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backend software engineer (node.js / ruby on rails) Jobs in Karachi

full stack software engineer strong backend

MarketCube.io

Full Stack Developer (Node.js / React / GraphQL)Location: Karachi, Pakistan (On-site)About the Role:Market Cube is looking for an experienced Full Stack Developer to join our growing engineering team in Karachi. This is a hands-on role where you'll design, build and maintain scalable applications across multiple products, working with modern technologies including Node.js, React, GraphQL and Shopify.You'll work closely with the product and engineering teams to deliver high-quality software, solve complex technical challenges, and help mentor other developers.Key Responsibilities<ul><li>Design, develop and maintain scalable backend services using Node.js.</li><li>Build modern, responsive web applications using React.</li><li>Develop and maintain REST and GraphQL APIs.</li><li>Build and support Shopify integrations using the GraphQL Admin API, Webhooks, App Bridge and Polaris.</li><li>Develop business-critical functionality, including commission calculations, order splitting and payout logic, ensuring accuracy and reliability.</li><li>Contribute to multiple products across the Market Cube portfolio as business priorities evolve.</li><li>Troubleshoot production issues, resolve bugs, optimise application performance and investigate data-related problems.</li><li>Participate in code reviews and promote engineering best practices.</li><li>Mentor and support mid-level software engineers.</li></ul>Essential Requirements<ul><li>Minimum 5 years' professional software development experience.</li><li>Strong commercial experience with Node.js and JavaScript/TypeScript.</li><li>Strong experience building applications with React.</li><li>Experience designing and optimising PostgreSQL or MySQL databases, including schema design, indexing and query optimisation.</li><li>Experience developing REST APIs, GraphQL APIs, webhooks and asynchronous processing/queues.</li><li>Experience working across multiple applications, codebases or products.</li><li>Ability to translate business requirements into technical solutions with minimal supervision.</li><li>Strong analytical, problem-solving and debugging skills.</li><li>Excellent communication skills and the ability to collaborate within a cross-functional team.</li></ul>Desirable Skills<ul><li>Shopify app development experience.</li><li>E-commerce or multi-tenant SaaS experience.</li><li>Experience with AWS.</li><li>Docker and containerised application development.</li><li>CI/CD pipelines and automated deployment practices.</li></ul>What We Offer<ul><li>Opportunity to work on multiple innovative products using modern technologies.</li><li>A collaborative, supportive and highly skilled engineering team.</li><li>Exposure to challenging technical projects and real business impact.</li><li>Career progression and professional development opportunities.</li></ul>LocationThis is a full-time, on-site position based in Karachi, Pakistan.How to ApplyPlease send the following to Ali.haider@marketcube.io:<ul><li>Your CV.</li><li>Your GitHub profile (or a portfolio of relevant work).</li></ul>Applications submitted without a GitHub profile or relevant portfolio may not be considered.Job Type: Full-timeExperience:<ul><li>React, Node Js, Full Stack Development: 4 years (Required)</li></ul>Work Location: In person

Full Stack Developer (Node.js / React / GraphQL)

