Jobs Fullstack

About Us

Smart Capital Center is an end-to-end, AI-powered platform for Commercial Real Estate (CRE) investment and financial management. We power real-time underwriting, asset management, and portfolio analytics through a combination of live data, workflow automation, and AI-driven insights.

Operating at the intersection of Generative AI, finance, and real estate, we are building systems that digitize and simplify complex financial workflows.

Our clients include leading institutions such as JLL, Pacific Life Insurance Company, and KeyBank. We are a lean, high-performance team building category-defining technology in a $17 trillion industry.

To learn more about our platform and vision, please visit www.smartcapitalcenter.com

The Role

We are looking for a Senior Backend-Focused Full Stack Engineer who excels at building scalable backend systems while remaining comfortable contributing across the full stack.

In this role, your primary focus will be designing and building the backend services, APIs, data models, and infrastructure that power our AI-driven financial platform. You'll also collaborate with frontend engineers and contribute to our React application when delivering end-to-end features.

This is a high-impact role for an engineer who enjoys solving complex backend challenges, takes ownership of core platform components, and helps shape the technical direction of our products.

What You Will Do

Backend Engineering (Primary Focus)

• Design, build, and maintain scalable backend services using Java/Spring Boot (preferred) or Python
• Develop secure, high-performance REST APIs that power real-time financial workflows
• Design efficient database schemas and optimize SQL queries for large datasets
• Build integrations with third-party services, financial data providers, and AI services
• Improve application performance, scalability, reliability, and observability
• Design asynchronous workflows, background jobs, caching, and event-driven architectures
• Troubleshoot production issues and continuously improve system resilience

Full Stack Development

• Deliver end-to-end features spanning backend services, APIs, and React frontend
• Collaborate with frontend engineers to define API contracts and data models
• Contribute to frontend development when needed using React and TypeScript
• Ensure seamless integration across backend services, frontend applications, and data layers

System Design & Architecture

• Design scalable, modular architectures that support rapid product evolution
• Define service boundaries, API contracts, and domain models
• Evaluate new technologies and architectural approaches
• Drive improvements in performance, maintainability, and scalability

Technical Leadership

• Own critical backend systems from design through production
• Establish high standards for code quality, testing, and maintainability
• Mentor engineers through code reviews and technical collaboration
• Proactively identify technical debt and drive long-term improvements

Collaboration

• Partner closely with Product, AI, and Frontend teams to deliver customer-facing features
• Participate in architecture discussions and technical planning
• Contribute to Agile development processes and continuous improvement

Requirements

Experience

• 5+ years of professional software development experience
• Proven experience building scalable backend systems in production
• Experience delivering full stack applications with a backend-first mindset
• Demonstrated ownership of systems throughout the software lifecycle

Backend (Primary Requirement)

• Strong experience with Java and Spring Boot (preferred) or Python
• Experience designing scalable REST APIs and backend services
• Strong understanding of distributed systems and microservice architectures
• Advanced SQL skills (PostgreSQL preferred)
• Experience with asynchronous processing, messaging, and event-driven systems
• Experience with caching technologies such as Redis
• Strong understanding of authentication, authorization, and application security
• Experience integrating external APIs and third-party services
• Experience optimizing application performance and database queries

Frontend (Secondary Requirement)

• Solid experience with React and TypeScript
• Comfortable building and maintaining modern frontend applications
• Experience consuming REST APIs and managing application state
• Understanding of frontend performance and responsive UI development
• Ability to contribute across the stack when required

Cloud & DevOps

• Experience with AWS or comparable cloud platforms
• Experience with Docker and containerized applications
• Familiarity with CI/CD pipelines
• Experience with monitoring, logging, and observability tools

Core Engineering Skills

• Strong system design and architectural thinking
• Excellent debugging and problem-solving skills
• Ability to balance technical excellence with business priorities
• High ownership and accountability
• Excellent communication and collaboration skills

Nice to Have

• Experience with Generative AI or LLM integrations
• Experience with vector databases or AI infrastructure
• Experience with GraphQL
• Experience with Kafka, RabbitMQ, or similar messaging platforms
• Experience with Kubernetes
• Experience building financial, investment, or analytics platforms
• Experience working with large-scale data processing pipelines
• Familiarity with Commercial Real Estate (CRE) or FinTech
• Experience using AI-assisted development tools (GitHub Copilot, Cursor, Claude Code, etc.)

