Senior Python Software Engineer

🏢 Summary: Full-time B2B contract for a Senior Python Engineer to design and operate scalable, production-grade backend systems in a cloud-native environment within the energy trading domain. The role focuses on building modern services with Python and FastAPI, developing CI/CD pipelines, and supporting data engineering solutions. The project runs until the end of 2026 with possible extension and requires close collaboration with cross-functional teams. 🗂️ Requirements: Strong Python development experience, Hands-on experience with FastAPI, Proven cloud-native engineering experience, Strong knowledge of Kubernetes, Strong knowledge of Docker, Experience with CI/CD pipelines, Experience with Azure DevOps, Data engineering experience, Strong SQL skills, Experience with Snowflake, Experience with Kafka, Experience with business-critical systems 📃 Skills: Python, FastAPI, Kubernetes, Docker, AzureDevOps, CICD, SQL, Snowflake, Kafka, CloudNative, DataEngineering 🏢 Description: 🌍 Remote work: 100% remote. ⏰ Start: 22.06.2026. ⏳ Project length: until 31.12.2026 + possible extensions. 📑 Assignment type: B2B , 160–190 PLN/h, depending on experience and project fit. 📕 Project language: English. ⚙️ Recruitment process: 2 meetings with the client. 💬 Workload: Full-time. 💼 Industry: Cloud Computing / Energy Trading. About the Role: We are looking for a Senior Python Engineer with strong experience in cloud-native platforms and, ideally, exposure to energy trading, ETRM, or risk management systems . The ideal candidate is a hands-on engineer who can work independently, collaborate effectively with architects, product managers, and business stakeholders, and design, develop, and operate scalable, production-grade solutions in a modern cloud-native environment. Main Responsibilities: Design, develop, and maintain scalable, production-grade applications in a cloud-native environment Collaborate with architects, product managers, and business stakeholders to define and refine technical solutions. Build and operate modern backend services using Python and FastAPI . Develop and maintain CI/CD pipelines and deployment processes. Design and support data engineering solutions and integrations. Ensure reliability, performance, and maintainability of business-critical systems. Contribute to architecture decisions and technical best practices. Key Requirements: Strong Python development experience. Hands-on experience with FastAPI and modern backend development. Proven cloud-native engineerin g experience. Strong knowledge of Kubernetes and Docker . Experience with CI/CD pipelines and Azure DevOps. Data engineering experience. Strong SQL skills . Experience with Snowflake and Kafka . Experience working with business-critical systems. Strong analytical and problem-solving skills. Ability to work independently while collaborating effectively with cross-functional stakeholders. Highly Preferred Experience in energy trading environments. Experience with ETRM (Energy Trading and Risk Management) platforms . Experience with risk management systems . Team & Environment Independent engineering role with close collaboration across architecture, product, and business teams Modern cloud-native environment International project with English-speaking stakeholders and teams

🏢 Summary: Senior Python Developer role in a startup-like environment focused on designing and delivering high-performance, scalable systems for demanding clients. The position involves full ownership of features from architecture to deployment, solving complex engineering problems, and shaping technical direction. It requires working under pressure with rapidly changing priorities while ensuring code quality and system reliability. 🗂️ Requirements: 5+ years commercial software development experience, Strong professional experience with Python, Excellent knowledge of Python 3.11+, Production experience with FastAPI or Falcon and Async SQLAlchemy 2.0, Strong expertise in REST and GraphQL API design, Solid understanding of relational and non-relational databases, Advanced knowledge of OOP, SOLID, YAGNI, TDD, Extensive experience with pytest, CI/CD pipelines, Docker, deployments, Experience building scalable, low-latency systems, Very good written and spoken English 📃 Skills: Python, FastAPI, Falcon, SQLAlchemy, REST, GraphQL, PostgreSQL, MongoDB, Redis, Elasticsearch, pytest, Docker, CI/CD, AWS, Azure, OOP, SOLID, TDD 