Regular Python Developer

🏢 Summary: Backend Python Developer role focused on designing and implementing scalable web applications, building REST APIs, and shaping project architecture in AWS-based environments. The position involves working with modern Python frameworks, event-driven systems, and integrating backend services with React or Angular frontends. Strong emphasis on clean architecture, async programming, testing, and secure, high-quality code delivery. 🗂️ Requirements: Extensive commercial experience with Python 3.10+ in web applications, Proficiency in at least one Python framework (Django, Flask, FastAPI), Practical experience with Domain-Driven Design and Clean Architecture, Strong async Python skills (asyncio, async/await, async testing), Writing fully type-hinted Python code, Production experience with MongoDB including schema design and aggregation pipelines, Experience with relational and non-relational databases, Ability to build secure and efficient REST APIs, Experience with event-driven architecture and Kafka or similar, Experience with integration testing against real infrastructure, Proficiency with Docker and docker-compose, Familiarity with AWS services (EC2, ECS, SQS, S3, Lambda), Experience with CI/CD tools, Practical knowledge of Celery and message brokers (Redis or RabbitMQ), Knowledge of application security practices (OWASP, SAST, Semgrep), Fluent English 📃 Skills: Python, Django, Flask, FastAPI, AWS, EC2, ECS, SQS, S3, Lambda, MongoDB, SQL, NoSQL, Kafka, asyncio, Docker, CI/CD, Celery, Redis, RabbitMQ, REST, OWASP, SAST, Semgrep 🏢 Description: Exciting projects. Great atmosphere. Personal growth. Merixstudio. What you'll do: You'll join our experienced Python Developers and work on designing and implementing backend business logic and exposing it through REST API using Python 3, AWS. You’ll be responsible for the overall project structure/architecture, new features, and integration with front-end frameworks like React or Angular. Who you are (requirements): you have extensive commercial experience in development of web applications using Python (3.10+) you are proficient in more than one Python framework (Django, Flask, FastAPI etc.) you have practical experience applying Domain-Driven Design and Clean Architecture in production you have strong async Python skills: asyncio, async/await, and async testing patterns you write fully type-hinted Python as a matter of habit you have production experience with MongoDB, including schema design and aggregation pipelines you know how to effectively use relational and non-relational databases you are able to build modern, secure and efficient APIs you have experience with event-driven architectures and Kafka (or comparable streaming platforms) you have a disciplined testing practice, including integration tests against real infrastructure you are using design patterns and principles of delivering high quality, maintainable and testable code you work agentically with AI coding assistants (Claude Code, Cursor, or similar) you are proficient in using Docker and docker-compose you are familiar with AWS services (EC2, ECS, SQS, S3, Lambda) you have experience with CI/CD tools you have practical knowledge of using Celery and message brokers (Redis, RabbitMQ) you are fluent in both spoken and written English you know security issues and know how to ensure application security (OWASP, SAST, Semgrep) What we'd like to see: familiarity with TDD / DDD approach experience with WebSocket-based real-time systems mentoring skills and experience in onboarding junior/mid developers experience in leading the project as a lead developer very good communication skills and proactive attitude in architectural discussions 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: 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: Senior Back-End Developer role focused on designing and building scalable, secure APIs and services for a SaaS legal-tech platform hosted on AWS. The position involves developing distributed systems, optimizing data models, and integrating multiple AWS services to support complex enterprise workflows. You will collaborate with cross-functional teams to improve performance, reliability, and architecture of the back-end systems. 