Python Developer (FastAPI)

🏢 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: Senior Python Developer role focused on building and maintaining high-performance backend services and REST APIs using Python and FastAPI in a fully remote environment. The position involves designing scalable solutions, integrating with internal and third-party systems, and contributing to architectural decisions and CI/CD improvements. You will work on core product services with strong ownership and emphasis on clean, testable code. 🗂️ Requirements: 5+ years commercial experience with Python, Strong production experience with FastAPI, Experience designing and building REST APIs, Knowledge of async programming, Understanding of authentication and data validation, Experience with SQL databases (PostgreSQL or MySQL), Experience with at least one NoSQL database (Redis or MongoDB), Experience with Docker, Experience with Git, Experience with CI/CD pipelines, Experience writing tests with pytest 📃 Skills: Python, FastAPI, REST, SQL, PostgreSQL, MySQL, Redis, MongoDB, Docker, Git, CI/CD, pytest, Async 🏢 Description: About us We are a fast-growing iGaming company building modern, scalable products for international markets. We work in a fully remote, international setup and value clean code, ownership and pragmatic engineering over buzzwords. About the role We are looking for a Senior Python Developer with strong FastAPI experience to join our backend team. You will be designing and developing high-performance services that power our core products, working closely with product, design and other engineers. What you'll do - design, build and maintain backend services and REST APIs using Python and FastAPI - integrate with internal and third-party systems - write clean, testable, well-documented code - participate in code reviews, technical discussions and architectural decisions - contribute to improving our development practices, CI/CD and code quality What we expect - 5+ years of commercial experience with Python - strong, hands-on experience with FastAPI in production - solid background in web development (REST API design, async, auth, data validation) - good command of SQL databases (PostgreSQL/MySQL) and at least one NoSQL store (Redis, MongoDB) - experience with Docker, Git and CI/CD pipelines - comfortable writing tests (pytest) - English at B2+ level Nice to have - experience in iGaming, fintech or other high-load industries - message queues (RabbitMQ, Kafka, Celery) - cloud platforms (AWS/GCP) - Pydantic, SQLAlchemy, Alembic - microservices and event-driven architecture What we offer - B2B contract, fully remote - competitive salary in EUR - international, English-speaking team - modern tech stack and real ownership of what you build - flexible working hours

🏢 Summary: Offer for a Backend Python Developer to build and maintain high-performance backend systems for a Polish client. The role focuses on developing scalable services and designing architecture using modern Python frameworks such as Django or FastAPI. Responsibilities include backend development, architecture design, and performance optimization. 🗂️ Requirements: Minimum 3 years of commercial experience in Python, Very good knowledge of Django or FastAPI, Experience with relational databases, Ability to design backend architecture, Experience in building and maintaining backend services 📃 Skills: Python, Django, FastAPI, SQL 🏢 Description: Dołącz do zespołu rozwijającego wydajne systemy backendowe dla polskiego klienta. Stawiamy na czysty kod i nowoczesne frameworki Pythonowe. Zakres obowiązków: Rozwój i utrzymanie usług backendowych w Pythonie. Projektowanie architektury opartej o Django lub FastAPI. Optymalizacja i dbanie o skalowalność rozwiązań. Wymagania: Minimum 3 lata doświadczenia komercyjnego w Pythonie. Bardzo dobra znajomość frameworka Django lub FastAPI . Umiejętność pracy z relacyjnymi bazami danych. Praca zdalna z okazjonalnymi wizytami w Warszawie .

