We are looking for a
Principal Software Engineer
to own the technical vision, architecture, and long-term health of our core business systems. You will design scalable, secure, and cost-effective solutions primarily built on
AWS cloud-native services
,
.NET
backend ecosystem,
Oracle PL/SQL
for data-heavy logic, and
Metabase
for analytics & self-service BI.
This is a senior-most hands-on architecture role — you will combine deep technical expertise with strategic thinking, mentor senior engineers, make trade-off decisions that affect millions in cloud spend and developer productivity, and ensure the system remains evolvable for the next 5–10 years.
Key Responsibilities
Define and evolve the
overall technical
and reference designs for mission-critical systems (microservices, event-driven patterns, data pipelines, reporting layer)
Lead end-to-end architectural decisions across
AWS
(multi-account strategy, landing zone, networking, security posture, cost governance, disaster recovery)
Design high-performance
.NET
(C#/.NET 6+) backend services — REST/GraphQL APIs, background workers, domain-driven design, clean/hexagonal architecture
Architect data-intensive components using
PL/SQL
in Oracle databases — complex stored procedures, performant batch processing, data modeling, partitioning, materialized views
Own the
analytics & BI architecture
— integrate
Metabase
with data sources (RDS, Redshift, S3/Parquet, Athena), design semantic layers, govern self-service analytics access, optimize query performance
Create and maintain architectural runway: patterns, decision records (ADRs), reference implementations, golden paths for developers
Conduct architecture reviews, threat modeling, and deep-dive technical due-diligence for major initiatives
Collaborate closely with engineering managers, product managers, security, DevOps, and data teams to align architecture with business priorities
Drive modernization initiatives (e.g. lift-and-shift → cloud-native, monolith → microservices, legacy PL/SQL → hybrid serverless patterns)
Establish and enforce engineering excellence standards: observability (CloudWatch + X-Ray + custom metrics), CI/CD, IaC (Terraform/CDK/.NET), automated testing pyramid, security by design
Mentor Staff/Senior engineers and lead communities of practice (architecture guild, .NET/AWS/Oracle chapters)
Keep abreast of AWS Well-Architected Framework updates, .NET ecosystem evolution, Oracle database advancements, and BI tooling trends
Required Qualifications & Experience
12+ years of software engineering/architecture experience, with at least 5 years in a
principal/senior or
equivalent role
Deep hands-on expertise in
AWS
(certifications like Solutions Architect Professional / DevOps Engineer Professional highly desirable) Strong experience with: ECS/EKS/Fargate, Lambda, API Gateway, SQS/SNS/EventBridge, RDS (Oracle/SQL Server), Aurora, S3, Glue, Athena, Step Functions, IAM, Organizations/SCPs, CloudFormation/CDK/Terraform
Very strong
.NET
background — modern .NET 6/7/8, ASP.NET Core, Entity Framework Core, Minimal APIs, gRPC, worker services, DDD/CQRS patterns
Expert-level
PL/SQL
& Oracle Database design & tuning experience (10+ years preferred) Performance optimization, bulk processing, advanced indexing, partitioning, PL/SQL unit testing
Practical experience integrating & extending
Metabase
in production environments (data source connectors, permissions model, embedding, caching, query governance)
Proven track record designing systems that handle high transaction volume, large datasets, and strict SLAs (99.9%+ uptime)
Strong understanding of distributed systems challenges, eventual consistency, CAP theorem trade-offs, saga/orchestration patterns
Experience with infrastructure-as-code, GitOps, and modern DevOps practices
Morningstar is an equal opportunity employer
Morningstar's hybrid work environment gives you the opportunity to collaborate in-person each week as we've found that we're at our best when we're purposely together on a regular basis. In most of our locations, our hybrid work model is four days in-office each week. A range of other benefits are also available to enhance flexibility as needs change. No matter where you are, you'll have tools and resources to engage meaningfully with your global colleagues.
I10_MstarIndiaPvtLtd Morningstar India Private Ltd. (Delhi) Legal Entity
