Senior Python Developer

🏢 Summary: Backend Developer role focused on building and evolving a large-scale platform using Domain-Driven Design and Clean Architecture. The position involves designing business logic, creating secure REST APIs and WebSocket services, and working with event-driven architectures over Kafka. You will contribute to a complex production system using modern Python practices and AI-assisted development tools. 🗂️ Requirements: 3–5 years commercial experience with Python (3.10+), Production experience with FastAPI, Django, or Flask, Strong knowledge of design patterns and maintainable, testable code principles, Habitual use of fully type-hinted Python, Experience building secure REST APIs and knowledge of OWASP Top 10, Production experience with one relational and one NoSQL database, Experience with asynchronous or concurrent programming, Production experience with message queue or streaming platform, Proficiency with Docker and docker-compose, Experience using AI coding assistants in daily development 📃 Skills: Python, FastAPI, Django, Flask, Kafka, RabbitMQ, SQS, Celery, Redis, MongoDB, DynamoDB, SQL, Docker, asyncio, REST, WebSocket, OWASP, GitHubCopilot 🏢 Description: Exciting projects. Great atmosphere. Personal growth. Merixstudio. What you'll do We are looking for a collaborative developer who deeply cares about architecture, maintainability, and security. You’ll join our experienced team on a large, established backend platform built with Domain-Driven Design, Clean Architecture, and event-driven workflows over Kafka. In this role, you will design business logic, build modern REST APIs and WebSocket services, and leverage AI-assisted development tools to deliver real business value. Navigating a complex, existing system is an exciting growth opportunity for you, and you’ll expand your skills through direct mentorship from senior engineers and robust code reviews. Who you are (requirements) You have 3–5 years of commercial experience in developing web applications using Python (3.10+). Proficiency and production experience with at least one Python framework (FastAPI, Django, or Flask). You are familiar with design patterns and principles of delivering high-quality, maintainable, and testable code. You write fully type-hinted Python as a matter of habit and respect existing patterns over personal preference in codebases with explicit layer separation. You know how to build modern, secure, and efficient APIs and you are aware of common web security pitfalls (OWASP Top 10). Production experience and knowledge of at least one relational and one non-relational/NoSQL database (MongoDB, DynamoDB, Redis, etc.). Comfortable with concurrent or asynchronous programming concepts (task queues, async/await) and possess production experience with at least one message queue or streaming platform (Kafka, RabbitMQ, SQS, Celery, Redis Streams, etc.). You are proficient with Docker and docker-compose. AI-Assisted Development: You work effectively and are comfortable using AI coding assistants (GitHub Copilot, Cursor, Windsurf, Claude Code, etc.) as part of daily development. You are fluent in both spoken and written English and Polish. What we'd like to see: Production experience with FastAPI specifically, as well as production async Python experience (asyncio, async/await, async testing). Exposure to Domain-Driven Design (DDD) or Clean Architecture in a previous role. Experience with MongoDB schema design and aggregation pipelines, as well as production experience with Kafka or another streaming platform. Strong ability to write unit and integration tests (including when behavior spans services or storage), debug applications, and familiarity with CI/CD pipelines. Knowledge of AWS services (EC2, ECS, S3, SQS, Lambda). Experience with WebSocket-based real-time systems. Experience giving constructive code review feedback to help the team grow. Additionals: one-time home office bonus - 1000 PLN net free medical care flexible working hours 100% remote work or hybrid model: if you want, we have a great office in Poznań!

