Full Stack Software Developer- Senior- Onshore
About the role
Hybrid- 3 days a week
Key Outcomes Deliver an Integration Hub/API layer that decouples client apps from PSP specifics and supports REST + webhooks + event-driven messaging.
Enable tokenized payment flows end-to-end (authorization, capture, refund, chargeback)
Stand up secure CI/CD with automated tests/security checks (SAST/DAST), secrets management, and role-based access.
Implement observability (structured logging, metrics, tracing) and performance profiling to meet SLOs.
Contribute to the design and execute migration from legacy DTS tokens to PSP tokens, including retokenization and lifecycle management.
Key Responsibilities
Design, develop, and deploy applications using AWS services such as Amazon API Gateway, Lambda, DynamoDB, and S3.
Build responsive and dynamic front-end interfaces using HTML, CSS, JavaScript, TypeScript, and frameworks like React or Angular.
Implement iframe integration and web components for modular and reusable UI elements.
Develop and maintain backend services, including RESTful API design, webhooks, and integration with third-party systems.
Write clean, maintainable code in TypeScript and Python, and manage version control using GitLab.
Collaborate with DevOps teams to ensure smooth CI/CD pipelines and deployment processes.
Work with NoSQL (e.g., DynamoDB) and SQL databases for data storage and retrieval.
Define API Gateway patterns, versioning, error models, pagination, and idempotency keys.
Ensure application security, PCI Compliance, scalability, and performance optimization.
Collaborate with Architecture, Security, Finance/Treasury, other TS teams, and vendor partners; lead release planning and capacity forecasting.
Prepare and maintain technical specs, threat models, runbooks, and operational dashboards.
Required Skills & Experience Proven experience building application on Cloud: AWS (API Gateway, Lambda, DynamoDB, S3, IAM); serverless and container workloads.
Strong front-end development skills: React or Angular with TypeScript, HTML/CSS for admin/merchant portals.
Backend and integration development experience with REST APIs, webhooks, and integration patterns.
Backend: Proficiency in TypeScript/Node.js and/or Python/Java/Kotlin/Go; RESTful design; clean architecture; DDD.
Integrations: REST, webhooks, message queues; webhook signature verification; idempotency; error handling.
Familiarity with GitLab and DevOps practices.
Experience with NoSQL and SQL databases; schema design; partitioning; performance tuning.
Deep knowledge of OWASP ASVS/Top 10; encryption in transit/at rest; mTLS/OAuth2; API key rotation; short-lived tokens.
Experience with secrets management (vaults), IAM/RBAC, audit logging, data privacy, and secure SDLC (TDD, code reviews, SAST/DAST).
Required experience with monitoring and observability, including structured logging, metric collection, tracing (e.g., OpenTelemetry), performance profiling, and debugging.
Strong problem-solving skills and ability to work in an agile environment.
Nice-to-Have
Hands-on PCI-DSS experience; designing scopes that keep ICN out of PCI
Knowledge of AWS security best practices.
Experience with microservices architecture.
Familiarity with containerization (Docker) and orchestration
Experience with payment gateways/processors (e.g. Moneris, CT Payments, etc.) and chargeback flows.
To Be successful In This Role You Will Need Analytical skills
Ability to work in fast-paced environment
Communication is essential to be integrated in the team
Creativity is always a plus.
Proven past experience on real prod-level projects
Qualifications 8+ years in software development with a track record of building production-grade distributed systems.
Demonstrated leadership in release management, capacity planning, and cross-vendor/customer collaboration.
Agile, Waterfall and/or Hybrid delivery experience; mentoring engineers; driving knowledge sharing.
About W3Global
W3Global is a leading provider of end-to-end consulting services, empowering businesses to achieve their strategic goals and optimize their operations. With over 15 years of experience, we have a proven track record of delivering innovative and effective solutions across a wide range of industries.
Our Mission
At W3Global, we are committed to helping businesses of all sizes achieve their full potential. We believe that by combining our deep industry expertise with our innovative approach, we can deliver exceptional results that exceed our clients' expectations.
Our Services
We offer a comprehensive suite of consulting services designed to address the specific needs of our clients. Our services include:
Strategy Consulting: We help businesses develop and implement winning strategies to achieve their long-term goals.
Business Process Improvement: We identify and optimize business processes to enhance efficiency, reduce costs, and improve customer satisfaction.
Technology Consulting: We provide expert guidance on technology selection, implementation, and integration to support business objectives.
Talent Acquisition: We help businesses find and hire the right talent to support their growth and success.
Human Capital Management: We provide comprehensive HR solutions to help businesses manage their workforce effectively.
