JULIUS OLATOKUNBO
London,UK
Summary
Experienced technology strategist with 17 years in backend, frontend, mobile, and cloud technologies. Specialises in scalable system design and cloud-native solutions, with a history of transforming organisations in finance, media, and technology. Currently at Builder.Ai, leading the development of AI-driven platforms and mentoring cross-functional teams in agile methodologies. Strong background in data strategy and governance, with a focus on delivering secure, high-performance solutions that meet business growth demands.
Overview
36
36
years of professional experience
Work history
Senior Sensei
Builder.Ai
11.2022 - 12.2025
- At Builder.Ai, I was part of the elite Sensei Team, where I worked with cutting-edge LLMs, GenAI, and Visual-Python to deliver AI-driven solutions at scale. My responsibilities extended into mobile app innovation, where I leveraged Kotlin, React-Native, and X-Code, alongside the latest mobile development frameworks, to build AI-powered IDEs for clients. These efforts were directly tied to Builder’s vision of combining intelligent automation with enterprise-grade reliability, enabling customers to innovate faster while future-proofing their platforms.
- A major focus of my role was SwiftUI, and Jetpack driven mobile development, where I designed scalable architectures and implemented rigorous testing strategies ensuring compliance with Google Play and App-Store standards while maintaining reliability under high traffic loads. By embedding Jest test suites into development workflows, I ensured test-driven development (TDD) which improved app stability, reduced regression issues, and allowed faster, more confident releases.
- In parallel, I worked extensively with React-Native, Flutter and Tauri to ensure cross-platform functionality and hybrid app development while ensuring consistency across iOS and Android ecosystems. I incorporated Hilt for dependency injection, strengthening modularity and scalability within TDD frameworks. Every deliverable was carefully aligned with App Store requirements, ensuring not only technical compliance but also an exceptional end-user experience. These practices helped accelerate Builder’s delivery cycles while enhancing product quality.
- Beyond technical execution, I played a critical role as a mentor and leader within the engineering team. I actively guided developers through best practices in backend integration, mobile frameworks, and AI-driven solutions. By running workshops and hands-on sessions, I helped upskill colleagues in areas like containerisation, cloud configurations, and scalable micro-services. This investment in people ensured stronger collective output and reduced delivery risks across teams.
- As a technical leader, I also worked closely with cross-functional groups sales, product, and architecture guilds acting as the technical backbone during client demos and production rollouts. I set coding standards, reviewed architectural designs, and instilled a culture of quality through CI/CD workflows and peer reviews. By fostering collaboration and accountability, I ensured my teams not only met deadlines but also exceeded customer expectations, driving greater ROI and cementing Builder.Ai’s reputation as a global AI innovator.
- Tech Stack: Kotlin, Flutter, SwiftUI, Jetpack, Tauri, React-native, X-Code, LLM, Multi LLM, AI, Gen-AI, Agile, Scrum-Master, TDD, BDD, Ruby-On-Rails, Ruby micro-gems, AWS-Lambda, ElasticSearch, MongoDB, GraphQL, Cucumber, jSON, HTML-5, CSS-3, XML, HTML, D-HTML, CSS, JavaScript, jQuery, Visual-Python, Typescript/Redux, React.js, Angular.js, Backbone.js, Ajax, Mac-OS, Selenium, Cucumber, Capybara, Kafka, Kubernetes, Docker, Cassandra, Go.
Senior Ruby Developer
Kingsbridge Contractor Insurance
01.2022 - 11.2022
- Whilst employed at Kingsbridge Contractor Insurance my primary role was as mentor and team-lead.