🏢 Summary: The offer is for a Python Backend Engineer to build and maintain scalable backend services and REST APIs in a collaborative product environment. The role focuses on developing clean, well-tested code and contributing to architecture and code quality from day one. It is a fully remote position with flexible contract options and long-term international projects. 🗂️ Requirements: 3+ years of professional Python experience, Strong knowledge of FastAPI, Django, or Flask, Experience with PostgreSQL, Experience with REST API design, Proficiency with Git, Experience with pytest, Experience with CI/CD workflows 📃 Skills: Python, FastAPI, Django, Flask, PostgreSQL, REST, Git, pytest, CI/CD, AWS, GCP, Azure, Docker, Kubernetes, Kafka, Redis, RabbitMQ, Poetry, uv 🏢 Description: About the role We're looking for a Python backend engineer to join a client team and build reliable, scalable services from day one. Responsibilities Design and maintain Python-based backend services and REST APIs Write clean, tested, well-documented code Collaborate with product and DevOps teams on feature delivery Participate in code reviews and architecture discussions Requirements 3+ years of professional Python experience Solid knowledge of FastAPI, Django, or Flask Experience with PostgreSQL and RESTful API design Comfortable with Git, pytest, and CI/CD workflows Good written and spoken English Nice to have AWS, GCP, or Azure Docker / Kubernetes Kafka, Redis, or RabbitMQ Poetry or uv for dependency management pre-commit hooks and code quality tooling We offer B2B contract or employment contract (umowa o pracę / umowa zlecenie) — flexible on the form Fully remote, flexible setup Long-term engagements with international clients Dedicated recruiter support through onboarding

🏢 Summary: The offer is for a Senior Python Backend Engineer to design and maintain scalable, cloud-native backend systems on AWS, including REST APIs and AI/LLM integrations. The role focuses on distributed systems, asynchronous processing, observability, and high code quality within a modern CI/CD environment. It involves working with both serverless and containerized deployments in a collaborative, agile team. 🗂️ Requirements: 3–5+ years of professional Python backend development experience, Experience building cloud-native systems on AWS, Strong knowledge of REST API design and OpenAPI, Experience with asynchronous processing and queue-based architectures, Hands-on experience with core AWS services (Lambda, API Gateway, S3, IAM, ECS/EKS, CloudWatch), Knowledge of DynamoDB and NoSQL data modelling, Knowledge of PostgreSQL, SQL, and relational data modelling, Experience with serverless and containerized deployments, Experience integrating external APIs and third-party services, Experience with automated testing using pytest, Familiarity with CI/CD tools, Understanding of distributed systems, scalability, and reliability, Practical understanding of LLM-based or AI-driven applications, Ability to apply SOLID principles and clean code practices, Fluent English (written and spoken) 📃 Skills: Python, AWS, FastAPI, Pydantic, SQLAlchemy, boto3, REST, OpenAPI, Celery, SQS, Lambda, ECS, EKS, S3, CloudFront, IAM, SecretsManager, CloudWatch, DynamoDB, PostgreSQL, SQL, pytest, GitHubActions, Jenkins, NewRelic, Docker, Kubernetes, LLM, Cursor, Claude, Copilot 🏢 Description: We are looking for a Senior Python Backend Engineer with experience in building cloud-native backend systems on AWS. This role is focused on designing, developing, and maintaining scalable Python services, integrating AI/LLM-based capabilities, working with distributed systems, and ensuring high reliability, observability, and code quality. Your responsibilities: Design, build, and maintain backend services using Python in an AWS-based environment. Develop and maintain REST APIs together with clear OpenAPI documentation. Implement asynchronous processing and queue-based communication between services. Design data access patterns for application features using NoSQL and SQL storage. Integrate backend services with internal systems, external APIs, and AI/LLM-based