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Search for Senior Python Systems Developer for Functional Testing

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Toloka AI logo
Contract|$50/hr - $50/hr|Remote|Remote — Sweden

Please submit your CV in English and indicate your level of English proficiency.Mindrift connects specialists with project-based AI opportunities for leading tech companies, with a strong emphasis on testing, evaluating, and enhancing AI systems. Note: This is a project-based collaboration, not a permanent employment position.About the RoleWe are seeking a h…

May 2, 2026
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Toloka AI logo
Contract|$50/hr - $50/hr|Remote|Remote — Sweden

Please submit your CV in English and specify your English proficiency level. This is a freelance, project-based position with Toloka AI, connecting through the Mindrift platform. Assignments focus on testing, evaluating, and improving AI systems for technology companies. This role is not a permanent employment contract. Role overview The Senior Python Systems Developer - Functional Testing Expert works fully remotely from Sweden. The main focus is on large-scale codebases, reproducible Docker environments, and leveraging LLMs such as Roo Code and Claude Code to streamline both development and testing. Projects require hands-on work with functional testing, automation, and code quality improvement. What you will do Design and implement functional black box tests for codebases in multiple languages. Set up and maintain Docker environments to ensure reproducible builds and consistent testing across platforms. Monitor code coverage and configure automated scoring systems to meet industry standards. Use LLMs (Roo Code, Claude) to automate repetitive tasks, accelerate development, and improve code quality. Requirements Minimum 5 years as a Software Engineer, with deep experience in Python. Advanced skills with pytest, including fixtures, session-scoped tests, and timeouts. Strong background in black-box functional testing for CLI tools. Expertise in Docker: writing reproducible Dockerfiles, managing user contexts, and securing workspaces. Strong command of Linux and Bash scripting, including debugging inside containers. Familiarity with modern Python tools such as uv, pyproject.toml, and packaging. Ability to read and understand code in C, C++, Rust, and Go, using LLMs as needed. Experience using LLMs (Claude Code, Roo Code, Cursor) to speed up development and generate test cases. English proficiency at B2 level or above. Preferred qualifications Experience with agent evaluation platforms and MCP CLI. Tools and technologies Python (pytest, uv, Pillow), Docker, Bash, Git Submodules, C/C++/Rust/Go (reading), Dagger, GitHub Codespaces, LLMs (Claude Code, Roo Code, Cursor), coverage.py, gcov, kcov. Engagement and compensation Freelance, project-based work through Mindrift (powered by Toloka AI). Fully remote with flexible scheduling. Typical commitment is 20-30 hours per week. Compensation varies by project scope and expertise. AI trainers can earn up to $50 per hour.

Apr 24, 2026
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Magnet Forensics logo
Full-time|On-site|Gothenburg

Join Our Innovative Team!At Magnet Forensics, we are at the forefront of digital investigative technology, committed to empowering users through our cutting-edge software solutions. Our products are designed to acquire, analyze, and share vital evidence from a variety of devices, including computers, smartphones, tablets, and IoT devices. Our mission is to provide advanced tools that help protect businesses, communities, and nations by enhancing digital investigations. With a global clientele, our solutions are pivotal in modernizing how investigations are conducted, assisting law enforcement and security personnel in combating crime and safeguarding assets. As we continue to expand our international footprint, we are looking for talented individuals who are passionate about making a difference. Become a part of our dynamic and supportive environment where you can grow and thrive alongside a team of exceptional professionals. If you believe you align with our vision and are eager to contribute, we want to hear from you!Position OverviewAs a Senior Software Development Engineer in Test, you will take the lead in automating the testing processes for both our new and existing products. This role is instrumental in mentoring fellow team members, offering technical insight, and spearheading the development of internal engineering tools and quality frameworks. Collaborating closely with our development teams, you will ensure robust, reliable, and thorough testing practices by utilizing state-of-the-art technologies and industry best practices.