- My expertise was utilised to facilitate:
- Back-End development providing new features, optimising DB’s, code reviews and QA PR’s
- Communicate clearly with colleagues from both technical and non-technical backgrounds
- Participate and work with the team to deliver business requirements using Agile
- Support and mentor other team members
- Deliver cloud hosted solutions using AWS
- Implement software solutions such as BDD, TDD, Integration Testing and Unit Testing
- Support the development backlogs Bugs, CR’s, Hot-Fixes, or Feature Improvements
- Develop maintain and deploy CI/CD pipe-lines with Heroku and AWS
- Additionally my required skills included:
- Building micro-services and API’s using Ruby on Rails
- Experience and proficiency using REST, GraphQL & PostgreSQL
- Automated testing (both TDD and BDD), ideally using Rspec
- Distributed version control using Git & Bit-Bucket
- Excellent development skills and experience in Python, Node.js & React
- Extensive experience in Cloud Architecture (Azure/AWS)
- Development experience with Docker
- Experience building systems with Kubernetes
- Tech Stack: Agile, Scrum-Master, TDD, BDD, Ruby-On-Rails, Ruby micro-gems, AWS-Lambda, ElasticSearch, MongoDB, GraphQL, Cucumber, jSON, HTML-5, CSS-3, XML, HTML, D-HTML, CSS, JavaScript, jQuery, React-native, Python, Typescript/Redux, React.js, Angular.js, Backbone.js, Ajax, Mac-OS, Selenium, Cucumber, Capybara, Kafka, Kubernetes, Docker, Cassandra, GO
Senior Ruby Developer
ChilliBean
London
01.2020 - 01.2022
- I was required to facilitate the design of ChilliBean’s asset management system, involving my deep understanding of Ruby security issues and integration with AWS API, enabling ChilliBean to upload video content smoothly and efficiently.
- I liaised with key stakeholders, ensuring agile sprints were implemented according to ISO standardisations and satisfying key user requirements. My in-depth knowledge of Elasticsearch, MongoDB, AWS and Puma enabled me to facilitate these requirements with ease. I am required to process and document services I implement and Design, Develop and Deploy Ruby solutions to enable clients to analyse repositories remotely to ensure all remote access adheres to client requirements.
- I ensured all development meets strict Clinical-Trial compliance requirements; document all development steps; report daily regarding current and projected development steps; liaise with team-members regarding development processes, ensuring code meets required standards, has been Test Driven and has been peer-reviewed; specialise in database architecture ensuring database triggers, indexes and access is compliant, efficient and secure.
- Tech Stack: Agile, Scrum-Master, TDD, BDD, Ruby-On-Rails, Ruby micro-gems, AWS-Lambda, ElasticSearch, MongoDB, GraphQL, Cucumber, jSON, HTML-5, CSS-3, XML, HTML, D-HTML, CSS, JavaScript, jQuery, React-native, Python, Typescript/Redux, React.js, Angular.js, Backbone.js, Ajax, Mac-OS, Selenium, Cucumber, Capybara, Kafka, Kubernetes, Docker, Cassandra, GO
DevOps/Block-chain Engineer
Financial Times
04.2019 - 01.2020
- As Principal Engineer at The Financial Times (FT), I was brought in to deliver secure, scalable, and resilient architecture with a strong focus on DevOps practices and blockchain implementation. I successfully created distributed, virtual, and cloud-based infrastructure tailored for FT’s business-critical systems. Leveraging Infrastructure as Code (IaC) and automated deployment pipelines, I enhanced system reliability while reducing delivery times. My role demanded deep expertise in cloud security, containerized deployments, and scripting automation — all critical to the financial services environment in which FT operates.
- A core responsibility was to design, develop, and provision DevOps support for FT’s Salesforce integration API within its bespoke repository, The Banker. This required not only deep technical knowledge but also the ability to liaise with senior stakeholders and transform complex requirements into concrete technical solutions. I developed FT’s Salesforce/Blockchain integration API using Salesforce Lightning to enable bulk upload, insert, and update of Salesforce records from remote virtual machines. This solution supported advanced database manipulation, backup, archiving, and disaster-recovery, providing a foundation for secure, high-volume data processing.
- In addition to architecture, I worked directly with FT Banker clients to understand their bespoke needs and translate them into innovative solutions. Using Salesforce-Vlocity configuration APIs, Clickstream analytics, and CRM integrations, I built extensible systems that exceeded expectations. My work spanned design thinking, stakeholder analysis, and client presentations, enabling FT to strengthen customer relationships while adopting cutting-edge technical solutions.
