Jobs Python

What is this project about?

This long-term fintech project is dedicated to simplifying taxes, tax refunds, and tax incentives in the US market. Our platform seamlessly integrates software and dedicated tax professionals to optimize users’ R&D tax credit services — supporting finance and tax-related business logic that has helped businesses claim billions of dollars in tax credits and incentives. Users simply upload their data, the platform performs analyses and generates the necessary tax forms, allowing clients to maximize their benefits efficiently.

What is the team size and structure?

You will be working in close collaboration with Senior Engineers, and communicate directly with the client, Lead, and PM from our side.

Hard skills

• 5+ years of professional backend development experience;
• Deep expertise in Python programming; strong experience with FastAPI or similar frameworks;
• Solid understanding of relational databases, particularly PostgreSQL;
• Strong knowledge of software design patterns and architecture best practices;
• Experience with RESTful API design and development;
• Experience with cloud platforms (preferably Azure);
• Experience with microservices architecture and containerization (Docker);
• Familiarity with Git-based workflows, CI/CD processes, and code reviews;
• Experience integrating third-party services and APIs (e.g., Salesforce, NetSuite);
• Experience with automated testing frameworks;
• Proven ability to build scalable, performant, and secure backend applications;
• Upper-Intermediate English level or higher.
   

Responsibilities

• Design, build, and maintain efficient, reusable, and reliable backend code in Python;
• Develop RESTful APIs and backend services integral to the Unified Partner Portal;
• Ensure seamless integration with platforms like Salesforce and NetSuite;
• Collaborate with front-end developers, UI/UX designers, product owners, and stakeholders to translate requirements into technical solutions;
• Develop rigorous automated tests to ensure system reliability and robustness;
• Optimize API performance and database queries for scalability, security, and maintainability;
• Monitor application performance and troubleshoot issues using observability tools (e.g., Datadog);
• Mentor and provide technical guidance to junior and mid-level developers;
• Document technical designs and processes clearly and comprehensively.
  
  How many stages of the interview are there?
• Interview with the Recruiter – up to 30 min.;
• Tech interview on our side – up to 1 hour.;
• Tech interview on our client side – up to 1 hour.

We’re looking for a Technical (Python) Support Engineer to keep our production applications stable and fast during weekend shifts. You’ll handle incident triage, bug fixes, and small improvements while collaborating with the core team when escalation is needed.

Shift on Saturday & Sunday options (choose one):

• 07:00–13:00
• 13:00–19:00
• 19:00–01:00
• 01:00-07:00
   

What you’ll do

• Maintain and troubleshoot Python/Django web applications
• Debug and optimize database performance (PostgreSQL)
• Operate core AWS services (EC2, S3)
• Diagnose issues with cross-functional teams and implement quick fixes
• Keep code changes clean, documented, and secure
• Handle end-user requests and provide technical assistance

What we’re looking for:

• English: Upper-Intermediate or higher
• Experience: 6+ months with Python & Django OR no commercial experience but:
  • Completed relevant courses/bootcamps (Python, Django, Databases, AWS)
  • Strong fundamentals (data types, HTTP/REST, Git, basic Linux, debugging)
  • Hands-on projects (pet projects, labs, internships) — GitHub links welcome
• Solid knowledge of PostgreSQL (or another relational DB)
• Basic familiarity with AWS (EC2, S3)
• Strong analytical and debugging skills
• Basic understanding of REST APIs and front-end basics (HTML, CSS, JavaScript)
• Clear communicator; comfortable working independently and in a team

Nice to have

• Docker, Kubernetes, and CI/CD pipelines
• Web application security best practices
• Experience in an Agile environment
   

What we offer

• Paid part-time weekend shifts
• Flexible choice of shift blocks
• Supportive team and transparent processes
• Fast track to real production experience

About the Project

We are building a specialized platform for managing clinical trials, helping medical research sites launch and run studies in full compliance with regulatory requirements. The centerpiece of the system is an AI engine that reads complex medical protocols (100–400+ page documents) and automatically converts them into structured, actionable workflows — visit schedules, patient eligibility criteria, regulatory tasks, and more.

