Fitsoftware

Senior Frontend Developer (Part-time; 100% remote) 

• Salary: up to around $40 per hour
• 100% Remote
• Part-time: Around 10h per week, up to 10-15h/week, as needed
• B2B contract/freelance

We are seeking a Senior Front-End Developer to work on the ongoing improvement, maintenance, and optimization of our extensive public-facing website. The role is focused on working with an existing, production-grade codebase built primarily with HTML, CSS, JavaScript, PHP and WordPress, under CloudFlare.

Requirements

• Expert-level experience in front-end development, with a strong track record of working on long-lived or legacy codebases
• Website performance optimization experience, web performance tooling and audits (e.g., Lighthouse, Google PageSpeed insights) experience.
• Ability to work independently (along with a work history of independent work)
• Excellent knowledge of JavaScript, HTML and CSS, with a clear understanding of responsive design principles
• Basic understanding of SEO fundamentals, including performance factors, and search-engine-friendly markup
• Experience working with extensive and legacy frontend systems
• Strong attention to detail and a quality-focused mindset

Main Responsibilities

• Optimize page load times and overall website performance using front-end techniques.
• Working on bugfixes and optimization of a legacy front-end website built with JavaScript, HTML, CSS, and WordPress, ensuring performance, and stability.
• Improve existing features and user-facing functionality through thoughtful, incremental enhancements rather than full rewrites.
• Collaborate with internal developers, designers, management, and content teams to implement updates and refinements to existing pages and components.
• Ensure cross-browser compatibility across the website.
• Apply front-end SEO best practices, including performance optimization (most importantly), accessibility improvements, page structure, and Core Web Vitals.

Project Manager (Part-time; 100% remote)

• Salary: up to around $18-20 per hour
• 100% Remote
• Part-time: 20-25h per week 
• B2B Contract/freelance

We are seeking a Project Manager to take ownership of cross-functional technical and content-driven initiatives. This role requires close collaboration with the CEO, technical and marketing team, as well as a high level of autonomy, practical problem-solving, and comfort operating in a fast-moving, evolving environment. 

Requirements

• 3+ years of experience in Project Management, Technical Project Management, or a similar role
• Proven experience working in a startup, or agency, or fast-paced, high-ownership environment
• Strong ability to work independently, take end-to-end ownership of initiatives, and drive execution with minimal supervision.
• Strong communication and organizational skills
• Experience managing and collaborating with technical teams, including task assignment, progress tracking, and delivery oversight
• Solid technical background/experience, including web technologies, infrastructure, or internal tooling
• Working knowledge of scripting or automation to improve efficiency and operational reliability
• Daily availability of at least 4h per day everyday
• Experience with Git-based workflows for version control and team collaboration
• Strong organizational, prioritization, and problem-solving skills, with a proactive and solution-oriented mindset

Main Responsibilities

• Work closely with the CEO to plan, prioritize, and deliver company-wide technical and operational initiatives
• Lead and coordinate technical and content teams, collaborating with them on project planning, execution, and delivery
• Assign tasks, track progress, and provide ongoing guidance and support to ensure high-quality and timely outcomes
• Organize tasks, track progress & milestones, and support reporting
• Acting as a central point of coordination for technical execution
• Improve, maintain, and standardize company-wide technical documentation

Senior Back-End Engineer (Node.js)

• Salary: 18,700-20,900 PLN/Month
• Warsaw, Poland (Hybrid - 3 days in office, 2 days remote)
• Full-time
• B2B or CoE

We’re looking for a Senior Back-End Engineer to join a fast-growing international tech company focused on building modern, data-driven platforms that power digital transformation in the financial and enterprise sectors.

Requirements:

• Strong experience in building server-side applications using Node.js and Express.js.
• Hands-on experience with API development and integration, particularly with GraphQL or RESTful services.
• Strong knowledge of authentication and authorization mechanisms (OAuth, JWT, session-based).
• Strong experience with databases such as MySQL and  PostgreSQL.
• Experience writing unit tests with tools such as Chai and Mocha.
• Strong experience using Git and version control systems.
• Proficiency in English (both written and spoken).

