Sajid Hussain - Senior Software Engineer

Q: What languages does Sajid speak?

Sajid speaks the following languages: Panjabi/Punjabi (Native), English (Advanced), Urdu (Advanced) .

Q: How many years of experience does Sajid have?

Sajid has at least 20 years of experience. During this time, Sajid has worked in at least 15 different roles and for 18 different companies . The average length of individual experience is 1 year and 1 month . Note that Sajid may not have shared all experience and actually has more experience.

Q: What is Sajid's latest experience?

Sajid's most recent position is Senior Software Engineer at Klarna .

Q: What companies has Sajid worked for in recent years?

In recent years, Sajid has worked for Klarna , SnabbTech , Efficy , PFC , and PrimusTech .

Q: Which industries is Sajid most experienced in?

Sajid is most experienced in industries like Information Technology , Telecommunication , and Banking and Finance . Sajid also has some experience in Media and Entertainment , Transportation , and Retail .

Q: Which business areas is Sajid most experienced in?

Sajid is most experienced in business areas like Information Technology , Product Development , and Quality Assurance . Sajid also has some experience in Operations , Project Management , and Customer Service .

Q: Which industries has Sajid worked in recently?

Sajid has recently worked in industries like Information Technology , Transportation , and Banking and Finance .

Q: Which business areas has Sajid worked in recently?

Sajid has recently worked in business areas like Information Technology , Product Development , and Customer Service .

Q: What is Sajid's education?

Sajid holds a Master in Management Information Systems from Virtual University of Pakistan and a Bachelor in Computer Science from Shah Abdul Latif University .

Recommended expert

Sweden

Experience

Oct 2024 - Feb 2025

5 months

Stockholm, Sweden

Senior Software Engineer

Klarna

Maintained mobile and backend apps supporting in-store consumer purchases.
Addressed and solved technical issues faced by merchants.
Resolved deep-rooted technical issues (e.g., URL encoding for Walmart USA's in-store launch).
Helped the team in migrating the microservices and infrastructure to APAC region.
Reason for leaving: Team eliminated due to restructuring.
Technologies: Java, Spring Boot, AWS, iOS, Swift.

Jan 2024 - Oct 2024

10 months

Stockholm, Sweden

Application Support Engineer

SnabbTech

Provided Level 2 support for Java REST APIs with rapid incident response.
Diagnosed server issues and recorded triage actions and outcomes.
Prioritized and escalated critical support tickets to Level 3 engineers.
Documented bugs and applied change control to stabilize applications.
Maintained service reports and enriched knowledge bases for faster resolutions.
Technologies: DevOps, Java, Dropwizard, SparkJava, AWS.

Jul 2023 - Dec 2023

6 months

Stockholm, Sweden

Senior Backend Developer

Efficy

Maintained and enhanced the Big Data Engine behind APSIS ONE.
Contributed in transforming ORC files from AWS S3 to Riak KV via AWS Step Functions.
Found, raised and fixed Quarkus#36810.
Reason for leaving: Laid off due to downsizing.
Technologies: Java, Eclipse Jersey, Quarkus, AWS.

Oct 2022 - Jul 2023

10 months

Stockholm, Sweden

Senior iOS Engineer

PFC

Contributed in building and extending P.F.C. iOS Application.
Designed a custom StepperView to be used as an independent component in the application.
Implemented KYC question and answer sequence with custom designed UI widgets.
Documented and implemented Savings Account flow backed by SVEA Bank BaaS.
Reason for leaving: Company closed due to investor exit.
Technologies: iOS, Swift.

Jan 2022 - Sep 2022

9 months

Singapore

Senior Software Engineer

PrimusTech

Served in the R&D team proposing solutions followed by POCs.
Integrated IP Camera with Sirius+.
Single handedly designed and implemented a WPF based EMS for a client.
Contributed in the implementation of a queue-based message adaptor system for hospitals.
Technologies: WPF, C#, Spring Boot, Java.

