10/14/2026 updated
100 % available
Senior Software Engineer | React, TypeScript, Next.js, Node.js
Bosnia-Herzegovina
Only remote
Bachelor's Degree in Software EngineeringAd ManagementGoogle AdSenseNode.jsAWS CLINext.jsTypeScriptAWS CDKTailwindReact.jsExpress.jsBackendFull Stack DevelopmentAWS FargateReact NativeFront End Software Development
React & TypeScript Development
Expertise in building scalable web and mobile applications using React, React Native, TypeScript, and Next.js, including SSR, Styled Components, and Tailwind CSS across real estate, fintech, e-commerce, and SaaS domains.
Frontend Architecture & Technical Leadership
Strong background in designing and leading frontend architectures across multiple repositories and international teams, including code reviews, mentoring engineers, and coordinating production releases.
Backend & API Integration
Solid experience with Node.js, Fastify, Express.js, REST APIs, MongoDB, and MySQL, enabling full-stack delivery and seamless integration between frontend applications and backend systems.
State Management
Proficiency in Redux, Redux Toolkit, React Query, and Axios for managing complex application state and asynchronous data flows.
Testing & Quality Assurance
Hands-on experience with Jest, Cypress, Playwright, BDD, and automated testing strategies to ensure production reliability and end-to-end coverage.
Cloud & CI/CD
Practical knowledge of AWS, Docker, CircleCI, and GitHub Actions for continuous integration, delivery, and cloud-based deployments.
Ad Tech & Monitoring
Experience with Google Ad Manager (GAM), Google Publisher Tag (GPT), Single Request Architecture (SRA), CMP, and Datadog for advertising infrastructure and production monitoring.
Tooling & Collaboration
Familiarity with Git, Figma, Storybook, AVIV Gemini Design System, Agile, and Scrum methodologies for efficient team collaboration and product delivery.
Expertise in building scalable web and mobile applications using React, React Native, TypeScript, and Next.js, including SSR, Styled Components, and Tailwind CSS across real estate, fintech, e-commerce, and SaaS domains.
Frontend Architecture & Technical Leadership
Strong background in designing and leading frontend architectures across multiple repositories and international teams, including code reviews, mentoring engineers, and coordinating production releases.
Backend & API Integration
Solid experience with Node.js, Fastify, Express.js, REST APIs, MongoDB, and MySQL, enabling full-stack delivery and seamless integration between frontend applications and backend systems.
State Management
Proficiency in Redux, Redux Toolkit, React Query, and Axios for managing complex application state and asynchronous data flows.
Testing & Quality Assurance
Hands-on experience with Jest, Cypress, Playwright, BDD, and automated testing strategies to ensure production reliability and end-to-end coverage.
Cloud & CI/CD
Practical knowledge of AWS, Docker, CircleCI, and GitHub Actions for continuous integration, delivery, and cloud-based deployments.
Ad Tech & Monitoring
Experience with Google Ad Manager (GAM), Google Publisher Tag (GPT), Single Request Architecture (SRA), CMP, and Datadog for advertising infrastructure and production monitoring.
Tooling & Collaboration
Familiarity with Git, Figma, Storybook, AVIV Gemini Design System, Agile, and Scrum methodologies for efficient team collaboration and product delivery.
Experience
Professional experience5 - 10 years
Freelancer since2018
Languages
GermanBasic knowledgeEnglishFluentBosnianNative speaker
Project history
Led frontend advertising architecture across 5+ repositories for SeLoger, Immowelt, Logic-Immo, and Immonet. Designed and implemented migration of 50+ ad placements to Google Publisher Tag / Google Ad Manager Single Request Architecture (SRA). Increased ad fill rate and viewability from roughly 20-30% to 80-90%. Directed architecture, code reviews, releases, and production monitoring; reviewed work for 3-4 engineers and mentored 1 engineer. Engineered consent-aware CMP flows, responsive ad size mapping, and targeting/BFF integrations using React, TypeScript, Node.js/Fastify, REST APIs, and Datadog.
Delivered 40+ production features and customer journeys for Zurich Invest's Client App and Investor/Admin Panel. Developed complex joint-account flows requiring synchronization across 2 backend systems and rule-based KYC flows. Modernized 4 core workflows including KYC, joint accounts, onboarding, and investment journeys. Acted as go-to engineer in a 4-person frontend team, making architectural decisions, reviewing PRs, and collaborating with backend, QA, and product colleagues.
Architected and led frontend development of 2 production applications including a React/Next.js storefront and internal admin panel, replacing the legacy Magento storefront. Improved site speed, SEO/organic visibility, and checkout conversion, and implemented a new Stripe payment integration. Oversaw frontend architecture, PR reviews, mentoring, releases, and coordination with backend, product, and design teams; maintained Cypress end-to-end coverage for critical journeys.