- I was also accountable for server-side logic, database optimization, and high-performance API integration. This included managing the interchange of data across server-client SDKs and dashboards while ensuring optimal speed, scalability, and data security. Integrating front-end elements with back-end logic, I ensured seamless user experiences. Additionally, I provided leadership as FT’s Salesforce-Vlocity subject matter expert, guiding internal developers, supporting major clients, and ensuring alignment across all Salesforce-related projects.
- My key responsibilities included building reusable libraries, implementing Ethereum blockchain APIs for Salesforce, ensuring DevSecOps practices, and managing hosting environments spanning relational and non-relational databases. I also deployed SOAP and REST web services, oversaw authentication across multiple systems, and optimized resources on AWS, Azure, Docker, and Kubernetes. With certifications in Salesforce Administration and Vlocity, I consistently delivered high-value solutions, blending technical depth with commercial acumen.
- Tech Stack: Ethereum Block-chain, Ethereum Virtual Machine/Ecosystem, Docker, Smart Contracts, Kubernetes, Helm, Kafka, PHP v7.0, Laravel, Vue.js, Zend, MVC, Agile, Scrum-Master, TDD, BDD, Ruby-On-Rails, Ruby micro-gems, MS Azure, AWS-Lambda, Skype O365-API, Node.js, SalesForce-(Vlocity Clickstream Analytics), SalesForce Lightning, ElasticSearch, MongoDB, GraphQL, Mondrian-OLAP, Cucumber, jSON, HTML-5, CSS-3, XML, HTML, D-HTML, CSS, JavaScript, React-Native, React.js, jQuery, Python, Angular.js, Backbone.js, Ajax, Mac-OS, Linux
Ruby-On-Rails Developer
BigSofa UK
London
08.2018 - 04.2019
- Tech Stack: Agile, Scrum-Master, TDD, BDD, Ruby-On-Rails, Ruby micro-gems, MS Azure, AWS-Lambda, Skype O365-API, Node.js, Yeoman, ElasticSearch, MongoDB, GraphQL, Capybara, jSON, HTML-5, CSS-3, XML, HTML, D-HTML, CSS, JavaScript, React.js, jQuery, Python, React-Native, Angular.js, Backbone.js, Ajax, Mac-OS, Selenium, Cucumber, Linux.
Senior Ruby Developer
Videocall UK
London
03.2017 - 08.2018
- Tech Stack: Agile, Scrum-Master, TDD, BDD, iOS, X-Code, Objective-C, Ruby-On-Rails, AWS-Lambda, Azure, Skype O365-API, Node.js, React-Native, PHP v7.0, Laravel, Vue.js, Zend, MVC, Yeoman, HTML-5, CSS-3, XML, HTML, DHTML, CSS, ElasticDB, MongoDB, Graph-QL, Mondrian-OLAP, Cucumber, Capybara, Selenium, ffmpeg, Kubernetes, Docker, Cassandra, GO, Kafka, JavaScript, React.js, jQuery, Python, Angular.js, Ajax, Centos-Linux, Ubuntu-Linux.
UI/UX Developer
MonitiseCreate UK
London
08.2014 - 03.2017
- At MonitiseCreate, I was brought in for my proven expertise as a UI/UX designer and mobile applications developer, tasked with creating intuitive and engaging apps and web designs for a wide portfolio of digital client products. My role required balancing creativity and technical precision, ensuring that applications and features were not only visually compelling but also scalable and robust. By working closely with product managers, I helped translate client briefs into functional wireframes, prototypes, and high-fidelity mockups that were ultimately used by tens of thousands of end users.
- I leveraged X-Code, Objective-C, and Cocoa-Touch to design and refine mobile apps that adhered to Apple’s stringent design guidelines. I was involved from initial concept to post-development sign-off, taking responsibility for defining style guides, producing polished UI assets, and ensuring seamless user journeys. My deep familiarity with iOS design standards enabled me to create applications that not only met technical requirements but also delivered strong customer satisfaction and brand consistency across client portfolios.
- In addition, I played a key role in Android mobile development using React-Native, which allowed MonitiseCreate to extend its offerings to a broader market. By introducing cross-platform development practices, I helped streamline the app creation process, reducing time-to-market while ensuring feature parity between iOS and Android platforms. This approach significantly enhanced the company’s ability to deliver scalable mobile solutions at pace, enabling clients to leverage greater ROI in the mobile market by reaching wider user bases with consistent, high-quality apps.
