Senior Software Engineer (Python, Golang, Kubernetes)

🏢 Summary: The role involves end-to-end ownership of core Python services powering computational pathology and image analysis in Oncology R&D AI, with a focus on scalable microservice architecture. You will design, deploy, and operate distributed systems on Kubernetes and AWS, ensuring reliability, performance, and security. The position requires strong expertise in Python, Go, cloud infrastructure, and distributed systems. 🗂️ Requirements: Expert-level production experience with Python, Hands-on experience with Golang, Strong knowledge of microservices and distributed systems, Experience designing REST or gRPC APIs, Experience with SQL and NoSQL databases, Experience with Kubernetes in production, Strong Unix/Linux knowledge, Practical experience with AWS services (EKS, EC2, S3, RDS, IAM, CloudWatch), Experience with CI/CD and automated testing, Ability to design scalable and cost-efficient architectures 📃 Skills: Python, Golang, Kubernetes, AWS, EKS, EC2, S3, RDS, IAM, CloudWatch, SQL, NoSQL, REST, gRPC, Unix, Linux, CI/CD 🏢 Description: Holisticon Connect is a division within NEXER GROUP - a custom software development company. We started in Poland in 2017 and are now a team of over 140 people. We have the opportunity to work with world-renowned brands from Scandinavia, the UK, and Western Europe. Our goal is to grow stronger, in competence rather than in numbers. If you like what we do, check out our offer, maybe we will have the pleasure of meeting you! 😊 We are looking for a Software Engineer (Python, Go, Kubernetes). You will take end-to-end ownership of core Python services that power computational pathology and image analysis within Oncology R&D AI , keeping them robust, scalable, and well maintained. You’ll help shape our microservice architecture by defining clear service boundaries and interfaces, guiding key design decisions, and driving improvements in reliability and performance across the platform. You might be the perfect match if you are/have: Expert-level production experience with Python and solid hands-on experience with Golang for building and operating services. Deep understanding of microservices, distributed systems, and API design ( REST/gRPC ), with a focus on clean contracts and handling failure modes. Practical experience with SQL and NoSQL databases, including schema design, performance tuning, and familiarity with object storage solutions (e.g., S3). Proven experience deploying and operating services on Kubernetes , along with strong Unix/Linux fundamentals. Practical knowledge of key AWS services (EKS, EC2, S3, RDS, IAM, CloudWatch) and the ability to design cost‑efficient architectures. Strong engineering practices, including CI/CD, automated testing, code reviews, documentation, and a security-first mindset. Ability to lead technical initiatives, clearly communicate trade-offs, and collaborate effectively across multidisciplinary teams. Great to have experience with ML training/inference frameworks, e.g. PyTorch. Moreover, we appreciate skills in these areas: Experience with ML/AI tooling such as Kubeflow, MLflow, Feast, Argo, Airflow, Ray , and model versioning/monitoring solutions. Experience with large-scale image processing or digital pathology data (e.g., whole‑slide images) using libraries such as OpenSlide , scikit-image, or OpenCV . Experience with performance engineering, including concurrency, memory profiling, high‑throughput data pipelines, and GPU/accelerator integration. Experience working in regulated environments (e.g., GxP), including data governance, privacy requirements, and developing software under regulated processes. Experience with JavaScript/TypeScript for building internal tools and dashboards. Experience with event‑driven architectures and streaming platforms (e.g., Kafka ). By joining us, you gain the following: Opportunity to work on exciting, international projects in cutting-edge industries like Automotive, Biotech, IoT; Possibility to develop in cloud technologies; Becoming part of a team that believes that the next step to a promising future is to put your heart into it and make it happen; Respect for your private life so you don't have to work overtime or on weekends; Team Events budget to socialize outside of work; Company Events to celebrate smaller and bigger successes (Summer Party, Programmer's Day, and trips abroad – so far we've been in South Africa, Are, and Barcelona). Perks and benefits: Fully remote work or in our office in Wrocław; Benefits such as Luxmed , Multisport , and life insurance in Nationale Nederlanden ; Attractive referral system (9,5k for senior, 6k for mid, 2,5k for junior); Personal Training Budget with additional paid hours; Passion Day - an extra day off for your hobby to spend as you please; Flexible working hours with no micro-management approach. Our core hours are 9-15, the rest of the working time is up to you; We provide high-quality work equipment + 2 additional monitors and accessories. If you apply for this position and match our expectations, then: You will be invited for an HR screening to get to know your experience, expectations, and motivation; You will complete a coding test (HackerRank) to demonstrate your technical skills; You will be invited for a technical interview (~60 minutes) to discuss your approach, problem-solving, and frontend expertise in more depth; You will meet the team members to learn more about the project and see how we collaborate on a daily basis. Submit your application online in one easy step! Apply now!