🗂️ Requirements: Experience as Back-End or Full-Stack Developer in SaaS environment, Strong knowledge of Python 3.10+, Strong knowledge of Django 4.x and Django REST Framework, Experience with PostgreSQL, Experience with Redis and/or Elasticsearch/OpenSearch, Experience with Celery and asynchronous task processing, Familiarity with AWS services: ECS, Lambda, S3, RDS, SQS/SNS, Experience with Git and CI/CD pipelines, Experience working in Agile/Scrum environment, Strong debugging and performance optimization skills 📃 Skills: Python, Django, DjangoRESTFramework, PostgreSQL, Redis, Elasticsearch, OpenSearch, Celery, AWS, ECS, Lambda, S3, RDS, SQS, SNS, Git, CI/CD, Terraform, Terragrunt, pytest, Ruff 🏢 Description: About Us We build B2B legal technology that helps law firms and fund managers work faster and produce high-quality results. Our product helps manage the legal processes used when raising private investment funds. It makes drafting, negotiation, and compliance work easier and faster for lawyers. We use a single-tenant SaaS system hosted on AWS in several regions. Our technology stack includes Python/Django 4.2, React 18 with TypeScript, PostgreSQL, Redis, Elasticsearch/OpenSearch, S3, ECS, and Lambda. Role Overview We are looking for a Senior Back-End Developer to design, build, and improve the APIs, data models, and services behind our product. You will work closely with front-end developers, QA engineers, and DevOps specialists to create reliable, scalable, and secure back-end systems used by global business clients. The ideal candidate has strong experience with Python/Django, AWS services, and distributed systems. They care about performance, clean architecture, and maintainable code. Key Responsibilities Design and build RESTful APIs using Python 3.10+ and Django 4.x / Django REST Framework. Create scalable data models and efficient queries using PostgreSQL, Redis, and Elasticsearch/OpenSearch. Build background jobs and asynchronous tasks using Celery, SQS, and Lambda. Integrate AWS services such as S3, SNS/SQS, CloudFront, ECS, and RDS into application workflows. Take part in code reviews and maintain clean, secure, and well-documented services. Work with DevOps to improve CI/CD pipelines and infrastructure automation. Help plan system architecture, scalability, and performance improvements. Essential Requirements Experience working as a Back-End or Full-Stack Developer in a SaaS environment. Strong knowledge of Python 3.10+ and Django 4.x / Django REST Framework. Experience with PostgreSQL, Redis, and/or Elasticsearch/OpenSearch. Familiarity with Celery, SQS/SNS, and AWS services such as ECS, Lambda, S3, and RDS. Experience with Git, CI/CD processes, and Agile/Scrum development. Strong debugging and problem-solving skills with attention to performance and reliability. Preferred Requirements Experience with infrastructure-as-code tools such as Terraform or Terragrunt and AWS developer tools. Knowledge of authentication systems, role-based access control, and single-tenant architecture. Experience working with text or document processing libraries. Familiarity with testing and code quality tools such as pytest, Ruff, and pre-commit workflows. Personal Attributes Practical engineer who values reliability and clean system design. Analytical and detail-focused problem solver. Comfortable working and communicating in cross-functional Agile teams. Proactive in improving code quality and developer experience. What We Offer Competitive salary and benefits. Remote-first work culture with colleagues from different countries. Opportunity to shape the back-end architecture and services of our global legal-tech product. Experience working with complex enterprise workflows and automation challenges.

🏢 Summary: Full-time B2B contract for a Software Architect (Backend & APIs) to design and build a greenfield, scalable analytics and research platform in the financial sector. The role focuses on defining cloud-native backend architecture, APIs, and integration standards to support secure content management and distribution at scale. The project runs from July 2026 to February 2027 and targets institutional clients with future retail expansion. 