Feb 2020 - Dec 2021

1 year 11 months

Cyberjaya, Malaysia

Hybrid

Technical Architect

DHL

Served as both advisory and hands-on engineer, leading development of the DHL Express iOS app.
Evaluated hybrid mobile frameworks and proposed tech solutions via POCs.
Reviewed previous app version, contributing UX/UI improvements in collaboration with PMO.
Mentored junior developers and ensured code quality through regular reviews.
Technologies: iOS, Swift, Ionic, JavaScript.

Mar 2017 - Feb 2020

3 years

Singapore

Senior Lead Engineer

CoSMo

Led technical initiatives in test automation, Java, and mobile development.
Designed and maintained Google’s WebRTC testing framework, KITE.
Integrated cloud-based load testing into KITE for enhanced scalability.
Developed a native WebRTC client for macOS.
Explored WebRTC integration with React Native, CMake, and Qt.
Contributed to seamless cross-platform WebRTC build systems.
Delivered tailored WebRTC solutions for Symphony, WaveCell, RingCentral, and DarkMatter.
Mentored junior engineers and supported their development efforts.
Technologies: WebRTC, Selenium, Java, Cocoa, Objective-C, React Native, JavaScript, Qt, C/C++, AWS.

Apr 2016 - Mar 2017

1 year

Singapore

iOS Project Lead

Razer

Developed a streaming app connecting a custom camera to YouTube, Twitch, and Facebook.
Tuned ijkplayer configuration for low-latency video playback.
Integrated Nginx and FFmpeg in the application for real-time video format conversion.
Supported sprint and release planning with product and project managers.
Technologies: iOS, Swift, FFmpeg, C.

Jun 2015 - Mar 2016

10 months

Singapore

iOS Team Lead

Honestbee

Led the implementation of consumer and shopper mobile applications.
Contributed to application design through idea validation and UX input.
Recruited, onboarded, and mentored mobile engineering team members.
Established and maintained coding standards to ensure code quality and consistency.
Technologies: iOS, Objective-C, Firebase.

Nov 2013 - Jun 2015

1 year 8 months

Singapore

iOS Tech Lead

Temasys

Designed, implemented, and maintained the SKYLINK SDK for iOS and Android platforms.
Contributed to the architecture of the SKYLINK messaging protocol.
Designed a custom file transfer protocol for SKYLINK, based on TFTP.
Supported video call integration in Viber and Amazon Fire Phone using SKYLINK.
Contributed to Google WebRTC (revisions 5518, 5671, 5674) with core enhancements.
Developed WebRTC plugin installers for Temasys on Safari and Internet Explorer.
Technologies: WebRTC, Objective-C, Swift, Java, C/C++.

Apr 2012 - Oct 2013

1 year 7 months

Singapore

Full Stack Developer

ChingChong

Developed and maintained Feecha, a location-based social/news iOS app.
Built microservices on Google App Engine using Cloud SQL and MySQL GeoSpatial features.
Managed EC2 instances running Java schedulers for image analysis via Amazon SQS.
Implemented NLP-driven keyword extraction and text summarization.
Technologies: iOS, Objective-C, Java, GAE, AWS.

Nov 2011 - Mar 2012

5 months

Singapore

Senior Game Programmer

Nubee

Enhanced casual and social mobile games for iOS and Android, including JapanLife.
Developed gameplay prototypes, including a treasure mining game concept.
Integrated Adobe Photoshop SDK into an internal design tool to streamline asset workflows.
Contributed to the development of Monster Fishing game using Unity.
Technologies: C/C++, OpenGL, C#, Unity.

Jun 2011 - Oct 2011

5 months

Lahore, Pakistan

Senior Technical Lead

Confiz

Mentored iOS, Android, and Ruby on Rails teams, fostering skill growth and code quality.
Contributed to software requirements analysis, effort estimation, and planning.
Conducted interviews, code reviews, and led technical knowledge-sharing sessions.
Technologies: iOS, Android, RoR.

