April 26, 2026
Staff Engineer (Python)
Senior • Remote
Warsaw, Poland
For our international client - AI product company - we are looking for an experienced Staff Python Engineer.
RESPONSIBILITIES
- Own parts of our core backend infrastructure, which is a complex, real-time distributed system written in Python and Rust.
- Own big initiatives end-to-end and deliver them with minimal guidance.
- Troubleshoot highly complex production issues.
- Constantly improve our development velocity while maintaining a very high reliability standard.
REQUIREMENTS
- 10+ years of experience in Python development as a Staff/Principal Engineer.
- Strong Python Asyncio experience.
- Strong software design skills.
- Significant experience with at least one strongly typed language (Rust, C++, Go, Swift, Java, etc).
- Deep understanding of Networking Protocols, Operating Systems.
- Deep knowledge of Python Profiling.
- Experience in delivering and troubleshooting a production-grade cloud-based distributed system and a real-time low-level system (e.g. kernel, drivers, RTOS).
- Experience with Kubernetes, Helm and different observability stacks.
- Strong LLM prompting skills, but also being able to work without them.
- Experience with gRPC and its troubleshooting.
- Being a contributor or maintainer of an open-source package.
- Excellent communication skills, both verbal and written.
- BSc in Software Development or equivalent industry experience.
NICE TO HAVE
- An understanding of one of the following: WebRTC, STUN/TURN, SIP, RTP, HLS, RTMP.
- Having worked with Rust and PyO3.
- Audio programming experien.
WHAT DO WE OFFER ON THIS PROJECT?
- Cooperation based on a B2B contract and rate paid in USD.
- 100% remote work.
- The support of a dedicated mentor. In the relationship, we focus on direct communication. When you join speedapp, you will be put in touch with a dedicated mentor who will make sure that you enjoy working with us and with the client.
- Events and integration meetings, as well as participation in various initiatives, e.g., sports.
- Access to the benefits offering (medical care, life insurance, Multisport card).
WHAT DOES THE RECRUITMENT PROCESS LOOK LIKE?
Application: Apply and submit your CV.
After the application review, the recruiter will contact selected candidates by phone.
Screening: Have a conversation with a speedapp recruiter about your experience.
Next steps: The speedapp recruiter will explain the recruitment process for the specific position.
The speedapp recruiter will stay in touch with you throughout the entire process.
ABOUT SPEEDAPP
At speedapp, we believe that an organization is only as good as the people who make it up. We are a team of IT experts and other professionals working for our clients around the world (including Israel, Austria, USA). We go far beyond the HR category. We build IT teams and also help manage them.
👉 10 years of experience
👉 +100 clients worldwide
👉 +300 hires per year
💎 We have won the prestigious "Forbes Diamonds" award four times (2022, 2023, 2024, 2025). We are a member of the European Fast Growth Icons network and FinTech Poland. We are ranked 18th among the 100 fastest growing companies 2023 by Clutch.
DO YOU HAVE ANY QUESTIONS?
Contact the recruiter responsible for this process directly.
Anna Więckowska
Junior IT Delivery Consultant
anna.wieckowska@speedapp.pl
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On-site
Gdansk, Poland
🏢 Summary: Senior Python Developer role within an AI-native full-stack team building a cutting-edge quantitative investment platform. The position focuses on developing scalable back-end systems and RESTful APIs using FastAPI and Python, ensuring security, performance, and cloud integration. The project delivers an AI-driven, human-centric investment ecosystem transforming decision-making processes. 🗂️ Requirements: Bachelor's degree in Computer Science, Engineering or related field or equivalent experience, 3+ years of back-end development experience with FastAPI and Python, Strong knowledge of server-side logic and database management, Expertise in Amazon Web Services, Experience with FastAPI and REST API development, Background in Gen AI assisted development, Proficiency with Git or other version control systems, B1+ English proficiency 📃 Skills: Python, FastAPI, REST, AWS, Git, GenAI, Databases 🏢 Description: We are looking for a dynamic, hands-on Senior Python Developer to join a full-stack AI native feature team for building a cutting-edge quantitative investment platform. The project aims to deliver a groundbreaking, AI-driven investment ecosystem that revolutionizes the entire investment process through an intuitive and human-centric design approach. This initiative transcends mere digitization, aiming to redefine investment decision-making with systematic, transparent and intelligent solutions. The platform is designed with the versatility to cater to a wide array of users and offers transformative capabilities for the investment landscape. Responsibilities Design, develop, and maintain robust and scalable back-end systems using FastAPI and Python Implement security and data protection measures to ensure the integrity and confidentiality of data Optimize applications for maximum speed and scalability Develop and maintain RESTful APIs for seamless communication between different components of the application Conduct code reviews and provide mentorship to ensure code quality and adherence to best practices Troubleshoot and resolve complex technical issues and bugs in a timely manner Stay up-to-date with the latest industry trends and technologies to continuously improve development processes and system performance Requirements Bachelor's degree in Computer Science, Engineering, or a related field, or equivalent practical experience 3+ years of proven experience as a Back-End Developer with a focus on FastAPI and Python Strong understanding of server-side logic and database management Expertise in Amazon Web Services Knowledge of