🏢 Summary: The offer is for a Software Developer to build and scale computational pathology workflows, contributing to the development of an AI-driven diagnostic product. The role focuses on designing efficient data-handling pipelines, improving tooling, and ensuring high-quality, compliant software in a regulated environment. You will work cross-functionally to deliver robust solutions supporting clinical diagnostics. 🗂️ Requirements: Strong programming experience in Python, Strong programming experience in Go, Experience with software engineering best practices, Experience with unit testing and code quality practices, Experience in data modeling and data processing, Experience working with data warehouses, Experience with containerized environments, Experience with CI platforms, Ability to work in regulated environments, Experience with image processing or computer vision 📃 Skills: Python, Go, Pydantic, Pandas, DBT, Snowflake, OpenCV, Docker, GitHub, TypeScript, Node.js, JavaScript 🏢 Description: Holisticon Connect is a division within NEXER GROUP - a custom software development company. We started in Poland in 2017 and are now a team of over 140 people. We have the opportunity to work with world-renowned brands from Scandinavia, the UK, and Western Europe. Our goal is to grow stronger, in competence rather than in numbers. If you like what we do, check out our offer, maybe we will have the pleasure of meeting you! 😊 For a fast‑growing and ambitious Computational Pathology team , we are looking for a Software Developer with a strong background in data‑handling workflows . The team’s mission is to build and scale a robust pipeline of computational pathology–based scoring methods, with the goal of improving clinical outcomes and transforming traditional diagnostic practices. Ultimately, the team is working toward the development of a first‑in‑class computational pathology–based diagnostic (Dx) product and establishing a leading position in AI‑driven diagnostic solutions with proven clinical value. I n this role you will support development of computational pathology workflows by, working cross-functionally to collect and understand user requirements, establish workflow designs and efficient software solutions. Developing novel, or improve existing tools used in the computational pathology workflows. Add new features, fix bugs, raise test coverage and improve documentation and work towards ensuring compliance of processes and developed tooling. We offer a choice of employment form: B2B or Employment Contract UoP: 14 000 – 16 000 PLN gross/month B2B: 120 – 140 PLN net/hour + VAT You might be the perfect match if you are/have: Strong expertise in Python and Go , demonstrated through hands‑on programming experience and real‑world projects. Software engineering best practices, with the aim of writing modern, bug-free code, proper documentation of code, unit-testing, code quality, etc. Interest in understanding of business processes and providing fit-for-purpose solutions. Moreover, we appreciate skills in these areas: Data modeling and processing with libraries such as Pydantic and Pandas , and data transformations using DBT and warehouses like Snowflake . Image processing/Computer Vision problems, e.g. experience with OpenCV. Containerized environments and CI platforms e.g. Github actions. Experience of working in a regulated environment, developing code under pre-set regulatory rules. Front-end development using TypeScript/Node/JavaScript. By joining us, you gain the following: Opportunity to work on exciting, international projects in cutting-edge industries like Automotive, Biotech, IoT; Possibility to develop in cloud technologies; Becoming part of a team that believes that the next step to a promising future is to put your heart into it and make it happen; Respect for your private life so you don't have to work overtime or on weekends; Team Events budget to socialize outside of work; Company Events to celebrate smaller and bigger successes (Summer Party, Programmer's Day, and trips abroad – so far we've been in South Africa, Are, and Barcelona). Perks and benefits: Fully remote work or in our office in Wrocław; Benefits such as Luxmed , Multisport , and life insurance in Nationale Nederlanden ; Attractive referral system (9,5k for senior, 6k for mid, 2,5k for junior); Personal Training Budget with additional paid hours; Passion Day - an extra day off for your hobby to spend as you please; Flexible working hours with no micro-management approach. Our core hours are 9-15, the rest of the working time is up to you; We provide high-quality work equipment + 2 additional monitors and accessories. If you apply for this position and match our expectations, then: 1) You will be invited to an HR Screening with our IT Recruiter. 2) You will have a technical interview. 3) Decision. Submit your application online in one easy step! Apply now!

🏢 Summary: Hands-on Python Software Developer role in a Computational Pathology team focused on building internal tools for processing and managing whole slide imaging (WSI) data within a regulated AI environment. The position involves developing data ingestion pipelines, image processing workflows, metadata management, and lightweight UIs while ensuring data quality, compliance, and software reliability. The role requires close collaboration with scientists and pathologists to support research and AI development activities. 🗂️ Requirements: Strong Python programming skills, Experience with data processing and file-based pipelines, Experience working with image or signal data, Knowledge of SQL and data warehousing solutions, Experience with CI/CD pipelines and packaging, Experience building lightweight UIs in Python, Minimum 5 years of residence in Poland 📃 Skills: Python, OpenCV, scikit-image, PIL, SQL, Snowflake, DBT, GitHub, Docker, NiceGUI, Streamlit, Gradio 🏢 Description: Holisticon Connect is a division within NEXER GROUP - a custom software development company. We started in Poland in 2017 and are now a team of over 140 people. We have the opportunity to work with world-renowned brands from Scandinavia, the UK, and Western Europe. Our goal is to grow stronger, in competence rather than in numbers. If you like what we do, check out our offer, maybe we will have the pleasure of meeting you! 