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senior back end engineer (java) Jobs in Karachi

senior back end engineer (java)

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senior back end engineer java

TechSurge Inc

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 Key Responsibilities
 
 
 
 
 API &amp; Microservices Orchestration
 
 
 
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 Design and build Java‑based microservices that securely mediate between Bank's core banking engine and the external partner ecosystem.
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 Implement resilient, scalable APIs with clear service boundaries and observability.
 
 
 
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 </ul>
 
 Fintech Product Logic
 
 
 
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 Develop proprietary fintech logic for Beyond Banking transactions, including:
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 Travel bookings
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 eSIM provisioning
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 E‑commerce and marketplace purchases
 
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 Ensure tight linkage with core systems such as digital accounts, payments, loyalty, and settlement layers.
 
 
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 </ul>
 
 Third‑Party Integrations
 
 
 
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 Architect secure, high‑availability integrations with super‑app orchestrators, travel platforms, fintech aggregators, and service providers.
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 Handle failures, retries, and service degradation gracefully.
 
 
 
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 </ul>
 
 Security &amp; Data Protection
 
 
 
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 Implement advanced authentication and authorization using OAuth2, OpenID Connect, and token‑based security models.
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 Protect sensitive customer data across all third‑party interactions.
 
 
 
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 </ul>
 
 Transactional Integrity
 
 
 
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 Ensure full ACID compliance across all Beyond Banking transactions.
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 Handle complex edge cases such as partial fulfillment, refunds, reversals, and reconciliation between financial and non‑financial systems.
 
 
 
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 </ul>
 
 Platform &amp; Engineering Principles
 
 
 
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 Bank‑grade reliability: No compromise on correctness or integrity.
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 Scalable integration: One platform, many partners.
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 Security‑by‑default: Zero‑trust partner interactions.
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 Observability &amp; resilience: Designed for failure, built for recovery.
 
 
 
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 </ul>
 
 Required Skills &amp; Experience
 
 
 
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 7&ndash;10 years backend experience, with strong Java and microservices expertise
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 Experience working on payments, transactional systems, or fintech platforms
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 Strong understanding of distributed systems, databases, and consistency models
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 Experience integrating with third‑party service providers
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 Strong engineering rigor and ownership mindset
 
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 </ul>
</div>

Senior Back End Engineer (Java)

Techsurge Pvt. Ltd.

Key ResponsibilitiesAPI &amp; Microservices Orchestration<ul><li>Design and build Java‑based microservices that securely mediate between Bank's core banking engine and the external partner ecosystem.</li><li>Implement resilient, scalable APIs with clear service boundaries and observability.</li></ul>Fintech Product Logic<ul><li>Develop proprietary fintech logic for Beyond Banking transactions, including:</li><li>Travel bookings</li><li>eSIM provisioning</li><li>E‑commerce and marketplace purchases</li><li>Ensure tight linkage with core systems such as digital accounts, payments, loyalty, and settlement layers.</li></ul>Third‑Party Integrations<ul><li>Architect secure, high‑availability integrations with super‑app orchestrators, travel platforms, fintech aggregators, and service providers.</li><li>Handle failures, retries, and service degradation gracefully.</li></ul>Security &amp; Data Protection<ul><li>Implement advanced authentication and authorization using OAuth2, OpenID Connect, and token‑based security models.</li><li>Protect sensitive customer data across all third‑party interactions.</li></ul>Transactional Integrity<ul><li>Ensure full ACID compliance across all Beyond Banking transactions.</li><li>Handle complex edge cases such as partial fulfillment, refunds, reversals, and reconciliation between financial and non‑financial systems.</li></ul>Platform &amp; Engineering Principles<ul><li>Bank‑grade reliability: No compromise on correctness or integrity.</li><li>Scalable integration: One platform, many partners.</li><li>Security‑by‑default: Zero‑trust partner interactions.</li><li>Observability &amp; resilience: Designed for failure, built for recovery.</li></ul>Required Skills &amp; Experience<ul><li>7&ndash;10 years backend experience, with strong Java and microservices expertise</li><li>Experience working on payments, transactional systems, or fintech platforms</li><li>Strong understanding of distributed systems, databases, and consistency models</li><li>Experience integrating with third‑party service providers</li><li>Strong engineering rigor and ownership mindset</li></ul>Work Location: In person

Senior Back End Engineer (JAVA)

