Jobs Fullstack

About the project:

We are finalizing a Telehealth platform designed to bridge the gap between doctors and patients. Our goal is to provide a seamless, secure, and accessible medical experience. We are currently in the critical phase of preparing our web and mobile applications (iOS & Android) for the official live release.

We are looking for a skilled Full stack web developer with strong Kotlin expertise to help us polish the functionality, ensure stability, and successfully launch the product.

A new team member will be in charge of:

• Finalize and prepare the platform for a stable and secure production launch.
• Develop and maintain backend services using Kotlin and Spring Boot.
• Optimize database design, queries, and system performance.
• Translate business requirements into scalable, maintainable technical solutions.
• Ensure code quality and stability through testing and debugging.
• Collaborate with mobile, QA, and product teams to support release readiness.
• Support deployment and performance optimization in Azure (if applicable).
• Contribute to frontend improvements using JavaScript / daisyUI when needed.
•  

Does this relate to you?

• 3 years of experience with Kotlin, including coroutines, null safety, and idiomatic syntax.
• 2 years of experience building scalable backends with Spring Boot, including Security and Data JPA.
• 2 years of experience with JavaScript.
• Strong ability to design database schemas and write optimized queries.
• Strong ability to translate complex business requirements into maintainable technical solutions.
• Strong skill in identifying and fixing bottlenecks in memory and database performance.
• Commitment to high code quality through unit and integration testing.
• 3 years of experience with Azure would be a plus.
• Experience using the daisyUI would be a plus.
• English is Uppere-intermediate.

Our company is actively seeking a highly skilled and motivated Full-Stack Developer who is passionate about coding and eager to grow, to join our team.

     Your skill set:
 

• Strong knowledge of TypeScript
• Experience with React + Redux
• Backend expertise in Node.js + NestJS
• Working knowledge of PostgreSQL
• Understanding of RESTful APIs and using Postman
• Familiarity with Docker and AWS
• Experience with React Native, Firebase, Expo will be a plus
• Understanding of MonoRepo structure and workflows

• Comfortable with written and spoken English (Upper-Intermediate+)

   

  Responsibilities:
   

• Build and improve new features and modules
• Maintain and refactor existing codebase
• Integrate with third-party tools and services
• Work closely with PMs, QAs, architects & fellow devs
• Support deployments and participate in releases
  
  Benefits are discussed individually 

CareerOS is a B2B2C career platform serving 100+ top MBA programs worldwide - including Oxford, INSEAD, London Business School, Georgetown, and Notre Dame - along with 30+ employers. We help 500K+ users land jobs they love. We're a small, high-output team based in Barcelona, operating with American startup intensity - we ship fast, own our decisions, and push each other to do great work.

We work in small squads, each owning their own area of the product end-to-end.

We're looking for an Engineer who can work confidently across the full stack - React/TypeScript on the frontend, Node.js on the backend. You'll ship features end-to-end, make product decisions, and grow into a senior role with us.

What you'll actually do

You won't specialize in one corner. You'll build across the stack.

• Ship features end-to-end - From database to UI. You'll work across React/TypeScript and Node.js (with some legacy Go), owning features from start to finish.
• Make product decisions - See a confusing UX? Fix it. Have a better idea for an API design? Propose it and build it. We trust engineers to make smart calls on small-to-medium product decisions.
• Build with AI tools - We use AI coding tools daily (Claude Code, Cursor - team members pick what works for them). You should be comfortable (or excited) to work this way.
• Work directly with design - Implement pixel-perfect, responsive interfaces from Figma. Push back when something doesn't make sense.
• Own your code in production - We do continuous deployment. What you merge today is live today. You'll debug, monitor, and improve what you build.

