Jobs Fullstack

We're building an innovative AI-powered learning platform that leverages cutting-edge technologies to transform the educational experience. This is a greenfield project where you'll have the opportunity to shape the architecture and technical direction from the ground up.
 

Required Technical Skills:

- Leveraging AI APIs, vector search, RAG
- Frontend Technologies (Vue, Typescript, Javascript, React)
- Backend Technologies (Python)
- Database Management (Postgres, SQL, NoSQL)
- Understands API integrations and backend design patterns (e.g.,  email providers)
-Architecture thinking

🚀 Junior Node.js / React Developer (with growth potential)

Looking for a project where you can dive into complex architecture, work with a modern stack, and actually influence technical decisions?
You’ve just found it. 👀
 

🔧 About the project

We’re building a platform with a deeply integrated architecture based on PostgreSQL (RLS + triggers), GraphQL + PostGraphile, Graphile Worker, React, Node.js, AWS, and Hugo.
This isn’t just about shipping “features” — you’ll be solving real architectural challenges that will help you grow technically and professionally.
 

💡 Our values

• Continuous growth and active involvement
• Responsibility and initiative
• A flexible, problem-solving mindset
   

✨ What we offer

• Work on a project with serious architectural depth
• Real influence on technical decisions
• Fully remote work format
• A team of professionals who are always ready to share experience and help you grow
   

📌 Your responsibilities

• Develop and maintain features using Node.js (Express) and Workers
• Work with PostgreSQL (RLS, triggers)
• Integrate GraphQL APIs (PostGraphile, Apollo Client)
• Take part in architectural discussions and solution design
   

✅ What we expect from you

• 0.5+ years of experience with Node.js, React, Express
• Experience working with PostgreSQL (RLS, triggers — a big plus)
• Understanding of backend architecture and security models
• Experience with AWS (S3, CloudFront) is a plus
• English level: B2 or higher
   

🛠 Our tech stack

Node.js, Express, Workers
React, Next.js
PostgreSQL (RLS, triggers)
GraphQL, PostGraphile, Graphile Worker
Apollo Client, GraphQL Code Generator
AWS (S3, CloudFront)
Keycloak
 

💬 Tools we use

• Slack — communication
• Asana — task management

SBC Performance is a digital marketing and ad-tech ecosystem partnering with the world’s top ad platforms to drive performance. We help brands scale globally through high-converting creative marketing solutions and smart campaign optimization. We’re proud to be elite partners with TikTok (Top 1 globally), Meta (Top 10), and Google.

With a team of 250+ professionals across the U.S., the Czech Republic, Poland, Ukraine, and more, we are building a fast-moving, data-first performance culture.

Now, we’re looking for a Full Stack Engineer to join our AdTech product team.  Someone passionate about building scalable, data-driven systems that power performance marketing automation and analytics.

Key Responsibilities:

• Design, build, and maintain frontend and backend services for the internal AdTech platform.
• Develop Angular (v12+) applications with TypeScript, using reactive patterns (RxJS, Angular Material, reactive forms).
• Implement and optimize state management and change detection for high-performance UI.
• Build and maintain Node.js microservices with TypeScript and RESTful APIs.
• Work with PostgreSQL (TypeORM) and Firestore (NoSQL) for data modeling and storage.
• Implement asynchronous patterns, error handling, and background data processing.
• Integrate with Google Cloud Platform (GCP): Cloud Functions, Firestore, Cloud Storage, and Secret Manager.
• Utilize Redis caching, message queues (RabbitMQ / Pub/Sub), and efficient pagination/filtering for large datasets.
• Collaborate with product, analytics, and QA teams to deliver robust, scalable AdTech solutions.

