Jobs Fullstack

Вітаю тебе, фахівець \0/

Мене звати Кирил, я допомагаю зібрати дрім тім для своїх друзів з Hooh – це стартап від фаундерів Depositphotos. Команда сіньорна та досвідчена, тому опортʼюніті, ІМХО, дуже кльове.

отже

Hooh – це b2c AI-продукт, який робить складні документи простими для розуміння та дій. 

Він дозволяє завантажувати файли (PDF, фото, скани), автоматично розпізнавати їхній вміст, витягувати ключову інформацію та отримувати короткі, зрозумілі підсумки.
 

Ми успішно випустили v1, підтвердивши нашу основну AI-пайплайн-архітектуру. Зараз ми розширюємо продукт до “scanner-grade” PDF-досвіду, що поєднує глибоке AI-розуміння з надійним редагуванням документів.

Далі дозволю собі перемкнутись на англійську, бо мова піде про конкретні речі.
 

_________________

We are hiring a hands-on Engineering Lead (Full Stack) to own the Hooh engineering system end-to-end – architecture, reliability, and delivery. 
You will lead a small, high-output team (Backend, Full Stack, Applied AI, and iOS) while serving as a "player-coach".
 

You will architect and integrate Hooh’s end-to-end AI document understanding pipeline covering OCR, extraction, and conversational Q&A, paired with robust document manipulation capabilities.
 

This role could grow into Head of Engineering or CTO as the team scales.

Key Responsibilities

• End-to-End System Ownership
  • Own the entire pipeline: document ingest → processing (OCR/extraction) → AI workflows → APIs → iOS/web experiences.
  • Design and evolve API surfaces for document ingestion and AI-driven summarization.
• Architecture & Execution
  • Define service boundaries, API contracts, data models, and rollout patterns that keep the system coherent as the product surface area grows.
  • Engage in design reviews that span service decomposition and weigh CAP trade-offs.
• Hands-on Engineering
  • Ship core features across backend and web (React/Next.js/Node.js).
  • Unblock teammates and set the quality bar through exemplary PRs and technical decisions.
  • Optimize frontend hydration, bundle-splitting, and rendering concurrency.
• Reliability & Trust
  • Ensure reliability by design: idempotency, non-blocking execution, and horizontal scalability across worker clusters.
  • Implement security best practices around authentication, encryption, and secure data handling.
• Team Leadership
  • Improve delivery cadence through clear ownership, strong reviews, and pragmatic processes – keeping the team moving fast with confidence.

What We’re Looking For

• 5–7 years shipping production systems, with a strong preference for startup or high-ownership environments.
• Full-Stack Fluency: Deep expertise in TypeScript/JavaScript across backend (Node.js/Express) and frontend (React/Next.js).
• Database Depth: Advanced literacy in Postgres/MySQL, including schema evolution, query planning under load, read/write splitting, and connection pool tuning.
• Cloud & Infra: Proficiency with AWS/GCP/Azure, containers (Docker/K8s), CI/CD, and IaC (Terraform/CDK).
• Async Architectures: Experience with message queues (Kafka/SQS) and background job frameworks.
• Product Judgment: Ability to balance speed, quality, and architecture without over-engineering.
• Communication: Clear communicator who can align a small team and keep execution crisp.

Nice to Have Experience With

• Mobile-first products (especially iOS integration constraints and API versioning).
• Building PDF/document tooling (rendering, editing operations, performance at scale).
• Operationalizing AI/LLM features in production (evaluation, guardrails, monitoring).

The Team

• CEO
• Product Manager
• Fullstack Engineering Lead
• Back End Dev
• Fullstack Dev 
• AI engineer
• User Acquisition Manager
• 2х Designers 
• 2x iOS Devs

What We Offer

• Challenging technical problems and the environment to solve them.
• A clear growth path into Head of Engineering/CTO at a later stage.
• Direct influence on strategy and the ability to see your experiments ship fast.
• Be part of a team that previously built and scaled successful businesses.
• Flexible schedule and fully remote work from anywhere with reliable overlap to CET.
• 18 paid vacation days, 8 no-paperwork sick days, and 11 public holidays per year.
• Minimal bureaucracy, high trust, fast decisions.

Hiring Process:

1. Intro Call
2. Interview with CEO
3. Offer

About the role

We are building a revolutionary system at the frontier of technology and AI.

