Revenue Operations Engineer

🏢 Summary: Full-time remote Backend Engineer role focused on building and enhancing secure PHP-based APIs for an open-source cybersecurity product. The position involves developing new features, maintaining code quality, implementing tests, and ensuring high standards of security, performance, and data integrity. The engineer will work on cryptographic mechanisms, access control, and secure API workflows used at scale. 🗂️ Requirements: 3+ years experience building PHP applications, Proficiency in CakePHP, Laravel or Symfony, Experience with PHPUnit testing, Knowledge of OpenAPI specifications, Experience with Git and branching models, Understanding of OWASP Top 10 and secure coding practices, Proficiency in at least one additional language: JavaScript, Bash, Python, Go or Rust, Experience building and maintaining secure APIs, Ability to write unit and end-to-end tests, Experience with CI/CD pipelines 📃 Skills: PHP, CakePHP, Laravel, Symfony, PHPUnit, OpenAPI, Git, OWASP, JavaScript, Bash, Python, Go, Rust, CICD, APIs, GDPR 🏢 Description: 💰 Salary: 4000 - 4500 EUR, depending on experience 🕦 Full-time ☑️ EOR 🌴 Remote We are looking for a Backend Engineer  to join a fast-growing open-source cybersecurity company's engineering team. The role focuses on building and improving secure APIs, handling data integrity, access rights management, and cryptographic mechanisms while maintaining high standards of performance, quality, and security across all product editions. Requirements 3+ years of experience building PHP applications Proficient in building back-end applications with CakePHP, Laravel, or Symfony Proficient in testing applications with PHPUnit Familiar with OpenAPI Specifications Familiar with Git and branching models Strong understanding of OWASP Top 10 vulnerabilities and secure coding practices Proficient with at least one additional programming language: JavaScript, Bash, Python, Go, or Rust Fluent in English, both verbal and written Key Responsibilities Develop new features in PHP and CakePHP for existing products used daily by over half a million users Maintain, improve, and fix bugs on the existing codebase Transform functional specifications into reliable API workflows, ensuring backward compatibility and security Participate in code reviews to identify defects before launch Write unit tests aiming for 80% coverage to ensure functionality and prevent regressions Develop end-to-end tests to ensure critical user journeys function correctly across various scenarios Optimize code for performance and scalability to handle growth and increased demand Contribute to OpenAPI specifications, SDKs, and user and admin guides Collaborate closely with SRE teams to maintain robust CI/CD pipelines Apply secure coding and design practices to ensure all components adhere to the highest security standards Monitor project dependencies for vulnerabilities and assist the security team in analyzing their impact Ensure data handled by the product development team complies with GDPR and other data protection regulations Get to know DevsData: We are a technology consulting company and a recruitment agency, delivering software solutions to clients from Europe and the US. We work 100% remotely, in an international team, including people from Asia, London, or San Francisco. We employ people with experience in international corporations as well as students of the best technical and business universities. Find out more: https://devsdata.com/

🏢 Summary: Frontend Engineer role focused on building production-grade Next.js applications with real-time AI interactions, semantic search, and interactive knowledge graphs for enterprise-scale AI software products. The position involves working with React and TypeScript, contributing to design systems, optimizing frontend performance, and supporting accessibility and security requirements. Candidates will also use AI coding assistants in daily workflows and maintain high standards for code quality and test coverage. 🗂️ Requirements: 3-5 years frontend engineering experience, React, TypeScript, Next.js, SSR/SSG/CSR knowledge, State management, Real-time UI updates, AI/LLM interface experience, Semantic search interfaces, Frontend performance optimization, Core Web Vitals, Accessibility, Localization, Security practices, Cross-browser compatibility, AI coding assistants, Code review, Test coverage, Technical communication 📃 Skills: React, TypeScript, Next.js, SSR, SSG, CSR, LLM, AI, SemanticSearch, CoreWebVitals, Accessibility, Security, Localization, ReactFlow, Highcharts, MCP, DSPy, Node.js, Python, RAG 🏢 Description: Frontend Engineer (React) 💰 Salary: 5,000-7,000 USD per month 🌎 Hybrid, 1 day remote ☑️ Full-time 🕦 B2B We're looking for a Frontend Engineer