🏢 Summary: Senior Python Backend Developer role focused on building scalable, cloud-native backend services using Python and FastAPI in GCP environments. The position involves designing containerized microservices, contributing to CI/CD pipelines, and ensuring high performance, security, and reliability of production systems. It offers fully remote work within Europe on modern cloud and container-based architectures. 🗂️ Requirements: Minimum 4 years of backend development experience with Python, Strong knowledge of GCP and cloud service architectures, Experience with containers and orchestration tools, Experience with FastAPI or similar Python frameworks, Solid understanding of microservices architecture, Experience designing and implementing RESTful APIs, Experience with CI/CD pipelines, Proficient English (spoken and written), Legal right to work in Europe 📃 Skills: Python, FastAPI, GCP, Docker, Kubernetes, Microservices, REST, CI/CD, Cloud, Containers 🏢 Description: Warszawa-based opportunity with remote work model, allowing up to 5 days per week from anywhere in Europe. As a Senior Python Backend Developer – Cloud & Container Experts , you will be working for our client, a leader in cloud computing and containerization technologies. Join a dynamic team dedicated to building scalable, resilient, and cutting-edge backend systems that power modern applications. This role offers a pathway to work on impactful projects at the forefront of digital transformation. Your main responsibilities: Design, develop, and optimize scalable backend services using Python and FastAPI within cloud environments. Implement containerized solutions leveraging Google Cloud Platform (GCP) and modern orchestration tools. Collaborate with cross-functional teams to deliver high-performance software solutions. Ensure code quality, performance, and security standards are maintained. Participate in continuous integration and deployment pipelines to streamline releases. Contribute to system architecture planning and best practices in cloud-native development. Troubleshoot and resolve production issues swiftly and efficiently. You're ideal for this role if you have: At least 4 years of experience in backend development with Python. Strong knowledge of GCP, containers, and cloud service architectures. Experience with FastAPI or similar frameworks. Previous full-stack experience is a plus; familiarity with React is advantageous. Solid understanding of microservices and RESTful API design. Ability to work independently in a remote environment and communicate effectively within international teams. It is a strong plus if you have: (optional) Additional certifications in cloud technologies or container orchestration. Experience with DevOps tools and CI/CD pipelines. Language Required for the role: Proficient command of English (spoken and written). Eligibility for the role: Only candidates with an existing legal right to work in Europe will be considered for this role.

🏢 Summary: Long-term remote B2B opportunity for an experienced Full Stack Developer to build secure, scalable backend services and full-stack features using Python and FastAPI. The role involves designing REST APIs, implementing authentication mechanisms, and working with containerized, cloud-based environments. The project focuses on secure development practices and high-performance distributed systems. 🗂️ Requirements: Minimum 4 years of experience in full stack or backend development, Strong experience with Python and FastAPI, Experience designing and developing REST APIs, Experience with PostgreSQL, Knowledge of OAuth2, OIDC, RBAC, SSO, Hands-on experience with Docker and Kubernetes, Experience with CI/CD pipelines, Understanding of secure software development practices, Ability to work in cloud or hybrid environments, EU citizenship and residence in Poland 📃 Skills: Python, FastAPI, REST, PostgreSQL, OAuth2, OIDC, RBAC, SSO, Docker, Kubernetes, CI/CD, React, TypeScript, Next.js 🏢 Description: In Cyclad we work with top international IT companies in order to boost their potential in delivering outstanding, cutting-edge technologies that shape the world of the future. We are currently looking for an experienced Full Stack Developer (Python / FastAPI) to join a remote team working on secure and scalable backend services and full-stack feature development Project information: Type of project: IT services Office location: Poland Work mode: Remote Budget: 130-150 PLN net/ h- b2b Project length: Long-term Only candidates with citizenship in the European Union and residence in Poland Start date: ASAP (depending on candidate’s availability) Project scope: Design and develop full-stack features (frontend + backend) Build backend services using Python (FastAPI) and REST APIs Develop scalable data models and secure services Implement authentication and authorization (OAuth2, OIDC, RBAC, SSO) Work with Docker, Kubernetes and CI/CD pipelines Support secure development practices (validation, compliance, scanning) Collaborate with teams on technical requirements and system design Troubleshoot and improve system performance and stability Competence demands: Min. 4 years of experience in similar roles Strong experience with Python (FastAPI) and REST APIs Experience with PostgreSQL Knowledge of authentication/security frameworks (OAuth2, OIDC, RBAC, SSO) Hands-on experience with Docker, Kubernetes and CI/CD tools Understanding of secure software development practices Ability to work in cloud or hybrid environments Min. 4 years of experience in similar roles Nice to have: React, TypeScript, Next.js We offer: Remote working model Full-time job agreement based on b2b Private medical care with dental care (covering 70% of costs) Multisport card (also for an accompanying person) Life insurance