🏢 Description: Startup Environment, High Ownership, Demanding Clients Join our startup-like environment filled with new ideas, rapid change, and a strong focus on priorities and delivery. We are looking for a Senior Python Developer - someone experienced, open-minded, and ready to take real ownership of both product and technical direction. You will work closely with demanding clients , solve complex engineering problems, and help shape ambitious, high-performance systems. This role is for engineers who enjoy responsibility, fast feedback loops, architectural challenges, and working under pressure . Your primary responsibilities beyond the will to change the world: Act as a technical partner for clients : analyze business needs, challenge requirements, and propose effective, scalable solutions Take full ownership of complex features - from concept and architecture through implementation, testing, and automated deployment Design system architecture, APIs, and data models for high-load, data-intensive systems Deliver core and business-critical components of projects Work in a dynamic, startup-style environment with changing priorities, tight deadlines, and real product pressure Proactively identify risks, bottlenecks, and technical debt , and drive improvements Ensure high code quality, performance, and reliability Support and mentor other developers, helping raise engineering standards across teams Must have: 5+ years of commercial software development experience, including strong professional experience in Python Excellent knowledge of Python 3.11+ (typing, dataclasses, modern best practices) Production experience with modern Python frameworks ( async FastAPI preferred, Falcon welcome, Async SQLAlchemy 2.0 ) Strong expertise in API design (REST, GraphQL) Solid understanding of databases and data-driven systems (relational, document, search, key-value stores) Advanced knowledge of software engineering principles (OOP, SOLID, YAGNI, TDD) Extensive experience with unit testing (pytest), CI/CD pipelines, Docker, and deployments Proven ability to build efficient, low-latency, scalable systems Confidence working with tight deadlines, pressure, and frequently evolving requirements Very good written and spoken English Strong communication skills and a proactive, ownership-oriented mindset Experience we'd appreciate, too: Experience in system architecture and technical leadership Asynchronous programming and high-concurrency systems Messaging systems and distributed architectures DDD and event-driven design Cloud and DevOps experience ( AWS / Azure ) Mentoring and influencing technical direction of projects Nice to have: Community involvement (meetups, open source, speaking) Writing technical articles or internal knowledge-sharing A list of benefits is long so we will mention only about the crucial ones: Challenging projects with real business impact Work in a startup-like environment : fast decisions, autonomy, responsibility 100% remote or office in Poland (Wrocław / Zielona Góra) Sport subscription Private healthcare

🏢 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: Opportunity for a Senior Python Developer to build advanced risk management platforms for global financial institutions within demanding trading environments. The role focuses on developing scalable backend systems, contributing to cloud-based architectures, and collaborating with international clients and senior engineers. It offers high technical ownership, exposure to quantitative finance, and work across multiple modern technologies. 🗂️ Requirements: Strong commercial experience in Python backend development, Degree in Computer Science, Mathematics, Physics, or related field, Solid understanding of software architecture, algorithms, and data structures, Experience with cloud platforms (AWS, Azure, or GCP), Ability to work across multiple programming languages and tech stacks, Confident English communication skills, Willingness to work in hybrid model (4 days in Warsaw office) 📃 Skills: Python, Go, Rust, C++, TypeScript, AWS, Azure, GCP, Algorithms, DataStructures, Cloud 🏢 Description: 💎 Senior Python Developer 💎 A rare opportunity has arisen for an ambitious, highly technical Senior Python Developer to join an elite engineering team building advanced risk management solutions for global financial institutions. In this role, you will work on complex backend systems used within highly demanding financial