😊 We are looking for Software Developer – to join a Computational Pathology team focused on building internal tools that enable pathology data to flow from digital scanners into a regulated AI environment. The work involves processing and managing whole slide imaging (WSI) data, ensuring data quality, handling metadata, and supporting compliant data preparation workflows. This is a hands-on Python development role with a strong focus on data processing, automation, and software reliability. You'll collaborate closely with scientists and pathologists to design, develop, test, and maintain tools that support research and AI development activities. Your tasks: Data ingestion and metadata pipelines for whole slide images De-identification and integrity checking of WSI files Dataset splitting and stratification tools Lightweight review and management UIs CI, packaging, and test coverage for the above We offer a choice of employment form: B2B or Employment Contract UoP: 14 000 – 16 000 PLN gross/month B2B: 120 – 140 PLN net/hour + VAT You might be the perfect match if you are/have: Strong Python — you write clean, testable, well-documented code; Comfort working with data, tabular data, file-based pipelines, validation, transformation; Experience working with image or signal data eg. OpenCV, scikit-image, PIL, other; SQL and data warehousing (Snowflake, DBT, or similar); CI/CD pipelines nand packaging (GitHub Actions, Docker); Lightweight UI work in Python (NiceGIU, Streamlit, Gradio, or similar); Located in Poland for at least 5 years. Moreover, we appreciate skills in these areas: Background in a regulated or quality-managed environment (e.g. medical, clinical, GxP, ISO, automotive, aerospace). By joining us, you gain the following: Opportunity to work on exciting, international projects in cutting-edge industries like Automotive, Biotech, IoT; Possibility to develop in cloud technologies; Becoming part of a team that believes that the next step to a promising future is to put your heart into it and make it happen; Respect for your private life so you don't have to work overtime or on weekends; Team Events budget to socialize outside of work; Company Events to celebrate smaller and bigger successes (Summer Party, Programmer's Day, and trips abroad – so far we've been in South Africa, Are, and Barcelona). Perks and benefits: Fully remote work or in our office in Wrocław; Benefits such as Luxmed , Multisport , and life insurance in Nationale Nederlanden ; Attractive referral system (9,5k for senior, 6k for mid, 2,5k for junior); Personal Training Budget with additional paid hours; Passion Day - an extra day off for your hobby to spend as you please; Flexible working hours with no micro-management approach. Our core hours are 9-15, the rest of the working time is up to you; We provide high-quality work equipment + 2 additional monitors and accessories. If you apply for this position and match our expectations, then: 1) You will be invited to an HR Screening with our IT Recruiter. 2) You will have a technical interview with customer 3) Decision Submit your application online in one easy step! Apply now!

🏢 Summary: Software Developer role focused on building and scaling computational pathology workflows to support development of AI-driven diagnostic solutions. The position involves designing data-handling pipelines, developing and improving tools, and ensuring code quality and regulatory compliance. The role includes cross-functional collaboration to deliver robust, production-ready software for clinical applications. 🗂️ Requirements: Strong Python programming experience, Experience with data modeling and data processing, Knowledge of software engineering best practices, Experience with unit testing and code quality practices, Experience with data transformation tools, Experience with data warehouses, Experience with image processing or computer vision, Experience with containerized environments, Experience with CI platforms, Ability to work in regulated environments, Experience with front-end development using TypeScript/JavaScript/Node.js 📃 Skills: Python, Pydantic, Pandas, DBT, Snowflake, OpenCV, Docker, GitHub, CI, TypeScript, JavaScript, Node.js 🏢 Description: Holisticon Connect is a division within NEXER GROUP - a custom software development company. We started in Poland in 2017 and are now a team of over 140 people. We have the opportunity to work with world-renowned brands from Scandinavia, the UK, and Western Europe. Our goal is to grow stronger, in competence rather than in numbers. If you like what we do, check out our offer, maybe we will have the pleasure of meeting you! 😊 For a fast‑growing and ambitious Computational Pathology team , we are looking for a Software Developer with a strong background in data‑handling workflows . The team’s mission is to build and scale a robust pipeline of computational pathology–based scoring methods, with the goal of improving clinical outcomes and transforming traditional diagnostic practices. Ultimately, the team is working toward the development of a first‑in‑class computational pathology–based diagnostic (Dx) product and establishing a leading position in AI‑driven diagnostic solutions with proven clinical value. I n this role you will support development of computational pathology workflows by, working cross-functionally to collect and understand user requirements, establish workflow designs and efficient software solutions. Developing novel, or improve existing tools used in the computational pathology workflows. Add new features, fix bugs, raise test coverage and improve documentation and work towards ensuring compliance of processes and developed tooling. We offer a choice of employment form: B2B or Employment Contract UoP: 14 000 – 16 000 PLN gross/month B2B: 120 – 140 PLN net/hour + VAT You might be the perfect match if you are/have: Strong expertise in Python , demonstrated through hands‑on programming experience and real‑world projects. Software engineering best practices, with the aim of writing modern, bug-free code, proper documentation of code, unit-testing, code quality, etc. Interest in understanding of business processes and providing fit-for-purpose solutions. Moreover, we appreciate skills in these areas: Data modeling and processing with libraries such as Pydantic and Pandas , and data transformations using DBT and warehouses like Snowflake . Image processing/Computer Vision problems, e.g. experience with OpenCV. Containerized environments and CI platforms e.g. Github actions. Experience of working in a regulated environment, developing code under pre-set regulatory rules. Front-end development using TypeScript/Node/JavaScript. By joining us, you gain the following: Opportunity to work on exciting, international projects in cutting-edge industries like Automotive, Biotech, IoT; Possibility to develop in cloud technologies; Becoming part of a team that believes that the next step to a promising future is to put your heart into it and make it happen; Respect for your private life so you don't have to work overtime or on weekends; Team Events budget to socialize outside of work; Company Events to celebrate smaller and bigger successes (Summer Party, Programmer's Day, and trips abroad – so far we've been in South Africa, Are, and Barcelona). Perks and benefits: Fully remote work or in our office in Wrocław; Benefits such as Luxmed , Multisport , and life insurance in Nationale Nederlanden ; Attractive referral system (9,5k for senior, 6k for mid, 2,5k for junior); Personal Training Budget with additional paid hours; Passion Day - an extra day off for your hobby to spend as you please; Flexible working hours with no micro-management approach. Our core hours are 9-15, the rest of the working time is up to you; We provide high-quality work equipment + 2 additional monitors and accessories. If you apply for this position and match our expectations, then: 1) You will be invited to an HR Screening with our IT Recruiter. 2) You will have a technical interview. 3) Decision. Submit your application online in one easy step! Apply now!

