I am an adaptable, enthusiastic software craftsman with a decade of commercial experience across finance, e-commerce and government sectors. I specialize in C# and .NET, with a deep focus on full-stack development, cloud-first architectures, and scalable, maintainable systems. I enjoy shaping requirements into robust designs using Domain-Driven Design, CQRS and event-sourced approaches, while delivering value through clean code, automated testing and disciplined DevOps. Over the years I have led teams and mentored colleagues, thriving on partnering with product and operations teams to ensure reliable releases. I am comfortable working remotely or in London-based teams, and I pursue high performance, security, and resilient software that stands up to high load and regulatory scrutiny.

Robiul Islam

I am an adaptable, enthusiastic software craftsman with a decade of commercial experience across finance, e-commerce and government sectors. I specialize in C# and .NET, with a deep focus on full-stack development, cloud-first architectures, and scalable, maintainable systems. I enjoy shaping requirements into robust designs using Domain-Driven Design, CQRS and event-sourced approaches, while delivering value through clean code, automated testing and disciplined DevOps. Over the years I have led teams and mentored colleagues, thriving on partnering with product and operations teams to ensure reliable releases. I am comfortable working remotely or in London-based teams, and I pursue high performance, security, and resilient software that stands up to high load and regulatory scrutiny.

Available to hire

I am an adaptable, enthusiastic software craftsman with a decade of commercial experience across finance, e-commerce and government sectors. I specialize in C# and .NET, with a deep focus on full-stack development, cloud-first architectures, and scalable, maintainable systems. I enjoy shaping requirements into robust designs using Domain-Driven Design, CQRS and event-sourced approaches, while delivering value through clean code, automated testing and disciplined DevOps.

Over the years I have led teams and mentored colleagues, thriving on partnering with product and operations teams to ensure reliable releases. I am comfortable working remotely or in London-based teams, and I pursue high performance, security, and resilient software that stands up to high load and regulatory scrutiny.

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Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
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Language