LN Technologies

We are looking for a Mid level .NET Core developer with strong experience in ASP.NET Core, Blazor/Razor, and ABP Framework(PLUS), capable of building secure, data-driven applications, including dashboards, analytics, and reporting features.Required Skills &amp; Qualifications:1. Backend Application Development<ul><li>Design, develop, and maintain enterprise-grade web applications using C#, .NET Core, and ASP.NET Core.</li><li>Develop scalable RESTful APIs following industry best practices.</li><li>Build secure and high-performance backend services using Entity Framework Core and SQL Server.</li><li>Develop and maintain Razor Pages and MVC applications.</li><li>Optimize application performance, scalability, and reliability.</li></ul>2. Frontend Development<ul><li>Develop responsive and interactive user interfaces using Angular (TypeScript).</li><li>Build and maintain Razor MVC applications.</li><li>Implement dynamic client-side functionality using JavaScript (ES6+), AJAX/Fetch API, and jQuery where required.</li><li>Develop dashboards, reports, and analytics using modern charting libraries.</li><li>Ensure cross-browser compatibility and responsive design.</li></ul>3. Cloud &amp; Microservices Development<ul><li>Develop and deploy applications on Microsoft Azure.</li><li>Design and implement cloud-native and microservices-based solutions.</li><li>Integrate cloud services to improve scalability, availability, and performance.</li><li>Participate in cloud deployment, monitoring, and optimization activities.</li></ul>4. Database &amp; API Management<ul><li>Design and optimize SQL Server databases.</li><li>Implement data access using Entity Framework Core.</li><li>Develop secure, versioned RESTful APIs.</li><li>Optimize database queries and improve application performance.</li><li>Ensure data integrity and application reliability.</li></ul>6. Code Quality &amp; Best Practices<ul><li>Write clean, reusable, and maintainable code.</li><li>Perform code reviews and ensure adherence to development standards.</li><li>Troubleshoot, debug, and resolve complex technical issues.</li><li>Participate in sprint planning, estimation, and Agile ceremonies.</li><li>Continuously improve application quality through testing and optimization.</li></ul>7. Collaboration &amp; Technical Support<ul><li>Work closely with Business Analysts, UI/UX Designers, QA Engineers, and Project Managers.</li><li>Translate business requirements into technical solutions.</li><li>Provide technical guidance and support to junior developers.</li><li>Collaborate with cross-functional teams to deliver high-quality software solutions.</li></ul>8. Documentation &amp; Continuous Improvement<ul><li>Prepare and maintain technical documentation.</li><li>Document APIs, database structures, and system architecture.</li><li>Stay current with emerging Microsoft technologies and development trends.</li><li>Recommend improvements to development processes and application architecture.</li></ul>Required Qualifications<ul><li>Bachelor's degree in Computer Science, Software Engineering, or a related field.</li><li>3+ years of professional experience in .NET application development.</li><li>Strong expertise in C#, .NET Core, ASP.NET Core, MVC, and Razor Pages.</li><li>Experience with Microsoft Azure Cloud Services.</li><li>Strong understanding of Microservices Architecture.</li><li>Experience developing RESTful APIs.</li><li>Hands-on experience with Entity Framework Core and SQL Server.</li><li>Strong experience with Angular (TypeScript).</li><li>Proficiency in JavaScript (ES6+), AJAX/Fetch API, jQuery, DOM manipulation, and event handling.</li><li>Experience developing dashboards, analytics, and reporting modules.</li><li>Strong understanding of secure application development and software design principles.</li><li>Excellent analytical, debugging, and problem-solving skills.</li><li>Strong communication and collaboration skills.</li><li>Develop scalable RESTful APIs following industry best practices.</li><li>Build secure and high-performance backend services using Entity Framework Core and SQL Server.</li><li>Develop and maintain Razor Pages and MVC applications.</li><li>Optimize application performance, scalability, and reliability.</li></ul>Job Type: Full-timeApplication Question(s):<ul><li>How many years of experience do you have working with .NET Core development?</li><li>How many years of experience do you have working with MVC development?</li><li>Have you worked on EntityFramework Core?</li><li>Have you worked on JavaScript (ES6+)?</li><li>Have you worked on jQuery (legacy &amp; integration scenarios)?</li><li>Have you worked on Chart libraries for analytics?</li><li>Have you implemented Architecture &amp; Design Patterns?</li><li>Do you have experience with Blazor and Razor Pages for building dashboards or data-driven UIs?</li><li>What is your current salary?</li><li>What is your expected salary?</li><li>How soon you can join us?</li></ul>Work Location: In person

Dot Net Developer (Mid Level)