- Beyond development, I was instrumental in branding, logo creation, and style guide definition for individual clients, ensuring every project was visually distinctive yet aligned with core usability principles. My design process always incorporated user testing and research, ensuring that each deliverable was data-informed and customer-centric. This methodical yet agile approach allowed me to rapidly iterate on features and validate ideas while maintaining accountability for design and development decisions that directly impacted thousands of active users.
- Finally, I thrived in MonitiseCreate’s fast-paced, agile environment, managing multiple projects simultaneously while delivering high-quality outcomes. I consistently demonstrated a high degree of accountability and ownership over my work, from conception to live deployment. By combining native iOS development (X-Code) with cross-platform Android development (React-Native), I ensured that MonitiseCreate could deliver applications that were visually polished, technically robust, and business-impactful—ultimately reinforcing my credentials as a strong fit for a Mobile Apps Developer (Native iOS & Android) role.
- Tech Stack: Agile, SalesForce, SalesForce Lightning, iOS, X-Code, Objective-C, Cocoa-Touch, Action Script 3.0, Flash CS5, Adobe Creative Suit, HTML-5, CSS-3, XML, HTML, D-HTML, CSS, JavaScript, JQuery, Bootstrap, Python, React-Native, React.js, Angular.js, Ajax, SLA, ISO and ITIL accreditations.
UI/UX Developer
GameAccountNetwork UK
London
03.2014 - 07.2014
- At GameAccount Network, I was headhunted to lead and expand the UX and UI design capability within their digital programme, while also contributing directly to mobile application development. My remit went beyond design leadership, as I became actively involved in shaping the native iOS and Android applications that powered the company’s core gaming products. I was responsible for recruiting, mentoring, and guiding a multidisciplinary team of designers and developers to deliver impactful solutions across mobile roulette and slot gaming systems.
- I utilised X-Code, Objective-C, and Cocoa-Touch to design and build robust, responsive applications that met the high-performance requirements of mobile gaming. My responsibilities spanned the entire design and development process, from prototyping and user testing through to production-ready assets. I worked closely with engineering teams to ensure seamless integration of features and optimised user experiences for real-time, high-frequency gameplay. This approach resulted in highly engaging apps that adhered to WCAG 2.1 accessibility guidelines, ensuring inclusivity for all players.
- In parallel, I contributed extensively to Android mobile development using React-Native, where I supported the delivery of scalable cross-platform gaming solutions. My work on the Mobile Roulette and Slot systems demonstrated the ability to balance immersive design with technical execution. By leveraging React-Native, I helped accelerate development cycles, reduce code duplication, and ensure feature parity across platforms. This ensured customers enjoyed a consistent experience whether on iOS or Android, driving adoption and retention in a competitive market.
- Beyond hands-on development, I championed a customer-centric and hypothesis-driven design approach. By embedding user research, prototyping, and iterative testing into the development lifecycle, I was able to validate concepts early and measure product success using both qualitative and quantitative data. This continuous feedback loop allowed me and my team to deliver features that were not only technically robust but also highly aligned with customer expectations and business outcomes.
- Finally, I continuously improved design and development methodologies by keeping up to date with emerging tools, processes, and best practices. My experience with Agile delivery, paired with a Test-Driven Approach to UI/UX, ensured high-quality, reliable mobile applications. By bridging creative design, technical development, and product strategy, I played a pivotal role in helping GameAccount Network bring innovative digital gaming experiences to market that balanced operational excellence with customer delight.
- Tech Stack: Agile, iOS, X-Code, Objective-C, Cocoa-Touch, Action Script 3.0, Flash CS5, Adobe Creative Suit CS5, Adobe Illustrator CS5, Adobe In-Design CS5, HTML-5, CSS-3, Java, XML, HTML, D-HTML, CSS, JavaScript, JQuery, Ruby-on-Rails, Soap, Ajax, SQL-Server, Selenium-Testing, Capybara-Testing.