Feb 12, 2026
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Toloka AI logo
Contract|$50/hr - $50/hr|Remote|Remote — Sweden

Note: This is a freelance, project-based position via Mindrift (powered by Toloka AI), not a permanent role. Candidates must submit a CV in English and indicate their English proficiency level. Mindrift connects skilled professionals to project-based work in AI, supporting leading technology companies. Projects focus on testing, evaluating, and improving AI systems. Role overview Toloka AI is seeking a Senior Python Developer with expertise in code migration and functional testing. This remote position is open to candidates based in Sweden. The work involves handling large codebases across multiple programming languages, managing Docker environments, and using large language models (LLMs) to automate and streamline development tasks. What you will do Develop functional black box tests for codebases written in various languages Set up and maintain Docker environments to support consistent builds and test execution Track code coverage and implement automated scoring to align with industry standards Apply LLMs (such as Roo Code and Claude Code) to automate repetitive tasks, enhance code quality, and accelerate development cycles Requirements 5+ years of software engineering experience, with a strong focus on Python Advanced knowledge of pytest, including fixtures, session-scoped tests, and timeouts; experience designing black-box functional tests for CLI tools Expertise in Docker: writing reproducible Dockerfiles, managing user contexts, and maintaining secure workspaces Proficiency in Linux and Bash scripting, with the ability to debug within containers Familiarity with modern Python tools (uv, pyproject.toml, packaging) Ability to read and understand code in C, C++, Rust, and Go, with support from LLMs Experience using LLMs (Claude Code, Roo Code, Cursor) to speed up development and generate test cases English proficiency at B2 level or above Preferred qualifications Background with agent evaluation platforms Familiarity with MCP CLI Technologies used Python (pytest, uv, Pillow), Docker, Bash, Git Submodules, C/C++/Rust/Go (for reading code), Dagger, GitHub Codespaces, LLMs (Claude Code, Roo Code, Cursor), coverage.py, gcov, kcov. Benefits Project-based freelance work through Mindrift Fully remote and flexible: set your own hours (20-30 per week) Compensation varies by project and expertise; AI trainers can earn up to $50 per hour

Apr 24, 2026
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Toloka AI logo
Contract|$50/hr - $50/hr|Remote|Remote — Sweden

We kindly ask that you submit your CV in English and specify your level of English proficiency.Mindrift connects talented specialists with project-based AI opportunities for top-tier tech companies, focusing on evaluating, testing, and enhancing AI systems. Please note that participation is on a project basis, rather than permanent employment.About the RoleThis project is ideal for a Senior Python Developer with extensive experience in functional testing, strong skills in Linux and Docker, and the capability to interpret code in various languages with the assistance of LLMs (such as C, Rust, Go). You will be responsible for translating migration task requirements and confidently utilizing tools like Roo Code or Claude Code to enhance iterative development.Key ResponsibilitiesDevelop functional black box tests for large codebases across multiple source languages.Establish and manage Docker environments to guarantee fully reproducible builds and test executions across different platforms.Track code coverage and set up automated scoring criteria to meet industry benchmark standards.Utilize LLMs (Roo Code, Claude) to expedite development cycles, automate repetitive tasks, and enhance code quality overall.Requirements5+ years of experience as a Software Engineer, predominantly in Python.In-depth expertise with pytest (including fixtures, session-scoped, timeouts) and designing black-box functional tests for CLI tools.Proficient in Docker (creating reproducible Dockerfiles, user contexts, and secure workspaces).Strong skills in Linux and Bash scripting, along with confidence in debugging within containers.Familiarity with modern Python tools (uv, pyproject.toml, packaging).Ability to read and comprehend multiple programming languages with the support of LLMs (C, C++, Rust, Go, etc.).Experience utilizing LLMs (Claude Code, Roo Code, Cursor) to streamline development and generate test cases.English proficiency at B2 level or higher.Preferred QualificationsPrevious experience with agent evaluation platforms and MCP CLI.Tools and Technologies: Python (pytest, uv, Pillow), Docker, Bash, Git Submodules, C/C++/Rust/Go (reading), Dagger, GitHub Codespaces, LLMs (Claude Code, Roo Code, Cursor), coverage.py, gcov, kcov.BenefitsFreelance project-based collaboration through the Mindrift platform (powered by Toloka AI).Fully remote and flexible participation — you can choose your contribution hours (20-30 hours per week).Compensation for each project is determined by the scope and expertise required. For this project, AI trainers can earn up to $50 per hour.