🏢 Summary: B2B Fullstack Engineer role focused on building and scaling secure applications to support genomic data science and AI-driven insights for disease research. The position involves developing React/Node.js and Python (FastAPI) solutions deployed on AWS, with strong emphasis on APIs, containerization, and production-grade systems. The project includes agentic AI systems and scalable cloud infrastructure. 🗂️ Requirements: Expertise in TypeScript and React, Expertise in Node.js, Expertise in Python and FastAPI, Experience with AWS services (CDK, ECS, ALB, EC2), Experience with Docker and containerization, Experience designing and securing APIs, Experience with SQL and NoSQL databases, Experience with logging, monitoring, and debugging production systems, Ability to work in Unix/Linux environments, Bash scripting skills, Experience with LangGraph or agentic AI systems, Fluent English (C1), Location in Poland 📃 Skills: TypeScript, JavaScript, React, Node.js, Python, FastAPI, AWS, CDK, ECS, ALB, EC2, Docker, SQL, PostgreSQL, NoSQL, Unix, Linux, Bash, LangGraph, CI/CD, CloudFormation, Lambda, Nginx, Flask, Playwright, Jest 🏢 Description: Holisticon Connect is a division within NEXER GROUP - a custom software development company. We started in Poland in 2017 and are now a team of over 140 people. We have the opportunity to work with world-renowned brands from Scandinavia, the UK, and Western Europe. Our goal is to grow stronger, in competence rather than in numbers.If you like what we do, check out our offer, maybe we will have the pleasure of meeting you! 😊 We are looking for a Fullstack Engineer to join a team that is expanding its genomic data science capabilities to explore data from multiple sources. The goal is to gain insights into the genomic drivers of common diseases and support the identification of novel therapeutic targets. We offer a B2B contract: 140 – 160 PLN net/hour + VAT You might be the perfect match if you are/have: ✅ Technical skills: Expertise in TypeScript (JavaScript) - React & Node.js; Expertise in Python (& FastAPI); Experience building and deploying secure and scalable apps in AWS (e.g., AWS CDK, ECS, ALB, EC2); Strong understanding of containerisation (+ deployment) - Docker ; Experience designing and securing APIs ; Experience with LangGraph and/or building agentic AI systems ; Strong knowledge of databases – SQL (PostgreSQL or similar) and NoSQL ; Experience logging, monitoring, and debugging production systems; Ability to work in Unix/Linux environments and with Bash scripting. ✅ Soft skills and others: Robust software development best practices and documentation; Proactive and self-driven, able to identify opportunities and suggest tasks rather than waiting for assignments; Strong team player , comfortable collaborating and contributing in group settings; Strong communication skills; Positive mindset and constructive approach to challenges; Initiative-taker who is not afraid to lead or push ideas forward and deliver in a fast-paced environment; Eager to learn, grow, and continuously develop new skills; Fluent English (C1) for effective collaboration in an international environment; Location in Poland (at least 5 years), enabling smooth cooperation and occasional in-person team meetings; Availability up to one month . Moreover, we appreciate skills in these areas: 5+ years of experience in a similar senior role; Strong product mindset; Familiarity with CI/CD pipelines; Familiarity with Domino Data Lab; AWS CloudFormation, CloudFormation, Lambda; Nginx; Other Python frameworks like Flask; Experience with testing frameworks/tools (e.g. Playwright, Jest); Interest in Life Sciences and Drug Discovery. By joining us, you gain the following: Opportunity to work on exciting, international projects in cutting-edge industries like Automotive, Biotech, IoT; Possibility to develop in cloud technologies; Becoming part of a team that believes that the next step to a promising future is to put your heart into it and make it happen; Respect for your private life so you don't have to work overtime or on weekends; Team Events budget to socialize outside of work; Company Events to celebrate smaller and bigger successes (Summer Party, Programmer's Day, and trips abroad – so far we've been in South Africa, Are, and Barcelona). Perks and benefits: Fully remote work or in our office in Wrocław; Benefits such as Luxmed , Multisport , and life insurance in Nationale Nederlanden ; Attractive referral system (9,5k for senior, 6k for mid, 2,5k for junior); Personal Training Budget with additional paid hours; Passion Day - an extra day off for your hobby to spend as you please; Flexible working hours with no micro-management approach. Our core hours are 9-15, the rest of the working time is up to you; We provide high-quality work equipment + 2 additional monitors and accessories. If you apply for this position and match our expectations, then: 1) You will be invited to an HR Screening with our IT Recruiter. 2) You will have a technical interview. 3) You will meet with a client. Submit your application online in one easy step! Apply now!