As a Software Engineer, you won’t just write code — you will shape the future of how apps are built. You’ll be part of the early execution engine—shipping core capabilities, refining the experience, and elevating reliability. Expect tight loops, clear ownership, and visible impact. You will engage directly with first clients, adapt the platform to their needs, and set the stage for the next generation of software creation.

What we’re looking for

We want someone who doesn’t just “fit the role” but defines it:

• Open-minded explorer — ready to try bold ideas, new approaches, and cutting-edge tools.
• Hacker mindset & problem solver — able to connect the dots across complex systems and find elegant solutions.
• Analytical & resilient — thrives in debugging intricate, interconnected architectures.
• Startup speed enthusiast — comfortable hacking fast, shipping early, learning from feedback, and polishing later.
• Experienced in Cursor or Claude Code.
• Passionate about vibe-coding  — turning AI into your engineering team-mate.
• Natural leader — with the drive to inspire and guide people.

Why join us?

• Be among the first engineers driving a bold, world-changing vision.
• Work at the bleeding edge of technology and AI, where experimentation is not just allowed but expected.
• Direct influence on product.
• A chance to build something that reshapes how things get done in today’s world.
• A team that values curiosity, creativity, and the pure joy of hacking together the future.

This isn’t just another job. This is your chance to engineer the future of software itself.

Technical stack

Core technologies:

• TypeScript, React.js, Next.js, Bun.
• ClickHouse, PostgreSQL, Redis
• Docker / Kubernetes
• Kafka
• Supabase, Inngest, Posthog

Nice to have:

• Vue.js
• Python
• Go
• Ruby

Hiring Process

Stage 1: Interview with HR (1h).

Stage 2: Interview with VP of Engineering.

Stage 3: Technical assignment (optional).

Stage 4: Tech. Interview

Stage 5: Interview with the team.

What we offer for your success

• Very warm and friendly working environment and flexible working schedule.
• 20 days off + paid national holidays, and 12 sick days paid by the company per year.
• Medical insurance, and health protection programs (with COVID-19 and dental coverage).
• Continuous professional development and growth opportunities.

We’re looking for a highly experienced Senior Full-Stack Developer (60 % Frontend / 40 % Backend) who can own complex, data-driven features end-to-end. This role is ideal for a senior, independent engineer who learns quickly, thrives in a fast-paced startup environment, and takes full responsibility for delivering high-impact work.

You’ll join a small, high-impact engineering team building a modern FinOps platform used by enterprise customers worldwide. The ideal candidate enjoys creating sophisticated user interfaces, has a deep understanding of modern frontend architecture, and brings strong backend depth — feeling confident designing and implementing complex server-side logic, APIs, and data flows as part of full feature ownership.

The role requires extensive experience building data-heavy systems with large datasets, aggregations, and performance-sensitive flows.

Responsibilities

• Designing and developing advanced UI features and dashboards (React + JavaScript / TypeScript)
• Designing and implementing data-heavy features involving large datasets, aggregations, performance optimization, and complex analytical flows
• Owning features end-to-end: design, architecture, implementation, testing, deployment
• Working across the stack: primarily frontend, with meaningful backend and server-side work
  Building and maintaining server-side logic, APIs, and integrations as part of the feature lifecycle
• Collaborating closely with product, backend, and data teams on requirements and solutions
  Troubleshooting bugs and performance issues (roughly 50% of the workload over time)
• Working in cloud-native environments (AWS)
• Using AI-assisted development tools to improve productivity and quality
• Contributing to code quality, performance, scalability, and maintainability

Requirements

• 6+ years of hands-on development experience as a Full-Stack Developer, strong on both frontend (React, JavaScript/TypeScript) and backend (Python, APIs, scalable services)
• Bachelor’s in Computer Science or related field
• Strong React and JavaScript/TypeScript skills for frontend, with experience delivering complex, data-heavy UI features
• 2+ years building Python backend APIs and scalable services, handling large datasets and performance-critical flows
• Experience with databases (SQL/NoSQL, DynamoDB, BigQuery) and AWS/cloud-native environments
• Familiarity with visualizations, graphs, and interactive dashboards; experience in B2B SaaS or data-centric products
• Meaningful experience working with data-heavy systems (large datasets, aggregations, performance considerations, etc.
• Independent, detail-oriented, fast learner with a strong ownership mindset; comfortable using AI-assisted development tools