Why Join Us

• Build the backend platform powering next-generation AI products for Commercial Real Estate
• Solve technically challenging problems involving distributed systems, AI, and financial data
• Own critical platform components with significant architectural influence
• Work alongside a high-performing, execution-focused engineering team
• Ship quickly with minimal bureaucracy and high autonomy
• Competitive compensation and benefits

About Us 

ChatRevenue.ai was founded by Ratmir Timashev (founder of Veeam) 

and Vlad Voskresensky (founder of Revenue Grid) to create the next generation of CRM systems. 

We’re building an AI-native CRM platform that completely redefines how sales automation 

works. 
By structuring data for intelligent automation, we enable agentic AI to design workflows, assist Sales Leaders and Reps in real time, and generate predictable sales funnels – all through a simple, chat-driven interface. 

Our mission: to build a CRM that works for User, not the other way around. 

About the Role 

This role is for engineers who thrive in dynamic environments where processes are still being shaped and impact is immediate. 

At ChatRevenue, we focus on outcomes rather than ceremonies – no endless grooming sessions or heavy planning rituals. 

Our engineering processes are evolving, and you’ll have a direct influence on how they are structured. There are no excessive management layers or long approval chains – decisions are made quickly through open discussion and direct collaboration. 

Previous startup experience is not required. What matters is your ability to operate without rigid rules, take initiative, and make independent technical decisions. 

What You’ll Do 

• Architect and maintain backend services using Python / FastAPI 
• Build seamless integrations with between our code product and external ecosystems (CRM, communication platforms) 
• Design and optimize scalable ETL/ELT pipelines 
• Develop and deploy production-ready Generative AI features to enhance product capabilities 
• Lead features from initial technical design to production release and ongoing support 
• Deliver high-quality code in short, impactful cycles 
• Maintain DevOps best practices (testing, CI/CD, security, containerization) 

What We’re Looking For 

• Strong Python skills (FastAPI, async, Pydantic) 
• Experience with SQL (PostgreSQL), Pandas, and data pipelines 
• Solid understanding of HTML/CSS/JavaScript
• Hands-on experience with Docker, Kubernetes, Azure, Kafka 
• Experience with CI/CD and Git-based workflows 
• Curiosity about product-building and openness to evolving environments 
• Strong teamwork skills – constructive code reviews, active participation in technical discussions, and ownership mindset 

Nice to have 

• Experience with OpenSearch 
• DevSecOps exposure 
• Advanced debugging skills 
• Azure API Management 
• Experience developing Generative AI features 
• Integrations with Salesforce, Google Meet, or similar platforms 

Why Join Us 

• Remote-first culture – work from anywhere 
• Flexible schedule aligned with European time zone 
• No bureaucracy or micromanagement – transparent and fast decision-making 
• Direct product impact – your work ships quickly and is visible in production 
• Real ownership – influence architecture and technical direction 
• Unlimited paid vacation and paid sick leave 
• Company-provided equipment 
• Premium AI tools subscription (ChatGPT, Copilot, Claude) 
• Professional growth – opportunity to own a technical domain or lead a module as the company scales 
• Competitive compensation starting from $6,000

If you want to build an AI-native CRM from the ground up and be part of the core team shaping the product, we’d love to hear your story. 

Apply or reach out directly – let’s build something truly transformative together. 

TJHelpers is committed to developing strong engineering teams through mentorship, real project experience, and our “Helpers as a Service” model. We provide structured growth, hands-on practice, and a supportive environment where engineers can evolve quickly and meaningfully.

We are looking for a Senior Fullstack Developer (Technical Consultant) to join our team and help design, build, and scale modern web products across fintech, AI, telecommunications, healthcare, automation, and other fast-growing domains.