🏢 Summary: Fullstack Engineer role focused on building secure, scalable applications to support genomic data science and AI-driven insights for disease research and therapeutic target identification. The position involves developing and deploying cloud-based systems using modern TypeScript and Python stacks in AWS environments. B2B contract with fully remote work and collaboration in an international team. 🗂️ Requirements: Expertise in TypeScript and React, Expertise in Node.js, Expertise in Python and FastAPI, Experience building and deploying applications in AWS, Experience with containerization using Docker, Experience designing and securing APIs, Experience with SQL and NoSQL databases, Experience with logging, monitoring, and debugging production systems, Ability to work in Unix/Linux environments, Bash scripting skills, Fluent English (C1), Location in Poland 📃 Skills: TypeScript, JavaScript, React, Node.js, Python, FastAPI, AWS, CDK, ECS, ALB, EC2, Docker, SQL, PostgreSQL, NoSQL, LangGraph, Unix, Linux, Bash, CloudFormation, Lambda, Nginx, Flask, Playwright, Jest 🏢 Description: Holisticon Connect is a division within NEXER GROUP - a custom software development company. We started in Poland in 2017 and are now a team of over 140 people. We have the opportunity to work with world-renowned brands from Scandinavia, the UK, and Western Europe. Our goal is to grow stronger, in competence rather than in numbers. If you like what we do, check out our offer, maybe we will have the pleasure of meeting you! 😊 We are looking for a Fullstack Engineer to join a team that is expanding its genomic data science capabilities to explore data from multiple sources. The goal is to gain insights into the genomic drivers of common diseases and support the identification of novel therapeutic targets. We offer a B2B contract: 140 – 160 PLN net/hour + VAT You might be the perfect match if you are/have: ✅ Technical skills: Expertise in TypeScript (JavaScript) - React & Node.js; Expertise in Python (& FastAPI); Experience building and deploying secure and scalable apps in AWS (e.g., AWS CDK, ECS, ALB, EC2); Strong understanding of containerisation (+ deployment) - Docker ; Experience designing and securing APIs ; Experience with LangGraph and/or building agentic AI systems ; Strong knowledge of databases – SQL (PostgreSQL or similar) and NoSQL ; Experience logging, monitoring, and debugging production systems; Ability to work in Unix/Linux environments and with Bash scripting. ✅ Soft skills and others: Robust software development best practices and documentation; Proactive and self-driven, able to identify opportunities and suggest tasks rather than waiting for assignments; Strong team player , comfortable collaborating and contributing in group settings; Strong communication skills; Positive mindset and constructive approach to challenges; Initiative-taker who is not afraid to lead or push ideas forward and deliver in a fast-paced environment; Eager to learn, grow, and continuously develop new skills; Fluent English (C1) for effective collaboration in an international environment; Location in Poland (at least 5 years), enabling smooth cooperation and occasional in-person team meetings; Availability up to one month . Moreover, we appreciate skills in these areas: 5+ years of experience in a similar senior role; Strong product mindset; Familiarity with CI/CD pipelines; Familiarity with Domino Data Lab; AWS CloudFormation, CloudFormation, Lambda; Nginx; Other Python frameworks like Flask; Experience with testing frameworks/tools (e.g. Playwright, Jest); Interest in Life Sciences and Drug Discovery. By joining us, you gain the following: Opportunity to work on exciting, international projects in cutting-edge industries like Automotive, Biotech, IoT; Possibility to develop in cloud technologies; Becoming part of a team that believes that the next step to a promising future is to put your heart into it and make it happen; Respect for your private life so you don't have to work overtime or on weekends; Team Events budget to socialize outside of work; Company Events to celebrate smaller and bigger successes (Summer Party, Programmer's Day, and trips abroad – so far we've been in South Africa, Are, and Barcelona). Perks and benefits: Fully remote work or in our office in Wrocław; Benefits such as Luxmed , Multisport , and life insurance in Nationale Nederlanden ; Attractive referral system (9,5k for senior, 6k for mid, 2,5k for junior); Personal Training Budget with additional paid hours; Passion Day - an extra day off for your hobby to spend as you please; Flexible working hours with no micro-management approach. Our core hours are 9-15, the rest of the working time is up to you; We provide high-quality work equipment + 2 additional monitors and accessories. If you apply for this position and match our expectations, then: 1) You will be invited to an HR Screening with our IT Recruiter. 2) You will have a technical interview. 3) You will meet with a client. Submit your application online in one easy step! Apply now! You will earn: B2B: 140 – 160 PLN net/hour + VAT

🏢 Summary: Fullstack Engineer role focused on building secure, scalable applications to support genomic data science and AI-driven insights in healthcare. The position involves developing and deploying cloud-based solutions using modern TypeScript and Python stacks in AWS. B2B contract with competitive hourly rate and fully remote work option. 🗂️ Requirements: Expertise in TypeScript with React and Node.js, Expertise in Python with FastAPI, Experience building and deploying applications in AWS, Experience with AWS CDK, ECS, ALB, EC2, Strong knowledge of Docker and containerisation, Experience designing and securing APIs, Experience with LangGraph or agentic AI systems, Strong knowledge of SQL and NoSQL databases, Experience with PostgreSQL or similar databases, Experience logging, monitoring and debugging production systems, Ability to work in Unix/Linux environments, Bash scripting skills, Fluent English (C1), Location in Poland (min. 5 years), Availability up to one month 📃 Skills: TypeScript, React, Node.js, Python, FastAPI, AWS, CDK, ECS, ALB, EC2, Docker, SQL, PostgreSQL, NoSQL, LangGraph, Bash, Linux, Unix, REST, Monitoring, Logging, Debugging 🏢 Description: Holisticon Connect is a division within NEXER GROUP - a custom software development company. We started in Poland in 2017 and are now a team of over 140 people. We have the opportunity to work with world-renowned brands from Scandinavia, the UK, and Western Europe. Our goal is to grow stronger, in competence rather than in numbers. If you like what we do, check out our offer, maybe we will have the pleasure of meeting you! 