🏢 Summary: Senior Python Developer role focused on building high-performance backend services for real-time, event-driven systems. The position involves extensive asynchronous programming, data streaming, and designing scalable architectures for high-load environments. 100% remote work with strong impact on architectural decisions and system reliability. 🗂️ Requirements: Minimum 8 years of experience in Python development, Strong expertise in asynchronous programming with asyncio, Deep understanding of GIL, multithreading and multiprocessing, Experience with real-time or high-load systems, Hands-on experience with RabbitMQ and Kafka, Experience with FastAPI, Flask or aiohttp, Knowledge of PostgreSQL or MySQL, Experience designing event-driven architectures, Experience building and maintaining high-performance APIs 📃 Skills: Python, asyncio, GIL, multithreading, multiprocessing, RabbitMQ, Kafka, FastAPI, Flask, aiohttp, PostgreSQL, MySQL, APIs, concurrency, streaming, event-driven 🏢 Description: Our Client is a fast-growing international technology company developing advanced distributed systems for real-time data processing. The project focuses on building a high-performance backend platform that handles large volumes of events, communicates asynchronously, and requires well-thought-out architectural decisions. Key aspects of the role include asynchronous programming in Python, event-driven architectures, and data streaming, where performance and reliability have a direct impact on the overall system. 📍 WORK MODE 100% remote (optional visits to the office in Warsaw ) 🧑‍💻 RESPONSIBILITIES Development of backend services in Python for real-time systems Processing telemetry data and events in an event-driven architecture Extensive work with asynchrony (asyncio) and concurrency Designing and developing APIs (FastAPI / Flask / aiohttp) Working with message brokers and data streaming platforms Contributing to the design of high-load system architectures Code reviews and ensuring high quality and reliability of systems 🔍 REQUIREMENTS Must-have: Minimum 8 years of experience as a Python Developer Strong expertise in asynchronous programming in Python (asyncio) – essential Solid understanding of the GIL, multithreading vs. multiprocessing Experience with real-time and/or high-load systems Hands-on experience with RabbitMQ and Kafka (queues and streaming) Experience with FastAPI / Flask / aiohttp Knowledge of relational databases (PostgreSQL / MySQL) Very good command of English (C1 level) 🤝 WHY JOIN? A project where asynchrony and real-time processing are the core foundation Real impact on system architecture and technical decisions Work on high-load systems and data streaming solutions 100% remote work with a flexible approach to work organization Paid time off and stable cooperation conditions Work in 2-week sprints, Jira, clear goals, and fast feedback Please note that only selected candidates will be contacted as part of the recruitment process. The recruitment process is conducted by TQLO Sp. z o.o. , a licensed recruitment agency registered in Poland under KRAZ number: 33580 .

🏢 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.

🏢 Summary: Senior Python Backend Developer role focused on building scalable, cloud-native backend systems using Python and FastAPI within GCP environments. The position involves designing containerized microservices, contributing to system architecture, and supporting CI/CD processes in a modern cloud ecosystem. Fully remote within Europe with collaboration on high-impact digital transformation projects. 🗂️ Requirements: Minimum 4 years of backend development experience with Python, Strong knowledge of GCP and cloud service architectures, Experience with FastAPI or similar Python frameworks, Experience with containerized environments, Solid understanding of microservices architecture, Experience designing and developing REST APIs, Proficient English (spoken and written), Legal right to work in Europe 📃 Skills: Python, FastAPI, GCP, Containers, Microservices, REST, CICD, React 🏢 Description: Ignite innovation — transform cloud-native backend solutions with Python mastery! Warszawa-based opportunity with remote work model, allowing up to 5 days per week from anywhere in Europe. As a Senior Python Backend Developer – Cloud & Container Experts , you will be working for our client, a leader in cloud computing and containerization technologies. Join a dynamic team dedicated to building scalable, resilient, and cutting-edge backend systems that power modern applications. This role offers a pathway to work on impactful projects at the forefront of digital transformation. Your main responsibilities: Design, develop, and optimize scalable backend services using Python and FastAPI within cloud environments. Implement containerized solutions leveraging Google Cloud Platform (GCP) and modern orchestration tools. Collaborate with cross-functional teams to deliver high-performance software solutions. Ensure code quality, performance, and security standards are maintained. Participate in continuous integration and deployment pipelines to streamline releases. Contribute to system architecture planning and best practices in cloud-native development. Troubleshoot and resolve production issues swiftly and efficiently. You're ideal for this role if you have: At least 4 years of experience in backend development with Python. Strong knowledge of GCP, containers, and cloud service architectures. Experience with FastAPI or similar frameworks. Previous full-stack experience is a plus; familiarity with React is advantageous. Solid understanding of microservices and RESTful API design. Ability to work independently in a remote environment and communicate effectively within international teams. It is a strong plus if you have: (optional) Additional certifications in cloud technologies or container orchestration. Experience with DevOps tools and CI/CD pipelines. Language Required for the role: Proficient command of English (spoken and written). Eligibility for the role: Only candidates with an existing legal right to work in Europe will be considered for this role. #MAKEYourCareerBETTER Interested? Apply now and include your CV (preferably in English) along with a statement confirming your consent to the processing and storage of your personal data.