What we're looking for

Must-haves:

• 3-5 years building production web applications, comfortable on both frontend and backend
• Strong React and TypeScript skills - You can build complex UIs confidently
• Backend experience with Node.js - You can write APIs, work with databases, and debug across the stack
• Solid SQL skills - You can write queries, understand schemas, and think about data
• Strong product intuition - You've shipped features where you made design and technical calls, not just followed tickets
• Excellent communication - You can articulate tradeoffs clearly, push back respectfully, and work well async
• Comfortable with ambiguity - Requirements will be fuzzy. You ask the right questions, make reasonable assumptions, and move forward without hand-holding
• Fluent English - We're a distributed team; clear written and verbal communication is essential

Strong signals:

• You've worked at an early-stage startup before (and liked it)
• You have side projects or open source contributions that show you build things because you're curious
• You've used AI coding tools and have opinions about them
• You care about craft - clean code, good abstractions, thoughtful UI details

What this role is NOT

Let's be honest about fit:

• ❌ Not a laid-back 9-to-5 - Startup doesn't mean less oversight and more flexibility. It means more ownership, higher stakes, and sometimes intense pushes. We respect personal time, but when we ship, we ship hard.
• ❌ Not highly structured - If you need detailed specs and clear roadmaps to function, this isn't the place.
• ❌ Not single-track - If you only want to do frontend or only backend, check out our other roles. This one requires range.

What you get

• Competitive salary + stock options (we'll discuss based on experience and location)
• Remote-friendly, with optional in-person time in Barcelona
• Small team where your work visibly matters - we have 500K+ users and real revenue
• Direct access to founders and fast decision-making
• Clear path to senior engineer as we scale from 5 to 10+ engineers

Insiders is a fast-growing IT company which employs about 200 people. Our company focused on providing innovative digital services and cutting-edge technologies to solve complex business challenges.

We are located in Lviv and currently work in an office format. For candidates from other cities, we offer relocation (an apartment located near the office, this option is free).

What we expect from the candidate:

•Solid understanding and ability to the practical application of HTML/CSS, JavaScript and TypeScript. 

•Proofed experience in Node.js with Express.js and Nest.js frameworks.

 •Knowledge of MySQL, PostgreSQL, MongoDB and Redis.

•Deep knowledge and understanding of networking - REST API standards, HTTP/HTTPS methods. 

•Solid understanding of React/Next.js. 

•Experience with Git. 

what we offer:

- free study in our Corporate English Academy

- growth and development opportunities for young developers even if you have no commercial experience

- regular salary review (after the completion of each contract)

- provision of Apple equipment

- comfortable office with all amenities not far from the center (uninterrupted internet, generator, tea and coffee, pastries).

- timely payment of salaries.

- corporate events, teambuildings, etc.

- working on projects side by side with Senior developers, which will give you the opportunity to learn and develop.

We are looking for a skilled Full-Stack Engineer with strong expertise in React, TypeScript, and React Native to join our growing team. In this role, you will be responsible for building and delivering high-quality features across web and mobile platforms, collaborating closely with product and design teams, and contributing to backend development with Node.js.

You will have the opportunity to work on impactful projects, take ownership of features end-to-end, and help shape the technical direction of the product.

Requirements:
 

• 4+ years of hands-on experience with React and TypeScript, building scalable and maintainable front-end applications.
• Solid production experience with React Native, delivering high-quality mobile applications.
• Strong background in Node.js backend development, including building APIs and server-side logic.
• Experience working with relational and/or NoSQL databases, with a good understanding of data modeling and performance optimization.
• Proven ability to take ownership and deliver features end-to-end, from architecture and implementation to testing and deployment.
   

What we offer:
 

• Remote working format
• Flexible working hours
• Informal and friendly atmosphere
• The ability to focus on your work: a lack of bureaucracy and micromanagement
• 20 paid vacation days
• 7 paid sick leaves
• Education reimbursement
• Free English classes
• Psychologist consultations

• Recruitment process:

   

  Recruitment interview – Technical Interview – Client Interview

About the Company

We are a lead generation company operating in the iGaming industry since 2012. Our mission is to deliver high-quality data and trustworthy information to players through comprehensive one-stop portals, enhancing their betting experience.

Our team consists of industry experts who make this possible. We are dedicated to creating a positive and engaging work environment that promotes growth, collaboration, and high performance.

About the Role

We are seeking a highly experienced Senior Web Developer with strong expertise in Laravel, PHP, WordPress, and database management.

The primary focus of this role is backend development, including building and maintaining scalable web applications, RESTful APIs, and custom WordPress solutions with Gutenberg block development. A solid understanding of database optimization, complex queries, and migrations is essential to ensure efficient data processing.