components. Implement reliable communication patterns, including retries, timeouts, and circuit breakers. Build and maintain operational CLI tooling for day-to-day platform tasks (e.g. content ingestion). Contribute to architectural decisions across software and infrastructure as the stack evolves. Create observability for distributed systems, including logging, metrics, tracing, and alerting. Write automated tests and support high code quality across the backend codebase. Contribute to CI/CD processes and deployment automation. Collaborate with product, frontend, QA, DevOps, AI/ML teams, and content creators. Review code, share knowledge, and raise the bar for engineering practice across the team. We are looking for you, if you have: 3–5+ years of professional experience in Python backend development. Solid understanding of REST API design and OpenAPI standards. Experience with asynchronous processing and queue-based architectures, e.g. Celery, SQS. Experience with libraries and frameworks such as FastAPI, Pydantic, SQLAlchemy, boto3. Hands-on experience with core AWS services such as Lambda, API Gateway, S3, CloudFront, Secrets Manager, IAM, ECS/EKS, CloudWatch, etc. Good knowledge of DynamoDB and NoSQL data modelling. Good knowledge of PostgreSQL, SQL, and relational data modelling . Experience with both serverless (Lambda) and containerized (ECS/EKS) deployment models. Experience integrating with external APIs and third-party services. Experience with pytest and automated testing practices. Familiarity with CI/CD tools such as GitHub Actions and/or Jenkins. Experience with observability tools such as New Relic and CloudWatch. Understanding of distributed systems, scalability, reliability, and fault tolerance. Ability to apply SOLID principles, clean code practices, and common design patterns. Practical understanding of LLM-based applications or AI agentic frameworks. Ability to use AI development tools such as Cursor, Claude Code, or GitHub Copilot. Experience working in agile software development teams. Fluent English, both written and spoken. We offer: Participation in interesting and demanding projects. Flexible working hours. A great, non-corporate atmosphere. Possibility to work remote or hybrid (2 days per week from the office). Opportunities for development and promotion. Attractive package of benefits. We reserve the right to contact the selected candidates.

🏢 Summary: Oferta dotyczy roli Python Backend Developera odpowiedzialnego za rozwój i utrzymanie aplikacji opartych o architekturę mikroserwisową z wykorzystaniem REST API i technologii cloud-native. Zakres obejmuje projektowanie architektury, integracje z systemami zewnętrznymi, automatyzację testów oraz dbanie o jakość, bezpieczeństwo i wydajność kodu. Praca odbywa się w modelu zdalnym z elastycznymi godzinami i długofalową współpracą. 🗂️ Requirements: Minimum 5 lat komercyjnego doświadczenia w Pythonie, Znajomość Django, Znajomość Flask, Znajomość FastAPI, Doświadczenie z REST API, Znajomość Linux, Doświadczenie z WebSocket, Znajomość Jenkins, Znajomość GitLab, Znajomość GitHub Actions, Znajomość Grafana, Znajomość Prometheus, Doświadczenie z architekturą mikroserwisową, Znajomość relacyjnych baz danych, Wykształcenie wyższe informatyczne lub pokrewne, Język angielski minimum B2 📃 Skills: Python, Django, Flask, FastAPI, REST, Linux, WebSocket, Jenkins, GitLab, GitHub, Grafana, Prometheus, PostgreSQL, MySQL, MSSQL, Docker, Kubernetes, SQL, Redis, Elasticsearch, JavaScript, OWASP, Scrum 🏢 Description: MUST-HAVE: Min. 5 lat doświadczenia komercyjnego w programowaniu w Pythonie. Django Flask/Fast API REST API Linux WebSocket Jenkins/Gitlab/Github Actions monitoring (Grafana/Prometheus) mikroserwisy relacyjne bazy danych (PostgreSQL/MySQL/MS SQL Server) wyższe wykształcenie (informatyka lub pokrewne) Angielski na poziomie min. B2 NICE-TO-HAVE: Bazy danych NoSQL (Elasticsearch, Redis) Znajomość standardów OWASP Top 10 JavaScript O projekcie (cel, harmonogram, zespol) Poszukujemy doświadczonego Python Backend Developera do rozwoju i utrzymania nowoczesnych aplikacji opartych o architekturę mikroserwisową. Osoba na tym stanowisku