🗂️ Requirements: 8+ years of professional software engineering experience, Strong experience designing backend architectures and APIs, Hands-on experience with production-grade backend systems, Experience with scalable distributed and cloud-native systems, Ability to define API contracts, versioning, and integration standards, Experience with authentication and authorization mechanisms, Experience leading architectural decisions and technical discussions, Experience across full software development lifecycle, Fluent English (C1 minimum) 📃 Skills: Java, Spring, REST, OpenAPI, PostgreSQL, Docker, Kubernetes, GKE, GCP, APIGateway, ServiceMesh, OIDC, SSO, JWT, Observability, Monitoring, Microservices, DDD, EventDriven, CloudNative, DistributedSystems, AI, LLM 🏢 Description: 📍 Remote 🕒 Full-time 📄 B2B 📅 Project duration: July 2026 – February 2027 About the project We are looking for an experienced Software Architect (Backend & APIs) to join an ambitious greenfield initiative in the financial sector. The project focuses on designing and building from scratch a modern, scalable analytics and research platform that will support the complete lifecycle of premium financial content - from creation and management to publication, distribution, and consumption analytics. The platform will initially serve institutional clients, with a planned expansion toward retail users in later phases. This is a high-impact role for someone who enjoys solving complex architectural challenges, designing systems for scale, and shaping technical direction from the ground up. You will help create a platform that: streamlines and automates financial research workflows structures and manages large volumes of analytical content enables secure and scalable content distribution provides advanced insight into user engagement and content consumption supports future scalability across multiple client segments Your responsibilities Design and evolve scalable backend and API architectures for cloud-native and hybrid environments Define system architecture with strong focus on scalability, maintainability, resilience, and security Design public and internal APIs, including versioning strategy, contracts, backward compatibility, and integration standards Collaborate with sales and delivery teams during technical discovery, estimation, and solution planning Work closely with engineering teams to solve complex backend challenges and improve technical standards Drive architectural decisions and clearly communicate technical trade-offs Collaborate directly with clients and domain experts to clarify requirements and translate business needs into technical solutions Create and maintain architecture documentation, technical proposals, and design decisions Support engineering excellence through improvements in tooling, development practices, and platform standards Explore and apply AI-powered engineering tools to enhance productivity and system capabilities Tech environment You will work with modern backend and cloud technologies, including: Java 21, Spring Boot REST APIs / OpenAPI PostgreSQL Docker, Kubernetes, GKE Google Cloud Platform API Gateway / service mesh solutions Event-driven integrations Authentication & authorization standards (OIDC / SSO / JWT) Observability and monitoring tooling We value strong understanding of modern architectural approaches such as modular systems, domain-oriented design, contract-first APIs, event-driven patterns, and cloud-native distributed systems. Must have 8+ years of professional software engineering experience Strong hands-on experience designing backend architectures and APIs Proven ability to lead architectural discussions and make pragmatic technical decisions Practical experience building and reviewing real production-grade backend systems Strong experience working directly with clients and external stakeholders Excellent communication skills and ability to explain complex technical concepts clearly Experience with scalable distributed systems and cloud-native architectures Transparent, proactive, and solution-oriented mindset Experience across the full software lifecycle - from prototyping to strategic architectural direction Strong command of written and spoken English ( C1 minimum ) Nice to have Experience in the financial sector or highly regulated environments Experience with event-driven architectures and asynchronous integrations Knowledge of modern identity and access management solutions Familiarity with AI-powered development tools, LLM-based workflows, or AI-assisted engineering practices We value your trust in providing us your data, thus we are striving to use commercially acceptable means of protecting it. Below you will find the necessary information about the data we collect and process when you send us your CV. The controller of your personal data is Miquido Spółka z ograniczoną odpowiedzialnością sp. k. with its seat in Krakow, Zabłocie 43a, 30-701 Kraków, Poland (“Miquido”, “We”, “Our” or “Us”).