Key Responsibilities

• Design, develop, and maintain backend systems using Laravel and PHP
• Build custom WordPress solutions with a focus on backend logic and Gutenberg block development
• Develop and integrate APIs for communication between internal systems and third-party services
• Optimize database queries and manage migrations (MySQL, PostgreSQL) to ensure efficient data handling
• Ensure high performance and scalability of backend services
• Troubleshoot and resolve complex backend issues while ensuring smooth front-end integration
• Collaborate closely with front-end developers and DevOps teams to deliver high-quality solutions
• Maintain strong code quality standards through code reviews, unit testing, and adherence to best practices

Requirements

• 8+ years of backend development experience using Laravel and PHP
• Strong experience in WordPress backend development, including custom plugins and Gutenberg block creation
• Experience with ReactJS (particularly for Gutenberg block development)
• Solid expertise in designing and integrating RESTful APIs
• Strong knowledge of database management, including schema design, migrations, and query optimization (MySQL, PostgreSQL)
• Proficiency with version control systems such as Git (GitHub, Bitbucket)
• Good understanding of backend best practices related to security, performance, and scalability
• Experience with server environments, deployment, and maintenance
• Ability to work effectively in an Agile/Scrum environment and manage multiple tasks simultaneously
• Strong analytical skills, attention to detail, and a proactive mindset
• Experience working with CI/CD pipelines and automation processes

Nice to Have

• Basic knowledge of frontend technologies (HTML, CSS, JavaScript) to enhance collaboration with front-end teams
• Experience with Docker or other containerization tools
• Familiarity with cloud platforms such as AWS, Azure, or Google Cloud
• Previous experience in the iGaming industry, especially within sports betting

We are looking for a motivated and enthusiastic Trainee/Junior Full-Stack React & Node.js developer to join our dynamic team. This position is suitable for candidates starting their software development journey, who want to grow both in frontend and backend engineering and gain real experience working with international projects.

Responsibilities

-  Adaptation of solutions according to customer requirements.

-  Front-End development using React.js.

-  Back-End development using Node.js.

-  Follow a structured learning plan and continuously improve core competencies.

-  Participate in hands-on sessions and apply learned concepts to real project tasks.

-  Actively communicate with mentors and senior developers, discussing progress and technical challenges.

Requirements

- Understanding of Progressive Web Apps and Accelerated Mobile Pages.

- Familiarity with Jenkins, Jira, Confluence, Bitbucket.

-  Experience with some of the following: CSS-preprocessors (LESS, SASS), Docker, WebSockets, MQTT.

-  Frontend development experience using React.js.

-  Experience with backend development.

-  Experience developing web-based software products using Node.js.

-  Experience with several of the following: NPM, Webpack, Yarn, TypeScript, JavaScript, SPA, MongoDB.

-  Experience with Git.

-  Skills with reusable components.

-  Skills with automated testing and performance testing.

-  Knowledge of JS architecture practices.

-  Understanding of OOP and SOLID principles.

-  Understanding of web development paradigms (RESTful APIs, pub/sub, security).

- Experience with building performant and scalable applications.

-  Good spoken English.

Would be a plus

-  Understanding of Progressive Web Apps and Accelerated Mobile Pages.

-  Familiarity with Jenkins, Jira, Confluence, Bitbucket.

-  Experience with: LESS, SASS, Docker, WebSockets, MQTT. 

Working conditions

-  Full remote internship with international projects

-  Real conditions for special personal growth and development

-  Friendly and high skilled team with a huge commercial background

-  Training at the company expense with a mentors

-  Open process for the adapting to the client requirements and interviews

-  Permanent improvements personal qualities and skill 

Internship opportunity

We are also ready to take an intern without experience, with spoken English.
There is a possibility of remote internship and training with further employment.

Skills

• Commercial experience in software development projects
• Working experience with Next.js, React, Tailwind, PostgreSQL, Prisma
• Strong knowledge of JavaScript, Data Algorithms and Structures
• Hard-working, smart, proactive, goal oriented, open in communication, not afraid to voice your own opinion
• Willing to take part in business and design decisions and analysis
• Experience with Python - preferable
   

Do not hesitate to apply if you are missing specific experience.