Nice To have:

• Bachelor’s degree in Computer Science or a related field.
• Experience with cloud platforms (AWS, Azure, or GCP), as well as containerization and orchestration tools such as Docker and Kubernetes.
• Experience with microservices architecture.
• Experience setting up CI for static analysis and test execution.
• Experience developing RAG applications and storing data in vector embeddings.

Key Responsibilities:

• Design, build, and maintain scalable, high-performance server-side applications and RESTful APIs using Node.js and Express.js.
• Guide and supervise the development of key code components to ensure long-term reliability and scalability.
• Integrate with front-end components and third-party services.
• Actively review the codebase, recommending and implementing refinements where needed.
• Write unit and integration tests and optimize performance to ensure high-quality code.
• Collaborate closely with cross-functional teams to define and implement technical solutions.
• Improve system performance, reliability, and long-term maintainability through optimization and best practices.

Senior Full Stack Developer (Node.js + React)

• Salary: 23,000-24,800 PLN/Month
• Warsaw, Poland (Hybrid - 3 days in office, 2 days remote)
• Full-time
• B2B or CoE

We’re looking for a Senior Full-Stack Developer to join a fast-growing international tech company focused on building modern, data-driven platforms that power digital transformation in the financial and enterprise sectors.

Requirements:

• 5+ years of experience as a Senior Full Stack Developer with significant expertise in Node.js and React.
• Strong experience in building server-side applications using Node.js and Express.js.
• Hands-on experience with API development and integration, particularly with GraphQL or RESTful services.
• Strong knowledge of authentication and authorization mechanisms (OAuth, JWT, session-based).
• Front-end proficiency in React.js, Redux, HTML5, CSS3, and modern JavaScript (ES6+).
• Familiarity with front-end build tools such as Vite, Webpack, and Babel.
• Strong experience with databases such as MySQL and  PostgreSQL.
• Experience with cloud platforms (AWS, Azure, or GCP), as well as containerization and orchestration tools such as Docker and Kubernetes.
• Strong experience using Git and version control systems.
• Proficiency in English (both written and spoken).

Key Responsibilities:

• Design, build, and maintain scalable, high-performance server-side applications and RESTful APIs using Node.js and Express.js.
• Develop and maintain interactive, responsive user interfaces using React.js, Redux, and modern JavaScript (ES6+).
• Lead the design and implementation of scalable architectures and microservices.
• Work closely with database engineers to design efficient schemas and manage data interactions using SQL databases or MongoDB.
• Ensure reliable deployments and smooth release of updates using CI/CD pipelines and Docker.
• Write unit and integration tests and optimize performance to ensure high-quality code.
• Collaborate closely with cross-functional teams to define and implement technical solutions.
• Improve system performance, reliability, and long-term maintainability through optimization and best practices.

Senior Backend Developer (Python/Django; 100% remote)

• Salary: 23,400-25,500 PLN/month 
• 100% Remote
• Full-time position
• B2B or Contract of Employment 

We are looking for a Senior Backend Developer for a partner client with a compelling mission: they act as a product and technology partner for early-stage B2B SaaS founders, helping them navigate the crucial journey from launch to their first million in revenue. They essentially become the dedicated tech backbone for these startups.

Requirements:

• 5+ years of professional backend development experience.
• Extensive, proven experience with Python and the Django framework.
• Proficient in data modelling, relational and non-relational databases, and complex SQL queries.
• Strong experience with API design, integrations, and distributed systems (synchronous & asynchronous communication).
• Hands-on experience with Docker, Redis, message brokers, and cron jobs.
• Expertise in writing unit tests (e.g., Pytest) and a commitment to code quality and testing best practices.
• Great understanding of English with strong communication and collaboration skills.