ACTIVE8 WIRELESS

Location: Karachi | Night Shift (US Operations Alignment)Job SummaryWe are hiring a Senior Full Stack Engineer / Solution Architect to build and scale internal platforms that power a 500+ retail store operation in the US.This role combines hands-on development with system architecture and technical leadership, focused on building internal portals, workflow systems, automation tools, and enterprise integrations.You will play a key role in developing the digital backbone of the organization, driving efficiency, automation, and data-driven operations.Key Responsibilities<ul><li>Design and develop internal portals, dashboards, and workflow systems</li><li>Architect and build scalable backend services and APIs</li><li>Develop automation tools (bots, scripts, RPA) to reduce manual work</li><li>Design and manage databases and data models</li><li>Integrate with third-party systems (CRMs, telecom systems, payment systems, APIs)</li><li>Implement approval workflows, role-based access, and audit systems</li><li>Ensure systems are secure, scalable, and high-performing</li><li>Collaborate with business teams (operations, finance, HR) to translate requirements into systems</li><li>Lead code reviews, architecture decisions, and best practices</li><li>Support deployment, monitoring, and continuous improvement</li></ul>Tech StackBackend<ul><li>.NET Core / ASP.NET Core OR Java (Spring Boot)</li><li>REST APIs (JSON), SOAP (as needed)</li><li>Microservices architecture</li></ul>Frontend<ul><li>React.js / Next.js (preferred) OR Angular / Vue</li><li>HTML5, CSS3, JavaScript (ES6+)</li></ul>Database<ul><li>SQL Server / PostgreSQL / MySQL</li><li>Database design, optimization, and performance tuning</li></ul>Automation &amp; Integration<ul><li>RPA tools (Automation Anywhere, UiPath) or custom automation scripting</li><li>API integrations (REST/SOAP)</li><li>Workflow engines (plus)</li></ul>DevOps &amp; Tools<ul><li>Git (GitHub / GitLab / Bitbucket)</li><li>CI/CD pipelines</li><li>Docker (preferred)</li><li>Cloud platforms (AWS / Azure / GCP &ndash; exposure preferred)</li></ul>Architecture (Preferred)<ul><li>Event-driven systems (Kafka, RabbitMQ)</li><li>Enterprise systems (ERP, CRM, POS, Inventory)</li></ul>Experience Requirements<ul><li>5&ndash;10+ years of software development experience</li><li>Proven experience building:</li><li>Internal portals or enterprise applications</li><li>Workflow/approval systems</li><li>Automation tools or integrations</li><li>Strong experience in API design and database systems</li><li>Experience in retail, telecom, or high-volume transaction environments is a plus</li><li>Experience working with distributed or offshore teams</li></ul>Role Structure (Important)We are open to hiring at two levels depending on experience:1. Senior Full Stack Engineer (Execution-Focused)<ul><li>Strong hands-on coding experience</li><li>Builds and delivers systems end-to-end</li><li>Works under defined architecture</li></ul>2. Solution Architect / Lead Engineer (Architecture-Focused)<ul><li>Defines system architecture and technical standards</li><li>Oversees multiple systems and integrations</li><li>Mentors team and reviews code</li><li>Drives scalability, security, and long-term design decisions</li></ul>Candidates will be evaluated and placed based on experience and capability.Ideal Candidate<ul><li>Strong problem-solving mindset with business understanding</li><li>Able to work in fast-paced, evolving environments</li><li>Balances speed, quality, and scalability</li><li>Experience managing or mentoring small to mid-sized teams</li><li>Ownership-driven with focus on impact, not just development</li></ul>Nice to Have<ul><li>Experience with AI integrations or automation platforms</li><li>Exposure to analytics/reporting systems</li><li>Experience with multi-entity or intercompany systems</li><li>Familiarity with low-code/no-code tools</li></ul>What You&rsquo;ll Be Building<ul><li>Systems used across 500+ retail stores in the US</li><li>Internal tools for:</li><li>Operations management</li><li>Revenue tracking &amp; reconciliation</li><li>Inventory &amp; workflow automation</li><li>Employee and financial processes</li></ul>Why Join Us<ul><li>Work on large-scale, real-world business systems</li><li>High ownership and visibility</li><li>Opportunity to shape the core technology platform</li><li>Direct impact on operational efficiency and growth</li></ul>Job Type: Full-timePay: Rs150,000.00 - Rs250,000.00 per monthWork Location: In person

Senior Full Stack Engineer / Solution Architect (Enterprise Systems & Automation)