for a leading enterprise AI software provider. You'll build production Next.js applications with real-time AI interactions, including streaming LLM responses, semantic search, and interactive knowledge graphs. You'll also contribute to the design system, handle enterprise requirements such as accessibility and security, and own post-launch performance. The team serves enterprise customers at scale, maintains SOC 2 compliance with HIPAA-ready security, and uses AI coding assistants daily in their development process. Requirements 3-5 years in frontend engineering, with solid React and modern TypeScript skills Hands-on Next.js production experience, having shipped SSR applications and understanding the trade-offs among SSR, SSG, and CSR Strong grasp of state management, including some exposure to real-time updates, optimistic UI, or multi-tenant data Prior work on AI/LLM interfaces, such as streaming responses, chat UIs, or semantic search Practical understanding of frontend performance, including Core Web Vitals and common optimization methods Some background in enterprise application needs: localization, accessibility, security practices A security-minded approach to development, with care around sensitive data and awareness of security implications Solid product and UX judgment, able to spot issues and propose fixes Regular use of AI coding assistants as part of daily workflow Ability to explain design and technical decisions clearly, both in writing and verbally Nice to Have Experience with React Flow, Highcharts, or similar data-visualization libraries Direct experience with vector search UIs, RAG interfaces, or semantic search systems Familiarity with MCP, DSPy, or other current AI frameworks, and experience building agentic AI interfaces Basic understanding of Node.js/Python backend concepts, enough to read backend code and participate in API design discussions Past contributions to design systems or open-source component libraries Responsibilities Design and deploy production-ready Next.js applications handling complex state and live AI interactions Develop interfaces for AI features, including streaming LLM output, semantic search, interactive knowledge graphs, and agentic builders Support and extend the component library and design system, ensuring reusability, accessibility, and consistency Handle enterprise-level requirements such as localization, accessibility, cross-browser compatibility, and security practices Take responsibility for shipped features after launch: track performance, reduce bundle size, and monitor Core Web Vitals Apply AI tools in daily work to increase speed, and contribute to improving internal frontend processes Uphold high standards for code quality and test coverage via careful code review

🏢 Summary: Senior Frontend Engineer role focused on building and scaling AI-powered Next.js applications with complex state management, real-time interactions, and enterprise-grade frontend architecture. The position involves owning frontend delivery, designing intuitive AI user experiences, and optimizing performance, accessibility, and scalability for high-load products. Hybrid full-time B2B engagement with a competitive salary range. 🗂️ Requirements: 5+ years of frontend engineering experience, 3+ years of React and TypeScript experience, Production experience with Next.js SSR applications, Knowledge of SSR, SSG, CSR trade-offs, Experience with complex state management, Experience building AI/LLM interfaces, Experience optimizing Core Web Vitals and frontend performance, Knowledge of localization, accessibility, security, and compliance, Security-conscious engineering approach, Experience using AI coding agents, Strong communication skills 📃 Skills: React, TypeScript, Next.js, SSR, SSG, CSR, JavaScript, LLM, AI, CoreWebVitals, Accessibility, Security, Localization, SemanticSearch, GraphQL 🏢 Description: Senior Frontend Engineer (React) 💰 Salary: $8000-$12,000 🕦 Full-time ☑️ B2B 🌴 Hybrid We are looking for a Senior Frontend Engineer to join a fast-growing AI product company's engineering team. The role sits at the crossroads of frontend architecture and product experience, owning both the delivery of business-critical Next.js applications and the design of intuitive, trustworthy user experiences for agentic AI products. Requirements Over 5 years of frontend engineering experience, including 3+ years specializing in React and modern TypeScript. Production Next.js experience: SSR applications at scale, app router, server components, and the trade-offs between SSR, SSG, and CSR. Complex state management for hard scenarios: real-time collaboration, optimistic updates, multi-tenant isolation, large-scale data sync. Experience building AI/LLM interfaces: streaming token responses, chat