Requirements:

• 3+ years of experience as a Full Stack Engineer 
• Experience with Node.js, Angular (v12+), and TypeScript in production environments
• Strong knowledge of RxJS, Angular Material, and reactive forms
• Experience with state management and change detection optimization
• Experience with microservices architecture and RESTful APIs
• Proficiency with PostgreSQL (TypeORM) and Firestore (NoSQL)
• Understanding of asynchronous patterns and error handling
• Experience deploying and managing Cloud Functions (triggers, logs, monitoring)
• Knowledge of Firestore queries, indexing, and data modeling
• Familiarity with Cloud Storage and Secret Manager
• Docker basics for local development and testing
• Experience with message queues (RabbitMQ or Pub/Sub)
• Redis caching and session management
• Handling large datasets (pagination, filtering, sorting)

Nice to Have

• Experience with ad platform APIs (TikTok Business API, Facebook Graph API, Google Ads API)
• Working knowledge of BigQuery for analytics and data aggregation
• Experience building worker pools and parallel processing pipelines
• Familiarity with CI/CD pipelines and deployment automation
• Understanding of AdTech concepts — campaigns, budgets, pixels, conversions
• Experience with high-volume, real-time data systems

What We Offer:

 

• Hybrid job in Prague
• Competitive compensation
• Flexible working hours: we start our operation day between 9:00 — 11:00 CET
• All necessary equipment
• Paid vacation and sick leaves
• Educational support: reimbursement of certification, training, and a knowledge-sharing atmosphere
• Company events and multiple internal activities
• Open feedback and transparent direct communication

Privacy Notice: https://sbc-performance.com/notice-privacy-for-recruitment/

Inception-1 is a product company that creates AI-driven B2C products designed to help people feel more connected and less alone. Our mission is to build meaningful digital experiences that blend technology with empathy — and to prove that technology can be both human and transformative.

We’re building a MarTech engineering team that ships the tooling and integrations our Marketing org needs to grow multiple AI products. You’ll own delivery for a cross-functional squad, spending ~50% on hands-on coding and ~50% on team leadership and delivery management.

What you’ll do
 

• Own end-to-end delivery for the MarTech squad: planning, execution, quality, and timely releases.
• Lead implementation of growth funnels: tracking plans, event schemas, attribution, and conversion flows.
• Build and maintain integrations with ad platforms (Meta, TikTok, Google, Snapchat): pixels/SDKs, CAPI/server-to-server, event mapping, deduplication, rate limits, and privacy settings.
• Set up and harden analytics & tagging (e.g., GTM, GA4; mobile/web tracking; data hygiene).
• Partner with Payments engineers to instrument purchase events, subscriptions, and refund flows; support troubleshooting across environments.
• Develop tools for the marketing team that help them increase speed and automate their workflows.
• Raise engineering bar: code reviews, incident playbooks, delivery rituals, and pragmatic CI/CD.
• Hire, coach, and performance-manage engineers; provide clear feedback and growth paths.
• Collaborate daily with Marketing Managers, Product, Design, QA, and DevOps to hit growth targets.

Tech snapshot
 

• Frontend: React (mandatory), TypeScript; React Native is a strong plus.
• Backend: any modern stack; .NET experience is a big plus (willingness to dive into backend is required).
• Growth tooling: GTM/GA4 (or similar), pixel/SDK/CAPI setups, attribution (e.g., AppsFlyer/Adjust), event quality scoring in ad platforms.
• Practices: automated tests, safe rollouts, feature flags, trunk based development, continuous delivery.

What you bring
 

• 6+ years in software engineering, including 1–3 years leading people or acting as a de-facto lead.
• Strong React engineer who is comfortable across the stack and curious about backend internals.
• Proven experience shipping ad/analytics integrations at scale (Meta/TikTok/Google/Snapchat).
• Product thinking: you care about business impact, not just code.
• Excellent communication; comfortable working with imperfect requirements and turning them into plans.

Why this is interesting
 

• Greenfield chance to set engineering practices from scratch in MarTech.
• Impact across multiple fast-growing AI products (mobile + web).
• Mix of product engineering and growth engineering — ship features that move the business weekly.
• Smart, hands-on leadership team; quick decisions; minimal bureaucracy.

We are looking for a Full Stack Engineer to join our growing team.

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, Node.js, and many others.

Requirements:

- 3 years of commercial experience in web development.
- Solid hands-on experience with React and modern frontend practices.
- Strong backend development skills with Node.js, preferably using NestJS (or Express).
- Good understanding of TypeScript in production environments.
- Solid experience working with PostgreSQL.
- Practical knowledge of Prisma ORM (migrations, relations, transactions).
- English - Intermediate or higher.