Tech stack: Python 3.14, FastAPI, SQLModel, PostgreSQL + pgvector, LangChain, LangGraph, deployed via Docker Compose.

What You'll Be Working On

AI & NLP:

• Architect and continuously improve RAG pipelines for parsing medical documents
• Optimize LangChain pipelines for speed, modularity, and cost-efficiency
• Implement dynamic model selection (LLM, VLM, NER) based on task complexity
• Ensure reproducibility and transparency of AI decisions (traceability, version tracking)
• Enhance vector search capabilities via pgvector

Backend & Data:

• Design PostgreSQL schemas for complex clinical entities
• Maintain a full audit trail in line with regulatory standards (GxP)
• Improve query performance and transactional reliability

Reliability & Testing:

• Set up structured logging and monitoring for ML tasks and pipelines
• Expand automated test coverage (unit, integration, NLP validation tests)
• Support computerized system validation (CSV) readiness

DevOps:

• Maintain Docker infrastructure and CI/CD pipelines
• Ensure system scalability across multiple studies and sites

What We're Looking For

Must Have:

• 5+ years of hands-on experience with Python, FastAPI, and SQLAlchemy
• Proven experience designing microservices and containerized deployments
• Deep knowledge of PostgreSQL
• Experience with Celery, Redis, and RabbitMQ
• Practical experience with LangChain and vector databases
• Solid understanding of embedding models, AI orchestration, and prompt engineering
• Background in regulated industries (healthcare, fintech, or similar)

Nice to Have:

• Experience building AI systems in GxP environments
• Familiarity with Ruff, Poetry, and pre-commit hooks
• Track record of scaling and re-architecting existing systems

One Thing to Note

We are specifically looking for engineers with real production experience building and refactoring AI/NLP systems — not just prototype experimentation. You will collaborate closely with an ML Architect, ML Engineer, Business Analyst, and QA team.

We are looking for a skilled and proactive Middle Python Developer to join our team on an initial freelance basis (with full-time potential) and contribute to an innovative project in the AI and LLM domain for a US-based client. As a Middle Python Developer, you will play a key role in building robust backend applications, developing high-quality software solutions, and collaborating with a cross-functional Scrum team to deliver exceptional results. The ideal candidate is proficient in Python development and backend architecture, excels at time management in dynamic environments with strict deadlines, and possesses excellent written and verbal communication skills in English.

Requirements
 

• Bachelor’s degree in Computer Science or related field OR equivalent experience;
• 2+ years of experience building applications using Python;
• Working experience with FastAPI (Flask/Django experience is transferable);
• Good knowledge of relational databases (SQLite, PostgreSQL) and SQLAlchemy: data modeling, schema design, writing efficient queries;
• Hands-on experience with AI tools in the development workflow (Claude Code, Cursor, GitHub Copilot, or similar code assistants);
• Experience using LLMs for generating realistic, internally consistent mock/synthetic datasets;
• Experience with AI image generation tools (Vertex AI, Stable Diffusion, DALL-E, or similar);
• Experience with code quality tooling (Ruff, linters) and writing clean, maintainable, well-structured code;
• Ability to learn new technologies quickly.
• At least Upper-intermediate

Nice to have
 

• Experience with geospatial data (coordinates, boundaries, spatial queries);
• Experience with prompt engineering and structuring LLM outputs (JSON mode, schemas);
• Experience with monorepo tooling (Nx, pnpm workspaces) and uv;
• Familiarity with OpenAPI schema design for typed client generation.

What will you get:
Career growth & projects
• Competitive salary based on your skills and experience, and a benefits package.
• Regular performance appraisals to support your career development.
• Professional development support: online courses, certifications, and study compensation (including English courses).
• A modern tech stack across challenging, long-term projects.

Health & well-being
• Paid vacation (18 working days) and sick leave (15 days).
• VIP medical insurance or sports coverage.

