Sergiu Negară

Senior Frontend Engineer · Technical Leader · Mentor — TypeScript, React, Vue
sergiu [at] negara.pro · negara.pro · linkedin.com/in/sergiunegara · Chișinău, Moldova

Summary

Senior frontend engineer with 15+ years shipping web platforms and leading the teams behind them. Deep on TypeScript, React, and Vue — comfortable reaching into the backend (Node, NestJS, Postgres, Kafka) to close the loop on features and integrations. Consistent record of raising the bar on engineering practices: testing strategy, release discipline, code review standards, and the Agile/Scrum processes that hold them together. Equally effective as an IC, a tech lead, or the person quietly fixing how a team ships.

Experience

Web Development Consultant — Negara Pro
Mar 2024 – Present
Self-employed · Remote
  • Partner with SMBs and startups to ship performant Vue.js and React UIs from design to production.
  • Build reusable component libraries (Vue 3 Composition API, React Hooks) with TypeScript and SCSS/Tailwind.
  • Optimize front-end performance — bundle size, rendering paths, and critical asset delivery.
  • Integrate REST APIs and WebSocket feeds for dynamic data-driven interfaces.
  • Set up front-end CI/CD: automated linting, unit and E2E tests (Jest, Cypress), and deployment pipelines.
Vue.js · React · TypeScript · Tailwind CSS · SCSS · REST APIs · WebSockets · CI/CD · Jest · Cypress
Senior Software Engineer — GoodLeap (via TechQuarter)
Oct 2025 – Apr 2026
Full-time · Remote
  • Led the unit testing initiative across the platform: audited the codebase, defined a coverage strategy, and drove coverage from near-zero to >50% within ~5 months, on track to the 70–80% target.
  • Delivered features across a micro-frontends architecture using TypeScript, React, React Query, GraphQL, and Tailwind CSS.
  • Contributed to backend services in TypeScript with NestJS, PostgreSQL, and Kafka; containerized workflows with Docker.
  • Worked across FE/BE boundaries to unblock integration work and shorten feedback loops for product teams.
TypeScript · React · React Query · GraphQL · Tailwind CSS · Micro-frontends · NestJS · PostgreSQL · Kafka · Docker · Unit Testing · Test Coverage Strategy
Senior Software Engineer — Winerist Ltd
Jan 2023 – Dec 2023
Full-time · Remote
  • Built new features on an existing Angular codebase and shared component library.
  • Designed dynamic, data-driven interfaces in Figma and translated them into code consuming REST APIs for tours, hotels, availability, and user profiles.
  • Contributed to performance improvements that measurably reduced load times.
  • Resolved SEO and analytics issues after the platform’s migration to Angular, improving overall SEO health.
  • Maintained WordPress microsites with targeted updates and bug fixes.
  • Collaborated in Scrum sprints with PMs, frontend and backend engineers to deliver on schedule.
Angular · TypeScript · REST APIs · SEO · Figma · WordPress
Technical Lead — Future Fertility
Feb 2022 – Jan 2023
Full-time
  • Led delivery of the patient data management and reporting web apps using Vue.js, JavaScript, HTML5/CSS3.
  • Directed the design and versioning strategy of the REST API (Python/PostgreSQL) to ensure backward compatibility with the desktop lab application.
  • Introduced Agile/Scrum from scratch: sprint planning, stand-ups, retrospectives — cutting release cycles from 6+ months to bi-weekly.
  • Integrated the front end with the Windows lab app for seamless oocyte image capture from microscope-mounted cameras.
  • Collaborated with AI researchers and lab operators to refine workflows, improve usability, and validate requirements.
  • Established release management processes — checklists, QA workflows — for consistent, reliable deployments.
Vue.js · REST APIs · PostgreSQL · Agile/Scrum · Team Leadership · Release Management
Senior Software Engineer — Winerist Ltd
Dec 2020 – Dec 2022
Part-time · Remote
  • Co-led product discovery workshops and redefined the UX for Winerist’s curated wine-travel platform.
  • Conducted UI/UX reviews, iterated on wireframes and prototypes, and set front-end design direction.
  • Maintained the Angular + TypeScript booking widget (availability search, calendar pickers, payment flow).
  • Ensured end-to-end booking reliability.
  • Drove on-page SEO improvements (semantic markup, meta tags, structured data) and boosted Lighthouse scores.
  • Developed and maintained several WordPress sites; built one from scratch.
  • Collaborated in Scrum sprints with PMs, frontend and backend engineers.
Angular · TypeScript · UX Design · SEO · WordPress
Course Author & Instructor — Private Company
Jul 2021 – May 2022
Part-time
  • Designed and delivered a beginner-friendly front-end course covering HTML, CSS, JavaScript, Git, and essential build tools.
  • Created structured materials: slide decks, hands-on projects, and homework assignments.
  • Supported students one-on-one with code reviews, debugging help, and career guidance.
  • Ran live coding sessions and Q&A workshops to tackle common challenges in real time.
  • Assessed progress with actionable feedback, helping multiple students land their first roles in IT.
Curriculum Design · Mentorship · Instructional Design
Development Consultant — FusionWorks
Aug 2021 – Dec 2021
  • Maintained and enhanced the company’s WordPress site running in Docker containers.