Aug 2010 - May 2011

10 months

Lahore, Pakistan

Principal Software Engineer

Gameview

Led the development of cross-platform mobile games using Cocos2d and NGCore SDK.
Delivered the collectible card game Titans vs. Olympians for the Mobage platform.
Evaluated and prototyped game features using Marmalade SDK (formerly Airplay).
Worked on popular titles including Tap Birds, Tap Jurassic, and Dream Fish.
Technologies: Cocos2d, Objective-C, JavaScript.

Apr 2008 - Aug 2010

2 years 5 months

Lahore, Pakistan

Principal Software Engineer

i2c

Maintained Java scheduling services for database operations on IBM Informix.
Resolved issues related to FTP/FTPS/SFTP file transfers and database locking mechanisms.
Created a custom wrapper for Apache Commons DBCP to optimize connection pooling.
Enhanced the performance and reliability of email and SMS delivery systems.
Delivered codebase improvements through targeted enhancements and bug fixes.
Supported major clients including Western Union, T-Mobile, and Payoneer.
Technologies: Core Java.

Nov 2006 - Mar 2008

1 year 5 months

Karachi, Pakistan

Full Stack Software Engineer

PixSense

Developed and maintained Java Struts-based mobile media upload web application.
Led teams to deliver customized versions for Telenor Pakistan and Vodafone in EU.
Designed and implemented admin tools and registration modules to improve user experience and app management.
Integrated SMS services with backend systems for messaging functionality.
Collaborated with teams to ensure successful deployment and client support.
Improved operations and app performance through ongoing updates and bug fixes.
Technologies: HTML, JavaScript, Java, Apache Struts, Hibernate, JBoss.

Jun 2006 - Nov 2006

6 months

Karachi, Pakistan

Software Engineer

Verticity

Developed Windows applications including MyKidIsSafe, a parental control application.
Conducted analysis and design for software projects in various domains and technologies.
Gathered feedback from customers and fixed bugs to maintain robustness in applications.
Technologies: C#, C/C++, Visual Basic.

Feb 2005 - Jun 2006

1 year 5 months

Karachi, Pakistan

Software Engineer

Smartmicros

Led teams of 3 to 10 as a system architect, overseeing backend and client-side development.
Maintained servlet-based web app and built Java Swing clients with C++ UDP socket servers.
Integrated challenge-response authentication with Active Directory using JNDI and JCIFS.
Developed a columnar DB engine and C++ tools for text folding validation.
Technologies: Java Swing, C/C++, J2EE.

Industry Experience

See where this freelancer has spent most of their professional time.

Experienced in Information Technology, Telecommunication, Banking and Finance, Media and Entertainment, Transportation, and Retail.

Information Technology

Telecommunication

Banking and Finance

Media and Entertainment

Transportation

Retail

Business Area Experience

See which departments and functions this freelancer has contributed to most.

Experienced in Information Technology, Product Development, Quality Assurance, Project Management, Operations, and Customer Service.

Information Technology

Product Development

Quality Assurance

Project Management

Operations

Customer Service

Summary

To be in a leading position in software development utilizing my innovative thinking, robust technical skills, and effective leadership qualities.
To stay abreast of emerging technologies, fostering a collaborative work environment, and delivering exceptional results consistently.
To continue learning, adapting to industry trends, and dedicating in excellence.