UIs, semantic search, or similar real-time AI interactions. High-load performance work: you monitor Core Web Vitals and know how to improve them under heavy traffic and large datasets. Enterprise application depth: localization, accessibility, security, and compliance, you understand the complexity beyond "making it work". A security-conscious approach to engineering: you handle sensitive data carefully and think about the security implications of what you ship. Strong craft and product instinct: you don't wait for perfect designs, you spot UX issues and propose solutions, and you're never satisfied with "good enough". AI-native working style. You already use AI coding agents daily and are eager to push the boundaries of harness engineering. Clear communication. You articulate design decisions and technical trade-offs clearly, verbally and in writing. Key Responsibilities Design and ship production Next.js SSR applications with complex state, high-load scenarios, and real-time AI interactions at scale. Build interfaces for AI-powered features: streaming LLM responses, semantic search across millions of documents, interactive knowledge graphs, and agentic builders. Architect component libraries and maintain the design system, ensuring reusability, accessibility, and consistent UX across the platform. Deliver enterprise-grade functionality: localization, accessibility compliance, cross-browser support, and security. Take full ownership after launch: monitor performance in production, optimize bundle sizes, instrument for Core Web Vitals, and ensure things scale gracefully. Keep the bar high on code quality, testing, and craft through thoughtful code review and mentorship.

🏢 Summary: Part-time, fully remote Senior Frontend Developer role focused on maintaining, optimizing, and incrementally improving a large, production-grade public website. The position centers on performance optimization, legacy code maintenance, and enhancing user-facing features within an existing WordPress-based system. The work emphasizes stability, speed, SEO best practices, and cross-browser compatibility rather than full rewrites. 🗂️ Requirements: Expert-level front-end development experience, Proven experience with long-lived or legacy codebases, Strong website performance optimization experience, Experience with web performance audits and tooling, Excellent knowledge of JavaScript, Excellent knowledge of HTML, Excellent knowledge of CSS, Understanding of responsive design principles, Basic understanding of SEO fundamentals and performance factors, Experience working with large frontend systems, Ability to work independently 📃 Skills: JavaScript, HTML, CSS, PHP, WordPress, CloudFlare, Lighthouse, GooglePageSpeed, SEO 🏢 Description: 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. Get to know DevsData: We are a technology consulting company and a recruitment agency, delivering software solutions to clients from Europe and the US. We work 100% remotely, in an international team, including people from Asia, London, or San Francisco. We employ people with experience in international corporations as well as students of the best technical and business universities. Find out more: https://devsdata.com/

🏢 Summary: Remote Senior Security DevOps Engineer role in a fintech company building a high-traffic digital trading and investment platform. The position focuses on securing cloud infrastructure, Kubernetes environments, and CI/CD pipelines while implementing strong IAM, network security, and Security as Code practices. This is a full-time B2B contract role with a competitive monthly salary. 🗂️ Requirements: 8+ years of experience in DevOps, Cloud Security, or Site Reliability Engineering, Experience with high-traffic or regulated environments, Strong knowledge of cloud identity systems and authentication protocols, Advanced knowledge of Kubernetes security and cluster hardening, Hands-on experience with Infrastructure as Code tools, Strong understanding of Linux security mechanisms, Knowledge of networking fundamentals (TCP/IP, DNS, TLS), Experience implementing security automation in CI/CD pipelines 📃 Skills: Kubernetes, Terraform, Ansible, Linux, TCP/IP, DNS, TLS, CI/CD, IAM, RBAC, ABAC, MFA, SSO, OIDC, SAML, PKI, SOC2, ISO27001 🏢 Description: Senior Security DevOps Engineer (100% remote) 💰 Salary: 7000-8000 USD/Month 💻 100% remote 🕦 Full-time ☑️ B2B We’re looking for a Senior Security DevOps Engineer to join a fast-growing fintech company that builds a digital trading and investment platform. Requirements: 8+ years of experience in DevOps, Cloud Security, Site Reliability Engineering, or similar roles. Experience working with high-traffic systems or regulated environments, such as financial platforms or other compliance-driven