Who you are

• A senior engineer who can pick up complex tasks quickly
• Someone who learns independently and doesn’t need constant guidance
• A proactive problem-solver with strong attention to detail
• A clear communicator who works well in a remote setup
• Someone who cares about user experience, performance, and clean code
• Comfortable balancing new feature development with ongoing bug fixes

What we offer

• Competitive salary and benefits package
• Medical insurance
• Full Remote
• Collaborative and innovative work environment
• Career growth and development opportunities
• A chance to work with a talented and driven team of professionals

About the project

The company delivers a cloud cost optimization platform that helps companies track, analyze, and reduce their cloud spending. It provides full visibility into resource usage, identifies waste, and offers actionable recommendations to improve efficiency. The platform enables teams to control costs, forecast budgets, and make data-driven decisions about their cloud infrastructure.

We’re looking for a proactive, team-oriented and motivated Full Stack Engineer (WordPress / React) who will be responsible for both back-end and front-end development, including creating custom WordPress themes and plugins.

You’ll work closely with partners and stakeholders, participate in architecture decisions, and contribute to building scalable and reusable solutions from scratch.

Responsibilities

• Communication & coordination with partners and clients
• Participation in planning, architecture, and technical evaluation
• Application architecture and design
• Auditing and analyzing project documentation and specifications
• Setting up project core structure from scratch
• Maintaining and improving ongoing projects
• Developing and maintaining reusable components
• Driving an agile development process within the team
• Building responsive WordPress themes and custom plugins
• Creating custom Gutenberg blocks

Requirements

• 5+ years of commercial experience in web development
• Strong experience with WordPress (including headless WordPress)
• Solid knowledge of PHP and OOP principles
• Experience in developing custom WordPress themes and plugins
• 5+ years of experience with JavaScript (React.js, jQuery)
• Experience creating Gutenberg blocks from scratch
• Experience with Advanced Custom Fields (ACF)
• Strong knowledge of HTML, CSS3, and responsive development
• Experience working with APIs
• Good understanding of REST principles and RESTful services
• Experience with Git
• Upper-Intermediate or higher English

Nice to have

• Experience with JavaScript or PHP frameworks (Angular, Vue.js, Symfony, Laravel, etc.)
• Experience with Docker
• Experience with MVC-based WordPress frameworks (Lumberjack, Sage, Themosis, TypeRocket, etc.)

Requirements:

• Proficiency with React and TypeScript for frontend development
• Strong backend development experience with Python and PostgreSQL, including schema design and migrations (SQLAlchemy + Alembic)
• Deep understanding of asynchronous programming and event-driven systems (Python async, background processing, integrations)
• Experience with workflow orchestration tools
• Hands-on experience working with Apache Airflow, including DAG's and backend integrations
• Experience in building or designing data pipelines, including orchestration, data processing and integrations (batch and/or streaming)
• Build and maintain infrastructure using Terraform, Kubernetes and Helm
• Experience deploying and operating services on Kubernetes, including maintaining Helm charts
• Ability to work highly autonomously, proactively clarify requirements and driving work forward with minimal supervision
• Strong communication skills and experience working in distributed teams

Nice-to-Have:

• Familiarity with FastAPI
• Experience with Bazel build system (training can be provided)
• Experience with CI/CD pipelines
• Prior experience in environments with limited product management and high ownership

Key Responsibilities:

• Design, build and deliver full-stack features using Python, PostgreSQL, React and TypeScript
• Take ownership of features from initial, sometimes ambiguous ideas to production, including:
• clarifying requirements and assumptions
• technical design
• implementation
• testing, deployment and monitoring
• Design and maintain integration-heavy backend services, collaborating with other teams and consuming internal API's
• Work closely with Apache Airflow pipelines (seamless integration with backend services)
• Design and implement scalable backend systems using PostgreSQL
• Proactively identify risks, dependencies and gaps in requirements, and drive solutions 
• independently
• Build and maintain infrastructure using Terraform, Kubernetes, and Helm
• Collaborate with team members in regular syncs to discuss progress, blockers and demos
• Participate in code reviews, design discussions and cross-team technical coordination

About the Project:

We’re hiring a Full-Stack Software Engineer (Python + React) to join a fast-paced, highly autonomous team. This role is ideal for an engineer who is comfortable working across the stack, passionate about writing clean and scalable code, and capable of driving features end-to-end - from design to infrastructure provisioning to production monitoring.

