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senior full stack developer Jobs in Karachi

senior full stack developer

senior back end java developer

QuickStart Technologies, Inc.

Job description:Sr. Fullstack Developer (JAVA)Job Locations: PK - KarachiType: Regular Full-Time (3 Months Contract)Working hours: 12 pm &ndash; 9 pm Pakistan timeVision: Transforming how the world discovers, develops, and unleashes cyber talent.Mission: We&rsquo;re not just filling skills gaps&mdash;we&rsquo;re redefining how companies hire, grow, and retain the people who power their security future.At QuickStart, we are committed to upholding the following core values:Passion |Respect | Accountability | Innovation | Speed | Execution [ PRAISE ]Job SummaryWe are looking for a skilled and motivated Sr. Fullstack Developer (JAVA) with at least 3 years of hands-on experience in developing robust, scalable, and high-performance applications. You will play a key role in designing and building backend systems, APIs, and microservices that support mission-critical business functions.This is an excellent opportunity for a developer who is passionate about clean code, system architecture, and delivering high-quality software in a collaborative environment.Key Responsibilities<ul><li>Design, develop, test, and deploy high-quality Java applications</li><li>Build and maintain backend services using Spring Boot or other Java frameworks</li><li>Develop and integrate RESTful APIs for internal and external use</li><li>Collaborate with frontend developers, DevOps, QA, and product managers</li><li>Optimize performance and scalability of applications</li><li>Hands-on experience with AI-assisted development tools such as GitHub Copilot and ChatGPT</li><li>Follow Agile development practices and participate in daily stand-ups</li></ul>Required Skills &amp; Qualifications<ul><li>3+ years of professional experience in Java development</li><li>Strong understanding of Core Java, OOP principles, and design patterns</li><li>Hands-on experience with Spring Boot, Spring MVC, and Spring Data</li><li>Experience in building RESTful web services</li><li>Proficiency in SQL and relational databases like MySQL, PostgreSQL, or Oracle</li><li>Familiarity with Git or other version control systems</li><li>Basic understanding of Maven or Gradle</li><li>Experience with unit testing frameworks like JUnit or TestNG</li></ul>Preferred (Nice to Have)<ul><li>Experience with Microservices architecture</li><li>Exposure to Cloud platforms (AWS, Azure, GCP)</li><li>Familiarity with Docker or Kubernetes</li><li>Understanding of message queues (Kafka, RabbitMQ)</li><li>Prior experience in Agile/Scrum environments</li></ul>Education<ul><li>Bachelor&rsquo;s or Master&rsquo;s Degree in Computer Science, Software Engineering, or a related field</li></ul>Job Types: Full-time, Contract Contract length: 3 monthsPay: Rs275,000.00 - Rs300,000.00 per monthWork Location: In person

Sr. Fullstack Developer (JAVA)

Confiz

<div>We at Confiz are hiring for a Java Developer with 5+ years of experience. The ideal candidate will be a Java expert with a primary focus on building secure, scalable applications. They will also be responsible for maintaining existing systems, mentoring junior developers, and collaborating with cross-functional teams.
Responsibilities
<ul><li>Design, develop, and maintain secure, scalable applications using Java (11+) and Spring Boot.</li>
<li>Build robust RESTful and SOAP APIs as well as microservices for seamless integration.</li>
<li>Ensure best practices in design, architecture, and coding standards.</li>
<li>Work with JSON and XML for data interchange and handle serialization/deserialization.</li>
<li>Implement and manage encryption/decryption mechanisms (AES, RSA, TLS) for secure storage and communication.</li>
<li>Oversee production deployments, ensuring zero downtime and rollback mechanisms.</li>
<li>Manage CI/CD pipelines using Jenkins, GitLab CI, or GitHub Actions with automated testing and configuration management.</li>
<li>Develop database schemas, write optimized queries, and manage integrations with relational databases (MySQL, PostgreSQL, Oracle).</li>
<li>Familiarity with NoSQL databases such as MongoDB, Redis, or Cassandra is a plus.</li>
<li>Strong understanding of HTTP/HTTPS protocols, methods, and secure communication standards.</li>
<li>Implement unit, integration, and functional testing using frameworks like JUnit and Mockito.</li>
<li>Write and maintain thorough test cases to ensure quality and functionality.</li>
<li>Work closely with Product, QA, and DevOps teams to achieve project goals.</li>
<li>Mentor junior developers on coding, documentation, and testing best practices.</li>
</ul>
Required Skills
<ul><li>A strong candidate will have a bachelor&rsquo;s degree in computer science (or related discipline) with a minimum of 5 years of hands-on experience in Java.</li>
<li>Experience: 5+ years of hands-on experience in Java (preferably Java 11 or later).</li>
<li>Education: Bachelor&rsquo;s degree in computer science or related field.</li>
<li>Core Skills: Java, Spring Boot, Spring Security, Spring Data, Spring Cloud, REST/SOAP APIs, JSON/XML, Microservices, HTTP/HTTPS protocols, Encryption/Decryption (AES, RSA, TLS), JUnit, Mockito, Git.</li>
<li>Database: MySQL, PostgreSQL, Oracle; familiarity with NoSQL databases (MongoDB, Redis, Cassandra).</li>
<li>CI/CD Tools: Jenkins, GitLab CI, GitHub Actions.</li>
<li>Cloud: AWS experience is highly desirable.</li>
<li>Tools: Git, JIRA, Confluence, or similar collaboration tools.</li>
<li>Containerization with Docker and orchestration with Kubernetes.</li>
<li>Exposure to Agile/Scrum methodologies.</li>
</ul>
We have an amazing team of 700+ individuals working on highly innovative enterprise projects &amp; products. Our customer base includes Fortune 100 retail and CPG companies, leading store chains, fast-growth fintech, and multiple Silicon Valley startups. What makes Confiz stand out is our focus on processes and culture. Confiz is ISO 9001:2015, 27001:2013 &amp; 20000-1:2018 certified. We have a vibrant culture of learning via collaboration and making the workplace fun. People who work with us work with cutting-edge technologies while contributing success to the company as well as to themselves.</div>