będzie odpowiedzialna za projektowanie i implementację nowych funkcjonalności, rozwój REST API, integrację z systemami zewnętrznymi oraz optymalizację wydajności aplikacji. Projekt wykorzystuje technologie Python (Django/FastAPI/Flask), relacyjne bazy danych (PostgreSQL/MySQL), Docker, Kubernetes oraz rozwiązania CI/CD. Istotnym elementem pracy jest współtworzenie architektury systemu, udział w code review, tworzenie testów automatycznych oraz dbanie o jakość i bezpieczeństwo kodu zgodnie z dobrymi praktykami (SOLID, DRY, KISS, OWASP). Na co dzień będziesz współpracować z zespołem Scrum, uczestniczyć w planowaniu prac, analizie wymagań biznesowych oraz wspierać mniej doświadczonych programistów poprzez mentoring i dzielenie się wiedzą. Obowiazki na stanowisku Projektowanie, implementacja i utrzymanie aplikacji backendowych w Pythonie. Udział w projektowaniu architektury systemu i analiza rozwiązań technicznych. Proponowanie i wdrażanie rozwiązań dla problemów technicznych i biznesowych. Implementacja testów automatycznych. Udział w przeglądach kodu (code review). Dbanie o czytelność, wydajność i bezpieczeństwo kodu. Projektowanie i implementacja rozwiązań bazodanowych (SQL). Przygotowywanie i utrzymywanie konfiguracji Docker oraz Kubernetes. Integracja aplikacji z systemami zewnętrznymi (REST API, systemy kolejkowe). Udział w pracach zespołu scrumowego (estymacja, planowanie, backlog). Przygotowywanie i aktualizacja dokumentacji technicznej i architektonicznej. Współpraca z zespołem przy analizie wymagań i wdrażaniu zmian. Wsparcie techniczne zespołu oraz mentoring młodszych programistów. Identyfikacja ryzyk technicznych i proponowanie sposobów ich ograniczenia. Optymalizacja wydajności aplikacji backendowych. Co przekona kandydata do oferty? Praca zdalna (okazjonalne wizyty w biurze w Warszawie) Elastyczne godziny pracy (start od 7:00 do 9:00) Długofalowa współpraca (minimum na rok)

🏢 Summary: Senior Full Stack Developer role focused primarily on backend development with Python and FAST API, combined with React-based frontend work in a hybrid B2B model. The position involves designing scalable web applications, building high-performance APIs, and working with relational and NoSQL databases. Strong backend expertise is essential, with intermediate frontend skills and experience in modern DevOps practices. 🗂️ Requirements: 8+ years of professional software development experience, Expert proficiency in Python, Strong experience with FAST API, Strong knowledge of relational and NoSQL databases, Experience with SQLAlchemy ORM, Deep understanding of data structures and algorithms, Experience building RESTful APIs and microservices, Proficiency in writing unit and integration tests in Python, Strong knowledge of ReactJS and NodeJS, Experience with Redux or MobX, Familiarity with React Query, Experience with Material UI, CSS, and HTML, Experience with Jest and Cypress, Solid understanding of JavaScript and TypeScript 📃 Skills: Python, FASTAPI, SQLAlchemy, PostgreSQL, MySQL, MongoDB, DynamoDB, ReactJS, NodeJS, Redux, MobX, ReactQuery, MaterialUI, CSS, HTML, Jest, Cypress, JavaScript, TypeScript, Docker, Kubernetes, AWS, Azure, GCP, RabbitMQ, Kafka 🏢 Description: Working mode: Hybrid mode ( 2-3 days in a week from the office in Wroclaw or Warsaw) Experience Level: 8+ Years Contract Type: B2B About the Role We are looking for a highly skilled Senior Full Stack Developer with a primary focus on Python and FAST API to join the development team. The ideal candidate is a Python expert capable of architecting robust backend services. While React skills are required, we are flexible regarding the depth of frontend expertise (Intermediate level is acceptable), provided the backend strength is exceptional. Key Responsibilities Backend Architecture: Design, develop, and maintain scalable web applications using Python and FAST API . API Development: Build high-performance RESTful APIs and microservices, ensuring low latency and high availability. Database Management: Work with relational and NoSQL databases, utilizing ORMs like SQLAlchemy to design efficient database schemas and queries. Frontend