May 2, 2026
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jobgether logo
Full-time|On-site|Sweden

jobgether is hiring a Senior Full-Stack Engineer based in Sweden. This position focuses on building and improving software using Python and React. The role centers on developing solutions that enhance how users interact with our products. What you will do Work on both backend and frontend projects using Python and React Collaborate with engineers and colleagues from other teams to deliver software Tackle complex technical challenges and contribute to key projects Requirements Professional experience with Python and React Ability to solve complex problems and deliver high-quality solutions Comfort working with cross-functional teams

Apr 29, 2026
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Sopra Steria logo
Full-time|On-site|Östersund

Sopra Steria is hiring a Java System Developer for the Östersund office. This position centers on building and maintaining software applications as part of a collaborative team. Role overview This role involves working on a range of software projects using Java. The team values new ideas and a strong interest in technology. Expect to contribute to the development of reliable and effective solutions for clients. What you will do Develop and maintain Java-based software applications Work closely with colleagues to solve technical challenges Participate in projects that require creative and analytical thinking Requirements Experience with Java development Interest in technology and software solutions Ability to work well in a team setting

Apr 29, 2026
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Sopra Steria logo
Full-time|On-site|Stockholm

Sopra Steria is looking for a Senior .NET System Developer to join the team in Stockholm. This position focuses on leading projects that use .NET technologies to build scalable software applications. Role overview As a senior developer, you will design and develop solutions that support both internal teams and client needs. Collaboration with colleagues from different disciplines is central to the role. Your technical decisions will help shape project outcomes and improve the quality of our software. What you will do Lead the development of applications using .NET technologies Work closely with cross-functional teams to deliver software solutions Contribute to the design and architecture of scalable systems Requirements Extensive experience with .NET development Strong background in designing and building scalable applications Comfort working in a collaborative, team-oriented setting

Apr 29, 2026
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Deloitte Nordic logo
Full-time|On-site|Stockholm

Are you a driven and solutions-focused NetSuite expert with extensive functional expertise in financial processes? Do you thrive on connecting Finance with IT and enjoy leading and mentoring teams?Join our Emerging ERP Solutions - Team NetSuite, where we empower clients to leverage their NetSuite solutions through in-depth advisory, implementation, and operational services. Collaborating closely with our clients, we help them realize their vision and develop sustainable capabilities by merging profound process knowledge with technical excellence.This position allows you to create a lasting impact for our clients while gaining exposure to some of the most intriguing and complex transformation initiatives in the Nordic region. Coupled with our structured coaching and mentoring framework, we encourage you to shape and lead your own professional development, fostering both personal and career growth.Your Role and ResponsibilitiesAs a Functional NetSuite Consultant, you will spearhead and contribute to dynamic advisory, implementation, and operational projects across the entire finance process spectrum. You will utilize your thorough understanding of NetSuite and enterprise finance processes to support, advise, and mentor clients and junior team members on their NetSuite journey. Your responsibilities will include:Process Design & Advisory: Leading clients through structured decision-making processes to design and refine their Record-to-Report (R2R), Procure-to-Pay (P2P), and Order-to-Cash (O2C) processes within NetSuite, ensuring alignment with their business strategy and transformation goals.Implementation Leadership: Managing or substantially contributing to all stages of NetSuite implementations, including discovery, requirement gathering, functional design and configuration, testing, training, and go-live support.Data Migration Expertise: Crafting and supervising data migration strategies and execution, guaranteeing data integrity, completeness, and compliance throughout the migration lifecycle.Project Management: Employing robust project management practices to deliver outcomes, overseeing timelines, scope, resources, and stakeholder expectations. Mentoring junior team members on best practices for project execution.Stakeholder Management: Engaging effectively with a diverse range of stakeholders—from C-level finance executives to operational teams—to gather requirements, manage expectations, and enhance the adoption of new processes and systems.Change Management: Assisting clients in navigating organizational change by developing training materials and ensuring a seamless transition to new NetSuite-enabled processes.Continuous Improvement: Evaluating clients’ existing NetSuite implementations, identifying areas for optimization, and recommending enhancements to improve efficiency and effectiveness.