Senior Java/Spring Boot Developer

SHAH QALIFIED LTD

We Are Hiring Senior Backend Developer Are you passionate about building scalable backend systems, managing real-time communication, and working with cutting-edge IoT technologies? Join LIMI AI as a Senior Backend Developer and take ownership of backend architecture, APIs, and integrations that power our next-generation platforms.What You Will Do:*Architect, develop, and maintain backend services with Node.js and Express.js. *Build and optimize REST APIs and real-time pipelines with WebSocket and Socket.io. *Model and manage data across MongoDB, PostgreSQL, and MySQL. *Implement smooth deployments with CI/CD pipelines (GitHub Actions). *Scale distributed services with Docker, Nginx, PM2, and Redis. *Integrate IoT ecosystems via MQTT, EMQX, and ThingsBoard. *Ensure reliability, scalability, and performance through monitoring and optimization.What We Looking For:*Proven experience as a Backend Developer (5+ years, with 2+ years in senior/lead roles). *Strong expertise in Node.js, Express.js, REST APIs, WebSocket.*Hands-on with relational &amp; non-relational databases (PostgreSQL, MySQL, MongoDB). *Solid grasp of Dockerized deployments, Git workflows, and CI/CD. *Familiarity with Nginx, PM2, Redis for performance and scalability. *Bonus: Experience with IoT protocols (MQTT) and brokers (EMQX, ThingsBoard). *Strong problem-solving skills and debugging mindset. *Ability to mentor and collaborate across teams.Job Type: Full-timePay: Rs60,000.00 - Rs170,000.00 per monthWork Location: In person

Senior Backend Developer

Pakistan Single Window (PSW)

<div>
 <ul>
 <li>
 Design and develop microservices-based backend systems using best practices and architectural patterns
 </li>
 <li>
 Design &amp; Develop Software applications as per specification by following the guidelines and best practices
 </li>
 <li>
 Collaborate with front-end developers, DevOps engineers, and other stakeholders to create efficient and scalable APIs
 </li>
 <li>
 Implement and maintain RESTful APIs and communication protocols
 </li>
 <li>
 Experience of distributed systems, RESTful APIs, communication protocols and message brokers (e.g., RabbitMQ, Kafka)
 </li>
 <li>
 Optimize and improve the performance and reliability of microservices
 </li>
 <li>
 Ensure high code quality, security, and adherence to coding standards
 </li>
 <li>
 Participate in code reviews and provide constructive feedback
 </li>
 <li>
 Familiarity with API gateways, load balancers, and service discovery mechanisms
 </li>
 <li>
 Troubleshoot and debug issues in production and development environments
 </li>
 <li>
 Work with containers and orchestration tools (e.g., Docker, Kubernetes)
 </li>
 <li>
 Stay up-to-date with emerging technologies, frameworks, and best practices in microservices development
 </li>
 <li>
 Contribute to the documentation and knowledge sharing within the team
 </li>
 <li>
 Participate in scrum meetings to ensure the delivery as per plan
 
 
 </li>
 </ul>
 
 Requirements
 
 
 