😊 We are looking for a Fullstack Engineer to join a team that is expanding its genomic data science capabilities to explore data from multiple sources. The goal is to gain insights into the genomic drivers of common diseases and support the identification of novel therapeutic targets. We offer a B2B contract: 140 – 160 PLN net/hour + VAT You might be the perfect match if you are/have: ✅ Technical skills: Expertise in TypeScript (JavaScript) - React & Node.js; Expertise in Python (& FastAPI); Experience building and deploying secure and scalable apps in AWS (e.g., AWS CDK, ECS, ALB, EC2); Strong understanding of containerisation (+ deployment) - Docker ; Experience designing and securing APIs ; Experience with LangGraph and/or building agentic AI systems ; Strong knowledge of databases – SQL (PostgreSQL or similar) and NoSQL ; Experience logging, monitoring, and debugging production systems; Ability to work in Unix/Linux environments and with Bash scripting. ✅ Soft skills and others: Robust software development best practices and documentation; Proactive and self-driven, able to identify opportunities and suggest tasks rather than waiting for assignments; Strong team player , comfortable collaborating and contributing in group settings; Strong communication skills; Positive mindset and constructive approach to challenges; Initiative-taker who is not afraid to lead or push ideas forward and deliver in a fast-paced environment; Eager to learn, grow, and continuously develop new skills; Fluent English (C1) for effective collaboration in an international environment; Location in Poland (at least 5 years), enabling smooth cooperation and occasional in-person team meetings; Availability up to one month . Moreover, we appreciate skills in these areas: 5+ years of experience in a similar senior role; Strong product mindset; Familiarity with CI/CD pipelines; Familiarity with Domino Data Lab; AWS CloudFormation, CloudFormation, Lambda; Nginx; Other Python frameworks like Flask; Experience with testing frameworks/tools (e.g. Playwright, Jest); Interest in Life Sciences and Drug Discovery. By joining us, you gain the following: Opportunity to work on exciting, international projects in cutting-edge industries like Automotive, Biotech, IoT; Possibility to develop in cloud technologies; Becoming part of a team that believes that the next step to a promising future is to put your heart into it and make it happen; Respect for your private life so you don't have to work overtime or on weekends; Team Events budget to socialize outside of work; Company Events to celebrate smaller and bigger successes (Summer Party, Programmer's Day, and trips abroad – so far we've been in South Africa, Are, and Barcelona). Perks and benefits: Fully remote work or in our office in Wrocław; Benefits such as Luxmed , Multisport , and life insurance in Nationale Nederlanden ; Attractive referral system (9,5k for senior, 6k for mid, 2,5k for junior); Personal Training Budget with additional paid hours; Passion Day - an extra day off for your hobby to spend as you please; Flexible working hours with no micro-management approach. Our core hours are 9-15, the rest of the working time is up to you; We provide high-quality work equipment + 2 additional monitors and accessories. If you apply for this position and match our expectations, then: 1) You will be invited to an HR Screening with our IT Recruiter. 2) You will have a technical interview. 3) You will meet with a client. Submit your application online in one easy step! Apply now! You will earn: B2B: 140 – 160 PLN net/hour + VAT

🏢 Summary: Full-stack Developer role in an international product team building a scalable, data-driven platform supporting complex global decision-making processes. The position focuses on active product development with real ownership, combining Python-based backend and React frontend in a collaborative Agile environment. Requires daily overlap with US time zones. 🗂️ Requirements: 5+ years of experience as Fullstack Developer, Strong experience with Python, Experience with Django or Flask, Solid experience with React, Understanding of REST APIs, Knowledge of web application architecture, Experience with relational databases, Experience with PostgreSQL, Familiarity with Docker, Experience with CI/CD, Very good English, Availability for US time overlap (12:00–18:00 CET) 📃 Skills: Python, Django, Flask, React, REST, PostgreSQL, Docker, CI/CD, AWS, ECS, ECR, S3, TypeScript 🏢 Description: Holisticon Connect is a division within NEXER GROUP – a custom software development company. We started in Poland in 2017 and are now a team of over 140 people. We have the opportunity to work with world-renowned brands from Scandinavia, the UK, and Western Europe. Our goal is to grow stronger, in competence rather than in numbers. If you like what we do, check out our offer, maybe we will have the pleasure of meeting you! 😊 We are looking for a Full-stack Developer , who will join an international product-driven team working on a cutting-edge platform combining advanced data, scalable systems, and modern web technologies. The product supports complex decision-making processes and operates at a global scale. The team works in a highly collaborative environment with engineers and stakeholders based in the US and Europe. This is not a maintenance project – it’s active product development with real ownership and engineering influence. Because of the distributed setup, daily overlap with US time zones (12:00–18:00 CET) is required. We offer a competitive remuneration: B2B: 140 – 160 PLN net/hour + VAT Your responsibilities: Designing and developing fullstack web applications (backend + frontend); Building new features and improving existing functionalities; Writing clean, scalable, and testable code; Collaborating closely with Product, Design, and other Engineers; Participating in code reviews and technical discussions; Contributing to architecture decisions and continuous improvements; Working in an Agile/Scrum environment. You might be the perfect match if you are/have: 5+ years of experience as a Fullstack Developer; Strong experience with Python (Django or Flask preferred); Solid frontend experience with React; Good understanding of REST APIs and web application architecture; Experience with relational databases (PostgreSQL preferred); Familiarity with Docker and CI/CD practices; Very good English (daily communication with international team); Availability to work with required US overlap (12:00–18:00 CET). Moreover, we appreciate skills in these areas: Experience with AWS (ECS, ECR, S3 or similar services); Knowledge of TypeScript; Experience working in product-oriented teams; Exposure to data-heavy or performance-sensitive systems. By joining us, you gain the following: Opportunity to work on exciting, international projects in cutting-edge industries like Automotive, Biotech, IoT; Possibility to develop in cloud technologies; Becoming part of a team that believes that the next step to a promising future is to put your heart into it and make it happen; Respect for your private life, so you don't have to work overtime or on weekends; Team Events budget to socialize outside of work; Company Events to celebrate smaller and bigger successes (Summer Party, Programmer's Day, and trips abroad – so far we've been in South Africa, Are, and Barcelona). Perks and benefits: Fully remote work or in our office in Wrocław; Benefits such as Luxmed , Multisport , and life insurance in Nationale Nederlanden ; Attractive referral system (9,5k for senior, 6k for mid, 2,5k for junior); Personal Training Budget with additional paid hours; Passion Day - an extra day off for your hobby to spend as you please; Flexible working hours with no micro-management approach. Our core hours are 9-15, the rest of the working time is up to you; We provide high-quality work equipment + 2 additional monitors and accessories. If you apply for this position and match our expectations, then: 1) You will be invited to an HR Screening with our IT Recruiter. 2) You will have a technical interview. 3) You will meet with a client. Submit your application online in one easy step! Apply now!

