{"id":3948134,"url":"https://alion.io/job/devtalents-senior-javascript-developer-full-stack","title":"Senior JavaScript Developer (Full Stack)","company":{"id":4474048,"name":"Devtalents","domain":"devtalents.com","url":"https://alion.io/company/devtalents","size_band":"11-50","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Recruitee","truth_index":null},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":null,"work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Warsaw, Poland"],"countries":["PL"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":25000,"max":32000,"currency":"PLN","period":"month","gross":null,"usd_annual":97476},"salary_estimate":null,"experience_years_min":6,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"JavaScript","optional":false},{"name":"Nest.JS","optional":false},{"name":"Next.js","optional":false},{"name":"Node JS","optional":false},{"name":"React Native","optional":false},{"name":"Redux","optional":false},{"name":"Slack","optional":false},{"name":"TypeScript","optional":false},{"name":"AWS","optional":true},{"name":"Azure","optional":true},{"name":"Babel","optional":true},{"name":"CI/CD","optional":true},{"name":"Docker","optional":true},{"name":"Firebase","optional":true},{"name":"GCP","optional":true},{"name":"npm","optional":true},{"name":"React.js","optional":true},{"name":"SQL","optional":true},{"name":"Webpack","optional":true}],"status":"live","first_seen_at":"2024-12-16T13:25:11Z","employer_posted_date":"2024-12-16","last_verified_at":"2026-11-08T23:17:47Z","board_verified":true,"closed_at":null,"days_open":692,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":692},"description":"About us:\n\nWe are looking for a Senior JavaScript Developer to be a part of the DEVTALENTS team and contribute to the development of truly amazing solutions for businesses all over the world.\nJoining DEVTALENTS can be a life-changing decision for you, with endless benefits along the way. We provide top projects for which recruitment is not possible externally because of our wide range of partners. We value open and transparent communication, leveraging tools like Slack and generative AI to enhance collaboration and efficiency. We support continuous growth, encouraging you to step beyond your comfort zone and develop technically and personally. We are looking for an experienced Senior JavaScript Developer to join our team and provide technical leadership and mentorship.\nYour Role:\nMake strategic technical decisions ensuring scalability, security, performance, and adherence to best practices.\n\nDesign the architecture of front-end solutions using React.js or back-end solutions using Node.js.\n\nFocus on best practices regarding testing, security, monitoring, performance, and system reliability.\n\nAct as a mentor to mid-level and junior engineers through code reviews, presentations, workshops, and knowledge sharing.\n\nCollaborate with various teams and stakeholders, communicating technical concepts effectively to both technical and non-technical audiences.\n\nUse data, product insights, and user needs to drive decision-making, ensuring we deliver the best possible solutions.\n\nRequirements\nTechnical Experience and Skills:\nExpert proficiency in JavaScript/TypeScript (6+ years of commercial experience).\n\nDeep knowledge of React.js (front-end) or Node.js (back-end). Experience with Redux, Context API, Hooks, Express, NestJS, NextJS, or React Native is a plus.\n\nExperience working with databases (NoSQL: MongoDB, Firebase, and SQL).\n\nHands-on experience with CI/CD pipelines, npm/yarn, Webpack, and Babel.\n\nStrong AWS skills and familiarity with serverless architecture; GCP or Azure knowledge is a bonus.\n\nProven ability to design scalable, maintainable systems.\n\nStrong debugging, refactoring, and testing skills.\n\nExperience with Docker for containerizing applications and streamlining deployments.\n\nProficiency in integrating third-party APIs (e.g., payment gateways, social logins).\n\nHigher education with a profile in Computer Science or related\n\nEnglish level min. 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