We are looking for a highly skilled Integration Developer (IBM ACE) combined with strong expertise as a Senior BigCommerce Developer to build scalable, API‑driven, cloud‑ready integration and eCommerce solutions across global enterprise platforms. Key ResponsibilitiesIntegration (IBM App Connect / ACE)Design and develop cloud‑ready and hybrid integrations using IBM ACE / IIB.Build REST APIs, event‑driven services, and asynchronous integrations.Implement patterns such as API‑led connectivity, pub/sub, and event streaming.Integrate systems via messaging (MQ/JMS), APIs, file transfer, and streaming.Support CI/CD, automated deployments, and infrastructure‑aware design.Collaborate with architects and cross‑functional teams (Cloud, DevOps, Security).Ensure scalability, security, resilience, and observability.BigCommerce (B2B eCommerce)Develop and enhance BigCommerce B2B solutions (custom pricing, multi‑level roles, account management).Implement bulk ordering, reordering, RFQ, tax workflows, and advanced B2B flows.Customize checkout, payments, and shipping provider integrations.Build integrations using APIs, webhooks, and GraphQL.Work on headless BigCommerce implementations with custom front‑ends. Required SkillsIntegrationStrong hands‑on experience with IBM ACE / IIB.Expertise with ESQL, DFDL, REST/SOAP, JSON, XML, XSLT, MQ, JMS, HTTP/S.Knowledge of cloud platforms (AWS) and cloud‑native APIs.Java programming and scripting; Git‑based workflows.Experience designing integrations for HA, scalability, and fault tolerance.BigCommerceBachelor’s degree in Computer Science or equivalent.Strong proficiency with BigCommerce (Stencil, Storefront API, Admin API).B2B knowledge: customer groups, pricing rules, catalog segmentation, RBAC.Front‑end: HTML5, CSS3, JS (ES6+), React.Node.js is a plus.Experience integrating with Salesforce, SAP.Strong communication and problem‑solving skills. Nice to HaveACE/IIB certifications.Experience with MuleSoft, ETL, or data integration tools (Informatica).Unix/Linux and shell scripting.Experience in large global enterprise environments.>>>What do we offer?TCS Benefits – Brazil:Health insuranceDental PlanLife insuranceTransportation vouchersMeal/Food VoucherChildcare assistanceGympassTCS Cares – free 0800 that provides psychological assistance (24 hrs/day), legal, social and financial assistance to associatesPartnership with SESCReimbursement of CertificationsFree TCS Learning Portal – Online courses and live trainingInternational experience opportunityDiscount Partnership with Universities and Language SchoolsBring Your Buddy – By referring people you become eligible to receive a bonus for each hireTCS Gems – Recognition for performanceXcelerate – Free Mentoring Career PlatformTata Consultancy Services is an equal opportunity employer, our commitment to diversity & inclusion drives our efforts to provide equal opportunity to all candidates who meet our required knowledge & competency needs, irrespective of any socio-economic background, race, color, national origin, religion, sex, gender identity/expression, age, marital status, disability, sexual orientation or any others. We encourage anyone interested to build a career in TCS to participate in our recruitment & selection process.At Tata Consultancy Services we promote an inclusive culture, we always work for equity. This applies to Gender, People with Disabilities, LGBTQIA+, Religion, Race, Ethnicity. All our opportunities are based on these principles. We think of different actions of inclusion and social responsibility, in order to build a TCS that respects each person. Our motto is Inclusion without exception.At TATA Consultancy Services we promote an inclusive culture, we always work for equity. This applies to Gender, People with Disabilities, LGBTQIA+, Religion, Race, Ethnicity. All our opportunities are based on these principles. We think of different actions of inclusion and social responsibility, in order to build a TCS that respects individuality. Come to be a TCSer!