Full Stack Software Developer- Senior- Onshore
About the role
Hybrid- 3 days a week
Key Outcomes Deliver an Integration Hub/API layer that decouples client apps from PSP specifics and supports REST + webhooks + event-driven messaging.
Enable tokenized payment flows end-to-end (authorization, capture, refund, chargeback)
Stand up secure CI/CD with automated tests/security checks (SAST/DAST), secrets management, and role-based access.
Implement observability (structured logging, metrics, tracing) and performance profiling to meet SLOs.
Contribute to the design and execute migration from legacy DTS tokens to PSP tokens, including retokenization and lifecycle management.
Key Responsibilities
Design, develop, and deploy applications using AWS services such as Amazon API Gateway, Lambda, DynamoDB, and S3.
Build responsive and dynamic front-end interfaces using HTML, CSS, JavaScript, TypeScript, and frameworks like React or Angular.
Implement iframe integration and web components for modular and reusable UI elements.
Develop and maintain backend services, including RESTful API design, webhooks, and integration with third-party systems.
Write clean, maintainable code in TypeScript and Python, and manage version control using GitLab.
Collaborate with DevOps teams to ensure smooth CI/CD pipelines and deployment processes.
Work with NoSQL (e.g., DynamoDB) and SQL databases for data storage and retrieval.
Define API Gateway patterns, versioning, error models, pagination, and idempotency keys.
Ensure application security, PCI Compliance, scalability, and performance optimization.
Collaborate with Architecture, Security, Finance/Treasury, other TS teams, and vendor partners; lead release planning and capacity forecasting.
Prepare and maintain technical specs, threat models, runbooks, and operational dashboards.
Required Skills & Experience Proven experience building application on Cloud: AWS (API Gateway, Lambda, DynamoDB, S3, IAM); serverless and container workloads.
Strong front-end development skills: React or Angular with TypeScript, HTML/CSS for admin/merchant portals.
Backend and integration development experience with REST APIs, webhooks, and integration patterns.
Backend: Proficiency in TypeScript/Node.js and/or Python/Java/Kotlin/Go; RESTful design; clean architecture; DDD.
Integrations: REST, webhooks, message queues; webhook signature verification; idempotency; error handling.
Familiarity with GitLab and DevOps practices.
Experience with NoSQL and SQL databases; schema design; partitioning; performance tuning.
Deep knowledge of OWASP ASVS/Top 10; encryption in transit/at rest; mTLS/OAuth2; API key rotation; short-lived tokens.
Experience with secrets management (vaults), IAM/RBAC, audit logging, data privacy, and secure SDLC (TDD, code reviews, SAST/DAST).
Required experience with monitoring and observability, including structured logging, metric collection, tracing (e.g., OpenTelemetry), performance profiling, and debugging.
Strong problem-solving skills and ability to work in an agile environment.
Nice-to-Have
Hands-on PCI-DSS experience; designing scopes that keep ICN out of PCI
Knowledge of AWS security best practices.
Experience with microservices architecture.
Familiarity with containerization (Docker) and orchestration
Experience with payment gateways/processors (e.g. Moneris, CT Payments, etc.) and chargeback flows.
To Be successful In This Role You Will Need Analytical skills
Ability to work in fast-paced environment
Communication is essential to be integrated in the team
Creativity is always a plus.
Proven past experience on real prod-level projects
Qualifications 8+ years in software development with a track record of building production-grade distributed systems.
Demonstrated leadership in release management, capacity planning, and cross-vendor/customer collaboration.
Agile, Waterfall and/or Hybrid delivery experience; mentoring engineers; driving knowledge sharing.
About W3Global
W3Global is a leading provider of end-to-end consulting services, empowering businesses to achieve their strategic goals and optimize their operations. With over 15 years of experience, we have a proven track record of delivering innovative and effective solutions across a wide range of industries.
Our Mission
At W3Global, we are committed to helping businesses of all sizes achieve their full potential. We believe that by combining our deep industry expertise with our innovative approach, we can deliver exceptional results that exceed our clients' expectations.
Our Services
We offer a comprehensive suite of consulting services designed to address the specific needs of our clients. Our services include:
Strategy Consulting: We help businesses develop and implement winning strategies to achieve their long-term goals.
Business Process Improvement: We identify and optimize business processes to enhance efficiency, reduce costs, and improve customer satisfaction.
Technology Consulting: We provide expert guidance on technology selection, implementation, and integration to support business objectives.
Talent Acquisition: We help businesses find and hire the right talent to support their growth and success.
Human Capital Management: We provide comprehensive HR solutions to help businesses manage their workforce effectively.