and commodities trading environments, collaborating closely with top-tier engineers and international clients. You will contribute to the development of scalable risk platforms while working across modern cloud infrastructure and multiple programming languages. If you enjoy solving difficult engineering problems, working alongside exceptionally strong developers, and building software with real business impact… Feel invited! This role offers a unique combination of technical depth, ownership, and exposure to the world of quantitative finance. WHAT WE OFFER B2B contract Competitive salary + biannual bonus Flexible working hours Hybrid work - 4 days from the office located in Warsaw Work closely with experienced engineers from top financial and technology companies International projects and collaboration with global clients Opportunity to grow within a highly technical, developer-driven culture YOUR ROLE Develop and maintain backend systems primarily in Python Build and extend risk management software for financial institutions Design scalable and maintainable solutions for complex business requirements Collaborate directly with international clients and technical stakeholders Work across multiple technologies including Python, Go, Rust, C++, and TypeScript Contribute to cloud-based solutions running on AWS and Azure Participate in architectural discussions and technical problem solving Continuously improve platform reliability, performance, and scalability IF YOU ARE A PERSON WHO Has strong commercial experience with Python backend development Holds a degree in Computer Science, Mathematics, Physics, or a related field Has solid understanding of software architecture, algorithms, and data structures Feels comfortable working across multiple programming languages and tech stacks Communicates confidently in English and enjoys working directly with clients Has experience with cloud platforms such as AWS, Azure, or GCP Understands financial systems or has previous exposure to financial markets (nice to have) Thrives in highly collaborative, engineering-driven environments Enjoys solving complex technical challenges together with the team in the office Congrats! This offer is especially for YOU!

🏢 Summary: Hands-on Senior Python Developer role focused on modernizing and refactoring legacy systems using modern Python frameworks and SQLAlchemy, with support from AI-assisted development tools. The position involves improving code quality, scalability, and reliability in a regulated environment while contributing to long-term architectural enhancements. 🗂️ Requirements: 10+ years of professional Python development experience, Proven experience modernizing and migrating legacy systems, Strong knowledge of SQLAlchemy and complex data models, Experience using AI tools for code refactoring or analysis, Understanding of code quality standards in regulated industries, Ability to design scalable and maintainable architectures, Hands-on experience working directly with legacy codebases 📃 Skills: Python, SQLAlchemy, SQL, AI, Architecture, Refactoring, Debugging 🏢 Description: We are looking for a highly experienced Senior Python Developer with a strong track record of modernizing legacy systems. This is a hands‑on engineering role for someone who excels at solving complex technical problems and improving existing codebases. Tasks Modernize and refactor legacy applications using Python, modern Python web frameworks, and SQLAlchemy. Apply AI‑assisted development tools to analyze and refactor legacy code. Improve code quality, maintainability, and system reliability in a regulated environment. Contribute to scalable architecture design and long‑term technical improvements. Drive continuous enhancement of our technology infrastructure. Work directly in the codebase—debugging, refactoring, implementing, and delivering. Expectations 10+ years of professional Python development experience. Proven experience modernizing legacy systems and migrating them to modern architectures. Strong SQLAlchemy knowledge and experience with complex data models. Practical experience using AI tools to support code refactoring or analysis. Solid understanding of code quality standards in regulated industries; Pharma compliance experience is a plus. Ability to design scalable, maintainable solutions. Hands‑on mindset—comfortable working directly with legacy code. 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.