Engineers are trusted to make decisions, ask the right questions and deliver production-ready solutions. The work spans backend services, Airflow-driven workflows, infrastructure and frontend with a strong emphasis on building reliable, well-integrated systems that scale.

You will work closely with cross-functional teams to build new features from scratch.

We’re a growing product team building modern web solutions in the fintech and entertainment domains.

We’re looking for a motivated Junior React / Node.js Developer who’s eager to learn from experienced mentors and grow into a strong Full-Stack Engineer.

📍 Location: Warsaw, Poland (on-site)
🕐 Start: ASAP
 

Requirements:

•  1–3 years of experience with React, Node.js, and TypeScript
•  Understanding of RESTful APIs and CRUD operations
•  Experience with PostgreSQL or MongoDB
•  Good knowledge of HTML5, CSS3 (and preprocessors like SCSS)
•  Familiarity with Git and Agile development
•  English: Intermediate or higher (spoken communication required)

Nice to have:

• Familiarity with CI/CD pipelines
• Basic Docker or AWS experience

Responsibilities:

• Development and maintenance of Front-end applications using React and Web Components;
• Development Backend using Node.js
• Optimization of application performance and scalability.
• Testing and debugging of code.
• Participation in technical discussions and collaborative development.

CONDITIONS:

— The trial period lasts 3 months;

— 15 vacation days per year included (1.25 days are charged every month);

— 5 sick days per year included.
 

We offer:

• On-site position in Warsaw
• Mentorship from senior developers
• Real growth path from Junior to Middle level
• Friendly team and stable environment
• Competitive salary (discussed individually)

💬 If you are ready to join our team and work on exciting projects in Full-Stack development using React / Node.js, we invite you to submit your resume. Join us and showcase your talent in building high-quality, scalable web and mobile applications.

We are currently looking for an experienced Strong Middle / Senior Full-Stack Developer to join the Constrol Digital Platform team.

Constrol operates in the construction industry and offers three core products: a Digital Platform, BIM Modeling Services, and Budget Accompaniment. The Digital Platform enables users to create a clear Bill of Quantities (BOQ) connected directly to BIM models, presenting data side by side in an efficient and user-friendly way — even for non-technical users.

The platform supports complex operations such as clause isolation within written quantities, intersection analysis by territory and craft, and automated quantity calculations. The project is in the maintenance and active development phase, including architecture upgrades, refactoring, and development of new features (some from scratch).

You will join a collaborative team working in Agile methodology and contribute to the long-term evolution of the product.
 

Requirements:

• Bachelor’s degree in Computer Science or a related field (mandatory)  
• 5–6+ years of experience in Full-Stack development (4.5+ years may be considered for strong candidates)  
• Strong proficiency in HTML, CSS, and JavaScript/TypeScript  
• Hands-on experience with React (frontend)
• Solid backend experience with Node.js and/or Nest.js  
• Experience with PostgreSQL and relational databases  
• Strong understanding of front-end and back-end architecture  
• Experience with microservices architecture and event-driven patterns  
• Familiarity with cloud platforms (GCP preferred, AWS/Azure are also relevant)  
• English level: Upper-Intermediate (B2)+  
• Strong team player, self-managed, responsible, and professional  
   

Nice to have:

• Experience with MongoDB  
• Experience in BIM domain  
   

Responsibilities:

• Participate in the design and development of a scalable, high-performance platform  
• Develop new features, maintain existing functionality, fix bugs, and improve performance  
• Contribute to architectural upgrades and refactoring initiatives  
• Collaborate closely with developers, Product Manager, and CTO to ensure smooth system integration  
• Work with stakeholders to define requirements, scope, and timelines  
• Contribute mainly to Backend (approx. 60%) and Frontend (approx. 40%) development  
   

We Offer:

• 20 vacation days (workdays)
• 7 sick days
• Personalized career growth
• Internal English classes
• Education reimbursement
• Corporate events and team buildings
• Equipment provided

We’re looking for an experienced Senior Fullstack Engineer (React + Java) who is passionate about building modern, scalable web applications and ready to take technical ownership. If you enjoy working across the full stack, shaping architecture decisions, and delivering high-quality solutions — this role is for you. You’ll collaborate with a talented team, contribute to impactful products, and help us create exceptional user experiences.