Development: Develop and maintain user-facing features using ReactJS , ensuring the technical feasibility of UI/UX designs. Code Quality: Write clean, maintainable, and testable code; perform unit testing to ensure robustness. DevOps: Implement and manage CI/CD pipelines to streamline deployment processes. Collaboration: Work closely with cross-functional teams (Product, QA, and Design) in a hybrid working environment. Mandatory Technical Skills 1. Backend (Core Strength): Languages: Expert proficiency in Python . Frameworks: Strong experience with FAST API (Must-have). Experience with SQLAlchemy is highly preferred. Fundamentals: Deep understanding of data structures, algorithms, and space-time complexity. Database: Strong understanding of Relational (e.g., PostgreSQL, MySQL) and NoSQL (e.g., MongoDB, DynamoDB) databases. Testing: Proficiency in writing unit tests and integration tests for Python applications. 2. Frontend (Intermediate Level): Libraries: Strong knowledge of ReactJS and NodeJS . State Management: Experience with React workflows such as Redux or MobX . Tooling: Familiarity with React Query . Styling: Experience with Material UI , CSS , and HTML . Testing: Experience with frontend testing tools like Jest and Cypress . JavaScript: Solid understanding of JavaScript , TypeScript , and browser rendering behavior. Good to Have Experience with cloud platforms (AWS, Azure, or GCP). Knowledge of containerization (Docker, Kubernetes). Understanding of microservices architecture and message queues (RabbitMQ, Kafka).

🏢 Summary: B2B contract for a Senior Python Backend Developer to design, build, and maintain scalable backend systems in a fully remote environment (Poland-based). The role focuses on developing production-grade services and APIs using Python and FastAPI, with end-to-end ownership of features. You will contribute to microservices architecture and asynchronous processing solutions. 🗂️ Requirements: Minimum 5 years of commercial experience, Strong experience with Python, Strong experience with FastAPI, Experience building backend systems and APIs, Experience with RESTful services, Experience with microservices architecture, Experience with messaging or queue systems, Hands-on experience in production environments, Ability to work independently, Ability to manage tasks end-to-end 📃 Skills: Python, FastAPI, REST, Microservices, API, Queues, Messaging, Async, Backend 🏢 Description: Location: 100% Remote (candidates must be located in Poland) Start Date: ASAP /  2 weeks Contract Type: B2B via Experis About the Role We are looking for an experienced Python Backend Developer to join our team and contribute to building and maintaining scalable backend systems. You will work on production-grade solutions and take ownership of features end-to-end. Key Responsibilities Design and develop backend services using Python and FastAPI Build and maintain REST APIs and microservices architectures Work with queues and asynchronous processing Support and improve production systems Take ownership of tasks from concept to delivery (end-to-end) Collaborate with cross-functional teams in a fully remote setup Requirements Minimum 5 years of experience Strong experience with Python and FastAPI (mandatory) Proven track record in building backend systems and APIs Experience with RESTful services, microservices, and messaging/queue systems Hands-on experience working on production environments Ability to work independently and manage tasks end-to-end Strong problem-solving and communication skills What We Offer Access to Medicover healthcare Multisport card E-learning platform access Group life insurance

