Senior Fullstack Python Engineer

🏢 Summary: Senior Backend Developer role focused on designing and delivering scalable server-side applications and APIs using Python and Django for early-stage B2B SaaS products. The position involves architectural ownership, system reliability, and performance optimization in a fully remote, full-time setup. The developer will drive backend best practices, testing, and CI/CD processes. 🗂️ Requirements: 5+ years of backend development experience, Extensive experience with Python, Extensive experience with Django, Proficiency in data modelling, Experience with relational databases, Experience with non-relational databases, Ability to write complex SQL queries, Experience with API design, Experience with system integrations, Experience with distributed systems (synchronous and asynchronous), Hands-on experience with Docker, Hands-on experience with Redis, Experience with message brokers, Experience with cron jobs, Experience writing unit tests (e.g. Pytest), Strong understanding of code quality and testing best practices, Good command of English for technical communication 📃 Skills: Python, Django, SQL, Docker, Redis, Pytest, APIs, Databases, PostgreSQL, MongoDB, CI/CD, MessageBroker, Cron, Git 🏢 Description: Senior Backend Developer (Python/Django; 100% remote) 💰 Salary: 23,400-25,500 PLN/month 🌎 100% Remote 🕦 Full-time position ☑️ B2B or Contract of Employment We are looking for a Senior Backend Developer for a partner client with a compelling mission: they act as a product and technology partner for early-stage B2B SaaS founders, helping them navigate the crucial journey from launch to their first million in revenue. They essentially become the dedicated tech backbone for these startups. Requirements: 5+ years of professional backend development experience. Extensive, proven experience with Python and the Django framework. Proficient in data modelling, relational and non-relational databases, and complex SQL queries. Strong experience with API design, integrations, and distributed systems (synchronous & asynchronous communication). Hands-on experience with Docker, Redis, message brokers, and cron jobs. Expertise in writing unit tests (e.g., Pytest) and a commitment to code quality and testing best practices. Great understanding of English with strong communication and collaboration skills. Nice to have: Previous experience in Greentech or Ecotech is a significant plus. Experience as an unofficial tech lead or mentoring junior developers. Knowledge of additional testing methodologies (integration, end-to-end). Responsibilities: Lead the design and development of complex server-side applications, APIs, and databases, taking ownership of architectural decisions. Architect, write, and deliver high-quality, scalable, and efficient code using Python and Django. Collaborate closely with cross-functional teams, including front-end developers and the tech lead, to align backend development with project goals. Architect and implement advanced user authentication, authorisation, and security mechanisms. Conduct performance analysis and optimisation, identifying bottlenecks and implementing solutions. Drive the implementation of automated testing and CI/CD processes to ensure code reliability. Establish and enforce coding standards, conduct thorough code reviews, and document backend architecture and APIs. Take responsibility for system reliability, scalability, and security, ensuring best practices. Get to know DevsData We are a technology consulting company and a recruitment agency, delivering software solutions to clients from Europe and the US. We work 100% remotely, in an international team, including people from Asia, London, or San Francisco. We employ people with experience in international corporations as well as students of the best technical and business universities. Find out more: https://devsdata.com

🏢 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: Full-time hybrid contract for an experienced Python Fullstack Developer working on AI-driven automation and data transformation solutions in the financial sector. The role involves building scalable full-stack applications, REST APIs, microservices, and LLM-based solutions using Python, Flask, and React in an Agile international team. 🗂️ Requirements: Strong commercial experience with Python, Experience with Flask or similar Python frameworks, Knowledge of REST API development, Experience with Large Language Models, Experience with Docker, Knowledge of JavaScript, Experience with React, Understanding of PostgreSQL, SQL and SQLAlchemy, Experience writing automated tests with pytest, Experience with CI/CD pipelines, Knowledge of Git, English level B2/C1 📃 Skills: Python, Flask, REST, LLM, Docker, JavaScript, React, PostgreSQL, SQL, SQLAlchemy, pytest, CI/CD, Git, TypeScript, Redux, Zustand, AWS, Kubernetes, SharePoint, JFrog, CSS, SCSS 🏢 Description: Expert Python Fullstack Developer Location: Warsaw Work model: Hybrid (3 days per week in the office) Project duration: July 2026 – December 2026 B2B rate: up to 142 PLN/h Full-time (40h/week) About the project We are looking for an experienced Python Fullstack Developer to join an international team delivering innovative solutions for the financial sector. The project focuses on data transformation, AI-driven automation, and intelligent data enrichment, leveraging modern technologies including Large Language Models (LLMs) to improve operational efficiency and regulatory compliance. You will work closely with Product Owners, Architects, Analysts and other developers to transform business requirements into scalable, secure and high-quality software solutions. Your responsibilities - Design, develop and maintain modern full-stack applications. - Build backend services using Python and Flask. - Develop and maintain REST APIs and data integration services. - Implement AI-powered solutions using LLMs for automation and data