industries. Strong understanding of cloud identity systems and modern authentication protocols. Advanced knowledge of Kubernetes security, container orchestration, and cluster hardening. Hands-on experience with Infrastructure as Code tools such as Terraform or Ansible. Solid understanding of Linux security mechanisms and networking fundamentals, including TCP/IP, DNS, and TLS. Experience implementing security automation within CI/CD pipelines. Nice to Have: Experience supporting security or financial compliance frameworks (e.g., SOC 2, ISO 27001, or similar). Background in cryptography concepts, including encryption standards or PKI management. Experience with resilience or security testing approaches, such as controlled failure or attack simulations. Key Responsibilities: Design and maintain secure identity and access management (IAM) strategies across cloud infrastructure, Kubernetes clusters, and internal platforms using RBAC and ABAC models. Implement privileged access management solutions to enable secure, temporary access to production environments while eliminating long-lived credentials. Enforce strong authentication and identity policies, including MFA, SSO integrations, and modern identity standards such as OIDC and SAML. Secure containerized environments by implementing Kubernetes security best practices, including network policies, workload isolation, and secure container lifecycle management. Develop and maintain network security architecture, including segmentation strategies, firewall configurations, and protection mechanisms for high-throughput APIs. Manage the lifecycle of secrets and sensitive credentials, ensuring secure storage, rotation, and access control across environments. Integrate security scanning and testing tools into CI/CD pipelines to detect vulnerabilities during development and deployment stages. Integrate security monitoring with observability tools to detect anomalies, threats, or unauthorized access attempts in real time. Promote Security as Code practices by automating security policies, checks, and infrastructure configurations. Get to know DevsData: We are a technology consulting company and a recruitment agency, delivering software solutions to clients from Europe and the US. We work 100% remotely, in an international team, including people from Asia, London, or San Francisco. We employ people with experience in international corporations as well as students of the best technical and business universities. Find out more: https://devsdata.com/

🏢 Summary: Full-time Senior Back-End Engineer (Node.js) role focused on designing and maintaining scalable, high-performance server-side applications and APIs for modern, data-driven platforms. The position involves building RESTful services, integrating with third-party systems, ensuring code quality through testing, and optimizing system reliability and performance. Hybrid work model in Warsaw with B2B or CoE contract options. 🗂️ Requirements: Strong experience with Node.js, Strong experience with Express.js, Experience building and integrating APIs (GraphQL or REST), Knowledge of OAuth, JWT, and session-based authentication, Experience with MySQL, Experience with PostgreSQL, Experience writing unit tests with Chai and Mocha, Experience using Git and version control systems 📃 Skills: Node.js, Express.js, GraphQL, REST, OAuth, JWT, MySQL, PostgreSQL, Chai, Mocha, Git 🏢 Description: 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. Get to know DevsData: We are a technology consulting company and a recruitment agency, delivering software solutions to clients from Europe and the US. We work 100% remotely, in an international team, including people from Asia, London, or San Francisco. We employ people with experience in international corporations as well as students of the best technical and business universities. Find out more: https://devsdata.com/

🏢 Summary: Full-time Team Lead Software Engineer role focused on leading a full-stack team building high-performance web applications using React and Node.js. The position combines hands-on development with architectural ownership, mentoring, and delivery of scalable, AI-powered enterprise platforms. Work involves designing microservices, APIs, and cloud-based containerized deployments in a hybrid setup from Warsaw. 