Go to Website
  • en
  • de

Sajid H.

Senior Software Engineer

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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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 SMSE 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.
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.
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.

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.

Languages

English
Advanced
Punjabi
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 · Software Engineering · Pakistan

Need a freelancer? Find your match in seconds.
Try FRATCH GPT
More actions

Similar Freelancers

Discover other experts with similar qualifications and experience

Shamaila M.

Senior Software Architect

View Profile
Jürgen F.

AR/VR/XR Architect

View Profile
Werner K.

Test Coordinator, Designer and Engineer

View Profile
Marcel M.

Data-Sciencist, AI Engineer, Senior Solution Architect

View Profile
Ulrich C.

Java Architect/Developer – Freelancer

View Profile
Adil S.

Mobile/Backend Developer

View Profile
Arne H.

Devops Fullstack Engineer

View Profile
Denis H.

Architect & Senior Cloud Developer - NEO OCR

View Profile
Anargyros C.

Senior Go/Java Software Engineer

View Profile
Saad K.

Founder

View Profile
Michael K.

Software Developer

View Profile
Christian R.

Data Engineer

View Profile
Tungi D.

Technical PMO | Delivery Master | LLM-Expert

View Profile
Andreas K.

Senior Developer

View Profile
Martin G.

Member of the Product Management and Product Owner Team for Private Cloud Platform

View Profile
fratch Part of Bitkom logo
linkedIncrunchbaseyoutube
  • English
  • Deutsch

2025 © FRATCH.IO GmbH. All rights reserved.