Mar 3, 2026
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AFRY AB logo
Full-time|On-site|Gothenburg

As a System Developer, you will be a part of our division that provides services and consultancy in digitalization, artificial intelligence, design, and more. Through digitalization, we assist our clients in accelerating their transition towards a more sustainable society.Do you wish to collaborate with other talented colleagues who share your technical enthusiasm? At AFRY, you will have the opportunity to work at a company that prioritizes its employees and consistently strives to be at the forefront of technological innovation with a focus on sustainability.We offer extensive opportunities for those who have experience in system development and thrive in the dynamic role of a consultant. The project that suits you best will be determined based on your specific skills and knowledge.

Feb 17, 2026
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Sopra Steria logo
Full-time|On-site|Östersund

Join our dynamic team at Sopra Steria as a System Developer specializing in .Net technologies in Östersund. We are looking for innovative thinkers who are passionate about creating software solutions that make a difference. You will collaborate closely with cross-functional teams to develop, maintain, and enhance applications that drive our business objectives.

Mar 10, 2026
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Lovable logo
Full-time|On-site|Stockholm

Join Us as a Senior Financial Systems Engineer!At Lovable, we’re on the lookout for a skilled engineer to lead the development and management of our financial systems infrastructure. This infrastructure is vital as it supports our payment flows, usage metering, monetization, and billing processes.Why Choose Lovable?Lovable empowers individuals and teams of all sizes to create software using any programming language. From aspiring entrepreneurs to major corporations, millions leverage Lovable to turn innovative ideas into successful products swiftly. We’re pioneering a transformative era in software development, providing you with an extraordinary chance to influence the digital landscape. With over 2 million users across more than 200 countries, Lovable is making waves in business automation and idea realization, and this is just the beginning.Our compact, highly talented team is dedicated to forging a company that defines a generation from our base in Stockholm. We emphasize extreme ownership, rapid execution, and collaborative humility, seeking individuals who are passionate, fast-paced, and eager to make a significant impact.Why This Role is Crucial?As we expand our global reach, it’s essential that our financial systems evolve in tandem. We are establishing a dedicated Financial Systems Engineering team to manage everything that links product usage to revenue, including subscription billing, credit-based usage models, service billing, and new monetization infrastructures as we grow.This senior position offers substantial influence. You won’t just maintain existing systems; you’ll be re-engineering and re-architecting while we still have the agility to do it right, shaping the architecture that will support our journey through scaling for years ahead.

Feb 12, 2026
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Xenon7 logo
Full-time|Remote|Remote — Sweden