We Offer

• WFH and flexible working hours

Requirements

• Develop new features and improve existing ones for Valid-X 's products.

• Proactively take part in design and marketing discussions, take responsibility for products from the technology side.

   

Project description

• Social wiki platform website 
• Tech stack: Next.js, Node.js, PostgreSQL, Prisma, Vercel

• Other projects

   

About the Product:

We are building an AI productivity assistant for a casual audience.

The product is simple and easy to use (good UX), but technically complex. 
It includes:

• High traffic load
• High performance & fast loading
• AI integrations
• Paid traffic and scalable landing pages

Why We Are Looking for This Person?

We already have a strong technical leader in the team.

Now we are looking for a Full-Stack Developer with a strong frontend focus who will help us:

• Launch MVP on time
• Take ownership of features and integrations
• Be a reliable partner in the team, not just someone who closes tickets

Main Tasks (First 3–6 Months)

• Develop and improve the web product (AI Productivity Assistant)
• Integrate payment systems
• Integrate product analytics
• Prepare web pages for paid traffic

Requirements (Must-Have)

• 2–4+ years of commercial experience in full-stack development
• Strong React + TypeScript. Experience with component architecture, shared types, and data validation
• Backend development with Bun runtime. Building stateless and horizontally scalable APIs using Hono
• Database & Auth: Supabase (Postgres). Designing database schema, setting up RLS policies, working with JWT or session-based authentication
• Redis & Caching. Rate limiting, session storage, atomic operations
• AI integrations. Experience with Vercel AI SDK, streaming responses, and LLM context management
• English level: able to read documentation and communicate in writing
• Independent, responsible, proactive

Nice to Have

• Experience with B2C or subscription products
• Experience with paid traffic and landing pages
• Experience with AI / LLM integrations (even basic)
• Startup or outsource experience with ownership mindset
• Experience with analytics, payment systems, A/B testing

Why It’s Great to Work With Us

• New product without legacy code
• Real impact on product and decisions
• Minimum bureaucracy
• Responsibility and trust
• Opportunity to grow into a Tech Lead or Owner role

Conditions

• B2B cooperation
• Fully official payments
• Paid vacation and sick leave
• Remote work (EU timezone)

A platform that connects to data from every possible source and lets you interact with it through multiple interfaces - knowledge bases, APIs, hardware, and robotics. We are looking for a specialist to join our team:

General:

• Experience: 3+ years of commercial development.

Core Stack:

• Frontend: Next.js, React, TypeScript, Tailwind CSS.
• Backend: Node.js, Express, PostgreSQL.
• Infrastructure: AWS (повний цикл: від роботи з SDK до деплою/сервісів).

Specialized Knowledge:

• AI/LLM Integration: Досвід роботи з моделями, обробка промптів та стрімінг відповідей.
• High-Performance Widgets: Розробка легких JS-скриптів для вбудовування на сторонні сайти (Native TS/CSS, esbuild).
• Observability: Робота з системами логування та моніторингу помилок (Sentry).
• English: Intermediate+ 

Who are we looking for?

We are looking for a developer who is ready to join our team and start working together on our projects.

Tasks?

Your tasks will focus on the skills and expectations listed below and the use of new approaches and technologies.

Why did the job open?

We want to invite a new specialist to the company's staff due to the increase in the number of projects.

Requirements:

• B2 English (Upper-Intermediate);
• At least 4+ years of commercial experience with JavaScript;
• At least 3+ years of commercial experience with Node.js;
• At least 2+ years of commercial experience with React.js;
• Experience with TypeScript and Nest.js;
• Experience working with meta-frameworks over React (e.g., Next.js, Remix);
• Experience with RDBMS and NoSQL databases;
• Experience with implementing automated testing platforms and unit tests;
• Experience with REST;
• Experience with Redux/Mobx or other state management libraries;
• Familiarity with modern interface pipelines and assembly tools;
• Ability to communicate well with process participants and team members related to business;
• Experience in integrating with external APIs;
• Solid understanding of object-oriented and functional programming;
  Flexibility and ability to adapt to changes;
• Ability to work closely with Product Managers and Engineering Team-members;
• Experience working with message brokers such as RabbitMQ, SQS, or NATS;
• Understanding and practical knowledge of Secure Software Development Life Cycle (SSDLC) principles;
• Experience building AI-powered solutions;
• Knowledge of observability and monitoring practices, including implementation of metrics, logs, and traces based on industry best practices.
   