🏢 Summary: Senior Fullstack Engineer role focused on building AI-driven pharmatech solutions using React and Python for a UK-based client. The position involves equal work on frontend and backend, contributing to feature design in a small, international Scrum-based team. The project leverages modern technologies to develop software supporting drug discovery in Life Sciences. 🗂️ Requirements: 5+ years experience as Fullstack Engineer in commercial projects, Strong experience with Python 3.x, Proficiency in JavaScript and TypeScript, Commercial experience with React, Experience with Django, DRF and Django ORM, Experience with relational databases (Postgres, Snowflake or Oracle), Experience working with cloud environments (GCP preferred), Fluent English (C1), Residence in Poland 📃 Skills: Python, Django, DRF, ORM, JavaScript, TypeScript, React, PostgreSQL, Snowflake, Oracle, GCP, CI/CD, FastAPI, Flask, Scrum 🏢 Description: Holisticon Connect is a division within NEXER GROUP - a custom software development company. We started in Poland in 2017 and are now a team of over 140 people with offices in Wrocław, Warsaw, and Cracow. We have the opportunity to work with world-renowned brands from Scandinavia, the UK, and Western Europe. Our goal is to grow stronger, in competence rather than in numbers. If you like what we do, check out our offer, maybe we will have the pleasure of meeting you! 😊 We are looking for Senior Fullstack Engineer with extensive experience in React and Python . Working on this position, you can expect that: Our client is a UK-based AI-driven Pharmatech . You will become a part of interesting industry, especially if you like things like Life Sciences/Medicine. You can work on software that can change the face of inventing new drags . You will work with modern technologies and the newest versions: React 18, TypeScript, Python 3.8+ and Django ; You will cooperate with very experienced engineers in an i nternational environment on daily basis; The team is small (4-6 p.) and uses some elements of Scrum to organise their way of working – generally there is not many meetings and you actually have time to do your work; You will work equally on the frontend and backend side; From the project level, you will have an influence on new features design and requirements. What do the Engineers working on the project say: “We participate in sprint level planning as well as quarterly and annual planning; as a developer, I feel I have a voice in the decisions made.”“In my opinion the best foreign team of the three I have worked for. As far as the people are concerned they are all very nice and cool”. Hey YOU clever one, if reading this add, you feel an instant need to dive into practical techniques that boost Python’s performance, read the article of engineer who actually works in the project of our client :) You will find it HERE We offer a choice of employment form: B2B or Employment Contract UoP: 20 000 – 22 000 PLN gross/month B2B: 150 – 170 PLN net/hour + VAT You might be the perfect match if you are/have: At least 5+ years working as a Fullstack Engineer in commercial projects; A real comfort working in the Python language (pref. 3.x); Proficiency in JavaScript/TypeScript and React ; Knowledge of Django (DRF and Django ORM); Hands-on experience with database technologies such as Postgres, Snowflake or Oracle; Eager to work with cloud environment (preferred GCP); Fluent English (C1) to work seamlessly in an international environment; Location in Poland to facilitate collaboration and attendance at occasional team meetings. Moreover, we appreciate skills in these areas: Many years' experience in a similar role Familiarity with CI/CD pipelines; Other Python frameworks like FastAPI, Flask; Interest in Life Sciences and Drug Discovery . By joining us, you gain the following: Opportunity to work on exciting, international projects in cutting-edge industries like Automotive, Biotech, IoT; Possibility to develop in cloud technologies; Becoming part of a team that believes that the next step to a promising future is to put your heart into it and make it happen; Respect for your private life so you don't have to work overtime or on weekends; Team Events budget to socialize outside of work; Company Events to celebrate smaller and bigger successes (Summer Party, Programmer's Day, and trips abroad – so far we've been in South Africa, Are, and Barcelona). Perks and benefits: Fully remote work or in our office in Wrocław; Benefits such as Luxmed , Multisport , and life insurance in Nationale Nederlanden ; Attractive referral system (9,5k for senior, 6k for mid, 2,5k for junior); Personal Training Budget with additional paid hours; Passion Day - an extra day off for your hobby to spend as you please; Flexible working hours with no micro-management approach. Our core hours are 9-15, the rest of the working time is up to you; We provide high-quality work equipment + 2 additional monitors and accessories. If you apply for this position and match our expectations, then: 1) You will be invited to talk with an IT Recruiter , to get more information about the project, and to ensure that we fulfil your expectations; 2) The next online meeting will be focused on technical verification; 3) The last stage is about getting to know you better. We will set up a short online meeting with a client. Submit your application online in one easy step! Apply now! You will earn: UoP: 20 000 – 22 000 PLN gross/month B2B: 150 – 170 PLN net/hour + VAT