🏢 Summary: Backend Python Developer role focused on building scalable applications and REST services for banking and financial sector projects. The position involves designing, developing, and optimizing backend systems, databases, and cloud-based solutions in a modern Python ecosystem. Opportunity to work on large-scale systems using cloud and container technologies. 🗂️ Requirements: 3–4 years commercial experience as Python Developer, Strong knowledge of Python, Experience with Django and/or FastAPI, Practical experience designing and implementing REST API, Experience with PostgreSQL, Knowledge of SQL, Experience with Docker, Experience with AWS and/or Microsoft Azure, Ability to build scalable and high-performance backend systems 📃 Skills: Python, Django, FastAPI, REST, PostgreSQL, SQL, Docker, AWS, Azure 🏢 Description: O projekcie Poszukujemy Python Developera do realizacji nowoczesnych projektów dla sektora bankowego i finansowego. Będziesz uczestniczyć w tworzeniu skalowalnych aplikacji, usług backendowych oraz rozwiązań wykorzystujących technologie chmurowe i przetwarzanie danych. Jeżeli interesujesz się nowoczesnym ekosystemem Python, architekturą mikroserwisową oraz chcesz rozwijać swoje kompetencje w projektach o dużej skali biznesowej – zapraszamy do naszego zespołu. Twój zakres obowiązków Projektowanie, rozwój i utrzymanie aplikacji backendowych w Pythonie Tworzenie i rozwijanie REST API Projektowanie oraz optymalizacja baz danych Integracja systemów wewnętrznych i zewnętrznych Współpraca z zespołami analitycznymi, testerskimi oraz DevOps Tworzenie dokumentacji technicznej Udział w code review oraz dbanie o wysoką jakość kodu Współpraca w środowisku Agile/Scrum Nasze wymagania Minimum 3–4 lata doświadczenia komercyjnego jako Python Developer Bardzo dobra znajomość Python Doświadczenie w pracy z Django i/lub FastAPI Praktyczna znajomość projektowania i implementacji REST API Doświadczenie w pracy z PostgreSQL Znajomość SQL Doświadczenie z Docker Znajomość usług chmurowych AWS i/lub Microsoft Azure Umiejętność tworzenia wydajnych i skalowalnych rozwiązań backendowych Znajomość języka angielskiego na poziomie B2–C1 Mile widziane Doświadczenie w obszarze Machine Learning Znajomość technologii LLM (Large Language Models) Doświadczenie z PyTorch Znajomość MLflow Doświadczenie w pracy z Apache Airflow Znajomość baz danych NoSQL Doświadczenie w projektach związanych z analizą danych lub sztuczną inteligencją Doświadczenie w sektorze bankowym lub finansowym Oferujemy Udział w innowacyjnych projektach dla sektora finansowego i bankowego Możliwość pracy zdalnej lub hybrydowej Elastyczne godziny pracy Stabilną współpracę przy długoterminowych projektach Możliwość rozwoju kompetencji w obszarze AI, Machine Learning i technologii chmurowych Dostęp do nowoczesnych technologii oraz najlepszych praktyk inżynierii oprogramowania Współpracę z doświadczonym zespołem specjalistów Atrakcyjne wynagrodzenie adekwatne do doświadczenia Jeżeli chcesz rozwijać zaawansowane rozwiązania backendowe, pracować z nowoczesnymi technologiami Python oraz zdobywać doświadczenie w projektach wykorzystujących AI i chmurę – zapraszamy do aplikowania.

🏢 Summary: Oferta dotyczy rozwoju nowoczesnych aplikacji backendowych w Pythonie oraz tworzenia i utrzymywania REST API w środowisku chmurowym i kontenerowym. Rola obejmuje projektowanie architektury, wdrażanie aplikacji z użyciem Dockera oraz współpracę przy rozwoju nowych funkcjonalności i code review. Poszukiwany jest developer z doświadczeniem w Pythonie, technologiach chmurowych oraz pracy w środowisku Linux. 🗂️ Requirements: Minimum 2 lata doświadczenia komercyjnego w Pythonie, Znajomość frameworków REST API: FastAPI, Flask lub Django, Praktyczna znajomość Docker i Docker Compose, Doświadczenie z Microsoft Azure, AWS lub GCP, Znajomość środowiska Linux i linii poleceń, Umiejętność pisania skryptów Bash, Znajomość sieci komputerowych, HTTP i architektury REST 📃 Skills: Python, FastAPI, Flask, Django, Docker, Azure, AWS, GCP, Linux, Bash, HTTP, REST, TypeScript, React 🏢 Description: Python Developer Do naszego zespołu szukamy Python Developera , który będzie rozwijać nowoczesne aplikacje backendowe oraz współtworzyć rozwiązania działające w środowisku chmurowym. Twoje zadania Projektowanie i rozwój aplikacji backendowych w Pythonie. Tworzenie oraz rozwijanie REST API. Wdrażanie i utrzymywanie aplikacji w środowiskach kontenerowych (Docker). Współpraca z zespołem przy projektowaniu architektury oraz rozwoju nowych funkcjonalności. Udział w code review oraz dbanie o jakość kodu. Nasze wymagania Minimum 2 lata komercyjnego doświadczenia w