Come join us and let’s build powerful, user-focused solutions together! 🚀

🧰 Requirements:

• 5+ years of professional experience in software development.
• 3+ years of hands-on experience with React and TypeScript.
• Strong fullstack expertise (both frontend and backend development).
• Solid backend experience with Java and RESTful API development.
• Strong knowledge of HTML5, modern JavaScript, and responsive design principles.
• Experience designing and building scalable web applications.
• Deep understanding of clean code, testability, and maintainability.
• Ability to work independently and take technical ownership of solutions.
• Strong communication and collaboration skills.

🧰 As a plus:

• Experience with Progressive Web Apps (PWA).
• Familiarity with Ionic Framework, Capacitor, or hybrid mobile approaches.
• Experience working with cloud environments.
• Golang experience.

💻 Responsibilities:

• Develop and maintain customer-facing web applications using React and TypeScript.
• Design and implement robust backend services using Java.
• Participate in architectural discussions and drive technical improvements.
• Collaborate closely with UX, product, and backend teams to deliver end-to-end features.
• Ensure high code quality through testing and best development practices.
• Occasionally contribute to PWA or hybrid mobile initiatives.
• Continuously improve performance, scalability, and maintainability of applications.

🎁 We offer:

• Competitive salary.
• Flexible working hours.
• Paid time off and holidays.
• Professional development opportunities.
• Friendly and supportive team environment.
• Opportunity to work on innovative and technically challenging projects.
• Career growth and leadership opportunities within the company.

If you're ready to make an impact and grow as a Senior Engineer — we’d love to hear from you!

Responsibilities

• Develop and maintain backend functionality using PHP 7.4 and Symfony 4.4.
• Work with MySQL (MariaDB): queries, optimization, schema updates.
• Build and enhance UI components using React.
• Maintain and extend legacy frontend parts built with jQuery.
• Design and support REST APIs for frontend-backend integration.
• Participate in code reviews and technical discussions.
• Debug, optimize, and improve system performance.
• Collaborate with product, QA, and other developers.

Requirements

• 3+ years of experience in full-stack development.
• Strong experience with PHP and Symfony framework.
• Solid knowledge of MySQL/MariaDB.
• Practical experience with React.
• Experience working with jQuery and legacy frontend code.
• Understanding of REST APIs and client-server architecture.
• Experience with Git and development best practices.

As A Plus

• Experience with upgrading legacy systems.
• Knowledge of Docker or CI/CD pipelines.
• Experience writing unit or integration tests.
• Familiarity with Agile/Scrum processes.

We Offer

• Competitive salary
• Flexible schedule
• Social package
• Courses, webinars, seminars to increase professional skills
• Snacks & fruit, foosball, fun office environment
• Horizontal hierarchy. No micromanagement pressure
• Open company culture where your ideas and initiatives are valued
• Regular team building & corporate events
• International projects

About the Product

We’re building a web3 platform focused on crypto options trading. It's like building an exchange from scratch.

The product operates in a real-time environment where market data, user actions, and financial state must stay consistent and reliable at all times. We work with live trading flows, user balances, deposits and withdrawals, and systems where correctness and trust are critical.

At the same time, we’re an early-stage startup — small team, fast iterations, and product decisions driven by user value rather than process.

This is a high-responsibility environment where engineering quality, speed, and product thinking matter equally.

The Role

We’re looking for a highly autonomous Full-Stack Engineer to own the entire platform layer outside of the trading engine.

You will be the solo full-stack owner of everything related to the user-facing system:

• Web application and UI
• Authentication and account flows
• Deposits, withdrawals, balances
• User dashboards, analytics, and statistics
• Product features and UX improvements

This role requires strong product thinking, architectural ownership, and the ability to move fast with minimal supervision.

Tech Stack & Environment

• React / Next.js (TypeScript)
• Nest.js
• WebSockets (real-time data)
• REST APIs
• PostgreSQL
• Docker
• Direct work with VPS servers
• CI/CD pipelines (self-managed)

You will be responsible not only for development, but also for:

• Deploying and debugging your services
• Setting up and maintaining CI/CD
• Monitoring and fixing production issues
• End-to-end ownership of your features

AI-First Development

We actively use AI in development.

You’ll be working with tools like Cursor/Claude Code.

The expectation is that you are comfortable using AI to move faster, explore solutions, and improve productivity.

What You’ll Work On

• Building high-quality product features end-to-end
• Working with real-time market and user data
• Designing systems that handle money safely and consistently
• Ensuring correctness of balances, transactions, and financial logic
• Creating polished UI with strong attention to detail, animations, and UX
• Integrating analytics, tracking, and product metrics
• Participating in product planning and decision-making

We are user-first.