Responsibilities:

- Develop and maintain modern web applications using React and Node.js (NestJS/Express).
- Collaborate with the team to design, develop, and deliver new features.
- Participate in team and client communications.
- Contribute to estimates and technical planning of new projects.
- Assist in solving technical challenges on active projects.
- Participate in shaping the engineering setup for new initiatives.

Would be a plus:
- Experience with Redis, MongoDB, or Elasticsearch.
- Familiarity with Docker and basic DevOps practices.
- Experience with RabbitMQ, Kafka, or similar messaging systems.
- Understanding of architectural patterns like Clean Architecture or modular monoliths.
- Experience working with Next.js and Material UI (MUI).

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.

The Role

We are seeking a Senior Full Stack Developer with a strong background in developing and maintaining both frontend and backend services. The ideal candidate will have extensive experience with Nest.js and React.js/Nest.js, along with a proven track record of building scalable and efficient web applications. This role will focus on developing and enhancing Smart Alerts, our flagship alerting tool, and requires a deep understanding of full-stack development, database management, including both SQL and NoSQL databases, and modern software development practices.

Key Responsibilities:

• Develop and maintain the frontend and backend of the Smart Alerts tool using React.js and Nest.js.
• Ensure seamless integration between frontend and backend components, optimising for performance, scalability, and user experience.
• Conduct code reviews, optimise performance, and ensure adherence to the best security practices across the entire stack.
• Mentor junior developers and contribute to the continuous improvement of the development process.
• Implement and maintain containerisation solutions using Docker.
• Apply Agile and Scrum methodologies to ensure efficient project management and timely delivery.
• Troubleshoot and resolve complex technical issues related to both frontend and backend services.
• Collaborate with product managers, UX/UI designers, DevOps engineers, and other team members.
• Design and implement robust and scalable database solutions using MySQL/MariaDB, and NoSQL databases like MongoDB.

Requirements:

• At least 5 years of experience in full-stack development with a focus on Nest.js and Node.js.
• Experience with Redis, MySQL, and/or PostgreSQL, including complex query optimization and database design.
• Deep experience with Next.js and React in high-frequency transaction environments, including RESTful API design and development.
• Strong knowledge of frontend technologies, including HTML, CSS, JavaScript, etc.
• Strong knowledge of queuing systems such as RabbitMQ and Kafka.
• Understanding of Domain-Driven Design (DDD), Hexagonal Architecture, Clean Architecture, CQRS, and Event-Driven Architecture (Intermediate level).
• Frameworks & Libraries, NestJS (Express-based) for scalable backend applications.
• Database & ORM, Experience with Kysely, Knex, or similar query builders.
• Experience with Monorepo Management like NX, pnpm workspaces, or similar tooling.
• Proficiency in Unit Testing & End-to-End Testing (Intermediate level).
• Strong understanding of software development methodologies, such as Agile and Scrum.
• Excellent communication and collaboration skills.
• Excellent problem-solving skills and the ability to work in a fast-paced environment.
• Good grasp of containerisation principles and experience with Docker.
• Familiarity with RESTful API design and development, as well as GraphQL, Protobuf, and Flatbuffer.
• Understanding of Schema Validation, Familiarity with Ajv, Typebox, Zod, or equivalent libraries.
• TypeScript for robust and maintainable code.
• Knowledge of Package Managers – Experience with npm, pnpm, yarn, etc.

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, Spain and Serbia by storm. Our BRO team consists of 1,500 bright minds creating innovative ideas and products. We don’t follow formats. We shape them. We build what works, launch it fast, and make sure it hits.

We’re looking for a Senior Full Stack Developer with experience in Node.js and React (80% Backend & 20% Frontend) to join our development team in Lisbon, Portugal. You’ll help build a next-generation payment integration platform that connects businesses with multiple financial service providers through scalable, secure APIs.