Good to have:

• Experience with DevOps;
• Experience with cloud services such as AWS, GCP or Azure;
• Experience with CI/CD processes;
• Experience with Unit/E2E testing;
• Understanding of design and architecture principles;
• Experience with Infrastructure as Code (IaC);
• Experience with solution and system architecture;
• Experience using AI tools to enhance productivity;
• Experience building advanced AI agents;
• Familiarity with emerging protocols and specifications for AI agent systems, such as MCP, A2A, and AG-UI.

Who are we looking for?

We are looking for an "independent fighting unit" who is ready to join our Team and start working together on our projects immediately or after training.

Tasks?

Your tasks will focus on the skills and expectations listed below and the use of new approaches and technologies.

Why did the job open?

We want to invite a new specialist to the company's staff due to the increase in the number of projects and the opening of a branch.

Requirements:

• B2 English (Upper-Intermediate)
• At least 3+ years of commercial experience with JavaScript;
• At least 2+ years of commercial experience with Node.js;
• At least 2+ years of commercial experience with React.js;
• Experience with Typescript, Nest.js;
• Experience with RDBMS and NoSQL databases;
• Experience with implementing automated testing platforms and unit tests;
• Experience with REST;
• Experience with Redux/Mobx or other state management libraries;
• Familiarity with modern interface pipelines and assembly tools;
• Ability to communicate well with process participants and team members related to business;
• Experience in integrating with external APIs;
• SOLID understanding of object-oriented and functional programming
• Flexibility and ability to adapt to changes;
• Ability to work closely with Product Managers and Engineering Team-members.

Good to have:

• Experience with DevOps;
• Experience with cloud services such as AWS, GCP or Azure;
• Experience with CI/CD processes;
• Experience with Unit/E2E testing;
• Understanding design, and architecture principles;
• Experience with message brokers, like RabbitMQ, SQS, etc;
• Experience with Infrastructure as code (IaC).

EXPERIENCE AND SKILLS REQUIRED:

3+ years of commercial software development experience;
Strong experience with ASP.NET MVC and .NET Framework 4.8.1;
Experience working with microservices-based architectures;
Solid knowledge of SQL Server and query optimization;
Experience with Azure services, including Azure IoT Hub;
Strong debugging and problem-solving skills across back-end and front-end;
Experience with Angular (15–19), TypeScript, and RxJS;
Proficiency in JavaScript, CSS/SCSS;
Experience with jQuery and classic MVC front-end;
Ability to design UI and build prototypes;
Solid knowledge of Git and command-line tools;
Comfortable with quarterly releases, bug-fix and fast-follow releases;
Strong analytical thinking and ability to see the big picture;
Good communication skills and ability to collaborate in a full-stack team;
Ability to work independently, handle multiple tasks, and meet deadlines.

Nice to have:
Angular Material, PWA, NgRx;
Custom component libraries and performance optimization;
Experience with Atlassian tools (Jira, Bitbucket, Confluence);
Knowledge of the parking industry.

The position is open due to the emergence of new projects!

Job Description

As a Fullstack Infrastructure Engineer in the Frontend Guild, you will build the core engines that power development at Wix. Your work will be used by every frontend engineer to ship faster and with higher quality. You’ll own projects end to end, from idea to production, at massive scale.