Consistency, reliability, and trust are critical — this is a financial product.

What We’re Looking For

• 4+ years of full-stack experience
• Strong React / Next.js / TypeScript
• Solid backend experience (Nest.js)
• Strong understanding of PostgreSQL and data modeling
• Experience working with WebSockets or real-time systems
• Ability to design architecture and own systems independently
• Comfortable working directly with servers, Docker, and deployments
• Experience setting up and maintaining CI/CD
• Strong debugging skills across the full stack

Mindset matters more than tools:

• Startup experience or comfort in fast-moving environments
• Product mindset — you care about user experience and outcomes
• High autonomy — you don’t wait for detailed instructions
• Ability to make pragmatic decisions quickly
• Strong code quality standards and engineering taste
• Ability to quickly understand and work with existing code
• Willingness to jump into critical issues when needed

Why This Role Is Interesting

• Founding engineer position with high product ownership
• Strong growth opportunity through direct mentorship and hands-on architecture work
• Direct impact on how the platform looks and works
• Minimal bureaucracy, fast decision cycles
• Work directly with the CTO and a small, strong engineering team
• Opportunity for future equity/options
• Real product challenges: real-time systems, financial accuracy, production ownership

You’ll build the intelligence and autonomy layers on top of a solid architecture: .NET 9 modular monolith + Python/FastAPI services on GCP (Pub/Sub, Cloud Tasks, BigQuery, Supabase/PostgreSQL) with live Meta Ads API and Shopify GraphQL integrations.
In the first 90 days you’ll deliver three defined sprints: Shopify attribution + benchmarks (Sprint 1), Creative Intelligence with embeddings + LLM fallback (Sprint 2), and an agentic loop with an Action API that executes approved Meta Ads actions (budget scaling, pause, deploy) with audit/audit trail (Sprint 3).

Product & Environment

We’re building a system with a modern stack and live integrations, where your decisions affect real ad accounts:

• C#/.NET 9 modular monolith, Python/FastAPI microservices, Next.js 16, Supabase/PostgreSQL, BigQuery, Google Cloud (Pub/Sub, Cloud Tasks, GCS)
• Integrations with Meta Ads API and Shopify GraphQL
• 20 repositories, ~95k LOC, event-driven pipeline

How We Work

Claude Code is not optional. We use AI as a force multiplier: we measure output, not hours. The code must work, tests must pass, and APIs must behave correctly.
The wrong candidate either refuses to use AI tools (“I prefer to write it myself”) or over-trusts them (“Claude Code wrote it so it must be correct”).

Responsibilities

• Build features in .NET (core API) and Python/FastAPI (pipeline / categorization / agent services)
• Integrate with Meta/Shopify and work on real budget/campaign changes
• Work with PostgreSQL: schemas, migrations, indexes, query optimization
• Strong testing culture: unit/integration/E2E where needed

Requirements (Non-negotiable)

• Production C# / .NET 8–9: EF Core migrations, DI patterns, middleware; able to read a modular monolith without “hand-holding”
• Experience with GraphQL resolvers (HotChocolate is a plus, but any GraphQL server is fine)
• Production Python / FastAPI: async/await, Pub/Sub message handling, gRPC; integrations with AI APIs (OpenAI/Anthropic, etc.)
• API integrations: integrated with at least two complex third-party APIs (Meta Ads / Google Ads / Shopify GraphQL / Stripe, etc.), including rate limiting, pagination, webhooks, versioning
• AI-augmented development: daily use of Claude Code / Cursor / Copilot (or similar) + understanding where they fail
• Testing discipline: tests are part of the process, not “later”

Strong Plus

• Ecommerce/DTC (Shopify, attribution, ROAS, NC vs returning customers)
• Experience with embeddings / cosine similarity / clustering / recommendations
• Event-driven architecture (Pub/Sub or Kafka), idempotency, DLQ, eventual consistency
• Hands-on GCP (Cloud Run, Cloud Tasks, Pub/Sub, BigQuery, GCS)
• Experience preparing a SaaS/agency for exit (focus on quality, documentation, system autonomy)

What You’ll Build (First 90 Days)

We have 3 detailed sprints — no ambiguity or fluff — with clear deliverables from Day 1.