UI/UX Manager
Bet365 UK
Staffordshire
08.2013 - 03.2014
- Working within the BET365 Augmented Reality (AR) team, I played a key role in designing and developing cutting-edge mobile applications for high-profile clients. My responsibilities extended across the entire lifecycle — from initial concept proposals to UX strategy, user interaction flows, and final delivery of production-ready assets. This included close collaboration with product owners, designers, and developers to ensure each deliverable aligned with project goals and client expectations.
- One of the most significant contributions I made was on Bet365’s “Early CheckOut” feature, a transformative enhancement to the live betting experience. I worked with cross-functional teams to help design and implement the functionality that allowed customers to cash out early during live betting events. This innovation reduced wait times for payouts by enabling users to collect calculated winnings based on real-time scores, dramatically improving user satisfaction and retention. My role focused on ensuring the interface and interactions were seamless, intuitive, and optimized for both iOS and Android platforms.
- On the iOS development side, I leveraged X-Code, Objective-C, and Cocoa-Touch to deliver robust, responsive mobile applications. I translated complex user flows into efficient and intuitive designs, constructed wireframes, and produced final UI assets that were integrated into iOS builds. By adhering to Agile methodologies, I ensured rapid iterations, continuous user feedback incorporation, and consistent quality throughout development.
- In parallel, I contributed extensively to Android mobile development using React-Native, enabling the delivery of scalable cross-platform solutions without compromising on performance or native experience. I collaborated closely with the backend and AR teams to rapidly prototype, iterate, and refine features such as live odds updates, betting interactions, and immersive AR-enhanced interfaces. This approach accelerated time-to-market while maintaining the high-quality standards Bet365 customers expect.
- In addition to feature development, I continually researched industry best practices in AR, gaming, and UX design. This included evaluating interaction trends, refining user interface design patterns, and applying modern UCD methodologies to ensure optimal usability. My ability to integrate creative vision with technical expertise was pivotal in producing impactful mobile applications that balanced innovation with business outcomes.
- Tech Stack: Agile, iOS, X-Code, Objective-C, Cocoa-Touch, Action Script 3.0, Flash CS5, Adobe Creative Suit CS5, Adobe Illustrator CS5, Adobe In-Design CS5, Adobe-XD, Sketch, Azure, HTML-5, CSS-3, Java, XML, HTML, D-HTML, CSS, JavaScript, JQuery, React-Native, Proto-io Wire-Frame, Cordova, Adobe-PhoneGap, Node.js, ElasticSearch, MongoDB, Soap, Ajax, SQL-Server.
Senior Dev
GlueReply
Lon/Mad
09.2011 - 08.2013
- Tech Stack: Agile, iOS, X-Code, Objective-C, Cocoa-Touch, Action Script 3.0, Flash CS5, Adobe Creative Suit CS5, Adobe Illustrator CS5, Adobe In-Design CS5, HTML-5, CSS-3, Java, XML, HTML, D-HTML, CSS, JavaScript, JQuery, Ruby-on-Rails, Soap, Ajax, SQL-Server.
Senior Web Developer
Metro Design Consultants
08.2009 - 09.2011
- Tech Stack: Silverlight UI Client, Silverlight 5, Prism 4, Pure MVVM, WCF Service Layer Services, Action Script 3.0, Flash, Photoshop CS5, Dreamweaver CS5, Eclipse, XML, HTML, D-HTML, CSS, JavaScript, JQuery, Ajax, Ruby-on-Rails, Oracle 11i, MySQL
Senior Web Developer
GGP Systems Ltd
09.2008 - 08.2009
- Tech Stack: Silverlight, Flex, Adobe-Air, Cocoa-Touch, Objective-C, C#, Delphi, ASP, Java, JavaScript, Ajax, JQuery, Joomla, osCommerce, WPF, Flex Frameworks (Cairngorm, Mate, and PureMVC), Adobe Creative Suite CS5 (Catalyst, After-Effects, Photoshop & Dreamweaver), HTML, Agile, UML, OOD, CSS, Tortoise SVN, OSMF, ANT, NLPG, IIS, Apache, SQL-Server, Oracle Data Guard and Oracle Spatial.
Business Analyst
SAP-CRM Teleresources Consultancy Ltd
07.2006 - 09.2008
- Tech Stack: SAP-CRM, Sugar-CRM, GoldMine CRM, Data Warehouse, SQL-Server 2005, ASP.NET, XML, Rational-Rose.