About UsAt Xenon7, we are where elite tech talent meets exceptional opportunities! We collaborate with leading enterprises and innovative startups to tackle exciting, cutting-edge projects using the latest technologies across various IT domains, including Data, Web, Infrastructure, AI, and more. Our expertise in IT solutions development and on-demand resources empowers us to partner with clients on transformative initiatives, driving innovation and significant business growth. Whether empowering global organizations or collaborating with pioneering startups, we are dedicated to delivering advanced and impactful solutions that address today's most complex challenges.Join us in building a community of top-tier experts! We are currently inviting exceptional AI & ML Professionals to solve real-world problems and help shape the future of intelligent systems.About the RoleWe are searching for a talented Node.js + Python Engineer with extensive experience in building backend services, APIs, automation, and data-driven features. You will collaborate with a distributed engineering team on a modern platform utilizing Node.js, Python, PostgreSQL, and cloud-native tools.Key ResponsibilitiesDevelop and maintain backend services using Node.js and Python.Design and optimize REST APIs, microservices, and backend workflows.Utilize PostgreSQL for schema design, queries, and performance tuning.Create automation scripts, integrations, and backend utilities.Collaborate with product, DevOps, and frontend teams to deliver features end-to-end.Produce clean, testable, and maintainable code following industry best practices.Diagnose production issues and enhance system reliability.Engage in code reviews, architecture discussions, and technical planning.Required Skills3–7+ years of backend engineering experienceProficient in Node.js (using frameworks like Express, Fastify, NestJS, etc.)Strong background in Python (including automation, APIs, scripts, services)Proven SQL skills and experience with PostgreSQL.Experience in microservices, API design, and distributed systems.Familiarity with Docker, CI/CD pipelines, and cloud environments (AWS/Azure/GCP).Solid understanding of authentication, authorization, and security best practices.Excellent debugging, problem-solving, and communication skills.Nice to HaveExperience with message queues (SQS, RabbitMQ, Kafka).Knowledge of Redis or caching strategies.Familiarity with serverless architectures (AWS Lambda).Experience with monitoring tools (CloudWatch, Prometheus).

Feb 11, 2026
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Deloitte logo
Full-time|On-site|Göteborg

Are you a driven and solution-focused NetSuite professional with extensive expertise in financial processes? Do you have a knack for connecting Finance with IT and thrive in leading and mentoring teams?Join our Emerging ERP Solutions - Team NetSuite, dedicated to helping clients unlock the full potential of their NetSuite systems through comprehensive advisory, implementation, and operational services. We collaborate closely with our clients to realize their vision and establish sustainable capabilities by merging deep process knowledge with technical proficiency.This role presents a chance to make a substantial impact for our clients while engaging with some of the Nordic region's most intriguing and complex transformation projects. Coupled with our structured coaching and mentoring framework, you will be encouraged to shape and steer your personal and professional growth.Your Role and ResponsibilitiesAs a Functional NetSuite Consultant, you will spearhead and contribute to dynamic advisory, implementation, and operational projects across the entire finance process spectrum. You will leverage your extensive knowledge of NetSuite and enterprise finance processes to support, advise, and mentor clients and junior team members along their NetSuite journey. Your responsibilities will encompass:Process Design & Advisory: Leading clients through structured decision-making to design and enhance their Record-to-Report (R2R), Procure-to-Pay (P2P), and Order-to-Cash (O2C) processes within NetSuite, aligned with their business strategies and transformation goals.Implementation Leadership: Overseeing or significantly contributing to all stages of NetSuite implementations—including requirement gathering, functional design, configuration, testing, training, and go-live support.Data Migration Expertise: Crafting and managing data migration strategies and execution, ensuring data integrity and compliance throughout the migration process.Project Management: Applying robust project management principles to deliverables, managing timelines, scope, resources, and stakeholder expectations while mentoring junior team members in project execution best practices.Stakeholder Management: Communicating effectively with a diverse range of stakeholders—from executive finance leaders to operational teams—to gather requirements, manage expectations, and promote the adoption of new processes and systems.Change Management: Assisting clients in navigating organizational change, creating training materials, and ensuring a seamless transition to new NetSuite-enabled processes.Continuous Improvement: Fostering a culture of continuous improvement by identifying opportunities for enhancing processes and systems.

Mar 3, 2026
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Sopra Steria logo
Full-time|On-site|Stockholm

Join our innovative team at Sopra Steria as a System Developer specializing in .NET technologies. In this role, you will collaborate with cross-functional teams to design, develop, and maintain high-quality software solutions that meet our clients' needs.