Work environment & flexibility
• Remote work from anywhere in the world or in one of our offices in Kyiv, Lviv, or Warsaw.
• Coworking compensation.
• Necessary equipment to perform your work.

Culture & community
• A collaborative and open culture where contributions are recognized.
• Regular corporate online & offline activities.
• Geniusee Charity Fund, making a difference beyond tech.

About Us

We’re building a mental wellness app designed to deliver personalised, accessible, and impactful support to users worldwide. Our mobile app is already live and growing fast, and we’re now looking for a talented Backend Developer to join our team and help take the product to the next level.

The Role

You'll own and evolve the server-side logic that powers our apps — designing and shipping APIs consumed by mobile and web clients, strengthening our microservices ecosystem, and helping us scale reliably and securely. You'll work closely with frontend and mobile engineers, DevOps, and product.

Key Responsibilities
 API & Auth
 

• Design and maintain RESTful APIs for iOS, Android, and web
• Build high-throughput async endpoints
• Implement JWT auth flows and OAuth 2.0 social login (Apple, Google)

Microservices & Architecture
 

• Develop and maintain core services: User, Content, Tracking, Analytics, Notification
• Design stateless, fault-tolerant services for horizontal scaling
• Contribute to Golang services for high-concurrency analytics and notification dispatch

Database & Caching
 

• Write optimized PostgreSQL queries; design schema migrations indexes
• Implement time-based table partitioning for analytics and journal data
• Configure PgBouncer pooling, read/write splitting, and materialized views
• Build and invalidate multi-layer Redis caches (sessions, content metadata, preferences)

Integrations
 

• Apple HealthKit (sleep, HRV, mindful minutes, activity sync)
• In-app purchases: App Store API and Google Play Billing verification
• Push notifications via Firebase Cloud Messaging (iOS & Android)
• Stripe for web subscription payments; Amazon Polly for TTS in meditations

Security & GDPR
 

• GDPR features: data export (JSON), 30-day automated deletion, consent management
• AES-256-GCM encryption for sensitive mental health data fields
• Enforce TLS 1.3, HSTS, Perfect Forward Secrecy; contribute to RBAC and audit logging

DevOps & Quality
 • Maintain Dockerfiles and multi-stage build configs; participate in GitLab CI/CD pipeline
 • Support blue-green deployments and canary rollouts (10% traffic routing)
 • Write unit, integration, and contract tests using pytest

Requirements
Must Have
 • 5+ years backend development in Python
 • Confident working with the Flask and FastAPI frameworks.
 • Experience with Golang, JavaScript, and HTML.
 • VPS management skills on AWS: initial setup, application deployment, performance optimization, updates, security, and monitoring.
 • Experience working with Elasticsearch.
 • Strong PostgreSQL skills: schema design, query optimization, indexing, migrations
 • Redis for caching, session management, and rate limiting
 • JWT authentication, OAuth 2.0, and security best practices
 • Experience with pytest and contributing to CI/CD pipelines
 • Comfortable working in a Docker-based microservices environment
 • Knowledge of GDPR requirements and privacy-by-design practices
 • Proficiency with Git and collaborative workflows (GitFlow)

AI & Automation

• Strong understanding of AI-powered development workflows and modern AI tools
• Experience using AI-assisted coding tools such as ChatGPT, Claude, GitHub Copilot, Cursor, and Lovable
• Ability to leverage AI tools to improve development speed, debugging, documentation, testing, and code quality
• Understanding of AI integrations, LLM APIs, prompt engineering, and AI-assisted automation workflows
• Experience working with AI-generated code while maintaining high standards for security, scalability, and maintainability
 

About Us

We’re building a mental wellness app designed to deliver personalised, accessible, and impactful support to users worldwide. Our mobile app is already live and growing fast, and we’re now looking for a talented Backend Developer to join our team and help take the product to the next level.

The Role

You'll own and evolve the server-side logic that powers our apps — designing and shipping APIs consumed by mobile and web clients, strengthening our microservices ecosystem, and helping us scale reliably and securely. You'll work closely with frontend and mobile engineers, DevOps, and product.