🏢 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: The offer is for a Senior Python Developer to design and build a scalable, high-performance backend platform supporting real-time communication and coordination of thousands of autonomous units. The role focuses on mission-critical systems, real-time telemetry processing, and high-availability architecture in a fully remote, international environment. The position involves strong influence on system architecture and technical decisions. 🗂️ Requirements: Minimum 5+ years of experience as a Python Developer, Strong knowledge of Python and backend service development, Hands-on experience with Flask or FastAPI or aiohttp, Practical experience with real-time data processing systems, Experience with message queues such as RabbitMQ or ZeroMQ, Experience with PostgreSQL or MySQL or MariaDB, Ability to design high-load, high-availability systems, Very good command of English (C1) 📃 Skills: Python, Flask, FastAPI, aiohttp, RabbitMQ, ZeroMQ, PostgreSQL, MySQL, MariaDB, APIs, Telemetry, Jira 🏢 Description: Our Client is a fast-growing technology company building advanced solutions in the field of autonomy and distributed systems, operating in a fully international environment. The project focuses on developing a scalable backend platform that supports thousands of autonomous units operating and communicating in real time. We are looking for an experienced Python Developers who want to have a real impact on the architecture of mission-critical systems and work on products where performance, reliability, and fast engineering decisions truly matter. WORK MODE: 100% remote - occasional visits to Warsaw (mokotów) WHAT WILL YOU BE WORKING ON? Designing, implementing, and developing scalable backend services in Python , handling real-time telemetry data processing (thousands of events per second) Co-designing the architecture of high-availability, high-performance systems responsible for coordination, analysis, and real-time data distribution Building and maintaining data pipelines (telemetry, sensor data, mission-critical events) using message queues and asynchronous mechanisms Designing and implementing APIs consumed by frontend applications, internal tools, and other platform components Working closely with backend, frontend, and autonomy/algorithm teams to ensure seamless system integration Participating in architectural design, code reviews, ensuring code quality, monitoring, and maintaining clear technical documentation WHAT DO WE EXPECT FROM YOU? Must-have: Minimum 5+ years of experience as a Python Developer Strong knowledge of Python and backend service development Hands-on experience with web frameworks such as Flask , FastAPI or aiohttp Practical experience with real-time data processing systems (must have) and message queues (e.g. RabbitMQ , ZeroMQ , or similar) Experience working with databases such as PostgreSQL , MySQL , or MariaDB Ability to design systems handling a high volume of requests and events per second Very good command of English (C1) Nice-to-have: Experience with Go Knowledge of distributed systems, data streaming, or event-driven architecture Background in building mission-critical systems (high availability, real-time processing) WHY IS IT WORTH IT? Permanent employment with end client with competitive compensation aligned with your experience Real influence on system architecture and product direction in a high-responsibility, large-scale project Work in an international team focused on outcomes rather than unnecessary processes 100% remote work and a flexible approach to work organization Paid time off and stable cooperation conditions 2-week sprints, Jira , clear goals, and fast feedback loops A work culture built on quality, ownership, and true partnership Thank you for all applications! We will contact selected candidates. TQLO Sp. z o.o. – Agencja Zatrudnienia (KRAZ nr 33580)