 <ul>
 <li>
 Strong software engineering fundamentals in OOAD, design patterns, MVC, data structures, algorithms etc
 </li>
 <li>
 Experience or knowledge of C#, .NET Core, Newer .Net version, SQL Server, Oracle or other RDBMS, Dapper, Entity Framework Core
 </li>
 <li>
 Experience or knowledge of Rest &amp; GraphQL APIs development
 </li>
 <li>
 Experience or knowledge of source control (Git, SVN) &amp; unit testing tools
 </li>
 <li>
 Knowledge of Golang, NoSQL and Graph Database would be plus
 </li>
 <li>
 Strong interpersonal, written, and verbal communication skills
 </li>
 <li>
 Ability to perform comfortably in a fast-paced, deadline-oriented, agile environment
 </li>
 <li>
 Self-motivated, quick learner and a responsive team player
 </li>
 <li>
 Strong Problem-solving, debugging and analytical skills
 </li>
 <li>
 Knowledge and understanding of micro services
 </li>
 <li>
 4-5 years of relevant work experience
 
 
 </li>
 </ul>
 
 Benefits
 
 
 
 <ul>
 <li>
 Competitive salary
 </li>
 <li>
 Fuel Card
 </li>
 <li>
 Health benefits
 </li>
 <li>
 Professional development opportunities
 </li>
 <li>
 Inclusive work culture &amp; much more
 </li>
 </ul>
</div>

Sr. Software Engineer - II (Back-end)

Pakistan Single Window

<div><ul><li>Design and develop microservices-based backend systems using best practices and architectural patterns</li>
<li>Design &amp; Develop Software applications as per specification by following the guidelines and best practices.</li>
<li>Collaborate with front-end developers, DevOps engineers, and other stakeholders to create efficient and scalable APIs</li>
<li>Implement and maintain RESTful APIs and communication protocols</li>
<li>Experience of distributed systems, RESTful APIs, communication protocols and message brokers (e.g., RabbitMQ, Kafka)</li>
<li>Optimize and improve the performance and reliability of microservices</li>
<li>Ensure high code quality, security, and adherence to coding standards</li>
<li>Participate in code reviews and provide constructive feedback</li>
<li>Familiarity with API gateways, load balancers, and service discovery mechanisms</li>
<li>Troubleshoot and debug issues in production and development environments</li>
<li>Work with containers and orchestration tools (e.g., Docker, Kubernetes)</li>
<li>Stay up-to-date with emerging technologies, frameworks, and best practices in microservices development</li>
<li>Contribute to the documentation and knowledge sharing within the team</li>
<li>Participate in scrum meetings to ensure the delivery as per plan.</li>
</ul>
Requirements
Strong software engineering fundamentals in OOAD, design patterns, MVC, data structures, algorithms etc.
Experience or knowledge of C#, .NET Core, Newer .Net version, SQL Server, Oracle or other RDBMS, Dapper, Entity Framework Core
Experience or knowledge of Rest &amp; GraphQL APIs development
Experience or knowledge of source control (Git, SVN) &amp; unit testing tools
Knowledge of Golang, NoSQL and Graph Database would be plus
Strong interpersonal, written, and verbal communication skills
Ability to perform comfortably in a fast-paced, deadline-oriented, agile environment
Self-motivated, quick learner and a responsive team player
Strong Problem-solving, debugging and analytical skills
Knowledge and understanding of micro services
5-6 years of relevant work experience 
Benefits<ul>
<li>
Competitive salary</li>
<li>Fuel Card</li>
<li>Health benefits</li>
<li>Professional development opportunities</li>
<li>Inclusive work culture &amp; much more</li></ul></div>

Sr. Software Engineer - III (Back-end)

ARWEN TECH (PVT) LTD.

<div>
 &gt; Back to Jobs
 
 
 Application Monitor Developer
 
 
 Posted on Oct 09, 2025
 
 
 Title
 
 
 Application Monitor Developer
 
 
 Apply before
 
 
 Nov 10, 2025
 
 
 City
 
 
 Karachi
 
 
 
 Responsibilities
 
 
 
 Summary of Job Profile:
 
 
 We are seeking a skilled Application Developer/Administrator with hands-on experience in ASP.NET or Java, along with front-end JavaScript frameworks and SQL Server database management. The ideal candidate will be responsible for supporting enterprise applications, performing troubleshooting, log analysis, and ensuring smooth performance of both applications and their dependencies.
 