What You’ll Do: 

• Architect and build internal tools to improve developer velocity and code quality 
• Own infrastructure solutions such as production testing and performance tooling
• Take projects from ideation through design, implementation, and production
• Use AI daily for coding, testing, design, and technical decisions
• Work with modern full-stack technologies and industry-leading tools 
• Collaborate closely with experienced engineers on high-impact projects 

• Influence the developer experience across the company

   

At Wix, we’re all about the flexibility of a hybrid setup — giving you the option to collaborate in the office when needed while also staying connected remotely.
We’re looking for Ukraine-based talents who can balance their time between in-office and remote engagement with the Wix team. This approach gives you the best of both worlds: flexibility of remote with the added benefit of in-person collaboration when it matters

Requirements

• 4+ years of frontend development experience 
• Deep expertise in TypeScript, React, and modern build tools (Vite, Next.js, SWC/ESBuild).
• Solid understanding of backend systems (Node.js preferred), including APIs and data flows
• Hands-on use of AI tools in daily development
• Professional-level English communication skills
• End-to-end product development experience (frontend, backend, cloud) is a plus

About the Team

We’re part of Wix’s Frontend Engineering (FED) Guild, serving as the Infrastructure group that empowers every frontend developer at Wix to move faster and deliver higher-quality code. Our mission is to design and maintain impactful tools that boost developer velocity, code quality, and performance.Our team is made up of exceptional developers, passionate engineers, and creative problem-solvers. You’ll work on developer-focused infrastructure - from scalable testing platforms and performance optimization tools to standardization frameworks and AI-driven solutions like automated code migrations and intelligent project bootstrapping.

About Wix

Wix makes it possible for anyone to succeed online. 

Since 2006, we've grown to around 5,300 employees in 22 countries, launched over 40 products, and serve over 299 million users and their visitors worldwide. 

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

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

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

Working Style & Expectations

We are looking for committed, highly motivated professionals who take ownership seriously. This role requires consistent collaboration during U.S. Eastern Time business hours, reliability in scheduling, and strong follow-through. Being on time, prepared, and diligent is essential — this is a senior role on a system that underpins real operations, not an experimental project.

We value people who are excited by hard problems, communicate clearly, and treat commitments as non-negotiable.

1. AI/ML Developer Model Training & Fine Tuning

2. Data Model & Architect

3. Developers Microservices / API  ETL & Integration developement

We are building an end-to-end system that turns unknown physical parts into known, sellable products — automatically. The system ingests parts through vision and sensors, resolves identity using AI and structured knowledge, and publishes those parts into a fully integrated commerce, logistics, and search ecosystem.

This is not a research role. It is a production systems role spanning computer vision, large-scale data ingestion, retrieval systems, cloud infrastructure, and e-commerce integration.

What you will build

• A learning ingestion pipeline that identifies unknown physical parts using images, 3D data, and metadata, and improves continuously through human confirmation
• Vision and retrieval systems using multimodal embeddings and vector search to match parts across large catalogs
• A RAG-based knowledge system that ingests, parses, and normalizes manufacturer PDFs, schematics, and parts manuals into APIs
• Event-driven services that publish identified parts into inventory, commerce, shipping, and ERP workflows
• Search-optimized part representations engineered to be discoverable by Google, analytics systems, and downstream AI models

Why this is hard — and interesting

• Parts are visually similar, worn, incomplete, and inconsistent across manufacturers
• Manufacturer data is fragmented, unstructured, and often only available as PDFs and diagrams
• The system must operate across perception, inference, search, commerce, and logistics — not just ML
• Identification must be probabilistic, explainable, and correctable, while downstream systems require deterministic truth
• The platform must learn continuously without breaking accounting, inventory, or customer trust

This is a real-world intelligence problem, not a model-training exercise.

Technical environment

• Google Cloud Platform (Cloud Run, Compute Engine, GPU instances, Cloud Storage)
• MongoDB Atlas for operational and catalog data
• Vector search and retrieval systems for embeddings and similarity matching
• Event-driven and API-first architecture
• Computer vision, multimodal embeddings, and RAG pipelines in production

Required experience

• Senior-level experience building production AI or data-driven systems end-to-end
• Strong background in computer vision, retrieval systems, or multimodal ML
• Experience designing cloud-native systems on GCP or similar platforms
• Deep Python expertise; comfort owning architecture and trade-offs
• Ability to connect ML outputs to real business systems (commerce, ERP, logistics)

What success looks like

• Unknown parts can be ingested, identified, and published without manual data entry
• Manufacturer documents become structured, queryable knowledge
• Identified parts flow cleanly into e-commerce, search, and fulfillment systems
• The system improves over time without increasing operational risk