🗂️ Requirements: 7+ years full-stack experience with React.js and Node.js in production, 2+ years in Team Lead or senior engineering leadership role, Strong knowledge of React ecosystem (Redux, Hooks, component architecture, performance optimization), Proficiency in HTML5, CSS3, JavaScript ES6+, Experience with build tools (Webpack, Vite, or Babel), Experience with Express.js and RESTful API design, Knowledge of OAuth, JWT, session-based authentication, Experience with PostgreSQL or MySQL, Experience with MongoDB or other NoSQL databases, Hands-on experience with Docker, Familiarity with AWS or other major cloud platform, Experience with Git and Agile/Scrum methodologies 📃 Skills: React, Redux, JavaScript, HTML5, CSS3, Node.js, Express, REST, GraphQL, OAuth, JWT, PostgreSQL, MySQL, MongoDB, Docker, Kubernetes, AWS, Git, Webpack, Vite, Babel, Agile, Scrum 🏢 Description: 💰 Salary: 29,500–33,200 PLN/month 🌎 Hybrid from Warsaw, Poland 🕦 Full-time position, long-term ☑️ Contract of Employment We are looking for a Team Lead Software Engineer to join our client, a technology company that builds AI-powered platforms and consulting solutions for enterprise operations, with a strong focus on the private capital sector. The company has over ten years of experience working with high-growth and PE-backed businesses, combining deep domain expertise with advanced technology to drive measurable results. In this role, the focus will be on leading a team of developers across front-end and back-end development, owning architectural decisions, and contributing directly to the codebase. You will mentor engineers and drive the delivery of high-performance web applications using React and Node.js. Requirements 7+ years of full-stack development experience with React.js and Node.js in production environments 2+ years in a team lead, tech lead, or senior engineering leadership role Strong command of the React ecosystem: Redux, React Hooks, component architecture, and performance optimization Solid HTML5, CSS3, and modern JavaScript (ES6+); experience with build tooling such as Webpack, Vite, or Babel Proficiency with Express.js and API design (RESTful; GraphQL is a plus) Working knowledge of auth patterns: OAuth, JWT, session-based authentication Hands-on experience with PostgreSQL or MySQL; familiarity with MongoDB or similar NoSQL databases Docker experience required; Kubernetes is a plus Familiarity with at least one major cloud platform (AWS preferred) Comfortable with Git workflows and Agile/Scrum delivery Responsibilities Lead and mentor a team of software engineers; run code reviews, set engineering standards, and hold the bar on quality Architect and build full-stack features using React.js (with Redux and Hooks) on the front end and Node.js / Express.js on the back end Design scalable microservices and RESTful (or GraphQL) APIs aligned with product requirements Own the testing strategy: define coverage expectations, enforce unit and integration testing, and integrate quality gates into CI/CD pipelines Manage containerized deployments via Docker; collaborate on infrastructure with cloud platforms (AWS, Azure, or GCP) Partner directly with Product and Design to translate requirements into production-grade, accessible interfaces Model and maintain SQL and NoSQL data schemas; own data interaction patterns across services Monitor production systems, triage incidents, and drive root-cause resolution Keep technical documentation accurate and up to date Get to know DevsData We are a technology consulting company and a recruitment agency, delivering software solutions to clients from Europe and the US. We work 100% remotely, in an international team. We employ people with experience in international corporations as well as the ones from the best technical and business universities. Find out more: https://devsdata.com

🏢 Summary: Full-time remote engineering role focused on developing and scaling a SaaS platform that delivers digital identity records for physical products via QR codes. The position involves building and extending a Django-based backend, creating React/TypeScript front-end features, and designing data pipelines integrating external product systems. The engineer will also contribute to cloud infrastructure reliability and architectural decisions as the platform grows. 🗂️ Requirements: 5+ years of hands-on software engineering experience, Advanced Python and Django expertise, Strong TypeScript and React proficiency, Experience with REST APIs and webhooks, Experience processing JSON, XML, CSV data formats, Experience with Google Cloud Platform or AWS or Azure, Experience using AI-assisted development tools (e.g., Claude, GitHub Copilot), Advanced English proficiency 📃 Skills: Python, Django, TypeScript, React, Tailwind, REST, Webhooks, JSON, XML, CSV, GCP, AWS, Azure, Claude, Copilot 🏢 Description: 💰 Salary: 19 100 - 23 400 PLN per month 🌎 100% remote 🕦 Full-time position, long-term ☑️ B2B Contract The company operates a SaaS platform that lets brands create and administer digital identity records for their physical goods. Shoppers reach these records by scanning QR codes on items such as apparel or footwear, landing in branded interfaces that surface sustainability data, maintenance