 
 
 Essential Duties &amp; Responsibilities
 
 
 
 <ul>
 <li>
 Develop and maintain custom applications using ASP.NET or Java.
 </li>
 <li>
 Utilize JavaScript libraries/frameworks (e.g., JQuery, Dojo, AngularJS) for front-end development.
 </li>
 <li>
 Inspect real user data and extract performance metrics across applications and their dependencies.
 </li>
 <li>
 Provide support and maintenance for custom-built applications.
 </li>
 <li>
 Review and optimize SQL queries and ensure database performance.
 </li>
 <li>
 Monitor SQL Server maintenance tasks and troubleshoot failed processes.
 </li>
 <li>
 Perform log analysis and application troubleshooting to identify and resolve issues.
 </li>
 <li>
 Collaborate with cross-functional teams to enhance system functionality and reliability.
 </li>
 <li>
 Optional Experience with use Application Performance Management (APM) tools for proactive monitoring.
 
 
 </li>
 </ul>
 
 Requirements
 
 
 
 Knowledge, Skills, Abilities (KSA&rsquo;s) required to successfully perform the job:
 
 
 <ul>
 <li>
 Strong programming skills in ASP.NET or Java.
 </li>
 <li>
 Proficiency with JavaScript and frameworks like JQuery, Dojo, or AngularJS.
 </li>
 <li>
 Solid understanding of SQL Server databases, query optimization, and performance monitoring.
 </li>
 <li>
 Experience with application performance monitoring and analysis tools (optional but preferred).
 </li>
 <li>
 Ability to troubleshoot application issues, analyze logs, and resolve incidents effectively.
 </li>
 <li>
 Familiarity with SDLC processes and version control systems.
 
 
 </li>
 </ul>
 
 Education, Experience, Licensure, Certification Required For The Position
 
 
 
 <ul>
 <li>
 Bachelor&rsquo;s degree in Computer Science, Information Technology, Software Engineering, or a related field.
 </li>
 <li>
 Minimum of 3 years in application development and support roles.
 
 
 </li>
 </ul>
 
 Competencies Required To Successfully Perform The Job
 
 
 
 Technical Competencies
 
 
 Behavioral/General Competencies
 
 
 <ul>
 <li>
 ASP.NET / Java development
 </li>
 <li>
 JavaScript (JQuery, Dojo, AngularJS)
 </li>
 <li>
 SQL Server database management
 </li>
 <li>
 SQL query writing and optimization
 </li>
 <li>
 Application log analysis and troubleshooting
 </li>
 <li>
 APM tools (optional)
 </li>
 <li>
 Version control (Git, SVN, etc.)
 </li>
 <li>
 Analytical thinking and problem-solving
 </li>
 <li>
 Attention to detail
 </li>
 <li>
 Strong communication and interpersonal skills
 </li>
 <li>
 Ability to work independently and within a team
 </li>
 <li>
 Time management and ability to prioritize tasks
 </li>
 <li>
 Continuous learning and adaptability
 
 
 </li>
 </ul>
 
 Benefits
 
 
 
 <ul>
 <li>
 Excellent Salary
 </li>
 <li>
 Fuel Allowance
 </li>
 <li>
 Internet Allowance
 </li>
 <li>
 Medical Insurance
 </li>
 <li>
 Annual Leaves
 </li>
 <li>
 Provident Fund
 </li>
 <li>
 EOBI
 </li>
 <li>
 Annual Bonus
 </li>
 </ul>
</div>

Application Monitor Developer

Global Group of Education Limited

Join our dynamic team as a Web Developer and help shape the digital landscape!Minimum Education Graduation*Education higher then Bachelor shall be given preference.Requirements:<ul><li>Proficiency in HTML, CSS, and JavaScript.</li><li>OR languages like Python (Django, Flask), PHP, Ruby on Rails, or Java</li><li>Experience with responsive design and cross-browser compatibility.</li><li>Familiarity with front-end frameworks (e.g., Bootstrap) and libraries.</li><li>Knowledge of back-end development and database management (e.g., SQL).</li><li>Strong problem-solving skills and attention to detail.</li><li>Portfolio showcasing previous web development projects.</li></ul>Responsibilities:<ul><li>Collaborate with the design team to implement creative solutions.</li><li>Design, code, and maintain websites or web applications.</li><li>Build and manage server-side components, databases, and APIs.</li><li>Optimize website performance for speed and efficiency.</li><li>Troubleshoot and debug issues to ensure smooth functionality.</li><li>Stay updated with emerging web technologies and industry trends.</li><li>Monitor, troubleshoot, and debug website issues.</li><li>Regularly update site content, plug-ins, libraries, or frameworks.</li></ul>Join us in creating innovative web experiences. Apply now with your portfolio!Job Type: Part-timeWork Location: In person

Website Developer

Explore 1047+ Senior back end java developer in Karachi this October. Find roles across top companies and apply now to boost your career.