Key Responsibilities
 API & Auth
 

• Design and maintain RESTful APIs for iOS, Android, and web
• Build high-throughput async endpoints
• Implement JWT auth flows and OAuth 2.0 social login (Apple, Google)

Microservices & Architecture
 

• Develop and maintain core services: User, Content, Tracking, Analytics, Notification
• Design stateless, fault-tolerant services for horizontal scaling
• Contribute to Golang services for high-concurrency analytics and notification dispatch

Database & Caching
 

• Write optimized PostgreSQL queries; design schema migrations indexes
• Implement time-based table partitioning for analytics and journal data
• Configure PgBouncer pooling, read/write splitting, and materialized views
• Build and invalidate multi-layer Redis caches (sessions, content metadata, preferences)

Integrations
 

• Apple HealthKit (sleep, HRV, mindful minutes, activity sync)
• In-app purchases: App Store API and Google Play Billing verification
• Push notifications via Firebase Cloud Messaging (iOS & Android)
• Stripe for web subscription payments; Amazon Polly for TTS in meditations

Security & GDPR
 

• GDPR features: data export (JSON), 30-day automated deletion, consent management
• AES-256-GCM encryption for sensitive mental health data fields
• Enforce TLS 1.3, HSTS, Perfect Forward Secrecy; contribute to RBAC and audit logging

DevOps & Quality
 • Maintain Dockerfiles and multi-stage build configs; participate in GitLab CI/CD pipeline
 • Support blue-green deployments and canary rollouts (10% traffic routing)
 • Write unit, integration, and contract tests using pytest

Requirements
Must Have
 • 5+ years backend development in Python
 • Confident working with the Flask and FastAPI frameworks.
 • Experience with Golang, JavaScript, and HTML.
 • VPS management skills on AWS: initial setup, application deployment, performance optimization, updates, security, and monitoring.
 • Experience working with Elasticsearch.
 • Strong PostgreSQL skills: schema design, query optimization, indexing, migrations
 • Redis for caching, session management, and rate limiting
 • JWT authentication, OAuth 2.0, and security best practices
 • Experience with pytest and contributing to CI/CD pipelines
 • Comfortable working in a Docker-based microservices environment
 • Knowledge of GDPR requirements and privacy-by-design practices
 • Proficiency with Git and collaborative workflows (GitFlow)

AI & Automation

• Strong understanding of AI-powered development workflows and modern AI tools
• Experience using AI-assisted coding tools such as ChatGPT, Claude, GitHub Copilot, Cursor, and Lovable
• Ability to leverage AI tools to improve development speed, debugging, documentation, testing, and code quality
• Understanding of AI integrations, LLM APIs, prompt engineering, and AI-assisted automation workflows
• Experience working with AI-generated code while maintaining high standards for security, scalability, and maintainability

About Us

We’re building a mental wellness app designed to deliver personalised, accessible, and impactful support to users worldwide. Our mobile app is already live and growing fast, and we’re now looking for a talented Backend Developer to join our team and help take the product to the next level.

The Role

You'll own and evolve the server-side logic that powers our apps — designing and shipping APIs consumed by mobile and web clients, strengthening our microservices ecosystem, and helping us scale reliably and securely. You'll work closely with frontend and mobile engineers, DevOps, and product.

Key Responsibilities
 API & Auth
 

• Design and maintain RESTful APIs for iOS, Android, and web
• Build high-throughput async endpoints
• Implement JWT auth flows and OAuth 2.0 social login (Apple, Google)

Microservices & Architecture
 

• Develop and maintain core services: User, Content, Tracking, Analytics, Notification
• Design stateless, fault-tolerant services for horizontal scaling
• Contribute to Golang services for high-concurrency analytics and notification dispatch

Database & Caching
 

• Write optimized PostgreSQL queries; design schema migrations indexes
• Implement time-based table partitioning for analytics and journal data
• Configure PgBouncer pooling, read/write splitting, and materialized views
• Build and invalidate multi-layer Redis caches (sessions, content metadata, preferences)