🏢 Summary: Senior QA Specialist role focused on manual and automated testing of web and mobile applications, including E2E and API automation. The position involves close collaboration with cross-functional teams, creating test documentation, and leveraging AI tools to enhance test planning and automation processes. Work is conducted in an Agile environment with strong emphasis on quality and modern testing practices. 🗂️ Requirements: Excellent knowledge of test levels, types, and techniques, Commercial experience with bug tracking tools (Jira), Strong knowledge of HTML, CSS, JavaScript, TypeScript, Strong experience in writing test plans and test cases, Experience with E2E and API testing best practices and tools, Experience with Cypress or Playwright for automation, Experience with Postman for API testing, Familiarity with Agile methodologies, Familiarity with Git (GitHub or GitLab), Proven experience using AI tools to create test documentation and automation scripts, Fluent written and spoken English 📃 Skills: JavaScript, TypeScript, Cypress, Playwright, Postman, Jira, Git, GitHub, GitLab, HTML, CSS, ChatGPT, Claude, Copilot 🏢 Description: Merixstudio is a full-stack, agile software team of creative technologists from Poznań. With our primary services being web&mobile app development, product design, and software development consulting, our focus is on helping our clients turn ideas into a business. And as Top Software Design & Development Company on Clutch, we have plenty of great reviews to prove that’s were good at it! Fueled by a passion for people and the newest technologies, we work in a culture based on values, cooperation, and team spirit. Put simply, we are nice people to work with - check out our profile and #MeetMerix! What you'll do: As a Senior QA Specialist, You’ll be identifying, tasking, and tracking bugs in web and mobile apps. Reviewing the requirements and specifications will also be a part of your job. You'll work in close cooperation with customers, developers, and product managers to identify system requirements. Writing scenarios, test plans, and test cases will be your responsibility. You'll be creating E2E and API automation scripts in JavaScript and TypeScript, using such open source tools as Cypress.io or Playwright. Working in an Agile environment, you'll be using tools like Postman for exploratory API testing. You will also leverage AI-powered tools and LLMs to accelerate the creation of test documentation, generate complex test data, and optimize automation script development. The recruitment process consists of two steps: a 30–45 min intro call with HR a technical interview (around 1h) Who you are (requirements): excellent knowledge of tests' levels, types and techniques commercial experience working with bug trackers (Jira) good knowledge of web browser technologies like HTML, CSS, and JavaScript/TypeScript strong experience in writing test plans and/or test cases familiarity with Agile methodologies good knowledge of E2E/API testing best practices and frameworks/tools familiarity with usability testing familiarity with Git (e.g. Github, GitLab) proven experience in leveraging AI tools (e.g., ChatGPT, Claude, GitHub Copilot) to accelerate the creation of test plans, test cases, and automated scripts excellent written and verbal communication skills in English What we'd like to see (nice-to-haves): familiarity with performance, mobile, usability and/or security testing issues experience in working with CI/CD your experience in writing BDD scenarios and adding JavaScript code to them ISTQB Foundation Level, ISTQB Agile Tester, extension certificates if you had a chance to work in projects developed in technologies similar to ours and you had a chance to present your work in front of a client is a nice set Benefits: 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 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)

🏢 Summary: Remote Senior Python Developer role focused on building and scaling a high-performance backend platform for real-time coordination of thousands of autonomous units. The position involves designing scalable services, processing high-volume telemetry data, and co-creating high-availability system architecture. The role emphasizes performance, reliability, and real impact on mission-critical distributed systems. 🗂️ Requirements: 5+ years of experience as a Python Developer, Strong knowledge of Python and backend service development, Experience with Flask or FastAPI or aiohttp, Hands-on experience with real-time data processing systems, Experience with message queues (e.g. RabbitMQ or ZeroMQ), Experience with PostgreSQL or MySQL or MariaDB, Ability to design high-availability systems handling high volumes of requests and events, Very good command of English (C1) 📃 Skills: Python, Flask, FastAPI, aiohttp, RabbitMQ, ZeroMQ, PostgreSQL, MySQL, MariaDB, APIs, Telemetry, Asyncio 🏢 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)