English
Fluent

Work Experience

Remote Software Engineer (Contract) at Flagstone
September 1, 2025 - Present
Drove platform migrations and optimisations to scale high-volume financial systems. Implemented event-driven patterns and cloud-first strategies to improve throughput and resilience. Produced critical upgrade runbooks and managed downtime and stakeholder alignment during platform changes.
Remote Software Engineer (Contract) at MoneySuperMarket
March 1, 2024 - August 1, 2024
Built a company-wide page redirect service used across price comparison sites and white labels to route users from results pages to providers. Coordinated with multiple teams in the absence of a dedicated BA/PO, gathered requirements, and learned Node.js and Vue.js. Performed performance and security testing in preparation for production.
Remote Software Engineer (Contract) at Flagstone
August 1, 2023 - February 1, 2024
Developed a migration engine using .NET and Azure services to move users to a new platform with zero customer disruption. Migrated thousands of bank accounts and millions of pounds to scalable cloud-native services. Paired with new engineers to accelerate onboarding and supported late-night deployments to maintain continuity.
Remote Software Engineer (Contract) at Sorted
May 1, 2022 - November 1, 2022
Built a serverless shipping platform as a service using .NET, AWS Lambda, and DynamoDB. Achieved stringent performance SLAs under dynamic load with a cloud-native microservices approach. Improved unit testing practices to shorten feedback loops and accelerate delivery.
Founder and Architect/Principal Developer at Experts Circle
February 1, 2022 - Present
Founder and Architect/Principal Developer leading a startup focused on empowering subject matter experts and transforming recruitment. Responsible for full-stack development of a serverless platform using .NET, Angular/Blazor, AWS Lambda, DynamoDB, StepFunctions, SNS/SQS; setting up CI/CD with CircleCI and guiding architectural decisions.
Remote Software Engineer (Contract) at BuildCircle - Moonpig.com
October 1, 2021 - February 1, 2022
Replatformed and modernised Moonpig's fulfilment process into event-driven serverless systems on AWS. Implemented .NET-backed services with SNS/SQS, Lambda, Angular and Terraform; accelerated onboarding through pair programming and supported late-stage deployments to minimise customer impact.
Software Engineer (Contract) at Just Eat Takeaway.com
June 1, 2020 - October 1, 2021
In the fintech department, improved core event-driven payment and refund processing; reintroduced TDD; migrated several applications to new deployment pipelines; migrated functionalities from monoliths to serverless microservices; decoupled SQL workloads to DynamoDB; globalised multi-tenant codebase and applied CQRS patterns.
Lead Software Engineer (Contract) at Checkout.com
June 1, 2019 - June 1, 2020
Designed and implemented highly available and scalable invoice and reporting services; built FX & Payout platform from scratch; introduced infrastructure as code and improved architecture and maintainability; upskilled team members.
Lead Software Engineer (Contract) at Totaljobs Group/ Stepstone UK
March 1, 2018 - June 1, 2019
Led microservices migration from monolith; architected an auto-scaling, event-driven candidate profile system on AWS (ECS, DynamoDB, SNS/SQS); launched APIs via API Gateway handling tens of millions of requests; expanded multi-tenant capability to Germany and Ireland; won Best Team award.
Software Engineer (Contract) at Just Eat
October 1, 2016 - December 1, 2017
Delivered integration projects for branded restaurant groups; enhanced operations tooling; deployed features weekly; built scalable microservices using AWS with .NET 4.5/Core, Node.js, TypeScript, AngularJS.
Senior Software Developer (Contract) at Transport for London
August 1, 2014 - October 1, 2016
Re-architected backend API for reference data used in contactless payment; implemented DDD, CQRS and Event Sourcing; built a multi-tenant SPA frontend; delivered RESTful APIs handling ~600 requests per second; Azure PaaS and related services.
Software Engineer (Contract) at MerchantCantos
July 1, 2014 - August 1, 2014
Set up cloud continuous integration on Azure Websites; mentored in-house developers; delivered a proof-of-concept SPA using AngularJS for training staff.
Lead Software Engineer (Contract) at British American Tobacco/ Handmade Digital
May 1, 2012 - May 1, 2014
Designed and developed scalable RESTful APIs used globally; built an engine to chart artists/celebrities from social media data; led teams applying DDD, CQRS, Azure and AngularJS.
Lead .NET Developer (Contract) at Decision Technologies
October 1, 2011 - May 1, 2012
Improved product search engine; refactored for quality, scalability and testability using TDD/BDD and SOLID; migrated on-premises CI to the cloud; mentored junior team members.
Web Developer at IPT Ltd
April 1, 2009 - October 1, 2009
Worked on internal and external web applications including the new version of MyOffers; developed a questionnaire management system.
Web Developer at Dial-a-phone/Phones4u / TCS
October 1, 2007 - March 1, 2009
Analyzed requirements and produced prototypes and technical specifications; contributed across the stack using C#, ASP.NET, MVC, LINQ, HTML, CSS, JavaScript, XML, XSLT and SQL.
Web Developer at Confetti Network Ltd.
June 1, 2006 - October 1, 2007
Developed features for Confetti’s e-commerce platform, covering CRM, ERP, CMS, ad-trafficking and KPI reporting in C# ASP.NET.
Web Assistant at SIRVA
June 1, 2004 - June 1, 2005
Developed a connectivity-troubleshooting tool using classic ASP and designed Outlook forms to automate processes, dramatically reducing administrative time.
Software Engineer (Contract) at Just Eat Takeaway
June 1, 2020 - October 1, 2021
Improved core event-driven payment and refund processing; reintroduced TDD; migrated applications to new deployment pipelines; moved functionalities from monoliths to serverless microservices; decoupled from legacy SQL to DynamoDB; globalised multi-tenant codebase; applied CQRS.
Lead Software Engineer (Contract) at British American Tobacco / Handmade Digital
May 1, 2012 - May 1, 2014
Designed scalable RESTful APIs used globally; developed social media data mining engine; led teams applying DDD, TDD and Scrum.
Lead Software Developer at UK Parliament
November 1, 2009 - August 1, 2011
Implemented CQRS, Event Sourcing and NServiceBus; collaborated across teams on distributed messaging; practised TDD/BDD with MSpec; delivered scalable back-office and public-facing applications.
Web Developer at Dial-a-phone / Phones4u / TCS
October 1, 2007 - March 1, 2009
Requirements analysis, prototypes and technical specifications; built web apps with C#, ASP.NET, MVC, LINQ; supported deployments and production support.

Education

BSc (Honours) Information Technology at Middlesex University
January 1, 2002 - June 1, 2006
Higher Secondary Certificate (HSC) at Cantonment Public School & College, Rangpur, Bangladesh
January 1, 1999 - December 31, 2000
BSc (Honours) Information Technology at Middlesex University
January 1, 2002 - January 1, 2006
Higher Secondary Certificate (H.S.C) equivalent to A-levels at Cantonment Public School & College, Rangpur, Bangladesh
January 1, 1999 - December 1, 2000

Qualifications

Advanced Distributed Systems Design with SOA
January 1, 2011 - February 3, 2026
Domain Driven Design - Hands On Immersion Workshop
January 1, 2011 - February 3, 2026
Advanced Distributed Systems Design with SOA
January 1, 2011 - February 3, 2026
Domain Driven Design - Hands On Immersion Workshop
January 1, 2011 - February 3, 2026

Industry Experience

Software & Internet, Financial Services, Professional Services, Retail, Transportation & Logistics, Government, Media & Entertainment