This role is ideal for an engineer who is equally confident working across frontend and backend development, participates in hands-on implementation, and contributes to architecture, technical planning, and consulting-driven engineering decisions.

Responsibilities

• Design, develop, and maintain scalable frontend and backend solutions for modern web applications 
• Build and improve user-facing features, APIs, integrations, and business logic 
• Participate in architecture design, technical planning, and engineering decision-making 
• Develop responsive, maintainable, and scalable frontend applications using modern frameworks and reusable component architecture 
• Build reliable backend services, APIs, and integrations using scalable backend technologies and integration patterns 
• Work with databases, external services, and third-party platforms 
• Collaborate closely with product, design, QA, DevOps, and engineering teams 
• Improve system performance, maintainability, scalability, security, and user experience 
• Participate in and lead code reviews, technical discussions, and engineering best practices initiatives  
• Diagnose and resolve complex issues in products and production environments 
• Transform product requirements into practical technical solutions and architectural decisions 
• Contribute to long-term technical strategy and platform evolution 

Requirements

• Strong commercial experience as a Fullstack Developer with hands-on work across both frontend and backend systems 
• Strong knowledge of modern JavaScript and/or TypeScript 
• Experience with frontend frameworks such as React, Next.js, Vue, or similar technologies 
• Understanding of frontend architecture, state management, and scalable UI patterns 
• Experience developing backend services and APIs using Node.js/TypeScript, Java, .NET, or similar backend technologies 
• Strong understanding of REST APIs, integrations, authentication, and client-server architecture 
• Experience working with relational and/or NoSQL databases 
• Understanding of software architecture principles, component-based design, and maintainable application structure 
• Experience with cloud platforms such as AWS, GCP, or Azure 
• Experience with Docker, testing, debugging, Git, and CI/CD pipelines 
• Ability to work independently, make technical decisions, and clearly communicate trade-offs and architectural choices 
• Strong problem-solving skills with a focus on reliability, maintainability, and production quality 
• English level: B2 or higher 

Nice to Have

• Familiarity with Kubernetes and modern deployment workflows 
• Experience with GraphQL, messaging systems, or event-driven architecture 
• Understanding of frontend performance optimization and modern rendering approaches 
• Understanding of performance optimization, observability, and production support practices 
• Experience with design systems, frontend architecture, or scalable UI platforms 
• Familiarity with AI products, data-intensive systems, or third-party platform integrations 
• Experience participating in technical consulting, solution design, or tech leadership initiatives 

What We Offer

• Work on real-world products across multiple industries and domains 
• Opportunity to participate in technical discovery, architecture, and solution design 
• Collaboration with strong engineers, tech leads, architects, and product teams 
• Clear growth path toward Tech Lead, Solution Architect, or Engineering Lead roles 
• Open engineering culture focused on ownership, transparency, and continuous improvement 
• Long-term projects, flexible schedule, and fully remote work opportunities

Проєкт комерційних закупівель компанії E-Tender запрошує в свою Команду Full Stack Developer`а, яка/ий підсилить технічну команду та працюватиме над  розвитком платформи комерційних закупівель.

 Requirements: 

• 2+ years experience 
• C#; .NET Framework; 
• ASP.NET MVC + Web API; 
• Entity Framework; 
• MS SQL Server + SQL Profiler; 
• Message queues(Preffered RabbitMQ Masstransit); 
• Elasticsearch; 
• Angular 2+; 
• Angular centralized state management / ReactiveX / NgRx / RxJS; 
• Git; 
• Javascript/TypeScript + DOM; 
• HTML, CSS, SASS; 
• Experience with Jira or other project management systems, use Time Tracker. 

Responsibilities: 

• Implementation of new features of company projects in a timely and professional manner; 
• Close cooperation with project team members; 
• Use Jira, Time tracker; 
• Perform other related duties as required; 
• Front end/back end 50/50. 

WHO WE ARE 

Amplifa is a 1-year-old bootstrapped startup. Our primary product is an agent that finds leads and books meetings with potential customers for European industrial manufacturers. We are a tight, super productive team based in Dusseldorf and Tel Aviv. 