✅ Responsibilities:

✔️ Design, implement, and optimize robust solutions to enhance our proprietary payments platform, ensuring high performance, scalability, and security.
✔️ Develop and maintain complex integrations with payment providers, banks, and other third-party systems, ensuring seamless data flow and alignment with technical and regulatory requirements.
✔️ Actively participate in all stages of creating new features, from initial concept and technical design to implementation and final delivery.
✔️ Contribute to the development and ongoing evolution of our fintech payments solution, ensuring innovation and adaptability to market needs.
✔️ Collaborate in agile development cycles with bi-weekly sprints, utilizing practices such as SCRUM, grooming, and sprint planning to consistently deliver product value.
✔️ Identify opportunities for technical and process improvements, driving efficiency and innovation throughout the software lifecycle.
✔️ Work closely with design, product, and business teams to ensure features meet user expectations and support business objectives.

✅ Requirements:

✔️ 5+ years of commercial experience in web development.
✔️ 3+ years of hands-on experience with Node.js.
✔️ 3+ years of frontend development experience using React.
✔️ Solid experience with NextJS, NestJS, Apollo, and Material UI.
✔️ Strong proficiency in TypeScript.
✔️ Commercial experience working with high-load SQL or NoSQL databases.
✔️ Familiar with REST, GraphQL, and WebSockets.
✔️ Understanding of TDD and writing effective automated tests.
✔️ Experience with microservice architecture principles.
✔️ Proficient with Git version control workflows.
✔️ Hands-on experience with RabbitMQ and Redis.
✔️ Experience with MongoDB and MySQL.
✔️ Advanced level of English, both written and spoken.

✅ We offer excellent benefits, including but not limited to:
🧑🏻‍💻 Learning and development opportunities and interesting, challenging tasks. 
✈️ Relocation package (tickets, staying in a hotel for 2 weeks). 
🏋️‍♂️ Company fitness corner in the office for employees. 
📚 Opportunity to develop language skills and partial compensation for the cost of language classes. 
🎁 Birthday celebration present. 
🏝 Time for proper rest and 24 working days of Annual Vacation. 

Bold moves start here. Make yours. Apply today! 

We're looking for an experienced Team Lead Developer with strong technical expertise in Node.js & React and a solid background in leadership, to join our growing fintech development team in Lisbon, Portugal. You will lead a cross-functional team working on a payment integration platform, contributing directly to architecture, delivery, and team growth.

✅ Responsibilities:
✔️ Being transparent with the team about challenges, failures, and successes.
✔️ Hiring and training technical personnel.
✔️ Determining project requirements and developing work schedules for the team.
✔️ Delegating tasks and achieving daily, weekly, and monthly goals.
✔️ Liaising with team members and management to ensure projects are completed to standard.
✔️ Motivating staff and creating a space where they can ask questions and voice their concerns.
✔️ Delegating work and assignments to team members.
✔️ Collaborating with their team to identify and fix technical problems.
✔️ Lead the development of our in-house fintech platform with a focus on performance, scalability, and security.
✔️ Build and manage complex payment API integrations with banks, PSPs, and third-party services.
✔️ Contribute to full-stack development, ensuring consistency and stability across the product.
✔️ Actively participate in developing new features from concept to production.
✔️ Collaborate with product managers, designers, and stakeholders in agile workflows to ensure technical feasibility and business alignment.
✔️ Support the evolution of the architecture towards modern patterns (microservices, messaging systems, and scalable infrastructure).

✅ Requirements:
✔️ At least 8+ years of professional experience in the IT field.
✔️ 3+ years of experience in leadership positions.
✔️ 3+ years of commercial experience with Node.js & React.
✔️ 5+ years of commercial experience in web development.
✔️ Knowledge of JavaScript and the ECMAScript 6 standards.
✔️ Commercial experience in implementing REST and WebSockets.
✔️ Experience with Git version control system.
✔️ Experience with commercial databases, MySQL.
✔️ Experience with RabbitMQ.
✔️ Experience with Redis.
✔️ B2 level of English.
✔️ Excellent technical, diagnostic, and troubleshooting skills.
✔️ Strong leadership and organizational abilities.

✅ We offer excellent benefits, including but not limited to:
🧑🏻‍💻 Learning and development opportunities and interesting, challenging tasks.  
✈️ Relocation package (tickets, staying in a hotel for 2 weeks). 
🏋️‍♂️ Company fitness corner in the office for employees. 
📚 Opportunity to develop language skills and partial compensation for the cost of language classes. 
🎁 Birthday celebration present. 
🏝 Time for proper rest and 24 working days of Annual Vacation. 
🍲 Breakfasts and lunches in the office (partially paid by the company).