Integrations
 

• Apple HealthKit (sleep, HRV, mindful minutes, activity sync)
• In-app purchases: App Store API and Google Play Billing verification
• Push notifications via Firebase Cloud Messaging (iOS & Android)
• Stripe for web subscription payments; Amazon Polly for TTS in meditations

Security & GDPR
 

• GDPR features: data export (JSON), 30-day automated deletion, consent management
• AES-256-GCM encryption for sensitive mental health data fields
• Enforce TLS 1.3, HSTS, Perfect Forward Secrecy; contribute to RBAC and audit logging

DevOps & Quality
 • Maintain Dockerfiles and multi-stage build configs; participate in GitLab CI/CD pipeline
 • Support blue-green deployments and canary rollouts (10% traffic routing)
 • Write unit, integration, and contract tests using pytest

Requirements
Must Have
 • 5+ years backend development in Python
 • Confident working with the Flask and FastAPI frameworks.
 • Experience with Golang, JavaScript, and HTML.
 • VPS management skills on AWS: initial setup, application deployment, performance optimization, updates, security, and monitoring.
 • Experience working with Elasticsearch.
 • Strong PostgreSQL skills: schema design, query optimization, indexing, migrations
 • Redis for caching, session management, and rate limiting
 • JWT authentication, OAuth 2.0, and security best practices
 • Experience with pytest and contributing to CI/CD pipelines
 • Comfortable working in a Docker-based microservices environment
 • Knowledge of GDPR requirements and privacy-by-design practices
 • Proficiency with Git and collaborative workflows (GitFlow)

AI & Automation

• Strong understanding of AI-powered development workflows and modern AI tools
• Experience using AI-assisted coding tools such as ChatGPT, Claude, GitHub Copilot, Cursor, and Lovable
• Ability to leverage AI tools to improve development speed, debugging, documentation, testing, and code quality
• Understanding of AI integrations, LLM APIs, prompt engineering, and AI-assisted automation workflows
• Experience working with AI-generated code while maintaining high standards for security, scalability, and maintainability

• Project Description:

  One of the world's largest providers of products and services to the energy industry requires the development, support, and integration of software systems in the Oil & Gas domain. These systems include capabilities such as data acquisition from hardware and software components, machine control, cloud connectivity, process automation, and user interaction. You will be part of a cross-functional team. The project is stable, long-term, and continually adopts new technologies. The project follows the SCRUM methodology.

• Responsibilities:

  Design, develop, and maintain backend services and RESTful APIs using Python and Flask
  • Implement messaging solutions with RabbitMQ and MQTT
  • Work with MongoDB and Redis for efficient data storage and caching
  • Develop robust and scalable features using multithreading
  • Write clean, maintainable, and well-documented code with proper version control using Git
  • Containerize applications and manage development environments using Docker
  • Ensure code quality through unit testing (e.g., pytest) and participate in code reviews
  • Collaborate with team members using Azure DevOps and other Azure services
  • Monitor and troubleshoot system performance, contributing to continuous improvement efforts

• Mandatory Skills Description:

  • Python 2+ year of experience
  • RabbitMQ, MQTT
   • Multithreading
   • REST API
   • Docker
   • Git
   • Unit Testing: Pytest

• Nice-to-Have Skills Description:

  Azure (e.g., Azure DevOps, Azure Deck)
  OpenAPI
  asyncio / aiohttp
  numpy/pandas

• Languages:
  • English: B2 Upper Intermediate
  • Ukrainian: C2 Proficient

We are looking for a Senior Software Engineer for our client, a US-based wellness-tech startup building an AI-powered platform for salons and wellness centers.

The product combines machine learning, recommendation systems, diagnostics, eCommerce, and operational tooling into a single ecosystem used by real businesses and customers.

The platform analyzes customer data and questionnaire inputs to generate personalized treatment and product recommendations through a custom AI service built with Python, ML models, and Elasticsearch. The engineering team is continuously improving recommendation accuracy, integrating new AI capabilities, and scaling the infrastructure as the product grows.