This role will work directly with the CTO and have substantial responsibility and input within the company. 

During the hiring process we will communicate clearly and quickly with you about next steps. Our goal is to find the right person to join our team for the long term, as quickly as possible. 

IS THIS YOU? 

The right person to join our team is a full-stack human. You aren't stuck in the code, you understand the product. You combine technical expertise with great communication skills, can work independently, and take pride in building stuff that people actually use.

• True full-stack developer 
• Comfortable with UI, backend, databases, and basic devops 
• Take pride in owning complex features from end to end 
• Loves building 
• Excellent written communication in English 
• Has strong opinions on the best way to work with coding agents 
• Experience implementing AI features at scale in production apps 
• Experience in Rails or similar frameworks
• Good vibes

INTERVIEW PROCESS 

1. INITIAL APPLICATION - Submit your resume and a 1-minute video (via text field in application!). In the video, introduce yourself and tell us about what you found most interesting/exciting in your most recent project. It doesn’t need to be perfect production, just be yourself. 
    
2. MAIN INTERVIEW - If you seem like a good candidate, we will then send you a link to book a 1-hour interview, which will include both general questions and a short technical screening. 
    
3. TAKEHOME ASSIGNMENT - If you pass the interview, you will receive an (interesting!) takehome assignment, with token budget. It should not take more than 6 hours. 
    
4. FINAL INTERVIEW - If you complete the takehome assignment to spec, you’ll do a final (brief) get-to-know you interview with the other founders, and we will discuss salary and onboarding. 

About the role
We are looking for a Software Engineer to join our team working on AI-powered pharma industry products. You will work across two core platform products — building backend services, APIs, and AI-powered features, and shipping the frontend side of your work in React + TypeScript. You will work closely with the product owner, frontend developers, QA, DevOps, and biologists.

Must-haves

• A completed university degree in Computer Science, Software Engineering, or a related technical field (Bachelor’s or higher).
• Strong algorithmic thinking — solid data-structures foundation, able to reason about complexity and design correct, efficient solutions rather than only wiring frameworks.
• ~4+ years of production experience building backend services in Python (FastAPI or a similar async framework) with PostgreSQL / SQLAlchemy.
• Hands-on experience with AI-assisted / agentic development (Claude Code or similar) — and the ability to configure and tune these tools, not just use them out of the box; you can explain where you trust them and how you verify their output.
• Practical experience with MCP (Model Context Protocol) and RAG (retrieval-augmented generation, embeddings, vector search).
• Comfortable shipping features in React + TypeScript — you can build and wire up UI without a frontend engineer holding your hand.
• Solid with Docker and Git-based workflows; understand how services run in Kubernetes.

• English(B1-B2) sufficient to work in an English-language codebase and team.

   

Tech Stack

• Core: Python 3.10+, FastAPI, async/await, SQLAlchemy 2.0, Alembic
• Frontend: React 18, TypeScript, Vite
• Database: PostgreSQL, DuckDB, vector search (embeddings)
• AI/LLM: Claude Code, MCP (Model Context Protocol), RAG pipelines
• Infrastructure: Docker, Kubernetes, Redis (FastStream)
• Storage: Parquet
• Orchestration: Temporal, Argo (nice to have)
• CI/CD: GitOps, ArgoCD, GitLab CI
• Observability: structured logging, metrics, distributed tracing

• Tools: Git, Jira, Confluence

   

Nice-to-have (not required)

• Experience with workflow orchestration (Temporal, Argo, Airflow) or message-driven architectures.
• Building your own MCP servers, or productionising LLM apps (evals, guardrails, cost/latency tuning).
• Data/analytics tooling (DuckDB, Parquet) or a scientific/chemistry background.

• GitOps / CI experience (ArgoCD, GitLab CI).