Skills

Domains: Fintech, Devops, Martech, Big Data, Bms, Logistics, Webrtc, Test Automation, Wearables, Rapid Commerce, Social Networking, Mobile Gaming, Consulting, Parental Control
Programming Languages: Java, Swift, C#, Javascript, C/c++, Objective-c, Html, Visual Basic, X86 Assembly
Frameworks: Wpf, Selenium, Appium, Hibernate, Quartz Scheduler, Apache Velocity, Cocoa, Ffmpeg, Firebase, Chromium, Firebreath, Photoshop Plugin Sdk, Mobage, Jdbc, Dwr, Jdni, Java Swing
Databases: Postgresql, Riak Kv, Ms Sql Server, Mongodb, Google Datastore, Google Cloud Sql, Sqlite, Ibm Informix, Mysql
Mobile Development: Ios, React Native, Qt, Android Sdk/ndk, Opengl, Unity, Cocos2d, Ngcore, Marmalade
Java Backend: Spring Boot, Dropwizard, Sparkjava, Eclipse Jersey, Quarkus, Google App Engine, Apache Struts, Java Servlets, Apache Tomcat, Jboss
Java Libraries: Jpa, Jcifs, Junit, Testng, Javamail, Jackson, Gson, Mockito, Itext, Smppapi, Whirlycache, Project Lombok, Apache Poi, Apache Log4j, Apache Commons, Apache Httpcomponents
Aws: S3, Ec2, Ecs, Iam, Rds, Sqs, Vpc, Athena, Cognito, Lambda, Dynamodb, Cloudwatch, Step Functions
Version Control: Git, Bitbucket, Mercurial, Svn, Cvs, Ms Vss
Tools: Gradle, Apache Ant, Apache Maven, Pmd, Jprofiler, Swagger, Docker, Jenkins, Datadog, Postman, Cocoapods, Bitrise, Fastlane, Github Actions, Miro, Figma, Zeplin, Jira, Confluence, Slack
Others: Ci/cd, Agile/scrum, Unit Testing, Microservices, Rest Apis, Ui/ux Principles, Apache Orc, Ms Azure

Languages

Punjabi

Native

English

Advanced

Urdu

Advanced

Education

Oct 2006 - Jun 2009

Virtual University of Pakistan

Master of Business Administration, Management Information Systems · Management Information Systems · Pakistan

Oct 1999 - Jun 2001

Shah Abdul Latif University

Bachelor of Computer Science, Software Engineering · Computer Science · Pakistan

Statistics

Experience

Total positions 18

Experience in Information Technology 15.5 y

Avg length 1 y 1 m

Longest experience 2 y 11 m

Global Experience

Countries worked in 4 (Singapore, Pakistan, Sweden, Malaysia)

Primary country Singapore

Expertise

Recent roles Senior Software Engineer, Application Support Engineer, Senior Backend Developer

Main industries Information Technology, Telecommunication, Banking and Finance

Main business areas Information Technology, Product Development, Quality Assurance

Qualifications

Highest degree Master

Profile

Created

December 2025

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Frequently asked questions

Do you have questions? Here you can find further information.

What languages does Sajid speak?

Sajid speaks the following languages: Panjabi/Punjabi (Native), English (Advanced), Urdu (Advanced).

How many years of experience does Sajid have?

Sajid has at least 20 years of experience. During this time, Sajid has worked in at least 15 different roles and for 18 different companies. The average length of individual experience is 1 year and 1 month. Note that Sajid may not have shared all experience and actually has more experience.

What roles would Sajid be best suited for?

Based on recent experience, Sajid would be well-suited for roles such as: Senior Software Engineer, Application Support Engineer, Senior Backend Developer.

What is Sajid's latest experience?

Sajid's most recent position is Senior Software Engineer at Klarna.

What companies has Sajid worked for in recent years?

In recent years, Sajid has worked for Klarna, SnabbTech, Efficy, PFC, and PrimusTech.

Which industries is Sajid most experienced in?

Sajid is most experienced in industries like Information Technology, Telecommunication, and Banking and Finance. Sajid also has some experience in Media and Entertainment, Transportation, and Retail.

Which business areas is Sajid most experienced in?

Sajid is most experienced in business areas like Information Technology, Product Development, and Quality Assurance. Sajid also has some experience in Operations, Project Management, and Customer Service.

Which industries has Sajid worked in recently?

Sajid has recently worked in industries like Information Technology, Transportation, and Banking and Finance.

Which business areas has Sajid worked in recently?

Sajid has recently worked in business areas like Information Technology, Product Development, and Customer Service.

What is Sajid's education?

Sajid holds a Master in Management Information Systems from Virtual University of Pakistan and a Bachelor in Computer Science from Shah Abdul Latif University.

What is the availability of Sajid?

Sajid is immediately available full-time for suitable projects.

What is the rate of Sajid?

Sajid's rate depends on the specific project requirements. Please use the Meet button on the profile to schedule a meeting and discuss the details.