This is an opportunity to join a small, product-focused team where engineering has direct impact on the business and where developers are expected to contribute across the entire platform, from AI integrations and backend architecture to cloud infrastructure and customer-facing features.

Responsibilities

* Maintain and improve a Python-based AI recommendation service

* Integrate and improve ML/AI models in production environments

* Improve Elasticsearch-based recommendation and search logic

* Continuously improve recommendation accuracy based on business requirements and user data

* Develop backend services using Node.js / TypeScript

* Build frontend functionality using React

* Manage AWS infrastructure and deployment workflows

* Improve CI/CD and overall platform reliability

* Work on integrations with external systems including Shopify

* Participate in architecture decisions and long-term technical planning

Tech Stack

Python, TensorFlow (or similar ML frameworks), Elasticsearch / OpenSearch, TypeScript, Node.js / NestJS, React, AWS, PostgreSQL, Redis, Docker, GitHub Actions / CI/CD.

Requirements

* Strong commercial experience with Python

* Experience working with TensorFlow or similar machine learning frameworks

* Experience integrating AI/ML models into production systems

* Strong experience with Elasticsearch, OpenSearch, or Solr

* Strong experience with TypeScript and Node.js

* Experience building frontend applications with React

* Strong AWS experience

* Experience with Docker, Linux, and CI/CD workflows

* Strong understanding of APIs and backend architecture

* Experience working in startup or product-focused environments

* Advanced English communication skills

Nice to Have

* Experience with recommendation engines or AI-powered personalization systems

* Shopify integration experience

* Experience with Terraform, CloudFormation, or AWS CDK

* Native Android development experience (Kotlin preferred)

* Experience using AI coding assistants such as GitHub Copilot, Cursor, Claude Code, etc.

What They’re Looking For

The company is looking for a long-term engineering hire who can take ownership of the product and help lead the technical development of the platform as the company scales.

The immediate priorities are heavily focused on the AI recommendation service, ML integrations, and Elasticsearch-based recommendation infrastructure. Over time, the engineer will also contribute across backend development, infrastructure, integrations, and overall platform evolution.

One of the world's largest providers of products and services to the energy industry requires the development, support, and integration of software systems in the Oil & Gas domain. These systems include capabilities such as data acquisition from hardware and software components, machine control, cloud connectivity, process automation, and user interaction. You will be part of a cross-functional team. The project is stable, long-term, and continually adopts new technologies. The project follows the SCRUM methodology.

• Responsibilities:

  Design, develop, and maintain backend services and RESTful APIs using Python and Flask
  • Implement messaging solutions with RabbitMQ and MQTT
  • Work with MongoDB and Redis for efficient data storage and caching
  • Develop robust and scalable features using multithreading
  • Write clean, maintainable, and well-documented code with proper version control using Git
  • Containerize applications and manage development environments using Docker
  • Ensure code quality through unit testing (e.g., pytest) and participate in code reviews
  • Collaborate with team members using Azure DevOps and other Azure services
  • Monitor and troubleshoot system performance, contributing to continuous improvement efforts

• Mandatory Skills Description:

  • Python 2+ year of experience
  • RabbitMQ, MQTT
   • Multithreading
   • REST API
   • Docker
   • Git
   • Unit Testing: Pytest

• Nice-to-Have Skills Description:

  Azure (e.g., Azure DevOps, Azure Deck)
  OpenAPI
  asyncio / aiohttp
  numpy/pandas

Numerical Technologies LTD is a leading provider of custom software solutions and services specializing in risk, limits, and regulatory capital systems. We are currently looking for a Junior/Middle Python Developer to join our team.

What will you be doing?

As part of the team, you will be participating in a project with a large US bank. You will be helping build new software features, support, and maintain existing ones. You will be writing scalable and fault-tolerant code, debugging programs, and integrating applications with internal and third-party services. You will be collaborating closely with the product team to understand the system’s functional and non-functional requirements and contribute to code quality through unit testing, integration testing, code reviews, and system design using Python to build robust software that aligns with business needs.