Efrotech Private Limited

We are looking for a skilled SQA Automation Engineer with hands-on experience in automation testing using Selenium (C# / Java).Key Responsibilities:<ul><li>Design, develop, and execute comprehensive test plans, test cases, and test scripts.</li><li>Develop and maintain automated test scripts using Selenium WebDriver.</li><li>Design and implement automation frameworks (e.g., Page Object Model).</li><li>Execute test cases and analyze results.</li><li>Perform functional, regression, integration, and system testing.Perform functional, regression, integration, and system testing.</li><li>Lead end-to-end testing efforts for enterprise products (ERP, HCM, CRM).</li><li>Collaborate with developers, product managers, and stakeholders to understand requirements and ensure quality delivery.</li><li>Identify, log, track, and verify defects using bug tracking tools.</li><li>Participate in Agile/Scrum ceremonies and contribute to continuous improvement.</li></ul>Work Location: In person

SQA Automation Engineer

Jami Partners

Role Overview<ul><li>We are seeking a hands-on Lead Backend Architect to serve as the technical owner and primary contributor for a live, high-volume Saudi Crowdfunding Platform operating under strict financial regulatory requirements.</li><li>Based preferably in our Karachi or Lahore office, this role demands a seasoned engineer (6+ years) who actively writes, reviews, and deploys production-grade Java (Spring Boot) and Node.js/TypeScript code daily while simultaneously directing the architectural vision and security posture of the entire payment orchestration layer.</li></ul>Core Responsibilities<ul><li>You will take end-to-end responsibility for the resilience and transactional integrity of microservices handling actual money movement, requiring deep expertise in idempotent design, ACID-compliant MySQL optimization, and reliable asynchronous messaging (RabbitMQ/NATS) using advanced patterns such as Transactional Outbox, Debezium CDC, Dead Letter Queues, and Circuit Breakers.</li></ul>Security &amp; Compliance<ul><li>A critical component of this role is ensuring the platform's Information Security and Resilience are architected to successfully pass multiple VAPT (Vulnerability Assessment and Penetration Testing) rounds annually&mdash;this means you will identify inherent risks in KSA-specific integrations (Banks, Payment Gateways, SIMAH Credit Bureau, e-Signature providers), mitigate them through secure coding (OAuth2/OIDC/SSO), and design failure-recovery mechanisms that preserve data integrity under any failure scenario.</li></ul>Leadership &amp; Collaboration<ul><li>As the squad lead, you will mentor junior developers, drive Agile sprint execution, and translate complex regulatory and business requirements into documented technical specifications (UML/Sequence Diagrams).</li></ul>Requirements<ul><li>Seasoned engineer (6+ years of experience)</li><li>Actively writes, reviews, and deploys production-grade Java (Spring Boot) and Node.js/TypeScript code daily.</li><li>Deep expertise in idempotent design.</li><li>ACID-compliant MySQL optimization.</li><li>Reliable asynchronous messaging (RabbitMQ/NATS)</li><li>Using advanced patterns such as Transactional Outbox, Debezium CDC, Dead Letter Queues, and Circuit Breakers.</li><li>Identify inherent risks in KSA-specific integrations (Banks, Payment Gateways, SIMAH Credit Bureau, e-Signature providers)</li><li>Mitigate them through secure coding (OAuth2/OIDC/SSO)</li><li>Design failure-recovery mechanisms that preserve data integrity under any failure scenario.</li><li>Mentor junior developers.</li><li>Drive Agile sprint execution.</li><li>Translate complex regulatory and business requirements into documented technical specifications (UML/Sequence Diagrams)</li><li>Thrives in the pressure of a live transactional environment.</li><li>Maintains an obsessive attention to detail regarding financial safety.</li><li>Willing to be at the keyboard developing and enhancing features daily to scale this critical platform for the Saudi market.</li></ul>Job Type: Full-timePay: Rs350,000.00 - Rs500,000.00 per monthWork Location: In person

