RAPHAEL ABBRACX TANKO
Sangotedo
Summary
Results-driven Senior Software Engineer, known for high productivity and efficient task completion. Specialize in algorithm design, cloud computing, and database management, ensuring quality development and deployment of software solutions. Excel in problem-solving, teamwork, and adaptability, leveraging these skills to navigate complex project requirements, and deliver innovative products.
Overview
4
4
years of professional experience
3
3
Certifications
Work History
Co-Founder & Technical Developer
ApexpressGo
Abuja, Nigeria
07.2025 - Current
- Represented the company in investor pitches and client meetings, translating technical value propositions into business outcomes that secured initial funding and partnerships.
- Developed technical roadmaps from business requirements, ensuring platform scalability to support projected user growth.
- Made architectural decisions that balanced development speed with long-term maintainability, enabling rapid feature iteration without compromising stability.
- Optimized AWS spend and managed technical resources, achieving 40% reduction in operational costs compared to industry benchmarks for similar platforms.
Backend/ QA Automation Engineer
Peerless
Victoria Island, Nigeria
04.2025 - Current
- Developed and maintained RESTful APIs that processed over 10,000+ daily transactions with 99.9% uptime for critical banking applications, ensuring reliable and secure financial operations.
- Automated performance testing for web applications, reducing manual testing efforts by 30% and accelerating release cycle speed by 25%.
- Deployed and scaled microservices on Kubernetes clusters, increasing system availability across multiple regions by 99.95% and supporting a 3x increase in user load without performance degradation.
- Managed cloud infrastructure with Terraform and Ansible, cutting provisioning time by 60% and achieving 15% savings in monthly cloud costs through resource optimization.
- Implemented security protocols that reduced vulnerability incidents by 40% and enhanced data protection compliance with PCI-DSS and CBN guidelines.
- Designed and documented database schemas, enhancing query performance by 35% and facilitating seamless onboarding.
- Collaborated with DevOps teams to establish CI/CD pipelines that reduced deployment failures by 50% and accelerated time-to-market for new features.
Software Engineer (Lead Developer)
Pistis Tech Hub
Ibadan, Nigeria
01.2024 - 01.2025
- Led the end-to-end development and deployment of an e-learning platform using Python and Digital Ocean Droplet supporting over 100+ active users with 90.0% uptime and seamless content delivery.
- Integrated secure payment gateways into platform, facilitating seamless subscription management and secure monthly transaction processing.
- Managed CI/CD pipelines using GitHub Actions , reducing deployment cycles from weekly to daily and increasing team deployment confidence by 40%.
- Mentored and coordinated a cross-functional development team through Agile practices, improving sprint velocity by 25% and ensuring on-time delivery of all major milestones.
- Built and scaled containerized services using Docker and ECS, enhancing resource utilization and enabling smooth horizontal scaling during peak usage.
- Translated business and user requirements into scalable technical solutions, breaking down epics into sprint tasks that accelerated product iteration and aligned stakeholders.
Software Developer
Access Bank PLC
Lagos, Nigeria
07.2022 - 12.2024
- Designed and implemented automation solutions using ProcessMaker, Power Automate, and .NET/C#, reducing manual processing time by 60% across core banking workflows including customer onboarding and loan processing.
- Collaborated with cross-functional teams to identify automation opportunities, resulting in the successful automation of 15+ business processes that saved approximately 2,500+ staff hours annually.
- Supported core banking modernization initiatives by automating data migration and validation processes, ensuring seamless transition for 2+ million customer records with 99.9% data accuracy.
- Contributed to digital lending automation, streamlining credit assessment workflows that facilitated issuance of 2.4 million digital loans during tenure.
- Established automation frameworks and methodology, creating reusable components that accelerated future automation projects and served as a reference for the bank's automation center of excellence.
- Analyzed requirements documents and developed comprehensive test cases, achieving 95% test coverage for automated workflows and reducing post-deployment defects by 40%.
- Conducted audits of automated systems, ensuring compliance with CBN regulations and industry standards while maintaining documentation for regulatory reporting.
Software Engineer, Backend (Contract)
zarttech
11.2023 - 06.2024
- Designed and implemented core product architecture using Python and Django, creating a scalable foundation that supported future feature development.
- Developed RESTful APIs integrated with AWS services, ensuring high uptime and facilitating seamless scalability during traffic fluctuations.