Nice to have:

• Previous experience in Greentech or Ecotech is a significant plus.
• Experience as an unofficial tech lead or mentoring junior developers.
• Knowledge of additional testing methodologies (integration, end-to-end).

Responsibilities:

• Lead the design and development of complex server-side applications, APIs, and databases, taking ownership of architectural decisions.
• Architect, write, and deliver high-quality, scalable, and efficient code using Python and Django.
• Collaborate closely with cross-functional teams, including front-end developers and the tech lead, to align backend development with project goals.
• Architect and implement advanced user authentication, authorisation, and security mechanisms.
• Conduct performance analysis and optimisation, identifying bottlenecks and implementing solutions.
• Drive the implementation of automated testing and CI/CD processes to ensure code reliability.
• Establish and enforce coding standards, conduct thorough code reviews, and document backend architecture and APIs.
• Take responsibility for system reliability, scalability, and security, ensuring best practices.

Web Scraping Specialist (100% remote)

• Salary: 6,000 - 15,000$ per month
• Full-time
• Contract signed through EOR
• 100% Remote
  
   

We’re looking for a Web Scraping Specialist to join a focused team. Your role will involve leading data-gathering initiatives, refining collection methodologies, and analyzing results. The ideal candidate will help us advance our mission to reshape how publicly available online information is accessed and utilized.

Requirements

• Independently capable of collecting data from sophisticated and dynamic web interfaces, with a proven track record shown through previous work samples.
• Strong programming skills in Python and JavaScript, with extensive experience using common data extraction toolkits and browser automation frameworks.
• Understanding of concurrent execution models (async/threading) and strategies for scalable, distributed data collection.
• Solid foundation in core web technologies: HTML structure, CSS selectors, client-side JavaScript, and DOM manipulation.
• Hands-on experience with schema-flexible databases (e.g., MongoDB) for designing optimal data storage and ensuring consistency.
• Experience applying ML techniques for tasks like data normalization, classification, or forecasting.
• Familiarity with major cloud platforms (AWS, GCP, Azure) for deploying and orchestrating large-scale data collection tasks.
• A demonstrated contribution to community-driven projects in the domains of data acquisition or processing is a plus.

Key Responsibilities

• Script Development: Build, debug, and enhance reliable code to systematically collect data from the web.
• Complex Navigation: Solve technical challenges like pagination and AJAX/JavaScript-driven content loading during data retrieval.
• Data Processing: Clean, validate, and structure raw data into usable formats.
• Storage & Management: Implement and optimize database solutions for storing large volumes of collected data.
• System Maintenance: Monitor automated processes, perform root-cause analysis on failures, and ensure pipeline health.

Embedded Systems Engineer (100% remote)

• Salary: 15,000 - 25,000$ per month
• Full-time
• Contract sign through EOR
• 100% Remote

We’re looking for an Embedded Systems Engineer to join a company that specializes in building the core infrastructure behind large-scale, distributed web data systems. In this role, you’ll work close to the hardware and networking layer, designing and optimizing high-performance, reliable systems that enable massive data collection and processing. You’ll collaborate with a lean, highly technical team, move fast, and take ownership of critical components used at a global scale to support next-generation AI model training.

Requirements

• Experience with C, Go, JavaScript, and embedded system tools and libraries
• At least 5 years of software development experience, writing reliable and maintainable code
• Experience designing and building large, scalable systems
• Experience with low-level programming, embedded systems, or firmware for devices connected to a network
• Ability to identify and fix problems in complex, live software systems
• Familiarity with modern development practices like version control, automated testing, and CI/CD pipelines
• Professional or native-level English proficiency

Key Responsibilities

• Build and improve features across both backend systems and device firmware
• Test, deploy, and troubleshoot backend APIs and firmware services
• Write well-documented, tested, and maintainable code for applications and embedded systems
• Participate in designing, reviewing, and documenting technical solutions and code
• Contribute to the company’s infrastructure, including mobile, desktop, embedded, and server-side applications