ai engineer

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junior backend engineer

maintenance engineer

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backend engineer

Key Responsibilities:<ul><li>Design and develop RESTful (and/or GraphQL) APIs and backend services</li><li>Build and maintain backend systems using modern backend frameworks (e.g., Django, FastAPI, Node.js frameworks, or similar)</li><li>Work with Docker and containerization for local development and deployments</li><li>Collaborate with frontend, product, and quality processes to deliver features</li><li>Integrate third-party services and APIs</li><li>Optimize application performance, security, and scalability</li><li>Participate in code reviews and mentor junior developers</li></ul>Required Skills &amp; Qualifications:<ul><li>3&ndash;5 years of professional backend development experience</li><li>Strong proficiency in at least one backend language (Python, Node.js, or similar)</li><li>Hands-on experience with one or more backend frameworks (Django, FastAPI, Express)</li><li>Experience with Docker and containerized applications</li><li>Exposure to at least one cloud platform (AWS, GCP, Azure, etc.)</li><li>Solid understanding of REST APIs, relational databases, and authentication/authorization mechanisms.</li><li>Familiarity with Git and collaborative development workflows</li></ul>Nice to Have:<ul><li>Experience with background jobs, task queues, or async processing</li><li>Knowledge of system design and scalable architectures</li><li>Experience working on multi-product or SaaS platforms</li></ul>Job Type: Full-timeWork Location: In person

Backend Engineer

Avanza Solutions

Senior Backend Engineer (Node.js / Next.js)Lendverse &ndash; AI-Embedded Credit Decisioning PlatformLendverse is building an AI-driven credit decisioning and lending infrastructure for banks and fintechs. We&rsquo;re looking for a Senior Backend Engineer to help scale our core backend systems and financial data pipelines.Responsibilities<ul><li>Build and scale backend microservices using Node.js &amp; Next.js</li><li>Design secure, high-performance REST/GraphQL APIs</li><li>Work on credit scoring, lending, and financial data pipelines</li><li>Integrate with banks, credit bureaus, KYC/AML providers, and payment gateways</li><li>Ensure system reliability, security, and compliance</li><li>Collaborate with product, data, and engineering teams</li></ul>Requirements<ul><li>5+ years backend engineering experience</li><li>Strong hands-on experience with Node.js (NestJS/Express) and Python (FastAPI/Flask/Django)</li><li>Fintech domain experience (lending, payments, banking, credit systems)</li><li>Experience with microservices, PostgreSQL, and cloud platforms</li><li>Familiarity with Docker, CI/CD, and scalable architectures</li></ul>Nice to Have<ul><li>Event-driven systems (Kafka, RabbitMQ)</li><li>AI/ML model integration</li><li>Security, compliance, or regulatory exposure</li></ul>Job Type: Full-timePay: Rs250,000.00 - Rs350,000.00 per monthWork Location: In person

Senior Backend Engineer

Human Capital HR Solutions

Location: KarachiRole Overview: This role is suitable for fresh graduates or early-career professionals who want hands-on experience in backend development in a startup environment.Key Responsibilities:<ul><li>Assist in building and maintaining backend APIs and services</li><li>Work with backend languages such as Python or Node.js</li><li>Fix bugs and support existing backend systems</li><li>Work with databases and simple data models</li><li>Connect backend services with frontend applications</li><li>Follow coding standards and best practices</li><li>Work closely with the development team</li></ul>Requirements:<ul><li>0&ndash;1 year of experience (internships or academic projects are acceptable)</li><li>Basic knowledge of Python, JavaScript, or similar languages</li><li>Understanding of REST APIs</li><li>Familiarity with relational databases</li><li>Basic knowledge of Git</li><li>Willingness to learn and work in a startup environment</li></ul>Nice to Have:<ul><li>Personal or academic backend projects</li><li>Basic exposure to Docker or cloud platforms</li></ul>Salary &amp; Benefits:<ul><li>Market-competitive salary</li><li>Learning and growth opportunities</li><li>Benefits as per company policy</li></ul>How to Apply: Send your resume to: careers1.hc@gmail.com CC: careers@humancapitalintl.com Please mention &ldquo;Junior Backend Engineer&rdquo; in the email subject line.Follow us on social media for the latest job opportunitiesStay updated with new openings, career updates, and company news by connecting with us:Instagram: https://www.instagram.com/humancapitalhrsolutions/ LinkedIn: https://www.linkedin.com/company/human-capital-hr-solution/ Facebook: https://www.facebook.com/humancapitalhrsolution/Job Type: Full-timeWork Location: In person