Responsibilities

• 3+ years of professional experience in software development
• Strong experience with Java & Spring Boot
• Strong experience with React & TypeScript
• Good understanding of REST APIs and client-server architecture
• Experience working with SQL & NoSQL databases

• Ability to work independently and take ownership of features

   

Languages:

Upper-Intermediate or higher English level - both written and spoken.

About project:

This is a product company revolutionizing the Health Care industry in the US by providing innovative solutions to improve medical services. The project helps patients centralize all aspects of their treatment, ensuring timely recommendations and engagement that lead to better health outcomes. Additionally, Navierre supports healthcare providers by offering technologies and services that streamline and enhance the care delivery model, enabling superior treatment results.

MUST-HAVE
 

Experience

• 6+ years of commercial software development experience.
• Strong track record as a Senior Full-Stack engineer delivering complex web solutions.

Backend (.NET)

• Advanced knowledge of C#, .NET CORE.
• Strong experience with ASP.NET Core MVC / WebAPI, EF Core, LINQ.
• Confident with REST principles (versioning, error handling, pagination/filtering, idempotency).
• Experience with Swagger/OpenAPI and contract-driven development.

Frontend (Blazor + Angular)

• Production experience with Angular (v12+ ideally):
  • TypeScript, RxJS, component architecture, routing, forms/validation
  • State management patterns (services, RxJS, optionally NgRx)
  • API integration, error handling, and performance basics
• Production experience with Blazor:
  • Components, state management, forms/validation, routing
  • Practical JavaScript interop when needed
• Solid web fundamentals: HTML/CSS, browser behavior, HTTP basics, security basics.

Cross-cutting

• Cloud: Azure / AWS / GCP (app hosting, managed DBs, storage, secrets, monitoring).
• Strong experience with authentication/authorization (claims/roles/policies; OAuth2/OIDC is a plus).
• Logging/monitoring mindset; ability to troubleshoot production issues.
• Unit testing (xUnit/NUnit, Angular testing with Jest/Karma) and writing testable code.
• Databases: confident with SQL, indexes, migrations; understanding of NoSQL concepts.
• Strong Git and PR-based workflow experience.
• English: B2+.

NICE-TO-HAVE

• Docker and containerized deployments; basic Kubernetes/Container Apps knowledge.
• CI/CD (Azure DevOps / GitHub Actions), environment configuration, release strategies.
• Architecture & practices: Clean Architecture, SOLID, DDD basics, CQRS (when appropriate).
• Performance: profiling, caching strategies, EF Core tuning, frontend performance optimization.
• Real-time / async: SignalR, background jobs (Hangfire), messaging (Service Bus/RabbitMQ).
• UI libraries/design systems: Angular Material, Tailwind, MudBlazor/Radzen/Syncfusion.

Join the development of nuclear programs at the International Atomic Energy Agency (IAEA). You’ll contribute to web solutions used within nuclear programs, working in an enterprise setup focused on stability, accuracy, and maintainable architecture.

The role is frontend-leaning: most tasks are on the Angular side, while a dedicated Backend developer is already part of the team. The system is hosted on own servers (on-premise).

What you’ll do

• Build and maintain web-based interfaces using Angular + TypeScript.
• Develop UI components with HTML and CSS3.
• Collaborate closely with the Backend engineer and contribute to full-stack delivery when needed.
• Work with backend services built with .NET/.NET Core (C#).
• Use SQL Server 2019+ and ORM patterns in a relational database environment.
• Work in an Agile setup and manage delivery through Azure DevOps.
• Communicate confidently in English across the team and stakeholders.

