Senior Full-Stack Developer (Python / Java / React)

Zemash; Pakistan; Remote; PKR 24,910,000 - 41,517,000; Full time

Benefits offered by this job

Flexible remote work

Remote collaboration with UK intlteams

Job summary

ZEMASH, a UK-based digital solutions partner, seeks a Seasoned Senior Full-Stack Developer to own end-to-end architecture and delivery across Python, Java, and React. You will lead design, coding, and performance optimization for scalable products while collaborating with international teams.

The role emphasizes deep systems thinking, code craftsmanship, and fluent English communication with UK stakeholders.

Qualifications

• Minimum 6 to 7 years of dedicated, hands-on experience in full-stack software development.
• Deep knowledge of Python and Java, including frameworks such as Django, FastAPI, Flask, and Spring Boot.
• Advanced React proficiency with modern state management and SSR/Next.js topics.

Responsibilities

• End-to-End Architecture & Development: Design, build, and maintain scalable full-stack applications using Python, Java, and React.
• Deep Code Craftsmanship: Write clean, high-performing, well-documented, and testable code; analyze performance and memory usage.
• Backend Systems & APIs: Develop robust RESTful and GraphQL APIs, microservices, and system integrations.
• Front-End Excellence: Build dynamic, responsive UIs in React with a strong focus on user experience.
• Code Reviews & Quality Standards: Enforce quality, mentor peers on architectural best practices.
• Database & Infrastructure Management: Design schemas (SQL/NoSQL) and support cloud deployment/CI-CD pipelines.
• Cross-Functional Collaboration: Work with product managers, UX designers, and UK clients to translate requirements.

Skills

Full-Stack development

Python & Java mastery

React proficiency

Problem-solving

Code craftsmanship

Tools

Docker

Git

CI/CD pipelines

AWS/GCP

Job description

AtZEMASH,we deliver high-performance digital solutions,custom software,and scalable technology frameworks for businesses across the UK and internationally.We take pride in building robust,high-quality software architectures and are looking for a Seasoned Senior Full-Stack Developer who takes deep pride in code craftsmanship,systems design,and performance optimization.

About ZEMASH

AtZEMASH,we deliver high-performance digital solutions,custom software,and scalable technology frameworks for businesses across the UK and internationally.We take pride in building robust,high-quality software architectures and are looking for a Seasoned Senior Full-Stack Developer who takes deep pride in code craftsmanship,systems design,and performance optimization.

Role Overview

We are seeking aSenior Full-Stack Developerwith6 to 7+ yearsof hands-on experience in full-stack architecture.In this role,you will lead the design and development of complex digital products,taking ownership of backend services,dynamic front-end interfaces,and core system architectures.

The ideal candidate does not just write functional code—you possess anin-depth understanding of code execution, underlying framework architectures, optimization, and scalable engineering practices.As you will be working closely with a UK-based team and stakeholders,fluent English communication (written and spoken)is strictly required.

Key Responsibilities

• End-to-End Architecture & Development:Design,build,and maintain scalable full-stack applications using Python,Java,and React.
• Deep Code Craftsmanship:Write clean,highly performant,well-documented,and testable code.Deeply analyze code performance,memory utilization,execution context,and algorithmic efficiency.
• Backend Systems & APIs:Develop robust RESTful and GraphQL APIs,microservices,and system integrations using Python and Java frameworks.
• Front-End Excellence:Build dynamic,responsive,and intuitive user interfaces in React,ensuring seamless UX and optimal browser performance.
• Code Reviews & Quality Standards:Enforce rigorous code quality standards,conduct thorough peer code reviews,and mentor team members on architectural best practices.
• Database & Infrastructure Management:Design efficient database schemas (SQL/NoSQL),write optimized queries,and assist with cloud deployment/CI-CD pipelines.
• Cross-Functional Collaboration:Partner directly with product managers,UX designers,and UK-based clients to translate technical requirements into clean software solutions.

Requirements & Qualifications

Experience & Core Competencies

• Minimum 6 to 7 yearsof dedicated,hands-on experience in full-stack software development.
• In-Depth Mastery of Python & Java:Deep knowledge of core language internals,asynchronous programming,concurrency models,memory management,and major frameworks (e.g.,Django,FastApi,Flask / Spring Boot).
• Advanced React Proficiency:Strong experience with React fundamentals (Hooks,Context API,Redux/Zustand,state management,SSR/Next.js,performance profiling,and component lifecycle).
• Deep Technical Foundations:Exceptional knowledge of Data Structures,Algorithms,System Architecture,Object-Oriented Design (OOD),and Design Patterns.You understandwhyandhowcode works under the hood.

Communication & Soft Skills

• Fluent English Communication:High fluency in both spoken and written English isessentialfor daily stand-ups,technical documentation,and direct collaboration with our UK team and clients.
• Problem-Solving & Ownership:Strong analytical mindset with a passion for debugging,root-cause analysis,and optimizing complex systems.

Technical Stack Expectations

• Languages & Frameworks:Python,Java,JavaScript (ES6+),TypeScript,React.js.
• Databases:PostgreSQL,MySQL,Redis,MongoDB.
• DevOps & Tools:Git,Docker,CI/CD pipelines,AWS/GCP experience is a strong plus.
• Testing:PyTest,JUnit,Jest,React Testing Library,TDD principles.

What We Offer

• Opportunity to work on high-impact projects with a UK-based technology company.
• A collaborative culture that values code quality,continuous learning,and engineering excellence.
• Flexible working environment with remote options.
• Competitive compensation matched to experience and technical capability.