🏢 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: Backend Developer role focused on designing and building scalable, secure microservices and APIs using Java and Spring Boot in a cloud-oriented environment. The position emphasizes strong data modeling, architecture design, and CI/CD-driven delivery within Agile teams. The contractor will develop resilient backend solutions and ensure high code quality and reliability. 🗂️ Requirements: Hands-on experience with API and Microservices development in Java or Spring Boot, Proficiency in Java/J2EE application development, Experience with Spring Framework and Hibernate JPA, Experience building and consuming REST web services, Experience working with XML and JSON, Experience with relational or NoSQL databases (Oracle, PostgreSQL, MongoDB), Experience with CI/CD pipelines and Jenkins, Experience with Docker and Git, Unix proficiency, Experience working in Agile methodologies (Scrum or Kanban) 📃 Skills: Java, Spring, SpringBoot, J2EE, Hibernate, JPA, REST, XML, JSON, Oracle, PostgreSQL, MongoDB, Jenkins, Docker, Git, Unix, CICD, Microservices, Agile, Scrum, Kanban 🏢 Description: Location : Cracow Mode : Hybrid (6 days per month at the office - flexible) Contract : B2B Rate : 160-170 PLN/h Introduction & Summary We are seeking a skilled Backend Developer who possesses a deep knowledge of data modeling and architecture. The ideal candidate should have extensive experience in API development using core Java and Spring Boot, with a strong grasp of security principles and Agile methodologies. The role requires an analytical mindset, capable of designing resilient and scalable solutions while working cross-functionally to foster collaboration and innovation. Main Responsibilities Ensure proper definition and architecture of non-functional requirements in design. Develop and grow skills in designing cloud-based, secure, and adaptable solutions. Build scalable, highly reliable product features through effective software design and implementation. Apply problem-solving and analytical skills to diverse challenges. Interact with cross-functional teams for scalable solution production. Estimate engineering efforts and develop realistic schedules. Identify and resolve complex production issues efficiently. Conduct comprehensive design and code reviews and perform unit testing. Utilize source control and bug tracking systems responsibly. Key Requirements Hands-on experience in API and Microservices development using core Java and/or Spring Boot . Proficient in application development using Java/J2EE and related technologies, including Spring Framework and Hibernate JPA. Experience in developing reusable APIs and consuming web services (REST), as well as processing data formats like XML/JSON. Expert knowledge of Agile/Scrum/Kanban development methodologies and experience with databases (Oracle, Postgre, MongoDB). Extensive knowledge of CI/CD deployment pipelines, including Jenkins, Docker, shell scripting, and GIT with Unix proficiency. Nice to Have Experience in JavaScript frameworks such as ReactJs, Node JS, Angular, and jQuery. Familiarity with JavaScript build tools and dependency management. Experience in creating responsive designs using frameworks like Bootstrap. Knowledge of GCP, GKE, AWS is an advantage. Experience or knowledge in system architecture and solution design. Hands-on experience in Python, Machine Learning, and Data Science.

🏢 Summary: Senior/Mid+ Java Developer role focused on transforming a high-scale credit decisioning platform from monolith to microservices, building mission-critical applications and event-driven systems. The position involves designing scalable Java solutions within the Spring and Hibernate ecosystem, managing complex SQL data flows, and developing high-performance APIs. The role also includes working in a CI/CD-driven Scrum environment with international collaboration. 🗂️ Requirements: Strong experience with Java 8/17/21, Experience with Spring and Hibernate in large-scale applications, Strong knowledge of SQL, Experience building RESTful APIs, Experience with Git, Maven, and TeamCity, Familiarity with microservices architecture, Familiarity with Apache Kafka, Experience working in Scrum environment, English and Polish proficiency 📃 Skills: Java, Spring, Hibernate, SQL, REST, Git, Maven, TeamCity, Kafka, Microservices, CI/CD, Scrum 🏢 Description: Join our engineering team to drive the transformation of high-scale credit decisioning platforms. We are looking for an owner-minded developer ready to evolve our systems from monolith to microservices. Your Impact: Modernizing Architecture: Transition core processes from monolithic structures to modular microservices to enhance scalability and domain ownership. High-Scale Java Dev: Design mission-critical apps using Java 8/17/21 within a robust Spring & Hibernate ecosystem. Data & API Engineering: Manage complex SQL-based data flows and build high-performance APIs to connect internal and external global partners. Event-Driven Systems: Leverage Apache Kafka to build resilient, asynchronous communication between distributed services. Engineering Excellence: Maintain CI/CD standards using Git, Maven, and TeamCity within an international Scrum environment. Global Collaboration: Communicate technical concepts clearly in Polish and English to ensure smooth delivery across markets. What You Bring: Expertise: Solid experience in Java 8/17/21 and large-scale Spring + Hibernate applications. Technical Core: Strong command of SQL, RESTful APIs, and Git/Maven/TeamCity environments. Architectural Mindset: Familiarity with microservices and Apache Kafka (or a strong desire to learn). Seniority: You are a Senior or an ambitious Mid+ developer with a proactive, growth-oriented attitude.