   

What you’ll do

• Design and ship async REST APIs in FastAPI so researchers can run screening, manage projects, and explore results.
• Integrate backend services with our compute-orchestration layer so long-running docking and screening jobs are durable and observable.
• Drive features with an AI-first workflow: plan and implement with Claude Code, then critically review, test, and verify what the agent produces before it ships.
• Model and evolve the PostgreSQL schema (SQLAlchemy 2.0, Alembic), shipping safe migrations as the product grows — with the team’s support on the trickier zero-downtime changes.
• Build and integrate the AI layer — MCP tools and RAG pipelines (embeddings, vector search) that power our in-product AI Agent — with evals, guardrails, and retrieval quality treated as part of the feature, because the agent informs scientific decisions.
• Build async, event-driven services: Redis/FastStream for lightweight service-to-service events
• Ship the frontend side of your features in React 18 + TypeScript (Vite) — wiring UI to the APIs you build
• Keep your services observable and reliable in production: structured logging, metrics, and distributed tracing across async services and Temporal workflows
• Review peers’ code — including AI-generated code — as part of how the team keeps quality high.
   

Domain knowledge 

• Basic understanding of molecular biology — proteins, DNA/RNA, small molecules
• Experience in biotech, pharma, or life sciences software is a strong plus
  
  Soft skills
• Attention to detail
• Proactive communication — if something is unclear, asks immediately
• Ability to work independently and manage own workload

Junior AI Automation Engineer — B2B contract, remote
 

UAIN Solutions is an AI and automation services company working with organisations across the UK, Benelux, and Nordic markets. We deliver process automation, Agentic AI, Microsoft Power Platform, and UiPath solutions end-to-end, as a lean team of senior practitioners.
 

This is a B2B engagement, not employment: you will invoice UAIN Solutions as an independent contractor.
 

What you will do

You will write Python and C#, build workflows in UiPath and Microsoft Power Platform, and integrate AI-powered steps using LLM and agent tooling. You take scoped deliverables and are accountable for the result. Deliverables are accepted when they are tested, documented, and do what the requirement asked. How you get there is your call. Scope and rates grow with demonstrated capability.

• Build, test, and maintain automation components in Python, C#, UiPath, and Microsoft Power Platform.
• Write clean, documented code and use Git properly from your first commit.
• Use AI tools, including Claude, as part of your engineering workflow.
• Integrate automations with cloud services and APIs on AWS, Google Cloud, or Microsoft Azure.
• Debug failures, and escalate with a clear account of what you have already tried.
• Take part in code review, and observe client discovery sessions and demos.
   

Required

• Python. You can write clear functions, handle errors, work with APIs and data structures, and read someone else's code.
• C#. The language and object-oriented fundamentals. Study, personal projects, or professional work all count.
• UiPath Academy certificate of completion(test task) — mandatory. Complete the Automation Developer Associate Training learning plan on UiPath Academy and include your certificate with your application. The course is self-paced and free at the time of writing. Applications without a certificate are not reviewed. 
  https://academy.uipath.com/learning-plans/automation-explorer
• Cloud. Foundational knowledge of AWS, Google Cloud, or Microsoft Azure: core services, compute and storage, and how applications authenticate and connect.
• English, B1 minimum, written and spoken.
• Development basics: version control, testing, and documentation.

The stack: Python, C#, UiPath, Power Automate, Power Platform, AWS / Google Cloud / Azure, Claude and Azure OpenAI, SQL, REST APIs, Git, n8n and Make. We do not expect all of it on day one.
 

Nice to have

• Automations you have already built in UiPath or Power Platform, including university or personal projects.
• Exposure to LLM APIs, prompt engineering, or AI agent frameworks.
• SQL, REST APIs, JSON, or Git-based team workflows.
• Experience with n8n, Make, Zapier, or Power Automate.
• A GitHub profile or portfolio.
   

How we work

Five things run through everything we do, and we look for them in the people we contract with: proactivity, responsibility, ownership, curiosity, and a result-oriented approach. In practice: you raise problems early, you finish what you start, you treat what you build as yours, and you measure yourself by what shipped.
 

What we offer

• Live automation and Agentic AI projects for enterprise clients in the UK, Benelux, and Nordics.
• Access to senior engineers for code review and technical feedback.
• Funded certifications relevant to the engagement, subject to approval.
• Scope and rates that grow with demonstrated capability, up to Middle and Senior level.
• Remote by default, with optional access to our planned Lviv workspace, plus the tools, licences, and system access you need to deliver.
• A market rate for your demonstrated skill level. We discuss the rate during the interview and do not ask about your pay history.
   