guidance, after-sales support, and secondary market options. The product ingests existing product data from brand clients and makes it consumable at scale. Requirements: At least 5+ years of hands-on engineering experience, combined with solid product thinking Advanced Python capability, since Django carries most of the platform's business logic Confident working knowledge of TypeScript, React, and Tailwind CSS Practical background integrating REST endpoints and webhooks, plus experience parsing inconsistent production data in formats such as JSON, XML, and CSV Direct exposure to Google Cloud Platform, or transferable depth in AWS or Azure Daily use of AI-assisted development tools such as Claude or GitHub Copilot as part of standard workflow Advanced spoken and written English Nice to Have: Prior work with enterprise resource planning or product information management systems, for instance SAP, Akeneo, or inRiver Exposure to GS1 specifications or other supply chain data interchange formats Key Responsibilities: Extend and refine the Django-based Python backend through new API endpoint development, data model changes, background job processing, and performance tuning Build and maintain the APIs that power the Passport Builder product Deliver user-facing functionality written in TypeScript and React within the Passport Builder and the administrative tools used by brand teams Take responsibility for uptime and monitoring on GCP infrastructure, spotting anomalies ahead of customer-reported incidents Contribute to technical direction and shape architectural choices as the platform expands across additional clients, larger product catalogs, and new geographic regions Architect and implement data pipelines that move ERP, PLM, and PIM records from client systems into the platform during new brand onboarding Get to know DevsData: We are a technology consulting company and a recruitment agency, delivering software solutions to clients from Europe and the US. We work 100% remotely, in an international team, including people from Asia, London, or San Francisco. We employ people with experience in international corporations as well as students of the best technical and business universities. Find out more: https://devsdata.com/

🏢 Summary: Full-time, 100% remote Senior Frontend Developer role focused on building and scaling complex, responsive web applications powered by AI-driven platforms. The position involves architecting high-quality front-end solutions, integrating with back-end services, and ensuring performance, scalability, and cross-browser compatibility. The role also includes driving best practices, code quality, and modern front-end standards within the team. 🗂️ Requirements: Strong knowledge of HTML5, CSS3, JavaScript (ES6), Strong understanding of DOM, Experience with React.js, Experience with Material UI, Experience with Responsive Design and cross-browser compatibility, Familiarity with SASS or LESS, Understanding of BEM methodology, Knowledge of CSS-in-JS, Knowledge of browser storage (cookies, localStorage, sessionStorage), Proficiency with npm or yarn, Experience with Jest or equivalent testing frameworks, Understanding of SEO best practices, Familiarity with TypeScript, Knowledge of SSR and service workers, Experience with Webpack, Vite, or Rollup, Understanding of browser extensions integration 📃 Skills: HTML5, CSS3, JavaScript, ES6, DOM, React, MaterialUI, SASS, LESS, BEM, CSS-in-JS, cookies, localStorage, sessionStorage, npm, yarn, Jest, TypeScript, SSR, Webpack, Vite, Rollup, SEO, ServiceWorkers 🏢 Description: Senior Frontend Developer (100% remote) 💰 Salary: 20,000-23,000 PLN/month 🌎 100% Remote 🕦 Full-time position ☑️ B2B or Contract of Employment We are looking for a Senior Frontend Developer for a partner client that helps businesses use artificial intelligence to run more efficiently and grow faster. The company builds and provides digital platforms and consulting services that enable organizations to manage operations, analyze data, and improve performance. Their solutions combine AI, automation, and deep business expertise to help clients simplify workflows, gain insights, and deliver greater value. Requirements: HTML5 , CSS3 , JavaScript (ES6) Strong understanding of the Document Object Model (DOM) Skilled in Responsive Design and cross-browser compatibility Experience with React.js and Material UI Familiarity with CSS preprocessors such as SASS or LESS Understanding of BEM methodology and CSS-in-JS approaches Knowledge of browser storage mechanisms (cookies, localStorage, sessionStorage) Proficient in using package managers (npm/yarn) Experience in unit testing using Jest or equivalent frameworks Understanding of SEO best practices Familiarity with TypeScript for type-safe, large-scale