Sprint 1 (Weeks 1–2): NC Attribution + Shopify Integration

• Customer/Order entities; NC classification (customer.numberOfOrders == 1)
• Channel attribution via Shopify customerJourneySummary + click ID parsing (fbclid/gclid/ttclid)
• EWMA benchmark fixes + unit tests; CM1/CM2/CM3 contribution margin; Benchmarks page API

Sprint 2 (Weeks 3–5): Creative Intelligence + Testing Arena

• Attribution Confidence scoring (High/Med/Low/Dark)
• Efficiency Score (0–100), zone classification (Winner/Functional/Testing/Kill Zone)
• Persona/Angle categorization via embedding similarity + LLM fallback
• Creative Matrix data layer, Scale Opportunities endpoint

Sprint 3 (Weeks 5–8): Agentic Loop + Owner Independence

• Decision Engine (rules-based action queue + priority scoring)
• Action API: execute approved actions via Meta Ads API (budget scaling, pause, deploy)
• Decision logging + audit trail
• Integrations: Nano Banana creative generation, MILA AI assistant, brand onboarding

Not a Fit If

• You think AI coding tools are a fad or “beneath senior engineers.” Our workflow is built around them.
• You need architecture hand-holding. Sprint scopes are detailed, but you must make real-time decisions on data modeling, API design, and integration patterns without waiting for approval.
• You only work in one language. This role requires fluency in both C# and Python. TypeScript is a bonus, not required for this scope.
• You’ve never integrated with complex third-party APIs. If your experience is mostly internal CRUD apps, Shopify/Meta edge cases will slow you to a crawl.
• You ship code without tests. We have 440 lines of untested financial math (P0 fix). Testing is core to the job, not “if there’s time.”
• You need a detailed spec for every function. We define WHAT to build and WHY — you decide HOW.
• You want a strict 9–5. This is a high-intensity engagement with a clear deadline. We’re not asking for 80-hour weeks, but we need someone who ships consistently and communicates proactively when blocked.

We are looking for a Middle Full Stack Web-Developer (Retool / JavaScript / SQL) to fintech project.

Full-time, Office, 10:00–19:00 (Kyiv) 

Core requirements:

• Strong knowledge of JavaScript 
• At least 2+ commercial experience with JS
• At least 1+experience in e-commerce, FinTech or Affiliate Marketing
• Expert at SQL proficiency (SELECT, JOIN, filters)
• Deep understanding of API structure and data workflows
• Ability to quickly navigate app logic and update UI/logic
• Attention to detail and accuracy
• Excellent communication and time management skills 

Responsibilities:

• Develop new functionality in Retool
• Implement JavaScript logic (queries, scripts, events)
• Work with PostgreSQL / MySQL / Maria DB
• Integrate external services via API
• Optimize forms, tables, data display, and business logic
• Maintain and improve existing Retool applications

Would be a plus:

• Experience with Retool or other low-code platforms
• Basic understanding of backend concepts
• Node.js experience 

We offer:
 

• Full-time work in a creative team
• Cozy office in Kyiv 

• Schedule: Monday–Friday, 10:00–19:00

   

👉 Feel free to contact me. Let's discus details. Looking forward for your CV!

We are looking for a Middle Full Stack Web-Developer (Retool / JavaScript / SQL) to fintech project.

Full-time, Office, 10:00–19:00 (near Promenada Mall, Bucharest, Romania)

Core requirements:

• Strong knowledge of JavaScript 
• At least 2+ commercial experience with JS
• At least 1+experience in E-commerce, FinTech or Affiliate Marketing
• Expert at SQL proficiency (SELECT, JOIN, filters)
• Deep understanding of API structure and data workflows
• Ability to quickly navigate app logic and update UI/logic
• Attention to detail and accuracy
• Excellent communication and time managment skills 

Responsibilities:

• Develop new functionality in Retool
• Implement JavaScript logic (queries, scripts, events)
• Work with PostgreSQL / MySQL / Maria DB
• Integrate external services via API
• Optimize forms, tables, data display, and business logic
• Maintain and improve existing Retool applications

Would be a plus:

• Experience with Retool or other low-code platforms
• Basic understanding of backend concepts
• Node.js experience 

We offer:
 

• Full-time work in a creative team
• Comfortable office near Promenada Mall

• Schedule: Monday–Friday, 10:00–19:00

   

👉 Feel free to contact me. Let's discuus details. Looking forward for your CV!