🏢 Summary: Senior Python Engineer role focused on building and deploying enterprise-grade, AI-powered solutions in a cloud-based microservices environment for a large-scale professional services project. The position involves end-to-end development of scalable Python applications, integration of Generative AI and LLM capabilities, and technical leadership within a cross-functional team. Offered as a remote B2B contract with a competitive hourly rate. 🗂️ Requirements: 5+ years of commercial experience in software development, Strong hands-on experience with Python and FastAPI, Practical knowledge of Pydantic for schema modelling and data validation, Experience with asyncio and asynchronous/parallel programming, Experience with Generative AI and Large Language Models in real business use cases, Understanding of RAG pipelines and hybrid search with vector databases, Strong analytical and problem-solving skills, Very good organizational and self-management skills, Strong troubleshooting and communication skills, English level Intermediate+ 📃 Skills: Python, FastAPI, Pydantic, asyncio, LLM, RAG, LangChain, LangGraph, Azure, MongoDB, AzureSQL, Angular, Kendo, GitHub, Copilot, Docker, Kubernetes, .NET, ASP.NET, Microservices 🏢 Description: For our client we are looking for an experienced Senior Python Engineer to join a modern technology initiative delivered for one of the Big Four firms - the world's largest professional services network, headquartered in London and operating across more than 150 countries. The team behind this project is responsible for designing, building, and deploying enterprise-grade tools and AI-powered solutions that support tax service delivery. It is a cross-functional environment bringing together experts in software engineering, tax, project management, and change management. The scope of work includes solution design, implementation, rollout, training support, and broader stakeholder collaboration. Tech stack Azure Cloud, Microservices Architecture, .NET 8, ASP.NET Core services, Python, MongoDB, Azure SQL, Angular 18, Kendo, GitHub Enterprise with Copilot, LangGraph, LangChain, RAG Pipelines, Multi-modal LLMs Responsibilities Analyse business and technical requirements, contribute to system design, and support end-to-end Python and AI solution development Build, enhance, and maintain scalable Python applications using FastAPI and Pydantic Develop asynchronous and parallel processing solutions with asyncio Perform detailed code reviews to ensure consistency with engineering standards and maintain high code quality Integrate and test multi-modal GenAI capabilities, including areas such as text-to-image and text-to-audio Work effectively both independently and as part of a collaborative team Support day-to-day team coordination by giving clear guidance and helping organize ongoing work Stay in regular contact with the client and support smooth communication Provide technical leadership within the team by mentoring others, coaching colleagues, and setting a strong example Requirements 5+ years of commercial experience in software development Strong hands-on experience with Python and FastAPI Good practical knowledge of Pydantic for schema modelling and data validation Experience with asyncio and asynchronous / parallel programming Practical experience with Generative AI and Large Language Models, including building agentic AI solutions for real business use cases Good understanding of RAG pipelines and hybrid search with vector databases Strong analytical thinking and problem-solving skills, with close attention to detail Pragmatic mindset and the ability to balance process, structure, and flexibility in delivery Very good organizational skills, including self-management, prioritization, and effective work under deadlines Strong troubleshooting and communication skills English level: Intermediate+ Nice to have Experience with Azure Cloud services or other major cloud platforms, including SaaS tools such as Service Bus, Data Lake, Blob Storage, Redis, and similar solutions Familiarity with agentic protocols such as MCP and A2A Hands-on experience with the LangGraph ecosystem, especially long-term memory, state management, and human-in-the-loop workflows Familiarity with .NET Experience with Docker and Kubernetes Solid understanding of microservices architecture and scalable distributed systems Offer rate: 140 - 160 pln B2B remote

🏢 Summary: Senior Backend Python Engineer role focused on building scalable AI-powered enterprise software and owning backend services from architecture to production. The position involves backend development, distributed systems, cloud infrastructure, and technical leadership in a hybrid B2B environment. Candidates will collaborate across teams to deliver secure, high-performance applications using modern engineering and AI-assisted workflows. 