- Automated infrastructure provisioning using configuration management tools, reducing environment setup time from days to hours and ensuring consistency across all deployment stages.
- Implemented containerization technologies including Docker and Kubernetes, accelerating delivery cycles by 40% and enabling seamless horizontal scaling during traffic spikes.
- Developed systems automation scripts using Python and Bash, eliminating manual server maintenance tasks per week and reducing human error rates.
- Established a robust data synchronization pipeline for customer accounting across multiple platforms using Zero and QuickBooks, reducing reconciliation errors by 45% and saving 20+ hours of manual accounting work per week.
- Configured accounts payable and receivable systems by leveraging Monite and Codat, streamlining financial operations and improving payment processing efficiency by 35%.
- Prepared comprehensive reports and presentations for management, delivering data-driven insights that guided product roadmap decisions and optimized resource allocation.
Software Engineer, FullStack (Contract)
Offscript
08.2022 - 12.2022
- Developed backend services using Hasura GraphQL and Node.js for a microservices architecture, enabling real-time data queries that reduced API response times by 35% and improved overall system efficiency.
- Engineered serverless deployment pipelines using AWS Lambda, reducing infrastructure costs by 30% through efficient pay-per-execution model while maintaining 99.9% availability.
- Integrated GraphQL APIs with frontend components, optimizing data fetching and reducing payload size by 50%, enhancing mobile performance.
- Built responsive front-end applications using React and Next.js, improving user experience and contributing to a 25% increase in user retention through faster page loads and intuitive interfaces.
- Translated design prototypes into functional JavaScript components, delivering 95% design fidelity and reducing development handoff time by 40%.
- Collaborated on full-stack development initiatives, enhancing frontend and backend codebases to accelerate feature delivery by 20%.
- Leveraged Shopify to establish e-commerce stores for affiliate marketers, enabling 15+ clients to launch online stores within 2 weeks, generating over $10,000 in revenue.
- Documented API endpoints and system architecture, facilitating knowledge transfer and enabling seamless handover to international team members across different time zones.
Software Engineer, Backend
Herconomy
01.2022 - 06.2022
- Developed and maintained backend services using Python/Django for a women-focused fintech platform, supporting 1,000+ active users with secure and reliable financial operations.
- Automated cloud resource health checks through Python scripts, reducing manual monitoring time by 60% and enabling proactive detection of 15+ potential issues before they impacted users.
- Collaborated on frontend development with React, enhancing responsive UI components to boost user engagement by 20% across key platform features.
- Assisted in AWS infrastructure management, maintaining 99.8% uptime for critical financial services through effective cloud resource configuration.
- Participated in deployment health monitoring, implementing automated alerts that reduced mean time to detection (MTTD) for system issues by 40%.
- Supported transition to microservices architecture, increasing system modularity and decreasing feature deployment time by 30%.
- Collaborated using ClickUp for project management, contributing to 90%+ sprint completion rates through clear task tracking and timely delivery of assigned features.
Education
Bachelor of Science - Computer Science
University of Jos
Jos, Plateau07-2018
Skills
- Data Science
- Python and Pydantic
- Data modeling
- Data warehousing
- SQL and NoSQL
- Nodejs and TypeScript
- Django Ninja
- Kubernetes
- AWS/Google Cloud
- Linux
- System Administration
- Scripting automation
- Blockchain integration
- Agile development
- Project Management
Certification
Scrum Fundamentals Certified
References
- Dr. Yinka Overinde, HOD, Department of Computer Science, University of Jos, oyerindeo@unijos.edu.ng, 08037011799
- Dr. Sunday Didam Audu, Babcock University, Ogun State, audus@babcock.edu.ng, 08036638812
Timeline
Co-Founder & Technical Developer
ApexpressGo
07.2025 - Current
Backend/ QA Automation Engineer
Peerless
04.2025 - Current
Software Engineer (Lead Developer)
Pistis Tech Hub
01.2024 - 01.2025
Software Engineer, Backend (Contract)
zarttech
11.2023 - 06.2024
Software Engineer, FullStack (Contract)
Offscript
08.2022 - 12.2022
Software Developer
Access Bank PLC
07.2022 - 12.2024
Software Engineer, Backend
Herconomy
01.2022 - 06.2022
Bachelor of Science - Computer Science
University of Jos