programowaniu w Pythonie. Doświadczenie z jednym z frameworków do budowy REST API, np. FastAPI, Flask lub Django . Praktyczna znajomość Docker oraz Docker Compose . Doświadczenie z platformą Microsoft Azure (preferowane) lub innym dostawcą usług chmurowych, takim jak AWS lub Google Cloud Platform (GCP) . Swobodne poruszanie się w środowisku Linux , w tym znajomość linii poleceń. Umiejętność pisania skryptów w Bash . Dobra znajomość zagadnień związanych z sieciami komputerowymi, protokołem HTTP oraz architekturą REST . Mile widziane Doświadczenie w pracy z TypeScript . Znajomość React . Szukamy osoby, która potrafi samodzielnie rozwiązywać problemy i proponować rozwiązania, dba o jakość kodu i dobre praktyki programistyczne, chętnie współpracuje z zespołem i dzieli się wiedzą, jest otwarta na naukę nowych technologii. Jeśli lubisz tworzyć nowoczesne rozwiązania backendowe i pracować z technologiami chmurowymi, chętnie Cię poznamy!

🏢 Summary: Python Developer role focused on building backend systems and AI/LLM integrations, starting with an open-source AI Red Teaming platform. The position involves developing a modular Python backend with integrations to major AI providers, real-time streaming, evaluation engines, analytics, and AWS deployment. Work includes commercial and open-source projects for international clients. 🗂️ Requirements: 3+ years commercial experience in Python backend development, Experience with Django, FastAPI, or Flask, Experience integrating AI/LLM APIs (e.g. OpenAI, Anthropic), Strong knowledge of PostgreSQL, Experience designing REST APIs, Experience with asynchronous programming in Python, Experience with Docker, Experience with CI/CD pipelines, Experience writing automated tests, Good command of English, Degree in Computer Science or related field 📃 Skills: Python, Django, FastAPI, Flask, PostgreSQL, REST, AsyncIO, Docker, CI/CD, OpenAI, Anthropic, Gemini, AWS, EKS, S3, RDS, WebSockets, SSE, LiteLLM 🏢 Description: We're looking for a Python Developer to join our team and work across a range of commercial and open-source projects focused on Python backend development and AI/LLM solutions. You'll build backends, design integrations with AI model providers, and contribute to products used by international clients. Project description: Your first project will be developing a Python-based backend for an open-source AI Red Teaming platform - a tool that enables organizations to systematically test and evaluate AI/LLM models for safety, fairness, and reliability. The project involves building a modular backend with integrations to major AI model providers (OpenAI, Anthropic, Google Gemini, AWS Bedrock, and others), real-time streaming, evaluation engine, analytics, and deployment on AWS. The platform will be released as an open-source product with a separate managed instance for the client. Requirements: - 3+ years of commercial experience in Python backend development - Experience with at least one modern Python web framework (Django, FastAPI, or Flask) - Practical experience integrating AI/LLM APIs into applications (e.g. OpenAI, Anthropic, or similar providers) - Solid knowledge of PostgreSQL and REST API design - Familiarity with async programming in Python - Experience with Docker and CI/CD pipelines - Experience writing automated tests - Good command of English (daily communication with an international client) - Degree in computer science or a related field Nice to have: - Experience with FastAPI - Experience with LiteLLM or similar LLM abstraction/routing libraries - Experience with real-time streaming (SSE, WebSockets) - Experience with AWS services (EKS, S3, RDS) - Familiarity with React or frontend technologies - Experience with open-source projects What We Offer - Fully remote work within a small, supportive team - Real responsibility from the start - no months of onboarding before you contribute - Variety - multiple projects mean diverse problems and technologies - Opportunities for professional growth, including contributions to open-source projects - A team culture built on transparency, trust, and fast feedback We look forward to hearing from you!