How to apply

Apply through Djinni with two things in your message:

1. A motivation letter. Tell us what motivates you and why you want to work with automation and AI, and tell us about achievements you are proud of. We highly value a personalised message; generic or templated letters are unlikely to progress.
2. Your UiPath Academy certificate of completion (test task) — attach it or include a link. Mandatory.
    

We review applications on a rolling basis and will be in touch if there is a strong match. We are looking forward to working with you.
 

This description is not an offer and does not form part of any contract. Any engagement is governed by a separate written services agreement. We use the personal data in your application only to assess you for this engagement; you can request access, correction, or deletion at any time. Please do not include your date of birth, a photo, marital status, or health information.

 🚀 Project Description

From the engineering side, this role is focused on Frontend + Three.js 3D visualization as the primary skillset, with Full-Stack (Angular/Node) as a secondary skillset. You'll work on our Angular SPA that renders interactive clinical 3D scan viewers (jaw mesh cleanup, ML segmentation overlays, tooth landmark editing, 2D/3D arch setup) backed by a thin Express + SQLite API.

✅ You are:

- Have practical experience from commercial projects, pet projects, hackathons, or open-source contributions

- Confident with JavaScript/TypeScript and a component framework (Angular preferred; React/Vue okay)

- Have hands-on experience with Three.js or raw WebGL (scenes, cameras, geometries, materials, raycasting)

- Comfortable consuming and building REST APIs

- Understand reactive/state patterns (RxJS or equivalent) and component-based architecture

- Have some backend experience (Node.js/Express or similar)

- Familiar with Git workflows, code review, and writing basic tests

➕ Will be a plus:

- Experience with mesh manipulation, BVH raycasting (e.g. `three-mesh-bvh`), or CAD/3D-viewer tooling

- Familiarity with WebGL shaders/GLSL

- Experience with SQLite or other embedded/lightweight databases

- Familiarity with Docker and containerized local dev stacks

- Experience with Karma/Jasmine and/or Playwright

- Interest or background in medtech, healthcare, or scientific/CAD visualization

- Comfortable working with AI platforms and developer tools such as Cursor, Claude Code, or Codex

♟️ What We Expect from You:

- Use modern AI tools, frameworks, and approaches to work faster and more effectively

- Make practical decisions that help us launch faster without unnecessary overengineering

- Proactively flag rendering/performance issues and UX gaps, and propose fixes

- Be comfortable working in an evolving product with changing priorities and early-stage ambiguity

🔑 Responsibilities:

- Build and enhance Three.js-based clinical viewers (scan cleanup, segmentation, tooth landmarks, 2D/3D occlusal arch setup)

- Implement Angular components and services following existing project conventions

- Contribute to the Express API (routes/services/repositories) when a feature needs full-stack changes

- Write and maintain unit (Karma/Jasmine) and end-to-end (Playwright) tests for new workflow states

- Actively collaborate with the team lead and team

- Utilize AI to review pull requests and contribute to engineering best practices

🍩 What we offer:

- Opportunity to work on an innovative product in the medical-tech domain

- High ownership and direct impact on product UX and technical decisions

- Flexible work hours within the European time zone

- A fast-moving environment where strong engineers can influence product and technical decisions

- Paid 200$+ AI assistants and modern engineering tooling

- Professional development support, latest courses and certifications

- 20 business days of vacation

- 5 sick leave days

- National holidays covered

🗣 Recruitment process:

Technical Task → AI Live Coding Task → Cultural-Fit Interview → Offer

Required languages

English B1 - Intermediate

SBC Performance drives scalable growth for brands ready to expand globally.

Working across eCommerce, health & wellness, education, and entertainment, our team helps brands acquire customers faster and scale across 26+ global markets. We combine data-driven paid media, performance creative, and advanced analytics to turn marketing into a predictable revenue engine.
Trusted by 200+ companies, managing $150M+ in ad spend.