Requirements

• 5+ years of commercial experience with .NET / .NET Core and C#
• 3+ years with Angular and TypeScript
• Strong skills in HTML and CSS3
• Solid understanding of relational databases and ORM frameworks, with experience in SQL Server 2019+
• Hands-on experience working in Agile teams using Azure DevOps
• Full professional proficiency in English

Nice to have

• Experience building advanced analytical software and integrating with data lakehouse / data services (e.g., Trino)
• Python and data engineering frameworks: dlt, dbt, PySpark
• Experience building reusable enterprise-level frameworks in .NET

Tech Stack

Angular, TypeScript, HTML, CSS3, .NET/.NET Core, C#, SQL Server 2019+, ORM, Azure DevOps
Plus: Trino, Python (dlt/dbt/PySpark)

We are looking to hire a Full-stack Software Engineer to join our team. Our ideal candidate should have a strong technical background with deep expertise in middle-layer/server-side logic development with JavaScript (Node.js and React) and a strong willingness to deal with microservices.

Important! This role involves travel to the Netherlands: running in-person consulting sessions at the WeAreBrain office, and occasionally visiting the client’s office. Candidates must have the flexibility and ability to travel within Europe.

Our client is the largest retail group in the Netherlands, which owns and operates building materials stores across the Benelux. 
Focus areas:

- CMS for content managers

- product-related services

- search engine integration and services around it

This platform is designed based on a microservices architecture (using an event-driven programming paradigm). 
Currently, the platform contains 40+ services.

Platform tech stack: React, Node.js, SSR, Jest, Java, Spring, Hibernate, JUnit, SNS, SQS, PostgreSQL, DynamoDB Infrastructure: AWS, Docker, ECS, Bitbucket Pipelines (CI/CD), Terraform (IaaC)

Requirements

• A сomputer science, software engineering, or related field master's or bachelor's degree is a must
• Solid knowledge of architectural patterns and programming paradigms (OOP, SOLID, DDD, etc.)
• Good knowledge of modern systems architecture components, including microservices, event sourcing, and distributed data processing systems
• Hands-on experience with common RDBMS (PostgreSQL, MySQL, etc.) and knowledge of DBs design
• 4 years of middle-layer/server-side logic development experience with JavaScript (Node.js, React, Express, ES6); Experience in backend development with Java, Spring
• Understanding of server-side rendering principles
• Hands-on experience with messages queuing/delivery services (Amazon SQS, SNS, RabbitMQ, Kafka, etc.)
• Practical experience with infrastructure (Web servers, cloud services, containerization, UNIX/Linux command line)
• Hands-on experience with state management libraries (Redux)
• Experience with build tools (Webpack, Babel, ES Build)
• Experience with the writing of unit tests

Nice to have

• Experience in the optimization of system performance and understanding of monitoring systems and key metrics evaluation and analysis
• Experience with Contentful CMS;

Responsibilities

• Collaborate closely with Client’s development & infrastructure teams in Kyiv, the Netherlands, and Belgium
• 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
• Translate business requirements and feature requests into User Stories
• Contribute to overall product quality, be responsible for the front-end and middle layer stack, and the realization of a microservice’s architecture
• Deliver high-quality, testable, and maintainable code as well as review code written by others
• Improve the code quality and delivery approach using best practices
• Deploy applications on cloud servers using automation services

What we offer

• Opportunity to work on real-world projects with measurable business impact
• Flexible working conditions
• Competitive salary depending on your experience with a comprehensive benefits package, which includes a monthly €50 stipend to cover work-from-home expenses, and an allocation of 25 vacation days.
• After one year, WeAreBrain offers access to a Team Reward Program for all employees.
• Innovative Exploration: Seize the chance to pioneer your department, venturing into uncharted territories, and experimenting with fresh ideas that push boundaries.
• Entrepreneurial: Immerse yourself in a true entrepreneurial environment where every team member is an owner.
• Remote Work Flexibility: Our team has the freedom to work remotely, allowing you to achieve a healthy work-life balance that suits your preferences.
• Professional Growth: We value your growth. Take advantage of diverse opportunities and resources designed to nurture your professional development.
• A creative and dynamic work environment.

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 a Full-Stack Engineer who can work confidently across the full stack - React/TypeScript on the frontend, Node.js/Go 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)
• Preferred on-site in Barcelona with offical Spanish employment
• 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

About the role

We’re looking for a Full-Stack Vibe Coder — an engineer who builds fast, thinks in iterations, and actively uses AI tools as part of daily development.

You’ll work in a small, senior team, close to product, design, and QA, using AI-first workflows and fast feedback loops.