applications Knowledge of server-side rendering (SSR) and service workers Experience with code bundling and modern module bundlers (e.g., Webpack, Vite, Rollup) Understanding of browser extensions and their integration with web applications Responsibilities: Develop and maintain  complex, responsive user interfaces for large-scale web applications. Architect and integrate front-end components with back-end APIs and services , ensuring security, scalability, and performance. Drive the implementation of pixel-perfect UI/UX designs across browsers and devices. Provide technical mentorship to junior developers and guide the team in adopting modern best practices. Conduct code reviews , enforce standards, and maintain a clean, modular codebase. Evaluate and recommend new frameworks, tools, and libraries to enhance productivity. Manage project timelines, estimate development efforts, and collaborate effectively with cross-functional teams. Maintain comprehensive front-end documentation , design patterns, and style guides. Stay updated with industry trends , emerging technologies, and front-end innovations to continuously improve team capabilities. Participate in architectural discussions , ensuring long-term scalability and maintainability of the front-end ecosystem. Get to know DevsData We are a technology consulting company and a recruitment agency, delivering software solutions to clients from Europe and the US. We work 100% remotely, in an international team, including people from Asia, London, or San Francisco. We employ people with experience in international corporations as well as students of the best technical and business universities. Find out more: https://devsdata.com

🏢 Summary: Senior Data-oriented SRE to design, build and operate a scalable data platform and core infrastructure for large-scale data processing in a cloud environment. The role focuses on developing distributed systems, ETL frameworks and production-grade services rather than individual pipelines. Long-term B2B contract, fully remote with NYC time zone overlap. 🗂️ Requirements: Senior experience in Data Platform Engineering or SRE, Strong software engineering skills with Python, Experience building ETL and stream processing frameworks, Hands-on experience with Kafka, Spark or Flink, Strong SQL knowledge and experience with relational or analytical databases, Production experience with AWS or GCP, Experience with Kubernetes and Linux in production, Experience managing large-scale distributed systems, Strong DevOps and automation skills 📃 Skills: Python, AWS, GCP, Kafka, Spark, Flink, Airflow, Prefect, SQL, MySQL, PostgreSQL, SQLServer, Snowflake, Redshift, Presto, Kubernetes, Linux, S3, GCS, EC2, GCE, IAM, Docker, ETL, DevOps 🏢 Description: 📍 Work mode: 100% Remote in NYC time zone (at least 5/6 hours of overlap with NYC) 🕒 Contract type: B2B 💼 Experience level: Senior 💰 Rate: 40-65 $ net + VAT / hour ⏳ Start date: ideally ASAP 📆 Project length: Long-term cooperation About the role: We are looking for a Data-oriented SRE to help build and operate the core infrastructure that powers our data ecosystem. This role focuses on building tools, services and frameworks for data engineers and data scientists , rather than developing individual ETL pipelines. You will work on the platform layer of the data stack , designing and maintaining distributed systems, data processing frameworks and the infrastructure that enables large-scale data processing. Job responsibilities: Build and run data platform using such technologies as public cloud infrastructure (AWS and GCP), Kafka, Spark, databases and containers Develop data platform based on open source software and Cloud services Build and run ETL tools and frameworks to onboard data into the platform, define schema, build DAG processing pipelines and monitor data quality. Help develop machine learning development framework and pipelines Manage and run mission crucial production services. Skills: Experience as Data Platform Engineering or SRE Strong software engineering experience and working with Python. Experience building ETL and stream processing tools and frameworks using Kafka, Spark, Flink, Airflow/Prefect, etc. Strong experience working with SQL and databases/engines such as MySQL, PostgreSQL, SQL Server, Snowflake, Redshift, Presto, etc. Experience with using AWS/GCP (S3/GCS, EC2/GCE, IAM, etc.), Kubernetes and Linux in production. Strong proclivity for automation and DevOps practices Experience with managing increasing data volume, velocity and variety Agile, self-starter and is focused on getting things done. Strong communicator Nice to have: Familiarity with data science stack: e.g. Jupyter, Pandas, Scikit-learn, Dask, Pytorch, MLFlow, Kubeflow, etc. Financial Services experience