Nexion Corp

We're Hiring: Mid-Level Full Stack Developer Company: Nexion Corp Location: Zamzama Commercial, DHA, Karachi Job Type: Full-Time (Onsite) Shift: Night ShiftNexion Corp is looking for a talented Mid-Level Full Stack Developer with strong expertise in React.js and CMS platforms to join our growing development team.Key Responsibilities<ul><li>Develop modern web applications using React.js and JavaScript frameworks.</li><li>Build, customize, and maintain WordPress, WooCommerce, and Shopify websites.</li><li>Develop APIs and integrate third-party services.</li><li>Collaborate with designers, developers, and project managers.</li><li>Debug, optimize, test, and deploy web applications.</li></ul>Requirements<ul><li>2&ndash;5 years of Full Stack development experience.</li><li>Strong proficiency in React.js (Next.js is a plus).</li><li>Experience with Node.js and Express.js.</li><li>Hands-on experience with MongoDB and/or MySQL.</li><li>Experience with WordPress, WooCommerce, Shopify, and Liquid.</li><li>Knowledge of Git, REST APIs, and responsive web development.</li></ul>Preferred Skills<ul><li>TypeScript</li><li>Docker</li><li>AWS or Vercel</li><li>CI/CD pipelines</li><li>SEO optimization</li></ul>What We OfferMarket Competitive Salary Career Growth Opportunities Collaborative &amp; Innovative Work EnvironmentApply Now: careers@nexioncorp.com Contact: 0312-2881743Pay: Rs50,000.00 - Rs60,000.00 per monthWork Location: In person

Mid-Level Full Stack Developer (React & CMS)

Human Capital HR Solutions

Job SummaryHuman Capital HR Solutions is hiring on behalf of its client for the position of Head of Development (Apps &amp; Web).We are seeking an experienced Full-Stack Development professional to lead and execute end-to-end web and mobile application projects across multiple client accounts. This is a hands-on role where you will independently manage architecture, development, deployment, and maintenance while collaborating with cross-functional teams.Key ResponsibilitiesOwn end-to-end development of client websites, web applications, and mobile apps.Design, build, test, deploy, and maintain scalable web and mobile solutions.Gather technical requirements, estimate timelines, and deliver projects independently.Manage hosting, deployments, third-party integrations, and ongoing maintenance.Perform quality assurance, troubleshooting, and technical support before project delivery.Identify future development hiring needs as project volume grows.Requirements10&ndash;15 years of experience in full-stack web and mobile application development.Experience delivering projects for international, especially US-based, clients.Strong proficiency in modern full-stack technologies such as React/Next.js, Node.js, or equivalent frameworks.Experience with React Native, Flutter, or native iOS/Android development.Hands-on experience integrating third-party APIs, payment gateways, CRMs, and marketing platforms.Ability to independently manage projects from architecture through deployment.Excellent English communication skills.Comfortable working during core US business hours.PreferredExperience with AWS, GCP, Vercel, or other cloud/DevOps platforms.Shopify or headless eCommerce development experience.Experience with AI and automation integrations.How to ApplySend your CV to careers1.hc@gmail.com CC: careers@humancapitalintl.comWork Location: In person

Head of Development (Apps & Web)