Scale faster. Grow smarter.

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/Warsaw or remote
• 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

We are looking for a pragmatic Fullstack Engineer for a project-based role with a strong product mindset to build responsive, production-ready web applications by blending solid engineering practices with cutting-edge AI tooling.

If you thrive in environments with evolving or ambiguous requirements, take deep personal ownership of the code you ship, and possess a sharp critical eye for AI-generated output - we’d love to have you on our team!

Responsibilities:

• Architect and build responsive, maintainable, and production-ready frontend features using React and TypeScript.
• Implement complete product functionality from the client layer to API integration, data transfer, authentication, and server-side interactions.
• Utilize modern AI development tools alongside technical requirements to accelerate project delivery and increase overall velocity.
• Rigorously review, test, debug, and refine AI-generated frontend and backend code, taking personal accountability regardless of the backend stack.
• Build intuitive AI-facing user experiences (AI UX) and integrate LLM APIs centered around end-user product needs.

Requirements:

• Upper-Intermediate level of English.
• Strong experience with Node.js and/or Python, React, TypeScript, and modern frontend development.
• Experience with backend frameworks such as NestJS, Express.js, Fastify, FastAPI, Django, or Flask
• Hands-on experience with the React ecosystem: Next.js, Vite, React Router, TanStack Query, Redux Toolkit/Zustand, React Hook Form, Zod/Yup.
• Good understanding of REST API design (GraphQL experience is a plus).
• Strong SQL knowledge and experience with RDBMS: PostgreSQL, MySQL, MariaDB, or MS SQL Server.
• Experience with ORMs and query builders: Prisma, TypeORM, Sequelize, SQLAlchemy, Django ORM, or similar.
• Experience with NoSQL or caching tools: MongoDB, Redis, DynamoDB, or similar.
• Experience with message queues and event systems: RabbitMQ, Kafka, AWS SQS/SNS, Redis Streams, or similar.
• Strong Git knowledge, including branching, pull requests, code reviews, and merge/rebase workflows.
• Experience with Docker, CI/CD, and cloud platforms such as AWS, GCP, or Azure.

AI-Related Skills:

• Practical experience using AI development tools such as GitHub Copilot, ChatGPT/Codex, Cursor, Claude Code, or JetBrains AI.
• Ability to review, test, and safely use AI-generated code.
• Experience integrating LLM APIs is a plus: OpenAI, Azure OpenAI, Anthropic, Gemini, AWS Bedrock, or similar.
• Understanding of embeddings, vector databases, semantic search, and RAG.
• Experience with vector databases is a plus: Pinecone, Qdrant, Weaviate, Milvus, Chroma, or pgvector.
• Familiarity with AI frameworks/tools is a plus: LangChain, LangGraph, LangSmith, LlamaIndex, Semantic Kernel.
•  

What We Offer:

• Format: 100% remote. You manage your own schedule and work from anywhere in the world — we value delivered results and met deadlines over time tracking or fixed hours.
• Work on cutting-edge projects combining modern Web architecture with AI technologies.
• A modern digital environment with fast decision-making, pragmatic processes, and clear, structured communication. We value your time as a professional and respect work-life balance.
• Access to premium developer tooling and AI infrastructure.

Looking for a senior developer for a US EdTech client: they have an LMS platform (Next.js, Node.js, TypeScript) and working AI personalization prototypes - vector database, embeddings, semantic search, agent workflows. The job is to take these prototypes to production and own the technical thinking, not just close tickets.

What you'll do:

• Move personalization prototypes (embeddings, semantic search) into their production Next.js apps
• Maintain and extend their Claude Code agent skills pipeline (code review, QA, deploy automation)
• Review architecture and push back where it's wrong - the client explicitly wants this

• Join client calls 

   

Requirements:

• Senior-level TypeScript / Next.js / Node.js
• Production experience with embeddings and semantic search (you can explain when to extract attributes into filterable fields vs keeping them in embeddings)
• Daily hands-on work with Claude Code or similar AI dev tooling
• Spoken English for client video calls - hard requirement; their team will talk to you directly

• 30+ hrs/week availability

   

Same person for the whole project, no handoffs. Possible extension after 3 months - the client has a steady pipeline of AI work.