Business Development Consultant
Logica-CMG
01.2006 - 07.2006
- Tech Stack: PRINCE-2, VB.NET, ASP.NET, C#, JavaScript, VBScript, SQL, VB6, Visual Studio 2008, Windows Server, Rational-Rose.
Senior Developer
ESP Ltd
10.2002 - 12.2005
SAP-CRM Consultant
MCI WorldCom
10.2000 - 10.2002
Database Administrator
SHL Systems House
01.1998 - 07.1999
Web Consultant
Swiss Bank Corp.
01.1997 - 03.1998
Web Consultant
O-Tel-O
01.1997 - 03.1997
Consultant
DST International
02.1995 - 01.1997
Consultant
C.O.L.T. Ltd
02.1994 - 02.1995
Senior Analyst
Marathon Oil U.K. Ltd
02.1991 - 02.1994
Consultant
Greg Middleton Computing Ltd
04.1990 - 01.1991
Education
Master of Science - Economics, Linguistics & Computing Science
London School of Economics
MPhil - Applied AI
Birkbeck College London
09.2020
Skills
- Agile techniques Rapid app development OOP skills Flex framework knowledge WPF capabilities
- Operating system expertise: HP/UX, Linux, MacOS, Windows Web server technologies: IIS, Apache, WebSphere
- Selenium and Cucumber frameworks Automation using Capybara Rational Rose design modeling Testing-focused development
- Database technologies: PostgreSQL, MongoDB, Oracle, SQL Server, MySQL CRM tools: Salesforce, SAP CRM, Siebel Querying languages: SQL, T-SQL, PL/SQL Data processing methods: OLAP and data warehousing GraphQL and Elasticsearch frameworks Database administration and backup methods: DBA and Oracle Data Guard Stored procedures and functions
- Google Cloud and Azure AWS serverless solutions
- Expertise in petrochemicals and banking Knowledge of telecommunications Technical support skills Media sector experience Start-up experience
Custom Section
https://github.com/itdddjulius
Personal Information
Nationality: BRITISH
References
Available on request
Languages
English
Native
German
Fluent
Romanian
Advanced
Timeline
Senior Sensei
Builder.Ai
11.2022 - 12.2025
Senior Ruby Developer
Kingsbridge Contractor Insurance
01.2022 - 11.2022
Senior Ruby Developer
ChilliBean
01.2020 - 01.2022
DevOps/Block-chain Engineer
Financial Times
04.2019 - 01.2020
Ruby-On-Rails Developer
BigSofa UK
08.2018 - 04.2019
Senior Ruby Developer
Videocall UK
03.2017 - 08.2018
UI/UX Developer
MonitiseCreate UK
08.2014 - 03.2017
UI/UX Developer
GameAccountNetwork UK
03.2014 - 07.2014
UI/UX Manager
Bet365 UK
08.2013 - 03.2014
Senior Dev
GlueReply
09.2011 - 08.2013
Senior Web Developer
Metro Design Consultants
08.2009 - 09.2011
Senior Web Developer
GGP Systems Ltd
09.2008 - 08.2009
Business Analyst
SAP-CRM Teleresources Consultancy Ltd
07.2006 - 09.2008
Business Development Consultant
Logica-CMG
01.2006 - 07.2006
Senior Developer
ESP Ltd
10.2002 - 12.2005
SAP-CRM Consultant
MCI WorldCom
10.2000 - 10.2002
Database Administrator
SHL Systems House
01.1998 - 07.1999
Web Consultant
Swiss Bank Corp.
01.1997 - 03.1998
Web Consultant
O-Tel-O
01.1997 - 03.1997
Consultant
DST International
02.1995 - 01.1997
Consultant
C.O.L.T. Ltd
02.1994 - 02.1995
Senior Analyst
Marathon Oil U.K. Ltd
02.1991 - 02.1994
Consultant
Greg Middleton Computing Ltd
04.1990 - 01.1991
Master of Science - Economics, Linguistics & Computing Science
London School of Economics
MPhil - Applied AI
Birkbeck College London