🗂️ Requirements: 6+ years building production-grade backend systems, Strong Python experience, Experience with distributed systems, Knowledge of concurrency and asynchronous processing, Experience designing REST APIs, Experience with scalable architectures, Hands-on cloud platform experience, Database design and performance optimization knowledge, Experience building secure enterprise applications, Ability to own projects from design to deployment, Cross-functional collaboration skills, Strong troubleshooting and problem-solving skills, Excellent English communication skills, Experience with AI tooling and automation workflows 📃 Skills: Python, REST, AWS, GCP, Azure, SQL, TypeScript, LLM, AI, Monitoring, Logging, Observability, Automation 🏢 Description: Senior Backend Engineer (Python) 📍 Warsaw, Poland (Hybrid) ☑️ Full-time 🕦 B2B Contract 💰 $8.000 - $12.000/month We are hiring a Senior Backend Python Engineer for an innovative technology company building AI-powered enterprise software used by organizations worldwide. This role is ideal for an experienced backend engineer who enjoys designing scalable production systems, solving complex technical challenges, and taking ownership of critical backend services from architecture through production. You'll work closely with product, frontend, and platform engineers to build reliable, secure, and high-performance applications while leveraging modern AI-assisted engineering practices . As a Senior Backend Python Engineer you will provide backend development, system design, cloud infrastructure, and technical leadership in a fast-paced engineering environment where ownership and continuous improvement are highly valued. Requirements 6+ years of experience building and maintaining production-grade backend systems Strong hands-on experience with Python and modern backend development practices Strong understanding of distributed systems, concurrency, asynchronous processing, and scalable architectures Experience designing and developing REST APIs and backend services Hands-on experience with cloud platforms such as AWS, GCP, or Azure Strong knowledge of database design, performance optimization, and high-throughput applications Experience building secure, reliable enterprise applications with a security-first mindset Ability to own projects from technical design through deployment and production support Experience working closely with cross-functional engineering and product teams Strong troubleshooting, problem-solving, and communication skills Excellent written and verbal English communication skills Improve engineering leverage with AI tooling , automation, and internal workflows rather than using AI as a gimmick Nice to Have Experience building AI-powered applications, agentic systems, LLM integrations, or orchestration frameworks Experience with TypeScript or full-stack development Experience mentoring engineers or contributing to technical leadership Experience with observability, monitoring, logging, and performance optimization Experience working in fast-growing product or startup environments Responsibilities Design, develop, and maintain scalable backend services, APIs, and asynchronous processing systems Translate business requirements into robust technical solutions and scalable system designs Own services throughout their lifecycle, including deployment, monitoring, reliability, and continuous improvement Design efficient data models and optimize database performance for production workloads Collaborate with product, frontend, and platform teams to deliver end-to-end features Improve engineering productivity through automation and AI-assisted development workflows Participate in architecture discussions, code reviews, and technical decision-making Implement monitoring, logging, and observability solutions to ensure production reliability Continuously improve system scalability, performance, security, and maintainability Contribute to engineering best practices and knowledge sharing across the team

🏢 Summary: Senior Software Engineer role focused on developing scalable backend services and AI-powered features using Scala and Python in an international team. The position includes designing production-grade systems, API integrations, architectural decision-making, and supporting CI/CD processes in a fully remote B2B setup. 🗂️ Requirements: 7+ years of professional software development experience, Production experience with Scala, Strong Python knowledge, Experience building production-grade backend services, Knowledge of software engineering best practices, Experience with automated testing, Experience with version control systems, Experience with code review, Experience with CI/CD, Ability to design scalable and maintainable architecture, Ability to solve complex technical problems independently, Experience working in international teams, Advanced Polish language skills, English level B2 📃 Skills: Scala, Python, AI, API, CI/CD, LLM, Elasticsearch, AWS, Azure, GCP, PHP 🏢 Description: Poszukujemy doświadczonego Senior Software Engineera do międzynarodowego zespołu rozwijającego nowoczesne rozwiązania backendowe oraz funkcjonalności wykorzystujące technologie AI. Scala jest jedną z kluczowych technologii wykorzystywanych w projekcie, a istotna część codziennego developmentu realizowana jest również w Pythonie. Praca obejmuje rozwój skalowalnych usług backendowych, tworzenie nowych funkcjonalności oraz integracje z rozwiązaniami AI i zewnętrznymi usługami poprzez API. Szukamy osoby z dużym doświadczeniem w tworzeniu systemów produkcyjnych, która swobodnie porusza się w Scali i Pythonie, potrafi samodzielnie rozwiązywać złożone problemy techniczne oraz aktywnie uczestniczyć w podejmowaniu decyzji architektonicznych. Zakres obowiązków Tworzenie, utrzymanie i rozwijanie