Mar 10, 2026
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Sopra Steria logo
Full-time|On-site|Stockholm

Sopra Steria is looking for a Java System Developer to join the team in Stockholm. This position centers on building and maintaining Java-based applications that support a range of business needs. Role overview As a Java System Developer, the work involves designing, developing, and maintaining applications. Collaboration with colleagues from different disciplines is a key part of the role, ensuring that software solutions meet high standards of quality and reliability. What you will do Design and implement Java applications Maintain and improve existing systems Work closely with cross-functional teams on project delivery Location This position is based in Stockholm.

Apr 29, 2026
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Sana logo
Full-time|On-site|Stockholm

Join Our Team at SanaSana is an innovative AI laboratory dedicated to creating superintelligent solutions for enhancing workplace productivity. We believe that organizations can achieve their goals more efficiently when teams access knowledge seamlessly, automate mundane tasks, and leverage the power of agentic AI for continuous learning. As a proud member of Workday, we are on a mission to develop AI that complements human capabilities rather than replacing them.Our vision is brought to life through our two flagship products. Sana Agents streamline access to your organization’s applications, knowledge, and data, allowing AI agents to perform meaningful work and enabling teams to process and act on information at an unparalleled scale. Sana Learn serves as an AI-driven learning platform, blending the ease of a modern educational tool with intelligent features like AI tutoring, automated content creation, and interactive applications, ensuring knowledge is not only accessible but also actionable.Our team is composed of highly skilled engineers and designers from top-tier companies such as Google, Spotify, Apple, and Databricks, all driven by a shared commitment to technical excellence and rapid iteration. Our tools currently empower over a million users to enhance their learning and work processes across hundreds of leading enterprises, and we are just getting started.About the RoleYou will play a pivotal role in developing and optimizing the core backend systems that support Sana’s Learn platform and search infrastructure. Your mission will be to redesign and scale these systems to efficiently handle enterprise-level workloads, eliminate bottlenecks, and evolve our architecture to meet the demands of the AI era.ResponsibilitiesTransform existing components to accommodate enterprise-scale workloads.Identify and address bottlenecks in storage, query performance, APIs, and data models.Lead the transition from outdated systems to sustainable, modern solutions.Enhance the reliability and efficiency of APIs.

Jan 3, 2026
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AFRY logo
Full-time|On-site|Åmål

Join AFRY Digital Solutions as a talented System Developer in Åmål, where you'll be at the forefront of innovative technology solutions. Collaborate with a dynamic team to design, develop, and implement cutting-edge systems that drive efficiency and improve user experience. Your expertise in software development will play a crucial role in transforming ideas into reality.

Apr 10, 2026
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Bosch Group logo
Full-time|On-site|Tranås

Join Bosch Group as a Testing and Development Engineer, where you will play a vital role in the innovation and improvement of heat pump appliances. In this position, you will be responsible for testing prototypes, analyzing performance data, and collaborating with cross-functional teams to enhance product quality and efficiency. Your expertise will contribute to sustainable solutions in the heating and cooling industry.

Apr 9, 2026
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Interikea Group logo
Full-time|On-site|Malmö

Interikea Group seeks a Test Leader for Infor M3 Food - Supply Chain Development based in Malmö. This position plays a key role in guiding testing processes for Infor M3 Food solutions, with a strong emphasis on quality throughout the supply chain development lifecycle. Role overview The Test Leader organizes and oversees testing activities for projects involving Infor M3 Food. The focus is on applying effective testing methodologies to ensure that supply chain development work meets high standards. This role also supports the efficiency and effectiveness of supply chain solutions. What you will do Lead and coordinate testing activities for Infor M3 Food projects Apply established testing methodologies within supply chain development Promote strong quality standards at every project phase Support improvements in supply chain solution efficiency and effectiveness Requirements Experience with software testing processes and methodologies Understanding of supply chain functions, particularly in the food sector Skill in coordinating project teams and driving quality outcomes

Apr 23, 2026

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