність: тести (Vitest), контейнеризація (Docker/Compose), відмовостійкість фідів (failover, авто-void).

Вимоги (must-have)

• 3+ роки бекенд-розробки на Node.js та TypeScript.
• Свіжий релевантний досвід в iGaming!
• Практичний досвід із realtime/WebSocket та високонавантаженими сервісами (латентність, конкурентність, консистентність).
• Впевнена робота з PostgreSQL та Redis; транзакції, ідемпотентність, стани гонки (race conditions).
• Досвід із брокерами повідомлень (Kafka або аналог) і подієвими пайплайнами.
• Розуміння надійності сервісів: логування, метрики, обробка збоїв, тестування.

Буде плюсом

• ClickHouse або інші аналітичні/колонкові БД; антифрод-логіка.
• Відеопотоки (HLS/RTMP), комп'ютерний зір, provably-fair/криптографія (HMAC).

Що пропонуємо

• Повна зайнятість (full-time).
• Умови за домовленістю.

Приєднуйся до Zeely AI як Senior Backend Developer та розвивай backend одного з найбільших AI-продуктів для бізнесів у США.

Zeely — AI Marketing Platform із 2M+ користувачів, яка допомагає бізнесам створювати AI-креативи та UGC-відео, запускати кампанії в Meta/TikTok і масштабувати маркетинг в одному продукті.

Наша backend-команда вже налічує 10+ інженерів і продовжує рости. Шукаємо сильного backend-first інженера, який працював із highload-системами, впливав на архітектуру та брав ownership за production-рішення.

З чим працюватимеш:

• backend-сервіси та REST API;
• PostgreSQL, Redis і data flows;
• мікросервісна архітектура;
• AWS, Docker, message brokers;
• зовнішні API та платіжні інтеграції;
• performance, reliability, debugging і code review;

• інтеграції з AI API та розвиток AI-функціональності продукту.

   

Що для нас важливо:

• 6+ років комерційного досвіду з Node.js;
• актуальний production-досвід із NestJS;
• сильний практичний досвід із PostgreSQL;
• мікросервіси та highload;
• Redis, AWS, Docker;
• message brokers і платіжні системи;
• досвід проєктування масштабованих і надійних систем;

• впевнене розуміння production ownership.

   

Буде плюсом:

• AI APIs;
• Terraform / Pulumi;
• AWS certification;
• backend для mobile + web;

• Upper-Intermediate English+.

   

Формат: remote-first, офіси у Варшаві та Києві.

Процес:
Intro Call → Test Task → Technical Interview → Final Interview → Reference Check → Offer

Надсилай резюме — будемо раді познайомитися 💚