  • Diagnosed and fixed bugs, extended features, and added new functionality via custom themes and plugins in PHP.
  • Updated front-end components using HTML5, CSS3, and JavaScript for better UX.
  • Collaborated with stakeholders to scope work and prioritize fixes.
WordPress · PHP · Docker
Full Stack Developer — Makeen
Sep 2020 – Dec 2021
Contract
  • Implemented a reusable React component library using atomic design principles with Storybook documentation.
  • Developed a front-end form builder product (rich fields, drag-and-drop, validation) in React with TypeScript.
  • Packaged and published the component library as an npm module used across multiple products.
  • Collaborated with an extended team of 8–10 front-end developers and QA testers within a waterfall-style process.
  • Wrote unit tests to ensure stability and ease of maintenance.
React · TypeScript · Storybook · Atomic Design · Unit Testing · npm
Full Stack Developer — Normal Bear Media (a Hawke Media Company)
Aug 2020 – Sep 2020
  • Co-developed a WordPress plugin powering a visual configurator for bathtubs with selectable variations and accessories.
  • Built the configurator as a Vue.js app embedded in WordPress pages.
  • Integrated the Vue.js UI with the WordPress REST API to load and save product configurations.
  • Implemented backend plugin logic: custom post types, meta fields, REST endpoints, and admin screens in PHP.
  • Collaborated on Git-based workflows to deliver in a tight two-month timeline.
  • Ensured responsive, cross-browser frontend and optimized asset loading.
Vue.js · WordPress · PHP · REST APIs
Technical Director — Enspire Creative Agency
Jul 2018 – Mar 2020
Full-time
  • Introduced and managed Jira (migrated from Asana) and Confluence for documentation.
  • Set up Bitbucket-based Git workflows with pull requests and code review stages across teams.
  • Implemented CI/CD pipelines for continuous and on-demand builds and deployments.
  • Defined and enforced coding, QA, and release standards — improving delivery quality.
  • Recruited, trained, and coached the development team; fostered better collaboration and skill growth.
  • Collaborated with designers, PMs, and stakeholders to align technical solutions with business goals.
  • Oversaw cross-functional tool and process decisions to streamline workflows and reduce bottlenecks.
Technical Leadership · CI/CD · Jira · Confluence · Bitbucket · Hiring & Coaching
Technical Trainer — SKILLUP Ukraine
May 2018 – Dec 2018
Part-time · Chișinău, Moldova
  • Designed and delivered a beginner-to-intermediate front-end curriculum: HTML5, CSS3, vanilla JavaScript, CLI tooling, programming logic, Git.
  • Built hands-on workshops using Gulp, SASS, and Pug to teach modern build processes.
  • Created targeted homework for each module and provided detailed feedback via code review.
  • Ran in-class coding exercises and Q&A sessions to reinforce learning.
  • Mentored student cohorts; multiple graduates secured front-end developer roles.
Curriculum Design · Mentorship · Gulp · SASS
Frontend Web Developer — Meeco.me
May 2018
  • Delivered a full redesign of the corporate website using HTML5, CSS3, and vanilla JavaScript.
  • Collaborated directly with design and product teams to ensure layout fidelity and user-centric organization.
  • Advised on technical feasibility of design concepts and provided rapid prototyping to guide decisions.
  • Maintained direct communication with the CEO to align on priorities and launch readiness.
  • Ensured responsive behavior across devices and optimized assets for fast page loads.
HTML5 · CSS3 · JavaScript
Development Lead — Agile Partners
Oct 2016 – Sep 2017
  • Led the front-end discipline: set coding standards, ran code reviews, and guided UI component design.
  • Defined and documented workflows for technical and non-technical teams to streamline collaboration and delivery.
  • Implemented Jira, Confluence, and Bitbucket for issue tracking, documentation, and Git/PR workflows.
  • Collaborated with business analysts and stakeholders to translate requirements into front-end solutions.
  • Drove process improvements — agile practices, sprint planning, retrospectives.
  • Created Node.js scripts and build tooling to automate front-end asset compilation and deployment.
Technical Leadership · Code Review · Node.js · Agile/Scrum
Senior UI Developer — Yopeso
May 2016 – Oct 2016
  • Developed UI components for living-room entertainment products using React.js.
  • Served as primary developer on multiple projects, driving features from prototype to production.
  • Wrote unit tests with QUnit.js and configured build pipelines with Gulp.
  • Integrated React apps with backend services via RESTful APIs.
  • Coordinated with distributed design and QA teams on alignment and delivery quality.
React · QUnit · Gulp · REST APIs
Senior UI Developer — Endava
Jun 2015 – May 2016
  • Built single-page applications using AngularJS and React.js for finance, insurance, media, and other clients.
  • Developed hybrid web-mobile apps with Apache Cordova (PhoneGap), JavaScript, and HTML5/CSS3.
  • Integrated front-end features with RESTful services.
  • Worked in cross-functional, distributed teams following Scrum and Kanban practices.
  • Contributed to UX refinements through prototyping and feedback sessions with stakeholders.
AngularJS · React · Apache Cordova · REST APIs · Scrum · Kanban

