Senior Fullstack Developer

Senior Fullstack Developer
Location
: Baku, Azerbaijan
Type
: Full-time
Company
: DRL LLC
About eiGroup
At eiGroup, we believe ideas can change industries - but only if they are nurtured with structure, science, and courage.
We’re an
R&D and Innovation Venture Studio
that transforms human ingenuity into technological value that scales.
Our ecosystem brings together researchers, engineers, and creators who turn complex challenges into scalable products - from subsurface imaging to AI-driven analytics, from remote sensing to digital transformation.
Our ventures are built in-house, born from research, and grown into independent companies.
Together, we’re shaping how innovation takes root in this region - and how it reaches the world.

What You'll Do

Own the backend: design, build and maintain scalable services and RESTful APIs in C# and <ASP.NET> Core
Build and maintain features in a modern React + TypeScript application: complex editable data grids, charts, and document-style editors
Integrate with, and participate in developing, Python-based AI services
Own application-level architecture — API contracts, module boundaries, data model — participate in solution-level design, and recording the decisions behind it as ADRs
Design the data model and build against a relational database — schema design, ORM, migrations, query optimization and performance tuning
Implement authentication, authorization and role-based access control using Microsoft Entra ID, JWT and OAuth2, including row-level data restrictions
Build real-time and collaborative features using SignalR hubs
Participate in CI/CD, containerization and deployment together with DevOps
Break complex work into deliverable increments, estimate it credibly, and flag risk early
Partner with the Project Manager and domain experts to shape and clarify requirements: surface the edge cases, challenge scope, and propose the cheaper version when there is one
Write unit and integration tests, raise line and branch coverage on the code you own, and keep the CI quality gates — static analysis, linting, type checks — green
Mentor engineers as the team grows — thorough code review, pairing, and setting the standards the codebase is held to
What You Bring
5+ years of professional full-stack experience with a strong backend focus
Strong professional experience with C# and <ASP.NET> Core
Deep understanding of backend architecture — dependency injection, middleware, asynchronous programming, and the trade-offs between them
Proven experience designing and implementing RESTful APIs that other teams consume
Strong experience with relational databases: database design, ORM (e.g. EF Core), query optimisation and performance tuning
Experience with Microsoft Azure — compute, messaging, secrets management and managed identities
Experience with SignalR, message brokers, or comparable messaging and real-time technologies
Experience implementing authentication and authorization with JWT, OAuth2 and Microsoft Entra ID
Solid working knowledge of React and TypeScript, and experience integrating frontends with backend APIs
Experience with Git, CI/CD workflows, and shipping to production regularly
Track record of owning a system end to end — design, build, deploy, operate — not only delivering assigned tickets
Ability to make and defend architectural decisions with incomplete information, and to write them down
Comfortable working in an existing codebase — reading unfamiliar code, deciding what to keep, and refactoring the rest safely
Sound instincts on application security — you recognise an authorization gap or an unsafe default in review
Good written and verbal communication in English, including with non-technical domain experts
Ability to work independently in a fast-paced environment — break down and estimate complex work, prioritise effectively, and raise risks early
Nice to Have
Python and FastAPI
Experience integrating LLM or RAG services into production applications
Experience building analytical, reporting, or business intelligence applications
Experience with offline-first or occasionally-connected applications, and conflict resolution
Experience working with large datasets, data visualisation, or time-series data
Experience with distributed systems and event-driven architecture
Experience with Docker and Kubernetes
Experience mentoring engineers or leading a small team
Domain exposure to energy, oil & gas, or industrial/engineering software
Our benefits include:
Medical insurance (family coverage)
Flexible working hours
Wellness program
Childcare support
Company-provided lunch