🏢 Summary: The offer is for a Senior DevOps/MLOps Engineer to build, deploy, and scale production-ready machine learning pipelines for large-scale medical image analysis. The role focuses on transforming experimental ML workflows into robust, compliant, and scalable solutions within a regulated environment. You will collaborate with cross-functional teams to ensure high performance, reproducibility, and reliability of end-to-end ML systems. 🗂️ Requirements: 5+ years of experience in DevOps or MLOps, Experience building and deploying machine learning systems, Experience with ML frameworks (PyTorch, TensorFlow or JAX), Experience designing and maintaining data processing pipelines, Knowledge of full MLOps lifecycle, Advanced Python programming, Experience with Linux, Experience with Git-based workflows, Experience with CI/CD pipelines, Experience with Docker, Experience with Kubernetes, Experience with MLflow or Weights & Biases 📃 Skills: Python, PyTorch, TensorFlow, JAX, Linux, Git, CI/CD, Docker, Kubernetes, MLflow, Weights&Biases, Argo, Kubeflow, AWS, OpenCV, TypeScript, Node.js, JavaScript 🏢 Description: Holisticon Connect is a division within NEXER GROUP - a custom software development company. We started in Poland in 2017 and are now a team of over 140 people. We have the opportunity to work with world-renowned brands from Scandinavia, the UK, and Western Europe. Our goal is to grow stronger, in competence rather than in numbers. If you like what we do, check out our offer, maybe we will have the pleasure of meeting you! 😊 We are looking for a Senior DevOps/MLOps Engineer who will support the development and scaling of internal machine learning tooling for large-scale image analysis in the medical domain . In this role, you will work at the intersection of machine learning, data engineering, and DevOps , helping transform experimental ML workflows into robust, production-ready and compliant solutions . You will collaborate closely with data scientists, software engineers, and domain experts to build and maintain end-to-end ML pipelines , ensuring scalability, reproducibility, and high performance in a regulated environment. We offer a choice of employment form: B2B or Employment Contract UoP: 18 000 – 22 000 PLN gross/month B2B: 160 – 190 PLN net/hour + VAT You might be the perfect match if you are/have: At least 5 years of professional experience in DevOps, MLOps, or a similar role; Hands-on experience in building and deploying machine learning systems (excluding hosted LLM APIs), using frameworks such as PyTorch, TensorFlow, or JAX; Experience designing and maintaining data processing pipelines , ideally for image data (or similar domains, e.g. proteomics); Understand the full MLOps lifecycle : model training, validation, deployment, and monitoring; Excellent Python skills and write clean, well-tested, and maintainable code; Apply software engineering best practices (testing, code quality, documentation, performance); Solid experience with Linux environments , Git-based workflows , and CI/CD (e.g. GitHub Actions); Hands-on experience with containerization (Docker) and orchestration (Kubernetes); Have worked with MLOps tools such as MLflow or Weights & Biases. Moreover, we appreciate skills in these areas: Experience with workflow orchestration platforms (e.g. Argo Workflows, Kubeflow); Familiarity with cloud infrastructure , especially AWS; Experience with distributed systems or microservices architectures; Exposure to computer vision (e.g. OpenCV or similar); Basic knowledge of TypeScript / Node.js / JavaScript; Experience working in a regulated environment (e.g. healthcare, pharma, medtech). By joining us, you gain the following: Opportunity to work on exciting, international projects in cutting-edge industries like Automotive, Biotech, IoT; Possibility to develop in cloud technologies; Becoming part of a team that believes that the next step to a promising future is to put your heart into it and make it happen; Respect for your private life so you don't have to work overtime or on weekends; Team Events budget to socialize outside of work; Company Events to celebrate smaller and bigger successes (Summer Party, Programmer's Day, and trips abroad – so far we've been in South Africa, Are, and Barcelona). Perks and benefits: Fully remote work or in our office in Wrocław; Benefits such as Luxmed , Multisport , and life insurance in Nationale Nederlanden ; Attractive referral system (9,5k for senior, 6k for mid, 2,5k for junior); Personal Training Budget with additional paid hours; Passion Day - an extra day off for your hobby to spend as you please; Flexible working hours with no micro-management approach. Our core hours are 9-15, the rest of the working time is up to you; We provide high-quality work equipment + 2 additional monitors and accessories. If you apply for this position and match our expectations, then: Y ou will be invited for an HR screening to get to know your experience, expectations, and motivation; You will complete a coding test (HackerRank) to demonstrate your technical skills; You will be invited for a technical interview (~60 minutes) to discuss your approach, problem-solving, and frontend expertise in more depth; You will meet the team members to learn more about the project and see how we collaborate on a daily basis. Submit your application online in one easy step! Apply now! You will earn: UoP: 18 000 – 22 000 PLN gross/month B2B: 160 – 190 PLN net/hour + VAT