Develop and maintain modern full-stack applications using Python and Angular.
Build new features while improving and maintaining existing applications.
Design and implement REST APIs and integrate third-party services.
Develop and optimize AI-powered chatbot solutions using modern LLM frameworks.
Collaborate with architects, DevOps engineers, and product teams in an agile Scrum environment.
Deploy and maintain applications using Docker, Kubernetes, OpenShift, and GitLab pipelines.
Ensure applications are secure, scalable, and production-ready.
Participate in architecture discussions, code reviews, and technical planning.
Contribute to infrastructure, security, and AI integration initiatives.

What We're Looking For

5+ years of professional full-stack software development experience.
Strong Python development experience (Java is a plus).
Experience with Angular 21 or newer.
Experience designing and integrating REST APIs.
Hands-on experience with Docker, Kubernetes, and OpenShift.
Experience working with PostgreSQL.
Familiarity with GitLab, Helm, Jira, and Confluence.
Experience working with agile teams, preferably Scrum.
Good German language skills and fluent English.
Nice to have: experience with LangChain, LangGraph, MCP, or A2A.
Nice to have: experience building LLM-powered chatbot solutions.
Nice to have: knowledge of prompt engineering and OpenAI integrations.
Nice to have: understanding of AI application security, including content moderation, guardrails, rate limiting, and spam protection.
Nice to have: experience with network infrastructure and application security.
Nice to have: knowledge of cloud-native application architecture

English- C1+

A potential invitation to potential minds!

4K-Soft is People. People are most important to us. People are at the heart of every connection we build. Come and join 4K-Soft, where human minds come together to pave the way for the future. We offer a variety of full-time jobs, training programs and internships. Only imagine, how you can help our company and start your career with 4K-Soft!

We are looking for a Middle FullStack Web Developer.

What we expect from you:
English level: B2 or higher
Experience: 3+ years working with Node.js and React

We offer:

Competitive level of remuneration

Convenient work schedule, paid vacation and sick leaves

The opportunity to grow professionally by participating in the implementation of interesting and complex projects, as well as showing personal initiative.

A potential invitation to potential minds!

4K-Soft is People. People are most important to us. People are at the heart of every connection we build. Come and join 4K-Soft, where human minds come together to pave the way for the future. We offer a variety of full-time jobs, training programs and internships. Only imagine, how you can help our company and start your career with 4K-Soft!

We are looking for a Strong Junior FullStack Web Developer.

What we expect from you:

2+- years of commercial experience:
 

• Node.js
• React
• PostgreSQL

We offer:
 

Competitive level of remuneration

Modern comfortable office or remote work

Convenient work schedule, paid vacation and sick leaves

The opportunity to grow professionally by participating in the implementation of interesting and complex projects, as well as showing personal initiative.

Responsibilities

• Maintain and extend existing functionality in a large legacy PHP 7.4 codebase.
• Design and implement robust solutions for bug fixes, new features, and technical debt reduction.
• Optimize database queries and schema design using PostgreSQL.
• Refactor old modules and participate in gradual modernization plans.
• Collaborate with DevOps and QA to ensure system stability and deployment continuity.
• Participate in technical discussions, code reviews, and architecture planning.
• Work closely with cross-functional teams including product managers and front-end developers.

Requirements

• 5+ years of experience with PHP, including work with legacy systems (ideally PHP 7.x).
• Strong proficiency with PostgreSQL or similar relational databases.
• Deep understanding of object-oriented programming, software design patterns, and MVC architecture.
• Experience with RESTful APIs and integration of third-party services.
• Solid front-end skills with JavaScript and at least one modern framework (React or Vue.js).
• Version control with Git.
• Strong debugging and performance profiling skills.

Nice to Have

• Knowledge of Python for scripting or integration purposes.
• Experience working with SOAP web services and legacy protocols.
• Familiarity with WebSockets and TCP socket-level communication.
• Exposure to systems migration, re-architecture, or code modernization projects.

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