Junior Backend Engineer

Key Responsibilities:<ul><li>Assist in developing and maintaining backend APIs and services</li><li>Work with one or more backend languages (Python, JavaScript/Node.js, or similar)</li><li>Implement simple features and fix bugs in existing backend systems</li><li>Work with databases and basic data models</li><li>Integrate backend services with frontend applications</li><li>Learn and follow backend coding standards and best practices</li><li>Collaborate with frontend engineers and project managers</li></ul>Required Skills &amp; Qualifications:<ul><li>0&ndash;1 year of experience in backend development (including internships or academic projects)</li><li>Basic knowledge of at least one backend language (Python, JavaScript, or similar)</li><li>Basic understanding of REST APIs</li><li>Familiarity with relational databases</li><li>Basic understanding of Git and version control</li><li>Willingness to learn and grow in a fast-paced product environment</li></ul>Nice to Have:<ul><li>Personal or academic backend projects</li><li>Basic familiarity with Docker or cloud platforms</li></ul>Job Type: Full-timeWork Location: In person

Confiz

<div>We at Confiz are hiring an Principal Backend Engineer with strong expertise in backend technologies, system architecture, and performance optimization. Join our team to design and build scalable, secure, and high-performing backend systems that power exceptional digital experiences for global enterprises..
Responsibilities
<ul><li>Own microservices in NestJS (TypeScript): define module boundaries, version APIs, and ship resilient, well-tested services.</li>
<li>Design internal communication: implement REST/gRPC/event-driven patterns (e.g., request/response, pub/sub), handle retries, timeouts, backoff, and circuit breakers.</li>
<li>Implement secure JWT auth: access/refresh lifecycles, rotation, audience/issuer validation, revocation/blacklisting, and token storage best practices.</li>
<li>Deliver payment integrations: integrate with gateways (e.g., Stripe/Adyen/Braintree), implement idempotent operations, handle captures/refunds/disputes, and reconcile via signed webhooks.</li>
<li>Build and consume webhooks: define payload contracts, verify signatures/HMAC, ensure idempotency, and implement robust retry and DLQ strategies.</li>
<li>Enable real-time features with WebSockets: use NestJS Gateways/Socket.IO or ws for presence, notifications, and fan-out at scale; secure and rate-limit connections.</li>
<li>Use Redis/Valkey effectively: design cache keys/TTLs, apply cache-aside/write-through, implement distributed locks, queues/streams, pub/sub, and mitigate hot keys.</li>
<li>Containerize and run locally: craft efficient multi-stage Docker builds, add healthchecks, and orchestrate multi-service dev stacks with docker-compose.</li>
<li>Quality &amp; reliability: write unit/integration/e2e tests (Jest/Supertest), add schema validation (class-validator/OpenAPI), and instrument with logs/metrics/traces.</li>
<li>Collaborate across teams: review PRs, write concise design docs, and partner with product, frontend, and data to deliver measurable outcomes.</li>
</ul>
Requirements
<ul><li>5+ years building backend systems; 5+ years NestJS + TypeScript in production.</li>
<li>Strong Docker and docker-compose skills (multi-stage builds, image slimming, healthchecks).</li>
<li>Solid microservice design: domain boundaries, API versioning, idempotency, saga/choreography, and eventual consistency (outbox/inbox).</li>
<li>Hands-on JWT implementation in distributed systems.</li>
<li>Demonstrated payment experience (idempotency keys, reconciliation jobs) and webhooks (HMAC/signatures, replay protection, retries).</li>
<li>Built and scaled WebSockets features in production.</li>
<li>Proficiency with Redis/Valkey for caching and real-time patterns; strong SQL fundamentals (PostgreSQL/MySQL) and practical ORM experience (TypeORM/Prisma).</li>
<li>Testing mindset with meaningful coverage and CI checks; working knowledge of security best practices (OWASP, secrets management, least privilege).</li>
<li>Comfortable with telemetry (structured logs, metrics, tracing) and on-call ownership.</li>
<li>Kong Gateway (or similar API gateway) for routing, auth, rate limiting, and observability.</li>
<li>Kubernetes/Helm; service meshes (Istio/Linkerd).</li>
<li>Event platforms (NATS/Kafka/RabbitMQ) and streaming patterns.</li>
<li>GraphQL (Apollo/NestJS) including subscriptions.</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 (QMS), ISO 27001:2022 (ISMS), ISO 20000-1:2018 (ITSM), ISO 14001:2015 (EMS), ISO 45001:2018 (OHSMS) Certified. We have a vibrant culture of learning via collaboration and making workplace fun.
People who work with us work with cutting-edge technologies while contributing success to the company as well as to themselves.
To know more about Confiz Limited, visit: https://www.linkedin.com/company/confiz-pakistan/</div>