Previous experience: Rodac Info · Fruitware · Freelance · GPI Holding · AlimConstruct Grup · Creatego (2009 – 2015)

Skills

Languages: TypeScript · JavaScript · HTML5 · CSS3 · SCSS/SASS · PHP · Python · SQL · Bash
Frameworks & Libraries: React · React Hooks · React Query · Vue.js (2 & 3 Composition API) · Angular · AngularJS · Tailwind CSS · GraphQL · Storybook · Node.js · NestJS · WordPress
Tools & Platforms: Docker · Kafka · PostgreSQL · MySQL · REST APIs · WebSockets · Jest · Cypress · Git · Figma · Jira · Confluence
Practices & Leadership: Micro-frontends architecture · Unit testing strategy & coverage planning · CI/CD pipelines · Technical leadership · Agile/Scrum implementation · Release management · Code review & standards · Mentorship & curriculum design · Performance optimization · On-page SEO

Education

Moldova State University — Coursework in Computer Science
Sep 2015 – Jun 2016
Completed first-year core modules in the Bachelor’s program: Programming foundations; HTML & CSS; JavaScript; Python; OOP; Discrete mathematics; Operating systems; Computer networks.

Certifications

Yep!Moldova 2024 Certified Mentor — Yep!Moldova
2024
ID: f75da7b1-4da2-4677-bfa9-906dd750ad05
SKILLS102x: Teamwork and Collaboration — Rochester Institute of Technology
2019
ID: 80a164927ffa44ae9ca10568eb21d06e

Volunteer

Board Member — Makers Moldova
Jan 2018 – Dec 2024
  • Collaborated with the board to plan and organize community meetups, maker fairs, and hands-on workshops.
  • Mentored newcomers on basic prototyping, electronics, and fabrication techniques.
  • Advised on event logistics, venue selection, and volunteer coordination.
  • Partnered with local tech hubs and educational institutions to secure support and resources.
  • Represented Makers Moldova at industry meetups and through social-media community outreach.