What you’ll be doing

• Build MVPs and early-stage products from scratch
• Develop full-stack features with a strong focus on speed and clarity
• Work in short iteration cycles with:
  • product analysts
  • UI/UX designers
  • QA engineers
• Actively use AI tools (Claude, Cursor) to:
  • accelerate coding and refactoring
  • explore implementation options
  • iterate on features quickly
• Work in a QA-driven development process where key requirements evolve through testing and client feedback

• Make pragmatic technical decisions focused on delivery, not over-engineering

   

Tech stack 

Frontend

• React
• Next.js

Backend

• NestJS
• PostgreSQL

AI tools

• Claude

• Cursor

   

We expect AI tools to be part of your daily workflow, not an occasional experiment.

What “vibe coding” means for us

• You code with AI, not against it
• You move fast and improve as you go
• You’re comfortable starting without perfectly locked specs
• You help shape requirements instead of waiting for them
• You care about shipping real products, not just clean abstractions

What we’re looking for

• Strong experience with React / Next.js
• Solid backend experience with NestJS
• Good understanding of relational databases (PostgreSQL)
• Experience building products end-to-end
• Comfort working with evolving requirements
• Clear communication and ownership mindset

• Strong interest in AI-assisted development

   

What we don’t need

• Engineers who require fully finalized specs before starting
• People who avoid or distrust AI tools
• Heavy enterprise mindset with long approval cycles

• “Perfect architecture first” thinking

   

What you get

• Real products that launch fast
• AI-first engineering culture
• Small, focused, senior team
• Direct impact on product outcomes

• Minimal bureaucracy, maximum ownership

   

About AppNow

AppNow builds digital products from idea to MVP in weeks.
We combine fast communication, AI-first development, and QA-driven workflows to deliver working products without unnecessary complexity.

Who We Are

At Patrianna LTD, we’re building a global social entertainment platform with a strong focus on iGaming products for the North American market. Our platform serves up to 150 million players worldwide, and we operate at scale with high demands on performance, flexibility, and content velocity.

Our CMS team is responsible for enabling content management across the entire company — including banners, pop-ups, promotions, onboarding flows, and live-ops content — using modern CMS solutions such as Builder, Prismic and other tools.

Who We’re Looking For

We are looking for a Lead Full-Stack Developer to join our CMS team and take ownership of the technical direction and implementation of CMS-related solutions across multiple products and brands. You will work closely with product managers, designers, backend engineers, and other front-end teams to deliver scalable, high-quality solutions that power content-driven features across the platform.

Responsibilities

• Technical & Architectural Leadership: Drove the technical strategy for the CMS part of the application, architecting and proposing scalable solutions. Led initiatives to optimize the frontend infrastructure and enhance Core Web Vitals, establishing a high-performance foundation for multiple large-scale projects.
• Code Review and Quality Assurance: Oversee code reviews, ensuring high-quality, maintainable code is consistently produced.
• Stakeholder Communication: Effectively communicate technical concepts and progress to non-technical stakeholders, like product owners and management.

• Process Optimization: Continuously improve the development process and workflows to enhance productivity and reduce bottlenecks.

   

RequirementsFront-End

• Experience in React, TypeScript, and Next.js (with App Router);
• Strong experience with the full i18n lifecycle for large-scale web applications, including the technical integration of translation management systems (e.g., Crowdin)
• Experience with monorepo tools like NX, Turborepo;
• Experience with third-party integrations (external APIs, analytics, AB tests);
• Experience with SEO optimizations and PageSpeed improvements (CLS, INP, etc);
• Building customer-facing and consumer-responsive web applications;

• Strong UI/UX experience.

   

Back-End

• Experience with Java and Spring Boot
• Good understanding of REST APIs and backend service design
• Experience working with relational databases (preferably PostgreSQL)

• Familiarity with messaging systems (e.g. Kafka)

   

We offer

• Modern tech stack and well-maintained codebase
• Real technical ownership and influence on architecture
• Minimal bureaucracy and fast decision-making
• Fully remote work
• Monthly medical or sports compensation
• Strong engineering culture and experienced teammates
• Opportunity to work on products with massive global scale