What are we looking for?

• 1+ years of commercial experience with Python and good understanding of OOP principles.
• Good knowledge of data structures and algorithms.
• Experience with FastAPI or other Python web frameworks.
• Experience working with SQL databases.
• Strong problem-solving skills and ability to collaborate effectively in a team environment.
• Bachelor’s degree or higher.

Nice to have: 

• Background in quantitative finance, mathematics, or risk modeling.

What we offer:

• Competitive compensation depending on experience and skills.
• Regular assessments and salary reviews.
• Paid personal days.
• Mental health support program.
• Language classes.
• Flexible working schedule.

We're looking for a Founding AI Full Stack Engineer to help build and scale an AI-powered legal platform. The ideal candidate has strong experience with Python, TypeScript (Next.js), and full-stack product development, and is excited about solving complex problems using modern AI technologies.

Please note: strong Python skills are required. Hands-on experience with LLMs, AI agents, workflow automation, or retrieval-based systems is highly preferred. Startup experience and ownership mindset are big pluses.

Requirements

• 7+ years of professional software engineering experience.
• Strong full-stack development skills, particularly with Next.js, TypeScript, and Python.
• Solid understanding of system architecture, APIs, and data modeling.
• Experience building and maintaining cloud-based solutions (AWS preferred).
• Ability to work independently in fast-changing environments and make sound technical decisions.
• Product-oriented mindset with a focus on delivering user value.
• Active use of AI development tools such as Claude, Codex, or similar.
• Strong communication skills and ability to explain technical concepts to non-technical stakeholders.
• Interest in understanding legal processes and applying technology to improve them.

Responsibilities

Product Development

• Develop and deliver full-stack features from backend architecture to user-facing interfaces.
• Collaborate with founders and customers to translate complex requirements into practical solutions.
• Take ownership of features throughout the entire development cycle, from planning to deployment and optimization.

Platform & Infrastructure

• Design and maintain scalable backend services and APIs.
• Build document processing systems for extracting and organizing legal data.
• Develop search capabilities that provide instant access to case-related information.
• Manage cloud infrastructure and monitoring on AWS.

AI & Automation

• Create AI agents that collect and structure client information.
• Build automated document generation workflows.
• Develop systems that learn from historical legal data to improve legal processes.

Nice to Have

• Experience working at an early-stage startup.
• Familiarity with AI agent architectures, retrieval systems, and workflow orchestration.
• Background in LegalTech, FinTech, or other regulated SaaS industries.
• Understanding of legal operations such as contracts, corporate formation, employment, or IP.

About ChatRevenue.ai 

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 

We are looking for a Principal Backend Engineer with strong Python experience and a proven track record of building and owning production backend systems. 

This is a hands-on engineering role focused on: 

• Python backend 
• FastAPI 
• Data-heavy systems 
• AI / LLM product features 
• System architecture and scalability 

We are looking for someone who can take ownership of a backend domain, make technical decisions, and build reliable systems from idea to production. 

What you will do 

• Design, build, deploy, and maintain core backend services using Python and FastAPI 
• Own backend architecture, data flows, and technical decisions in your domain 
  Build and scale data-intensive systems, integrations, and pipelines 
• Work on AI / LLM-driven product features together with the engineering team 
• Improve system performance, scalability, reliability, and observability 
• Contribute to engineering practices: testing, CI/CD, security, and code quality 
• Work closely with product and engineering to deliver high-impact features 

What we are looking for 

• 7+ years of hands-on backend development experience 
• Strong commercial experience with Python in production 
• Python should be your primary backend language 
• Strong experience with FastAPI, APIs, Docker, Git, and CI/CD 
• Experience owning backend systems end-to-end: architecture, performance, data, reliability 
• Strong knowledge of PostgreSQL and data-heavy systems  
• Experience building distributed, scalable, or high-load systems 
• Good understanding of system design and performance optimization 
• Ability to work with ambiguity and take ownership without micromanagement 
• High ownership, independence, and product mindset 