Principal Backend Engineer (NestJS / TypeScript / Microservices)

Key Responsibilities:<ul><li>Design and develop RESTful/GraphQL APIs and backend services</li><li>Build and maintain backend systems using frameworks such as Django, FastAPI, or Node.js</li><li>Work with Docker and containerized deployments</li><li>Integrate third-party services and APIs</li><li>Optimize application performance, security, and scalability</li><li>Conduct code reviews and mentor junior developers</li><li>Collaborate with frontend, product, and QA teams for end-to-end solutions</li></ul>Skills &amp; Requirements:<ul><li>3&ndash;4 years of professional backend development experience</li><li>Proficiency in Python, Node.js, or similar backend language</li><li>Experience with Django, FastAPI, Express, or similar frameworks</li><li>Hands-on experience with Docker and containerized applications</li><li>Exposure to cloud platforms (AWS, GCP, Azure)</li><li>Strong understanding of REST APIs, relational databases, and authentication mechanisms</li><li>Familiarity with Git and collaborative workflows</li></ul>Preferred / Nice to Have:<ul><li>Experience with background jobs, task queues, or async processing</li><li>Knowledge of scalable system design and architecture</li><li>Experience in multi-product or SaaS platforms</li></ul>How to Apply:<ul><li>Send your resume to careers1.hc@gmail.com</li><li>CC: careers@humancapitalintl.com</li><li>Please mention the job title in the email subject line.</li></ul>Follow us for the latest job opportunities:<ul><li>Instagram: https://www.instagram.com/humancapitalhrsolutions/</li><li>LinkedIn: https://www.linkedin.com/company/human-capital-hr-solution/</li><li>Facebook: https://www.facebook.com/humancapitalhrsolution/</li></ul>Job Type: Full-timeWork Location: In person

Senior Backend Engineer | IT Sector

Nisum

We are looking for a highly skilled Java Engineer with strong expertise in modern backend technologies, cloud platforms, and scalable system design. The role requires proficiency in .NET, Java, Spring frameworks, microservices, and containerized deployments, with exposure to frontend frameworks as a secondary skill set.What You&rsquo;ll DoThis position is ideal for a driven engineer passionate about building robust backend systems, cloud-native applications, and contributing to high-performing software solutions.Backend Development &amp; Cloud Engineering<ul><li>Design, develop, and maintain backend services using .NET / C# and Java (J2EE/Jakarta EE 9.0+).</li><li>Build microservices and enterprise applications using Spring Framework (5.x+), Spring Boot (2.6+), and Spring Cloud.</li><li>Deploy and manage applications in Docker / Kubernetes environments.</li><li>Implement cloud-native solutions with hands-on AWS Cloud services.</li><li>Apply unit and integration testing frameworks such as JUnit, Mockito, AssertJ, SpringTest, TestContainers, and WireMock.</li><li>Collaborate using GitHub, Jira, and CI/CD pipelines for development and project management.</li></ul>Collaboration &amp; Continuous Improvement<ul><li>Work closely with cross-functional teams to deliver scalable backend architectures.</li><li>Ensure code quality by following clean code, OOP principles, and design patterns.</li><li>Optimize performance, monitor bottlenecks, and maintain security best practices.</li><li>Write and maintain documentation, unit tests, and integration tests for reliability.</li></ul>What You Know<ul><li>3+ years of expertise in Java (J2EE/Jakarta EE 9.0+).</li><li>Hands-on experience with Spring Framework (5.x+), Spring Boot (2.6+), and Spring Cloud.</li><li>Proficiency with Docker, Kubernetes, and AWS Cloud.</li><li>Familiarity with testing frameworks: JUnit, Mockito, AssertJ, SpringTest, TestContainers, WireMock (at least one or two).</li><li>Knowledge of version control (GitHub) and project tracking tools (Jira).</li><li>Secondary exposure to frontend frameworks such as React or Angular.</li><li>Strong problem-solving, debugging, and analytical skills.</li></ul>Education<ul><li>Bachelor&rsquo;s degree in Computer Science, Software Engineering, or a related field.</li></ul>Job Type: Full-timePay: From Rs80,000.00 per monthWork Location: In person

Java Developer

Explore 281+ Backend engineer in Karachi this January. Find roles across top companies and apply now to boost your career.

281 backend engineer jobs IN Karachi

Backend Engineer

Senior Backend Engineer

Junior Backend Engineer

Junior Backend Engineer

Principal Backend Engineer (NestJS / TypeScript / Microservices)

Senior Backend Engineer | IT Sector

Java Developer