NexCurve Technologies

Location: DHA KarachiJob Type: Full-Time (Onsite)Working Hours: 8:00 PM &ndash; 5:00 AM (Night Shift)Experience Required: 3+ YearsAbout the RoleWe are looking for a talented **Web Developer** with strong frontend and backend development skills who can build modern, high-performance websites and web applications. The ideal candidate should have hands-on experience developing custom websites using **HTML, CSS, JavaScript**, and modern frameworks such as **React.js** and **Next.js**, along with expertise in leading CMS platforms including **WordPress, Shopify, and Webflow**.You will work on a variety of projects ranging from fully custom-coded websites and web applications to CMS-based business websites and eCommerce stores. Experience with animations using **GSAP**, API integrations, and website optimization is highly valued.Key Responsibilities* Develop responsive, high-performance websites using HTML5, CSS3, JavaScript, and modern frontend practices.* Build custom web applications using React.js and Next.js.* Create interactive user experiences and animations using GSAP.* Develop, customize, and maintain websites on WordPress, Shopify, and Webflow.* Build custom themes, components, and functionality for CMS platforms where required.* Develop and maintain WooCommerce and Shopify eCommerce stores, including payment gateways, shipping, checkout, and product management.* Integrate third-party APIs, CRM systems, marketing tools, and external services.* Manage backend functionality, databases, and server-side development using PHP and MySQL when required.* Optimize websites for speed, SEO, accessibility, security, and cross-browser compatibility.* Troubleshoot technical issues, bugs, and performance bottlenecks.* Manage website deployments, hosting environments, staging workflows, backups, and migrations.* Collaborate with designers, marketers, and project managers to deliver high-quality digital experiences.* Follow modern development standards, version control, and best practices.Required Skills &amp; Qualifications* 3+ years of professional web development experience.* Strong proficiency in HTML5, CSS3, JavaScript (ES6+), and responsive web development.* Experience with React.js and Next.js.* Experience creating animations using GSAP.* Strong knowledge of WordPress development, including custom themes, plugins, and WooCommerce.* Experience working with Shopify, including theme customization, app integrations, and store management.* Experience developing websites using Webflow, including CMS collections and responsive layouts.* Good understanding of PHP, MySQL, REST APIs, and third-party integrations.* Experience with Git and version control.* Familiarity with hosting environments, cPanel, deployment workflows, and server management.* Knowledge of website performance optimization, caching, security, and SEO best practices.* Strong problem-solving skills with the ability to work independently and manage multiple projects.Preferred Qualifications* Experience with Shopify Liquid templating language.* Experience building custom APIs or working with headless CMS architectures.* Knowledge of Node.js or other backend technologies.* Familiarity with TypeScript.* Experience with Figma-to-code workflows.* Experience working in an agency or multi-client environment.* Understanding of CI/CD workflows and modern deployment practices.Why Join Us?* Opportunity to work on diverse web development projects across multiple industries.* Exposure to modern web technologies and frameworks.* Collaborative and growth-focused work environment.Pay: Rs75,000.00 - Rs90,000.00 per monthWork Location: In person

Web developer I Mid-Senior level I 3+ Years Experience I Onsite I Karachi

Speechify

<div><div>Mission</div>
<div>
The mission of Speechify is to make sure that reading is never a barrier to learning.

Over 50 million people use Speechify's text-to-speech products to turn whatever they're reading &ndash; PDFs, books, Google Docs, news articles, websites &ndash; into audio, so they can read faster, read more, and remember more. Speechify's text-to-speech reading products include its iOS app, Android App, Mac App, Chrome Extension, and Web App. Google recently named Speechify the Chrome Extension of the Year and Apple named Speechify its 2025 Design Award winner for Inclusivity.
Today, nearly 200 people around the globe work on Speechify in a 100% distributed setting &ndash; Speechify has no office. These include frontend and backend engineers, AI research scientists, and others from Amazon, Microsoft, and Google, leading PhD programs like Stanford, high growth startups like Stripe, Vercel, Bolt, and many founders of their own companies
</div>
<div>What You'll Do</div>
<div><ul><li>Lead the design, architecture, and development of native Windows desktop applications using Windows App SDK, WinUI (or related UI frameworks), C#, XAML, and &mdash; when needed &mdash; C++.</li>
<li>Define and enforce best-practices for Windows desktop development across the codebase: code architecture, performance, memory usage, responsive UI, cross-version compatibility (Windows 10/11+), and maintainability.</li>
<li>Drive accessibility efforts: integrate and validate support for accessibility APIs (e.g. Microsoft UI Automation or other relevant Windows accessibility frameworks), ensure UI controls, focus management, keyboard navigation, screen-reader support, and usability for users with disabilities.</li>
<li>Collaborate closely with product designers, UX researchers, QA, and other stakeholders to shape feature planning, UI/UX architecture, and long-term roadmap for the Windows platform.</li>
<li>Take ownership of full lifecycle of features: conception design implementation testing release maintenance. Ensure quality, reliability, and consistency across releases.</li>
<li>Identify, diagnose, and resolve complex bugs, performance bottlenecks, memory leaks, rendering issues, or compatibility problems &mdash; and propose robust architectural or design solutions.</li>
</ul>
</div><div></div><div>An ideal candidate should have</div>