About the Role

As a Senior Full Stack Developer, you will play a pivotal role in designing, developing, and maintaining our web applications, ensuring high performance and scalability. You will work closely with cross-functional teams to deliver high-quality software solutions while contributing to projects that integrate advanced machine learning models, including large language models (LLMs), to deliver personalized user experiences and innovative features. You’ll be part of a small, collaborative team that values continuous improvement and embraces the latest in technology.

Our technology stack includes .NET Core, C#, React.js, Node.js, Typescript, SQL Server 2019, Docker, Kubernetes, Google Analytics, and Power BI.

Our ecosystem includes 170 connected applications and services, our main database is 2 TB, our sites handle 1 million visitors a day and 2 billion requests a month, and we release changes to production several times a day. We are a continuous integration and continuous deployment (CI/CD) organization. 

What You’ll Do:

• Guiding the team in making well-informed technical decisions that enhance the quality and maintainability of our solutions.
• Collaborating with cross-functional teams to demonstrate how they can effectively leverage our infrastructure to meet their objectives.
• Designing, developing, and maintaining robust, scalable, and efficient web applications, backend logic modules and database structure.
• Identifying and implementing strategies to improve the stability, performance, and scalability of our applications and services.
• Responding promptly to production incidents, employing creative problem-solving skills to minimize downtime and mitigate potential issues.
• Mentoring and supporting team members, fostering a culture of continuous learning and technical excellence.
• Conducting code reviews and ensuring adherence to coding standards and best practices across the team.
• Participating in the evaluation and integration of new technologies, including AI and automation tools, to drive innovation and efficiency.

What We’re Looking For:

• Minimum of 5 years of professional experience in full-stack development.
• Extensive experience with React.js, including state management (Redux, Context API) and component-based architecture.
• Proficiency in .NET frameworks, C#, and data access technologies.
• Familiarity with Unit / Integration tests using any of Jest, NUnit, Playwright, React Testing Library.
• Strong knowledge of front-end technologies such as HTML5, CSS3, JavaScript, and TypeScript.
• Familiarity with database systems such as SQL Server or MySQL.
• Strong knowledge of design and architectural patterns, SOA design & web service development.— Strong understanding of development processes.
• Experience with LLMs / Generative AI tools (e.g., OpenAI, Copilot, Cursor).
• Experience with Web Page performance optimization and measurement will be a plus.— Degree in Computer Science, a related discipline or equivalent work experience.
• Upper-intermediate level of English.
• Excellent problem-solving and analytical skills, with a keen attention to detail.
• Strong communication and interpersonal skills, with the ability to work effectively in a team-oriented environment.
• Ability to manage multiple tasks and prioritize effectively in a fast-paced environment
• Demonstrated leadership abilities, with a track record of mentoring and guiding junior developers.

Perks and Benefits

• Time off throughout the year (paid and unpaid)
• Professional development support and encouragement
• Resources to help improve your overall well-being
• Free JustAnswer membership

Join a team that makes changes and meets business goals!

We value responsibility, open communication, technical common sense, and working together toward real results. If you’re looking to grow in a strong team and see the impact of your work — you’re in the right place.

Must have

• React, Next.js, Node.js, Fastify, TypeScript, MySQL, AWS(cost and usage, EC2)
• A result and client-oriented approach
• Strong Communication and presentation skills

• Intermediate English

   

Requirements:

• React.js
• TypeScript
• Tailwind CSS
• Node.js (Express.js/Fastify/Hono Framework)
• Cron Jobs
• SQL
• S3-Compatible Object Storage (AWS S3, MinIO)
• Experience in designing ci/cd pipelines
• AI

Would be a plus

• Next.js
• GraphQL
• MongoDB
• Elasticsearch
• Redis Auth0 OpenAI API
• Experience in building RAG agents

Key responsibilities

• Development and maintenance of the web application interface.
• Frontend integration with APIs.
• Performance optimization and interface responsiveness.
• Working with modern frameworks (Vue/React).
• Participation in code reviews and collaboration with the team (backend, QA).
• Integration of AI functionality for media content creation, including a user-friendly interface to manage the content creation process.
• Working with APIs of AI services for video generation and processing.

We offer

• competitive salary and bonuses
• an opportunity to work on interesting projects with a team of experts
• professional and personal growth through the company’s encouraging program
• feedbacks from supervisors and team members on a regular basis
• flexible working hours to provide you with life-work balance
• flexible vacation policy
• paid sick leaves
• English/Psychology classes