Job Title: Senior Back-end Engineer

Company Name: Adastra

Job Details: RemoteAll,Commitments,Available

Job Url: https://hiring.cafe/viewjob/3wxub3gn7w73px6a

Job Description: Posted 3d agoSenior Back-end Engineer@ AdastraView All JobsWebsiteMarkham, Ontario, CanadaRemoteAll Commitments AvailableResponsibilities:Design backend APIs, Lead microservices, Architect Azure cloud infraRequirements Summary:Strong experience designing and building backend systems using .NET and microservices; Azure cloud; REST and event-driven APIs; Python for backend/AI; mentoring; CI/CD practices.Technical Tools Mentioned:NET, Azure, API Management, Service Bus, App Services, Python, CI/CD, DevOps
Overview:We are looking for a Senior Back‑end Engineer to design and build scalable, secure, and high‑performance backend systems that power modern SaaS applications. In this role, you will lead the architecture and development of .NET‑based microservices, define APIs that align with frontend workflows, and contribute to cloud‑native solutions on Azure. You will work closely with cross‑functional teams to deliver reliable backend services that support real‑time user experiences, AI‑driven capabilities, and enterprise‑grade platforms. Primary Location: Across Canada or USAWork Model:  Fully RemoteEmployment Type:  ContractorVacancy Status: New RESPONSIBILITIESDesign and implement scalable backend architectures supporting frontend SaaS applications using .NET microservicesDefine and maintain API contracts aligned with frontend workflows and UI data requirementsLead the design of microservices for knowledge base management, agent configuration, integrations, and chat servicesArchitect and implement secure authentication and authorization services using enterprise identity solutionsBuild high‑availability REST and event‑driven APIs to support real‑time user interactionsDesign and maintain Azure‑based cloud infrastructure including App Services, API Management, Service Bus, and storage solutionsDevelop Python‑based services for AI model orchestration, data processing, and retrieval‑augmented generation pipelinesImplement scalable services for conversation history and context managementEstablish CI/CD pipelines and DevOps practices for microservices deploymentEnsure system observability through logging, monitoring, and distributed tracingDefine backend performance optimization strategies and caching mechanismsMentor backend engineers and promote architectural best practicesQUALIFICATIONS, SKILLS & EXPERIENCEStrong experience designing and building backend systems using .NET and microservices architecturesExperience designing and consuming REST and event‑driven APIsHands‑on experience with Azure cloud services and cloud‑native architecturesProficiency in backend API design, scalability, and performance optimizationExperience with authentication and authorization in enterprise environmentsWorking knowledge of CI/CD pipelines and DevOps practicesExperience with Python for backend services, data processing, or AI‑related workloadsAbility to collaborate effectively with frontend engineers, architects, and product teamsExperience mentoring engineers or providing technical leadershipNICE TO HAVEExperience working with AI platforms, model orchestration, or RAG pipelinesFamiliarity with distributed systems observability tools and practicesExperience designing real‑time or conversational systemsExposure to large‑scale SaaS or enterprise platformsExperience with Retrieval-Augmented Generation (RAG) patterns for AI-driven applicationsABOUT ADASTRAAdastra is a global leader in AI and data-driven transformation, helping organizations lead with artificial intelligence—responsibly, strategically, and at scale. With over 25 years of experience, Adastra empowers enterprise clients to unlock business value through data innovation, operational excellence, and smart customer engagement.  Trusted by some of the world’s most prominent brands, Adastra delivers end-to-end solutions grounded in thoughtful strategy, robust governance, and deep technical expertise. From defining vision to ensuring execution, Adastra guides organizations through every stage of their AI, data and cloud journey—building future-ready capabilities and delivering measurable, lasting impact.  Adastra serves clients across key industries including financial services, automotive, manufacturing, technology, media and telecom (TMT), healthcare, retail, and professional services. The company employs more than 2,000 professionals across North America, Europe, and Asia. WHAT WE OFFEROpportunity for advancement and career progressionCompetitive compensationSuccessful referral programThe opportunity to work with one of Canada’s 50 Best Managed CompaniesSatisfaction of working for a reputable company A flexible, dynamic, and diverse workplaceEQUAL OPPORTUNITY EMPLOYERIn our commitment to promote fair and equitable treatment of all employees and applicants, Adastra Corporation provides equal employment opportunities for all individuals regardless of age, sex, disability, race, ethnic origin, citizenship, creed, sexual orientation, marital status, or any other ground as described in the Ontario Human Rights Code.  In addition, accommodation will be provided during the hiring process. Adastra Corporation’s implementation and support of employment initiatives, encourage diversified labour force participation and equal access to opportunities based on merit and performance. AI Usage - Our hiring process includes the use of AI-enabled tools to screen applications (e.g., keyword matching, qualification ranking). A human recruiter reviews all AI-generated shortlists to make informed hiring decisions.There has been an increased instance of fraudulent job offers coming from people posing as Adastra HR employees. Please note that Adastra will never request fees as part of our recruiting process and any emails sent to you that are not from ‘@adastragrp.com’ or ‘@talent.icims.com’ are fraudulent. All employment offers are sent via DocuSign and if you receive an employment offer from a suspicious email and not via DocuSign, it is fraudulent. Contact careers@adastragrp.com to inquire about jobs at Adastra, to report a suspicious request for money or personal information from external websites or suspicious employment offers.