Required:
<ul>
<li>3+ in Windows desktop application development using Windows App SDK, WinUI (or similar), C#, XAML &mdash; and ideally additional experience with native Windows code (C++, Win32/WinRT/COM).</li>
<li>Deep understanding of Windows application architecture, including interop between managed code (.NET) and native code.</li>
<li>Proven track record of designing, building, and shipping production-quality desktop applications, with an emphasis on reliability, performance, scalability, and maintainability.</li>
<li>Strong experience with accessibility APIs on Windows (e.g. Microsoft UI Automation or similar), and a dedication to building accessible and inclusive software.</li>
<li>Excellent software engineering fundamentals: OOP, design patterns, data structures, algorithms, memory management, multi-threading or asynchronous programming (where relevant).</li>
<li>Experience leading technical design, mentoring other engineers, conducting code reviews, and making architecture-level decisions.</li>
<li>Strong communication skills; ability to articulate tradeoffs, collaborate with cross-functional teams, and drive consensus.</li>
<li>A user-centric mindset: focus on building polished, intuitive, and accessible experiences for end users.</li>
</ul>
Preferred / Bonus:
<ul>
<li>Experience with writing automated tests for UI &mdash; unit tests, integration tests, UI automation tests; familiarity with relevant testing frameworks.</li>
<li>Experience with performance optimization for desktop apps (memory usage, startup time, rendering performance, high-DPI support, responsiveness under load).</li>
<li>Experience with localization/globalization, right-to-left UI support, internationalization, accessibility for multiple regions.</li>
<li>Familiarity with telemetry, analytics, crash reporting, logging, and error monitoring in desktop applications.</li>
<li>Previous experience in shaping CI/CD workflows, release pipelines, and deployment strategies for desktop applications.</li>
<li>Demonstrated ability to take ownership of feature areas or modules and drive them long-term, including maintenance, refactoring, and technical debt management.</li>
</ul>
What we offer
<ul>
<li>A high-impact role: you will define architecture, shape the future of our Windows product, and directly influence what millions of users see and experience.</li>
<li>A collaborative, flat-structure engineering culture &mdash; you are not just a coder, but a builder and a decision-maker.</li>
<li>Opportunities to lead &mdash; mentor others, steer technical direction, and grow into broader technical leadership (e.g. Tech Lead, Architect).</li>
<li>Flexibility, autonomy, and responsibility: you define how to solve problems, own features end-to-end, and contribute to long-term product vision.</li>
<li>A purpose-driven mission: building software that's reliable, accessible, and user-centered &mdash; making a real difference for people.
</li></ul>Think you're a good fit for this job?

Tell us more about yourself and why you're interested in the role when you apply. 
And don't forget to include links to your portfolio and LinkedIn.

Not looking but know someone who would make a great fit? 
Refer them!

Speechify is committed to a diverse and inclusive workplace. 
Speechify does not discriminate on the basis of race, national origin, gender, gender identity, sexual orientation, protected veteran status, disability, age, or other legally protected status.</div>

Senior Software Engineer, Windows/Desktop Applications - Karachi, Pakistan

RIKSOF (Private) Limited

RIKSOF is an award-winning agency building AI-enabled solutions for mobile, web and IoT projects.We are currently on the lookout for highly motivated QA &amp; Test Automation Engineer with 3 years of post-graduate experience. In this role, you should be able to work in a challenging environment with seniors.You should have excellent personal, organizational and problem-solving skills.Successful candidates will have the opportunity to work on high visibility and technically complex projects.<ul><li>Ensuring high quality in the software we build through the use of test automation.</li><li>Research and implementation of the latest trends and technologies in Agile development.</li><li>Programming of system and UI test cases.</li><li>Performance and Security Testing</li><li>Writing clear, concise and comprehensive test plans and test cases</li><li>Ensuring project deadlines are met</li></ul>Desired Languages: Javascript or TypescriptRequirements:<ul><li>Proven work experience in software quality assurance</li><li>Knowledge about puppeteer and jenkins.</li><li>Strong knowledge of software QA methodologies, tools and processes</li><li>BS/MS degree in Computer Science</li></ul>Compensation &amp; Benefits<ul><li>Fuel allowance.</li><li>18 annual holidays.</li><li>Employee Old-Age Benefit (EOBI).</li><li>Casual, friendly environment.</li></ul>Pay: Up to Rs100,000.00 per monthWork Location: In person

QA & Test Automation Engineer

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