Senior Lead Java Developer

Datamatics Global Services Ltd

<div><h1 class="jobSectionHeader">Senior Data Engineer (12+ Years Experience)</h1><h2 class="jobSectionHeader">
Role Summary</h2>
We are seeking a seasoned Senior Data Engineer with 12+ years of experience in designing, building, and managing scalable data pipelines and architectures. The role requires deep expertise in modern data engineering practices, cloud platforms, and enterprise-grade data solutions to support analytics, reporting, and strategic decision-making.<h2 class="jobSectionHeader">
Key Responsibilities</h2><ul><li>
ETL/ELT Development: Design, build, and maintain robust ETL/ELT pipelines to ingest, transform, and deliver data from diverse sources.</li><li>
Data Lake &amp; Warehouse Design: Architect and implement scalable data lakes and warehouses to support analytics and BI workloads.</li><li>
System Optimization: Optimize data processing frameworks for performance, scalability, and cost efficiency.</li><li>
Data Security: Implement security best practices, encryption, and role-based access controls.</li><li>
Data Governance: Ensure compliance with governance frameworks, data lineage, and quality standards.</li><li>
Collaboration: Work closely with data scientists, analysts, and business stakeholders to deliver reliable data solutions.</li><li>
Automation &amp; CI/CD: Integrate DevOps practices for automated deployment and monitoring of data pipelines.</li><li>
Mentorship: Provide technical guidance and mentorship to junior engineers, fostering a culture of excellence.</li></ul><h2 class="jobSectionHeader">
Required Skills</h2><ul><li>
Programming Expertise: Advanced proficiency in Python, Scala, and/or Java for data engineering tasks.</li><li>
Cloud Platforms: Hands-on experience with AWS, Azure, or GCP for building cloud-native data solutions.</li><li>
Data Architecture: Strong knowledge of data modeling, warehousing, and distributed systems.</li><li>
Big Data Tools: Experience with Spark, Hadoop, Kafka, or equivalent frameworks.</li><li>
SQL Mastery: Expertise in writing optimized queries, stored procedures, and performance tuning.</li><li>
Visualization Support: Ability to prepare curated datasets for BI tools like Power BI or Tableau.</li><li>
Problem-Solving: Strong analytical and troubleshooting skills for complex data challenges.</li></ul><h2 class="jobSectionHeader"> 
Preferred Qualifications</h2><ul><li>
Experience with containerization (Docker, Kubernetes) for data workloads.</li><li>
Knowledge of real-time streaming architectures (Kafka, Kinesis, Event Hub).</li><li>
Familiarity with data mesh and lakehouse architectures.</li><li>
Exposure to machine learning pipelines and advanced analytics integration.</li><li>
Proven track record of leading enterprise-scale data engineering projects.</li></ul>
nH0LSoI5uE</div>

Senior Data Engineer

<div>
 
 Key Responsibilities
 
 
 
 
 End‑to‑End Integration Testing
 
 
 
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 Design and execute complex test strategies for Partner SDK integrations, validating seamless orchestration between Bank's super‑app, middleware layers, partner mini‑apps, and core banking systems.
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 Validate data consistency, state transitions, and transaction integrity across all integration points.
 
 
 
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 </ul>
 
 Automation Framework Ownership
 
 
 
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 Build, maintain and evolve automated test frameworks for:
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 React Native mobile apps (Appium / Detox)
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 Java‑based back‑end services (Selenium / RestAssured)
 
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 Ensure scalable regression coverage as new Beyond Banking verticals are launched.
 
 
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 </ul>
 
 Fintech Compliance, Security &amp; Risk
 
 
 
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 Validate adherence to banking and fintech security standards including PCI‑DSS, encryption, secure session handling, and data privacy requirements.
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 Partner closely with Risk, InfoSec, and Compliance teams to ensure embedded solutions meet regulatory expectations.
 
 
 
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 Cross‑Platform Quality Leadership
 
 
 
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 Lead QA validation across iOS and Android, ensuring that third‑party experiences (eSIM, travel booking, marketplace journeys) retain native‑level performance and UX consistency.
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 Drive performance, reliability, and resilience testing under real‑world conditions.
 
 
 
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 Shift‑Left &amp; Journey‑Centric Testing
 
 
 
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 Embed quality early through shift‑left testing, test strategy alignment, and requirement review.
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 Validate complex, multi‑step user journeys&mdash;particularly handoffs between Bank's UI layers and external partner environments.
 
 
 
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 Platform &amp; Engineering Principles
 
 
 
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 Platform-first: Test reusable components and services once, validate consistently across segments.
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 Security by design: Quality as a first‑class control in fintech and partner integrations.
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 Reliability at scale: Proactive detection of failure modes across distributed systems.
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 Partner-aware testing: Validation beyond internal codebases.
 
 
 
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 Skills &amp; Experience
 
 
 
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 8&ndash;10 years in QA engineering, with strong experience in fintech, banking, or large‑scale digital platforms
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 Proven ownership of mobile and backend automation frameworks
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 Strong experience validating SDKs, APIs, and third‑party integrations
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 Deep understanding of testing in regulated environments
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 Hands‑on, detail‑oriented, and capable of leading quality end‑to‑end
 
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 </ul>
</div>

Senior Software Quality Assurance Engineer (SQA)

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