enrichment. - Develop frontend components using React and JavaScript. - Build microservices and deployment pipelines. - Integrate with databases, external APIs and enterprise platforms. - Ensure data quality, reconciliation and regulatory compliance. - Write automated tests and participate in code reviews. - Collaborate with cross-functional, international teams in an Agile environment. We are looking for someone who has - Strong commercial experience with Python development. - Hands-on experience with Flask (or similar Python frameworks). - Solid knowledge of REST API development. - Experience working with Large Language Models (LLMs). - Experience with Docker. - Good knowledge of JavaScript. - Experience with React. - Good understanding of PostgreSQL, SQL and SQLAlchemy. - Experience writing automated tests (preferably using pytest). - Experience with CI/CD pipelines. - Good knowledge of Git. - Good command of English (B2/C1). Nice to have - AI development tools and frameworks. - TypeScript. - Redux or Zustand. - AWS Cloud. - Kubernetes. - SharePoint API. - JFrog Artifactory. - Web Components. - CSS / SCSS. What we offer - B2B rate of up to 142 PLN/hour. - Opportunity to work on innovative AI and data-driven solutions within the banking sector. - International and collaborative Agile environment. - Exposure to modern technologies including LLMs, cloud solutions and microservices. - Challenging project with real business impact. - Long-term cooperation with experienced engineering team.

🏢 Summary: Senior Python & React Full-Stack Engineer role focused on maintaining, troubleshooting, and enhancing an existing live product within a single-client environment. The position involves full-stack development, improving UI/UX, onboarding users, and ensuring system stability and performance. This is a remote EU-based role with strong emphasis on practical problem-solving and product evolution. 🗂️ Requirements: 6+ years of experience as Full Stack Developer/Engineer, Hands-on backend experience with Python, Solid frontend experience with React, Experience with databases, Experience with cloud environments (preferably Azure), Understanding of software development lifecycle, Experience maintaining and improving existing products, Strong debugging and issue-resolution skills, Fluent English, Legal right to work in Europe 📃 Skills: Python, React, SQL, Azure, Cloud, UI, UX, Debugging 🏢 Description: Build what matters—stabilize, improve, and evolve a live product used every day. Remote (EU) • Up to 5 remote days/week As a Senior Python & React Full-Stack Engineer , you will be working for our client on an existing software product used within a single-client environment. Instead of starting from scratch, you will maintain, troubleshoot, and enhance a live solution—helping it grow as new users onboard and new needs emerge. If you enjoy practical problem-solving across frontend and backend, this is the kind of role where your work has immediate impact. Your main responsibilities: Support the ongoing development and maintenance of an existing software product Troubleshoot and fix bugs reported by users during onboarding and day-to-day usage Implement improvements and new features based on user feedback and business needs Enhance the UI/UX experience to keep the platform intuitive and user-friendly Work across both backend and frontend layers of the application Collaborate with stakeholders to understand issues, prioritize enhancements, and deliver practical solutions Help onboard new users by ensuring the platform remains stable and effective Continuously improve code quality, usability, and performance You're ideal for this role if you have: 6+ years of experience as a Full Stack Developer / Full Stack Engineer Hands-on backend experience with Python Solid frontend experience with React Basic to solid experience with databases and cloud-based environments (preferably Azure ) A strong understanding of the software development lifecycle across frontend and backend Experience maintaining and improving existing products (not only building new systems) Strong debugging and issue-resolution skills with clean, practical fixes A product-minded approach with sensitivity to UI/UX and user needs It is a strong plus if you have: (optional) Experience working on client-facing internal tools or single-client product environments Exposure to product support, user onboarding, or post-launch optimization Enthusiasm for AI and a practical understanding of how it works (without training models) Familiarity with Azure cloud-based application architecture Language Required for the role : English (Fluent) 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: Mid-level Software Engineer contractor role focused on designing, building, and maintaining scalable backend services and data pipelines using Python. The position involves migrating SAS code to Python, developing APIs, and contributing to testing, deployment, and architectural decisions in a fast-paced environment. The role requires on-site proximity to the San Francisco Peninsula and offers $70–$80/hour compensation. 