🏢 Summary: Remote Backend Python Developer role for a long-term pharmaceutical project focused on building secure, scalable, and high-quality backend services and REST APIs in a regulated environment. The position emphasizes clean, testable code, robust API design, and close collaboration with DevOps to ensure performance and reliability. Strong experience with modern Python ecosystem and cloud infrastructure is required. 🗂️ Requirements: Strong experience with Python 3.12+, Experience designing and implementing REST APIs, Hands-on experience with FastAPI and Pydantic, Practical knowledge of JWT authentication mechanisms, Experience with asynchronous programming, Ability to write typed Python code using typing, Experience with SQLAlchemy 2.0, Ability to write efficient SQL queries, Experience creating and maintaining unit tests, Knowledge of Dependency Injection principles, Experience with OpenAPI/Swagger documentation, Basic experience with Docker image creation, Ability to read and modify GitLab CI/CD pipelines, Practical experience with AWS services (EKS, ECR, Load Balancing) 📃 Skills: Python, FastAPI, Pydantic, SQLAlchemy, SQL, JWT, REST, OpenAPI, Swagger, Docker, GitLab, AWS, EKS, ECR, LoadBalancing, asyncio, typing, DependencyInjection, Decorators, ContextManagers, UnitTesting 🏢 Description: Backend Python Developer We are looking for an experienced Backend Python Developer to join a long‑term project for the pharmaceutical industry . The project focuses on building reliable, secure, and scalable backend services that support critical business and data-driven processes in a regulated environment. High code quality, testability, and well-designed APIs are key success factors. Work mode: 100% remote Tasks Designing and implementing backend services with a strong focus on API quality and reliability Creating well-structured, self-documented REST APIs Writing clean, maintainable, and testable Python code Collaborating closely with other engineers and DevOps teams Ensuring performance, security, and scalability of implemented solutions Requirements Solid understanding of best practices for API endpoint design and error handling Practical knowledge of JWT tokens and authentication mechanisms Strong experience with Python 3.12 or newer Writing correctly typed code using Python typing Practical experience with asynchronous programming Knowledge of decorators and context managers Habit of writing unit tests alongside production code Hands-on experience with FastAPI and Pydantic Good understanding of Dependency Injection Ability to design correct and robust models (validation, sanitization) Experience with self-documenting APIs using OpenAPI/Swagger Practical experience with SQLAlchemy 2.0 Ability to write clear and reasonably efficient database queries Basic understanding of Docker image creation principles Ability to read and modify GitLab CI/CD pipelines Practical experience navigating AWS services , especially: EKS, ECR, Load balancing Fluent English We offer Ongoing support from a dedicated agent , taking care of your project continuity, client contact, necessary formalities, work comfort and development, Consultant Development Program – advice on growth planning based on the latest trends and market needs in IT, including consultations with agents and growth mentors, Access to 7N Learning & Development – a development and educational platform with webinars, a library of articles and industry reports, and regular invitations to one-time and recurring development events – technical, business, and lifestyle, Spectacular integration events , both for you (e.g., annual Kick-Off trip , Christmas parties, or Summer Olympics sports events) and for your loved ones (e.g., family picnics, movie premieres), Professional development not only during the project – you can get involved in knowledge transfer to others within the 7N Services offering directed at 7N clients, Relationships and access to the knowledge of the most experienced IT experts in the market – the average professional tenure of our consultants in Poland is over 10 years, A complete benefits package , including funding for medical care, life insurance, sports cards for you and your loved ones, as well as discounts in stores in Poland and abroad. About 7N Constantly searching for projects, difficult rate negotiations, lack of development support – sounds familiar? At 7N, you gain not only stability of contracts but also the personal involvement of a dedicated agent who ensures your professional comfort and continuous access to development initiatives. Our mission is to provide stable and rewarding collaborations that drive your success as an IT expert and the success of our clients. We build long-lasting relationships based on Scandinavian values and 30 years of experience creating IT solutions for over 200 organizations.