usług backendowych w Scali i Pythonie. Projektowanie skalowalnych i łatwych w utrzymaniu rozwiązań. Rozwój nowych funkcjonalności produktowych, w tym rozwiązań wykorzystujących AI. Integracja systemów z zewnętrznymi usługami poprzez API. Tworzenie czystego, testowalnego kodu produkcyjnego. Udział w podejmowaniu decyzji architektonicznych oraz code review. Dbanie o jakość, skalowalność, wydajność i bezpieczeństwo rozwijanych rozwiązań. Wsparcie i rozwój procesów CI/CD. Analiza oraz rozwiązywanie problemów występujących w środowisku produkcyjnym. Współpraca w ramach międzynarodowego zespołu. Wymagania Minimum 7 lat doświadczenia w profesjonalnym software development. Bardzo dobre doświadczenie produkcyjne w Scali. Dobra znajomość Pythona i doświadczenie w tworzeniu backendu klasy produkcyjnej. Doświadczenie w projektowaniu i rozwijaniu usług backendowych. Bardzo dobra znajomość dobrych praktyk software engineering. Doświadczenie z testami automatycznymi, kontrolą wersji, code review oraz CI/CD. Umiejętność projektowania skalowalnej i łatwej w utrzymaniu architektury. Samodzielność w analizowaniu i rozwiązywaniu złożonych problemów technicznych. Umiejętność efektywnej komunikacji i współpracy w międzynarodowym zespole. Znajomość języka polskiego na poziomie zaawansowanym. Znajomość języka angielskiego na poziomie B2. Mile widziane Komercyjne doświadczenie z LLM lub generatywną AI. Doświadczenie w integracji usług i modeli AI z systemami produkcyjnymi. Integracje z zewnętrznymi platformami poprzez API. Znajomość Elasticsearch. Doświadczenie z rozwiązaniami chmurowymi (AWS, Azure lub GCP). Znajomość PHP. Doświadczenie w rozwoju skalowalnych systemów. Wiedza z zakresu monitoringu, wydajności i optymalizacji kosztów infrastruktury. Oferujemy kontrakt B2B, stawka: daj znać, jaki poziom Cię interesuje praca zdalna, start projektu asap. Proces rekrutacyjny Screening. Rozmowa techniczna. Decyzja.

🏢 Summary: Senior Python Developer role focused on independently designing and delivering MVP features and Proofs of Concept on top of an existing large-scale SaaS and data connector platform. The position requires full ownership from idea to production, leveraging LLMs and AI tools to accelerate development and validation. It is a fully remote role emphasizing autonomy, fast experimentation, and scalable backend engineering. 🗂️ Requirements: 4+ years commercial experience with Python, Strong backend development experience, Experience building scalable systems, Ability to design and deliver MVPs and PoCs end-to-end, Experience integrating with cloud services, Experience with CI/CD pipelines, Hands-on use of LLMs/AI in development workflows, Ability to make pragmatic architecture decisions, Professional English proficiency 📃 Skills: Python, LLM, AI, SaaS, API, Cloud, CI/CD, React, TypeScript 🏢 Description: Does building awesome, innovative products that add up to something meaningful sound like a dream come true? Come join us and make that vision a reality! About We are looking for a Senior Python Developer who thrives in autonomy and enjoys building things from scratch — someone who prefers ownership over working in large, structured teams. In this role, you’ll independently deliver MVP features and Proofs of Concept end-to-end, building on top of an existing large-scale SaaS and data connector platform. This is not a typical corporate setup — we’re looking for someone with a startup mindset , who moves fast, experiments, and takes full responsibility for what they build. A key part of this role is the practical use of LLMs and AI tools in everyday development — to accelerate prototyping, coding, research, and validation. Responsibilities Independently design and build MVP features and PoCs end-to-end Take full ownership of solutions — from idea to production Validate technical feasibility and make pragmatic architecture decisions Leverage LLMs and AI tools to speed up development and exploration Write clean, maintainable, production-ready Python code Integrate with cloud services and CI/CD pipelines Collaborate with product/design when needed — but stay highly autonomous Our offer Competitive salary on B2B contract Fully remote position Real impact and independence at work Individual career path Work-life balance A non-corporate atmosphere where innovation, personal growth, and teamwork thrive 100+ smart, curious & ambitious engineers What you bring 4+ years of commercial experience with Python Strong backend focus and experience building scalable systems Experience working in startups or small teams — comfortable being a “go-to” person Ability to work independently and take full ownership of projects Hands-on experience using LLMs/AI in development workflows (e.g. prototyping, code generation, research) Product mindset, speed, and pragmatism Basic knowledge of frontend (e.g. React, TypeScript ) is a plus, not required Strong communication skills and proactive attitude Professional level of English Benefits International Projects Small Teams Flat Structure Friendly Atmosphere Flexible Hours Individual Career Path We want your TALENT! Don’t hesitate and APPLY! We are happy to tell you more details about this position in a phone call. Our recruitment process is very fast and straightforward to ensure a great experience from the first interview to joining your dream team!