Nice to have 

• Experience integrating LLMs / AI into backend systems 
• Experience with RAG, embeddings, vector databases, or AI assistants 
• Experience with Kafka, Azure Event Hub, or other event-driven systems 
• Experience with Kubernetes and cloud infrastructure, especially Azure 
• Experience building ETL / ELT pipelines 
• Experience working with structured and unstructured data 
• Production observability, tracing, monitoring, and optimization experience 

This role is likely a strong match for people who 

• Enjoy owning backend systems end-to-end, not just implementing isolated tasks 
• Feel strongest in Python as their main backend language 
• Have worked on production systems where reliability, performance, and scale matter 
• Want to have direct influence on technical decisions and architecture 
• Are comfortable working in an early-stage, high-ownership environment 

What we offer 

• Remote-first setup 
• Flexible schedule aligned with European time zones 
• A core engineering role in an AI-native product 
• Direct influence on technical decisions and architecture 
• Real ownership and visible product impact 
• Opportunity to grow into technical leadership / domain ownership 

If you have strong Python backend fundamentals, experience owning production systems, and interest in AI-native products, we’d love to talk. 

We work with startups and established companies to create products in healthcare, fintech, eCommerce, and AI. This role offers real variety — new domains, evolving challenges, and steady professional growth instead of being locked into a single legacy system.

If you’re motivated by fast learning and building features that go live, this might be the right place for you.
 

What You'll Do

• Design and implement scalable backend solutions and contribute to architecture decisions
• Own features end-to-end — from technical discussion to production deployment
• Work closely with the client’s team on project tasks in English
• Optimize performance and improve existing systems
• Take responsibility for production stability and code quality

What We Work With

⚡ Python, FastAPI, Django, Pydantic, PostgreSQL, uv, Ruff

Gets You Extra Points

• Confident communication skills for requirement clarification
• Familiar with SQLModel, Alembic
• Used AI coding tools (Cursor, Claude Code) in daily workflow
• Practical experience working with AI/LLM integrations in real projects
• Experience working on production-ready applications
• Experience with full-stack development using React

What You Bring

• 1+ years of commercial backend development experience
• Strong knowledge of Python
• Solid understanding of REST APIs
• Experience working with SQL databases
• Ability to work independently and take ownership
• English: Upper-Intermediate (B2+) or higher — confident spoken and written communication with clients

What You Get

Work & Growth:

• Fully remote, flexible hours
• Structured code reviews
• Senior engineers who help you level up
• English practice sessions

Compensation:

• Salary in USD
• Performance reviews twice a year
• 15 days paid vacation + sick leave

We run a B2B data platform for the entertainment industry — it tracks talent, who represents them, the deals they're doing, and the data surrounding all of it. The product is established and has been around for almost 10 years with paying customers; we're not a pre-launch startup.
 

We're rebuilding the platform from Symfony/Angular to Django and React, and we're hiring a senior developer to lead the rebuild — owning the architecture, setting technical direction, and assigning and reviewing work for our current developer. After the rebuild ships, you'll stay on as the long-term owner of the system. 

This is a permanent role, not a contract that ends with the migration.

We want more than a ticket-taker. You should understand the business logic behind what you're building, push back when a requirement doesn't match how users actually work, and drive architecture decisions.

Must have

• 6+ years of professional Python/Django experience
• Strong experience building REST APIs with Django REST Framework
• Has built and shipped systems from scratch, and owned a codebase long-term
• Experience with data-heavy applications (large datasets, complex querying, migrations)
• Comfortable leading: planning work, delegating tasks, and reviewing another developer's code
• Strong written and spoken English — you'll work directly with non-technical stakeholders
• 4+ hours of daily overlap with US Eastern time
• Advanced English speaking

Nice to have

• Hands-on React experience (our frontend stack)
• Experience rebuilding or migrating legacy systems (Symfony familiarity a bonus)
• Django Admin customization
• Third-party API integrations