🗂️ Requirements: Bachelor's Degree, Within 1-hour commuting distance to San Francisco Peninsula, 3–5 years professional software development experience, Strong proficiency in Python, Experience with Django or Flask or FastAPI, Experience building RESTful or GraphQL APIs, Understanding of data structures, algorithms, OOP, Experience with relational or NoSQL databases, Experience with Git, Familiarity with CI/CD pipelines, Working knowledge of AWS or GCP or Azure, Ability to write unit and integration tests 📃 Skills: Python, Django, Flask, FastAPI, REST, GraphQL, PostgreSQL, MySQL, MongoDB, Git, CICD, AWS, GCP, Azure, OOP, Algorithms, DataStructures, NoSQL, Testing, SAS 🏢 Description: About The Role We are seeking a mid-level Software Engineer with strong Python experience to join our growing engineering team. You will design, build, and maintain scalable applications and services, collaborate cross-functionally, and help drive best practices in coding, testing, and deployment. This role is ideal for an engineer who is comfortable working in fast-moving environments and is passionate about building high-quality software.This is a 1099 independent contractor position. Key Responsibilities Design, develop, and maintain backend services, APIs, and data pipelines using Python. Migrate and convert existing SAS code to Python, ensuring functionality and performance parity. Collaborate with product managers, designers, and fellow engineers to define requirements and deliver solutions. Write clean, maintainable, and well-tested code. Participate in code reviews and provide constructive feedback. Debug, troubleshoot, and improve application performance and reliability. Contribute to architectural discussions and implementation strategies. Help automate workflows and improve development processes. Maintain documentation of systems, workflows, and features. Support production systems and participate in on-call rotations (if applicable). Required Qualifications: Bachelor's Degree Candidates must be based within 1 Hr. commuting proximity to our office in the San Francisco Peninsula 3–5 years of professional software development experience. Strong proficiency in Python and familiarity with frameworks such as Django, Flask, or FastAPI. Experience building RESTful or GraphQL APIs. Solid understanding of software engineering fundamentals: data structures, algorithms, OOP. Experience with relational and/or NoSQL databases (e.g., PostgreSQL, MySQL, MongoDB). Familiarity with version control (Git) and CI/CD pipelines. Working knowledge of cloud platforms (AWS, GCP, or Azure). Ability to write unit/integration tests. Excellent problem-solving and communication skills. Preferred: Experience with AWS services (Lambda, EC2, DynamoDB, S3, API Gateway, etc.). Experience with containerization (Docker, Kubernetes). Data pipeline or ETL experience. Experience with Terraform for infrastructure as code. Experience with monitoring and observability tools. Experience with SAS. Exposure to Agile/Scrum methodologies. Compensation: $70 - $80/HR

🏢 Summary: Senior Software Engineer role focused on building and operating production features across a modern AWS stack using TypeScript, .NET, and Python. The position offers end-to-end ownership in a fast-moving US-based engineering team with strong emphasis on AI-assisted development workflows and cloud infrastructure. Engineers are expected to collaborate remotely, manage services in AWS, and contribute to engineering standards in a high-trust environment. 🗂️ Requirements: 4–7 years of professional software engineering experience, Hands-on experience with AI coding tools, Strong AWS experience, Experience with ECS and Batch, Infrastructure-as-code experience with Terraform, Proficiency in TypeScript, .NET, or Python, Ability to work across multiple programming languages, Experience with system/API design, Experience with testing and CI/CD, Strong written English, Ability to work effectively with a remote US-based team 📃 Skills: AWS, TypeScript, Python, .NET, Terraform, ECS, Batch, Bedrock, CI/CD, APIs, Copilot, Cursor, Claude 🏢 Description: Software Engineer (.NET/Typescript/Python) 💰 Salary: 5000-9000$ per month 🕦 Full-time ☑️ B2B 🌴Hybrid We are looking for a Senior Software Engineer to join a US-based engineering and product leadership team, with end-to-end ownership of real features on a modern AWS stack. The team moves fast, ships continuously, and expects engineers to use AI coding tools as a core part of how they work. For those seeking genuine ownership in a small, high-trust environment without the bureaucracy of a large captive center, this is that opportunity. Requirements 4–7 years of professional software engineering experience building and shipping production systems. Demonstrated hands-on experience with AI coding tools and a track record of using them to materially increase output, we'll want to hear specifics about how you work. Strong AWS experience, comfortable designing, deploying, and operating services on the AWS stack, with hands-on exposure to container and batch workloads (ECS, Batch) and infrastructure-as-code (Terraform). Proficiency in one or more of TypeScript, .NET, or Python, with the adaptability to work across all three. Proven ability to thrive in a fast-paced environment where priorities move and you own outcomes, not just tickets. Solid fundamentals in system/API design, testing, and CI/CD. Strong written English and the self-direction to work effectively with a remote, US-based team. Nice to have Experience as an early engineer on a new team, product, or site. Hands-on work with AWS Bedrock or other LLM/GenAI services in production. Experience in marketing measurement and optimization, marketing mix modeling, attribution, media/marketing analytics, or adjacent analytic fields such as data science platforms, experimentation, or large-scale data processing. Familiarity with building data- or analytics-intensive applications. Key Responsibilities Design, build, and ship production features across the stack, owning your work from design through deployment and operation. Use AI development tools (Copilot, Cursor, Claude, and similar) fluently to accelerate delivery, scaffolding, refactoring, testing, and debugging at high velocity. Build and run services on AWS, primarily ECS, Batch, and Bedrock, taking real responsibility for reliability, performance, and cost of what you ship. Work across the stack in TypeScript, .NET, and Python, with infrastructure managed as code in Terraform. Collaborate closely with US engineering and product partners across time zones, communicating clearly in writing and keeping work visible. Contribute to the engineering standards, practices, and culture of a brand-new team, your habits set the bar for who comes next.