🏢 Summary: Senior Python Engineer role focused on building and scaling a cloud-native real-time Data Platform handling massive datasets. The position involves developing high-performance backend services, optimizing distributed systems, and integrating large-scale data storage solutions. Hybrid work model in Warsaw with employment benefits including private medical care and multisport card. 🗂️ Requirements: 8+ years of backend software development experience, Advanced Python expertise, Experience with scalable production-grade systems, Knowledge of concurrency and multiprocessing, Experience with Pandas or NumPy, Experience with Parquet or JSON data formats, Knowledge of relational and NoSQL databases, Experience with performance optimization and low-latency systems, Ability to use AI-assisted development tools responsibly 📃 Skills: Python, Pandas, NumPy, Parquet, JSON, SQL, NoSQL, API, OOP, Concurrency, Multiprocessing, Algorithms, Databases, Cloud 🏢 Description: For our client, a leading, high-growth global fintech company – we are looking for an experienced Senior Python Engineer to join a key engineering team responsible for the company’s core data foundation. The project focuses on building, optimizing, and scaling a cloud-native, high-throughput Data Platform designed to ingest, process, and distribute massive datasets in real-time. This platform serves as the backbone for various downstream analytical systems, requiring extreme reliability, performance, and scalability. This is a fantastic opportunity for a strong Python generalist who enjoys solving complex distributed system problems, optimizing data flows, and working with modern cloud architectures. Responsibilities Backend & Pipeline Development: Design and develop scalable backend services and high-performance data processing pipelines using Python. Performance Tuning: Identify bottlenecks and optimize system performance, focus on concurrency, throughput, and low-latency execution. Data Integration & Storage: Build robust integrations with modern cloud-native storage solutions and databases to manage large-scale datasets efficiently. Collaborative Engineering: Work closely with cross-functional technical teams to understand data requirements and deliver reliable API services and platform features. Engineering Excellence: Maintain top-tier coding standards, emphasizing clean code, robust testing (unit/integration), automation, and security. Requirements 8+ years of professional backend software development experience (with a strong track record in building scalable, production-grade systems). Deep expertise in Python (advanced OOP, concurrency/multiprocessing, memory management, data structures, and algorithms). Solid experience with data-centric libraries such as Pandas, NumPy, or similar data processing frameworks. Experience with large-scale data storage formats (e.g., Parquet, JSON, or column-oriented databases) and relational/NoSQL databases. AI-assisted development mindset: Comfortable utilizing AI tools  to accelerate delivery, while maintaining strong developer judgment regarding validation, testing, security, and refactoring. What our client offers: Hybrid work model in Warsaw (minimum 3 days a week in the office - strictly non-negotiable). Contract of Employment (UoP) with increased tax-deductible costs (KUP). Private medical care (including full dental care). Lunch card to cover your daily meals. Multisport card.