FastAPI and REST API Background in Gen AI Assisted Development Familiarity with version control systems such as Git Excellent problem-solving skills and attention to detail Strong communication and collaboration skills Ability to work independently and as part of a team in a fast-paced environment B1+ English level proficiency Nice to have Skills in Cursor Proficiency in ReactJS We offer We gather like-minded people: Engineering community of industry professionals Friendly team and enjoyable working environment Flexible schedule and opportunity to work remotely within Poland Chance to work abroad for up to 60 days annually Business-driven relocation opportunities We provide growth opportunities: Outstanding career roadmap Leadership development, career advising, soft skills, and well-being programs Certification (GCP, Azure, AWS) Unlimited access to LinkedIn Learning, Get Abstract, Cloud Guru English classes We cover it all: Stable income (Employment Contract or B2B) Participation in the Employee Stock Purchase Plan Benefits package (health insurance, multisport, shopping vouchers) Strategically located offices featuring entertainment and relaxation zones, table tennis and football, free snacks, fantastic coffee, and more Referral bonuses Corporate, social and well-being events Please, note: The set of bonuses might vary based on the role you apply for – specifics will be discussed with our recruiter during the general interview. We will reach out to selected candidates exclusively. EPAM is a leading global provider of digital platform engineering and development services. We are committed to having a positive impact on our customers, our employees, and our communities. We embrace a dynamic and inclusive culture. Here you will collaborate with multi-national teams, contribute to a myriad of innovative projects that deliver the most creative and cutting-edge solutions, and have an opportunity to continuously learn and grow. No matter where you are located, you will join a dedicated, creative, and diverse community that will help you discover your fullest potential.
Technology
EPAM Systems
Senior Python Engineer
Senior
Hybrid
Wroclaw, Poland
🏢 Summary: Senior Python Engineer role focused on building and optimizing an ML-ready portfolio platform, including migration to Azure-native Databricks. The position involves big data processing, ETL development, and performance tuning using Spark and Delta technologies. The engineer will also enhance and secure data pipelines within a cloud-based environment. 🗂️ Requirements: 3+ years of experience with Python, Proficiency in Python ETL tools and processes, Strong experience with FastAPI, Experience with Big Data processing, Experience with Databricks, Experience with Azure cloud environment, Experience with Java Spark, Experience with Delta tables, Experience updating and managing library dependencies for security 📃 Skills: Python, FastAPI, Databricks, Azure, Spark, Java, Delta, ETL, BigData, ML 🏢 Description: We are seeking a Senior Python Engineer with experience in FastAPI and ideally exposure to React UI, for our client, a global leader in banking, investment banking, and financial services. The product is an ML-ready platform for rapid portfolio model development and deployment. It combines data governance, Big Data, and AI — including GenAI capabilities — to boost alpha generation, enhance client services, and ensure regulatory compliance, while improving data quality and cost efficiency. The team is currently migrating from an IaaS Big Data platform to Azure-native Databricks. This position offers a flexible hybrid work model, with 3 days per week working from the office located in Wroclaw. Responsibilities Migrate and optimize data using Databricks optimization techniques Manage big data Tune models for Azure with Java Spark and Delta tables Address vulnerabilities through library version updates Requirements 3+ years of proven experience with Python Bachelor’s or Master’s degree in Computer Science, Information Technology, or a related field Proficiency in Python ETL tools and processes, and FastAPI Strong communication and collaboration skills English language proficiency at an Upper-Intermediate level (B2) or higher Nice to have Experience and knowledge of React.js We offer/Benefits We gather like-minded people: Engineering community of industry professionals Friendly team and enjoyable working environment Flexible schedule and opportunity to work remotely within Poland Chance to work abroad for up to 60 days annually Business-driven relocation opportunities We provide growth opportunities: Outstanding career roadmap Leadership development, career advising, soft skills, and well-being programs Certification (GCP, Azure, AWS) Unlimited access to LinkedIn Learning, Get Abstract, Cloud Guru English classes We cover it all: Stable income (Employment Contract or B2B) Participation in the Employee Stock Purchase Plan Benefits package (health insurance, multisport, shopping vouchers) Strategically located offices featuring entertainment and relaxation zones, table tennis and football, free snacks, fantastic coffee, and more Referral bonuses Corporate, social and well-being events Please, note: The set of bonuses might vary based on the role you apply for – specifics will be discussed with our recruiter during the general interview. We will reach out to selected candidates exclusively. EPAM is a leading global provider of digital platform engineering and development services. We are committed to having a positive impact on our customers, our employees, and our communities. We embrace a dynamic and inclusive culture. Here you will collaborate with multi-national teams, contribute to a myriad of innovative projects that deliver the most creative and cutting-edge solutions, and have an opportunity to continuously learn and grow. No matter where you are located, you will join a dedicated, creative, and diverse community that will help you discover your fullest potential.