Senior Back End Engineer - AWS Open Search

About Us: LTIMindtree is a global technology consulting and digital solutions company that enables enterprises across industries to reimagine business models, accelerate innovation, and maximize growth by harnessing digital technologies. As a digital transformation partner to more than 700+ clients, LTIMindtree brings extensive domain and technology expertise to help drive superior competitive differentiation, customer experiences, and business outcomes in a converging world. Powered by nearly 84,000 talented and entrepreneurial professionals across more than 30 countries, LTIMindtree — a Larsen & Toubro Group company — combines the industry-acclaimed strengths of erstwhile Larsen and Toubro Infotech and Mindtree in solving the most complex business challenges and delivering transformation at scale. For more information, please visit www.ltimindtree.com. Job Title: Senior Back End Engineer – AWS Open Search Location: Mississauga, Ontario, Canada (Onsite) Job Description Role Summary • Need a seasoned backend engineer to design, implement, and operate a semantic search platform on AWS OpenSearch, focusing on vector search, index design/management, and high-throughput APIs. The role requires strong backend development skills in TypeScript, JavaScript, and/or Python. AWS OpenSearch – Detailed Requirements • Cluster Design & Management: Expertise in setting up and scaling • AWS OpenSearch clusters for high availability and performance, shard/replica strategy, cluster sizing, and resource optimization. • Vector Search Implementation: Hands-on experience with k-NN/HNSW algorithms for semantic search and managing vector indices for embeddings-based retrieval. • Index Database Management: Proficiency in creating and maintaining index templates, analyzers, tokenizers, and custom mappings; implement ILM policies for rollover and retention. • Query & Relevance Tuning: Deep knowledge of OpenSearch Query DSL, boosting strategies, hybrid search (BM25 + vector), synonym handling, and multilingual optimization. • Data Ingestion & Pipelines: Build scalable ingestion pipelines for structured/unstructured data and embeddings; integrate with streaming/batch frameworks (Kafka, Kinesis). • Security & Compliance: Configure IAM roles, VPC networking, encryption (at-rest/in-transit), and KMS for key management. • Monitoring & Observability: Implement metrics, logs, dashboards for cluster health and query performance; set up alerts for anomalies and failures. • Backup & Disaster Recovery: Manage snapshot policies, restore procedures, and failover strategies. Key Responsibilities • Design and implement vector search and index management in AWS OpenSearch. • Develop and maintain backend APIs and services using TypeScript, JavaScript, and Python. • Build scalable ingestion pipelines for documents and embeddings. • Ensure performance optimization, observability, and reliability of search services. • Implement security best practices and compliance measures. • Collaborate with cross-functional teams and mentor junior engineers. Required Skills • Strong expertise in AWS OpenSearch including vector search and index management. • Backend development experience in TypeScript, JavaScript, and Python. • Knowledge of distributed systems, caching strategies, and API design. • Experience with CI/CD pipelines and containerization (Docker/Kubernetes). • Familiarity with observability tools and performance tuning techniques. • Understanding of security practices and AWS ecosystem services. Benefits/perks listed below may vary depending on the nature of your employment with LTIMindtree (“LTIM”): Benefits and Perks: Comprehensive Medical Plan Covering Medical, Dental, Vision Short Term and Long-Term Disability Coverage 401(k) Plan with Company match Life Insurance Vacation Time, Sick Leave, Paid Holidays Paid Paternity and Maternity Leave The range displayed on each job posting reflects the minimum and maximum salary target for the position across all US locations. Within the range, individual pay is determined by work location and job level and additional factors including job-related skills, experience, and relevant education or training. Depending on the position offered, other forms of compensation may be provided as part of overall compensation like an annual performance-based bonus, sales incentive pay and other forms of bonus or variable compensation. Disclaimer: The compensation and benefits information provided herein is accurate as of the date of this posting. LTIMindtree is an equal opportunity employer that is committed to diversity in the workplace. Our employment decisions are made without regard to race, color, creed, religion, sex (including pregnancy, childbirth or related medical conditions), gender identity or expression, national origin, ancestry, age, family-care status, veteran status, marital status, civil union status, domestic partnership status, military service, handicap or disability or history of handicap or disability, genetic information, atypical hereditary cellular or blood trait, union affiliation, affectional or sexual orientation or preference, or any other characteristic protected by applicable federal, state, or local law, except where such considerations are bona fide occupational qualifications permitted by law. Safe return to office: In order to comply with LTIMindtree’ s company COVID-19 vaccine mandate, candidates must be able to provide proof of full vaccination against COVID-19 before or by the date of hire. Alternatively, one may submit a request for reasonable accommodation from LTIMindtree’s COVID-19 vaccination mandate for approval, in accordance with applicable state and federal law, by the date of hire. Any request is subject to review through LTIMindtree’s applicable processes.