🏢 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 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: Full-time B2B opportunity for a Middle Python Engineer to build scalable backend systems and AI infrastructure for enterprise applications in a hybrid Warsaw setup. The role involves developing REST APIs, distributed systems, and cloud-based services while owning features through the full software lifecycle. Candidates will work in an AI-native environment focused on production-ready enterprise AI solutions. 🗂️ Requirements: 3-5 years commercial experience as Backend Engineer, Strong Python programming skills, Understanding of distributed systems, Experience with AWS, GCP, or Azure, Strong knowledge of SQL databases, Strong knowledge of NoSQL databases, Experience designing and supporting production-grade systems, Experience with full software lifecycle ownership, Ability to develop scalable backend services and REST APIs, Comfortable working in AI-native engineering environments 📃 Skills: Python, AWS, GCP, Azure, SQL, NoSQL, REST, TypeScript 🏢 Description: Python Engineer 💰 Salary: 5000-7000$ 🌎 Warsaw, Hybrid (1 day remote per week) 🕦 Full-time ☑️ B2B Contract We’re looking for a Middle Python Engineer for our client, which is an AI infrastructure company that helps large enterprises safely and effectively adopt AI in their daily operations. Rather than building general-purpose AI, our client creates a platform that connects AI to a company's internal knowledge, policies, workflows, and business rules. This enables AI to provide accurate answers and automate complex business processes instead of relying on generic responses or potentially inaccurate information. Their customers include well-known enterprise organizations such as Glovo, Nespresso, and HelloFresh, where AI is used to improve internal operations, customer support, and business efficiency. The company operates in the rapidly growing field of Agentic AI, focusing on building reliable, production-ready AI systems for enterprise environments. Requirements: 3-5 years of commercial experience as a Backend Engineer developing production-grade systems. Strong Python programming skills, with the ability to write clean, maintainable, and well-structured backend code. Good understanding of distributed systems. Hands-on experience with cloud platforms, such as AWS, GCP, or Azure. Strong knowledge of SQL and NoSQL databases, including schema and data model design. Experience owning features throughout the full software lifecycle, from design and implementation to deployment, monitoring, and production support. Comfortable working in an AI-native engineering environment. Nice to have: Exposure to agentic systems: AI agents, tool-calling, orchestration, retrieval, or LLM-backed infrastructure Working knowledge of TypeScript Responsibilities: Design, develop, and maintain scalable backend services, REST APIs, data pipelines, and background processing systems. Translate business and product requirements into technical solutions, evaluating architecture, trade-offs, and implementation approaches. Own features end-to-end, from technical design and development through deployment, monitoring, and ongoing production support. Build reliable, secure, and high-performance backend systems that support enterprise AI applications. Design efficient interfaces, data models, and service architectures that integrate seamlessly within the broader platform. Monitor, troubleshoot, and improve system reliability, observability, scalability, and performance in production environments. Collaborate closely with Product Managers, Frontend Engineers, and Platform/Infrastructure teams to deliver end-to-end product features. Write clear technical documentation, design notes, and architecture diagrams to support collaboration and knowledge sharing. Leverage AI-powered development tools to improve engineering productivity, automate repetitive tasks, and streamline development workflows. Participate in code reviews and design reviews, ensuring high engineering standards, maintainable code, and best practices.

🏢 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!