2+ Legacy systems Jobs in Hyderabad | Legacy systems Job openings in Hyderabad

The ideal candidate has strong hands-on expertise in C# and legacy .NET frameworks (WinForms/WPF and ASP.NET Web Forms/MVC), with solid experience in Oracle SQL and PL/SQL (complex queries, packages, triggers, performance tuning) and working knowledge of SQL Server for reporting and analytics. They are comfortable working in on-premises, Windows-based environments with multi-tier client/server architectures, scheduled jobs, and batch processes, and can collaborate closely with DBAs and infrastructure teams.

The candidate should be highly capable of reverse engineering large, legacy codebases with limited documentation, tracing end-to-end flows across UI, business logic, data access, and database layers, and performing thorough impact analysis before making changes. Strong debugging skills (logs, profilers, Visual Studio), experience handling business-critical production incidents (L2/L3), and familiarity with version control (Git/TFS) and ITSM tools (e.g., ServiceNow, JIRA) are essential. Experience with Information / lab / quality / operations systems or similar complex transactional applications is a strong plus.

Location

Offshore (India) – Hybrid as per client policy

Work Timings

Flexible timings with willingness to support overlapping hours with US time zones (including occasional off-hours / weekend support as needed).

Role Summary

We are looking for an experienced Application Developer & Support Engineer to maintain, enhance, and support a suite of business-critical legacy applications. These include:

• A long-running Laboratory Information System used for environmental and analytical testing.
• Desktop .NET client applications used for managing organic and inorganic test workflows, sample results, and quality checks.
• A project/operations dashboard that consolidates lab/project performance data from Oracle and SQL Server for reporting.
• Web applications (on-prem .NET) used for lab data preparation, operational workflows, and internal employee/HR information.

All applications are on-premises, using Oracle as the primary transactional database (with some SQL Server reporting), and have complex, tightly coupled code and data flows that must be understood and handled carefully.

The role is a mix of development, enhancement, deep troubleshooting, and L2/L3 production support, with strong emphasis on reverse engineering complex legacy systems and ensuring stability.

Technical Capabilities & Competencies

Core Technical Skills

• Strong experience with C# and .NET (legacy frameworks such as .NET Framework, WinForms/WPF and classic ASP.NET Web Forms / MVC).
• Solid expertise in Oracle Database:
• Advanced SQL (joins, analytical functions, performance-oriented queries).
• PL/SQL (procedures, functions, packages, triggers).
• Understanding of indexing, execution plans, and query tuning.
• Working knowledge of SQL Server and its use for reporting / analytics.
• Comfort working in on-premise environments with Windows servers, application servers, and database servers.

Complex Code & Flow Handling

• Proven experience in reverse engineering large, legacy codebases with limited or outdated documentation.
• Ability to understand and trace multi-layered architectures (UI, business logic, data access, database) and dependencies between modules.
• Strong debugging skills:
• Using Visual Studio debuggers, logs, and profilers to trace issues across layers.
• Diagnosing intermittent production issues (e.g., race conditions, memory leaks, connection pool issues, timeouts).
• Experience analyzing complex stored procedures and PL/SQL packages to understand business rules implemented at the database layer.
• Capability to perform impact analysis before changing shared components in heavily reused libraries or database objects.

Integration & Architecture Awareness

• Understanding of client–server architectures, multi-tier applications, and on-prem network constraints.
• Familiarity with file-based integrations, scheduled jobs, and batch processes commonly used in legacy systems.
• Basic understanding of authentication/authorization patterns in legacy .NET apps and on-prem environments (Windows auth / forms auth, etc.).

Engineering Practices & Tools

• Hands-on experience with version control systems (Git, TFS, Azure DevOps or similar).
• Familiarity with work management and ITSM tools (JIRA, ServiceNow, Azure DevOps Boards, etc.) for incidents, problems, and changes.
• Exposure to CI/CD or at least automated build/deployment pipelines for .NET applications (nice to have for future modernization).

Key Responsibilities

Application Development & Enhancements

• Analyze functional and technical requirements for enhancements across lab workflow, operational dashboard, and internal web portals.
• Design, develop, and unit test new features, reports, and UI changes using C#, .NET (legacy frameworks), Oracle SQL/PL-SQL, and related technologies.
• Refactor and optimize legacy modules while preserving existing behavior and ensuring regression-free delivery.
• Participate in code reviews and ensure adherence to coding standards and secure coding practices.

Production Support & Incident Management

• Provide L2/L3 support for incidents, problems, and service requests across all applications in scope.
• Perform end-to-end analysis of issues (UI → business logic → data access → database) using logs, profilers, and SQL analysis.
• Perform root cause analysis for recurring problems and propose long-term fixes, not just workarounds.
• Work within defined SLAs for impact assessment, communication, and resolution, including handling priority incidents during non-standard hours if required.

Database & Reporting

• Develop and maintain Oracle SQL/PL-SQL objects (views, procedures, packages, triggers) used by the applications and reports.
• Support SQL Server–based reporting components, ensuring consistent data between Oracle transactional systems and reporting layers.
• Work with DBAs to investigate performance bottlenecks (slow queries, blocking, indexing, statistics, etc.).

Release & Change Management

• Prepare deployment packages, change scripts, and release notes for application and database changes.
• Coordinate promotion of changes across Dev / Test / Prod environments in line with change management processes.
• Use version control (Git/TFS or similar) for branching, merging, and maintaining stable baselines.

Stakeholder Collaboration & Documentation

• Work closely with onsite IT teams, business users, QA, and operations teams to clarify requirements and validate solutions.
• Document technical design, data flows, configuration details, and support runbooks for complex modules.
• Provide knowledge transfer and onboarding support to other team members as needed.

Required Experience

• 5–8+ years of experience in Application Development & Support in enterprise environments.
• Demonstrated experience in supporting long-running, business-critical legacy systems with complex business logic and data flows.
• Experience working in distributed onsite–offshore models with overlapping hours to US teams.

Position of the role

The Principal Engineer reports to the Domain Lead and plays a key role in driving the technical vision, strategy, and execution of development initiatives. The Principal Engineer collaborates with multiple teams to ensure that software solutions are scalable, cost-optimized, performant, and aligned with business objectives.

Result expectation in terms of result areas and core activities

The Principal Engineer is responsible for defining, designing, and overseeing the implementation of complex software solutions. This role involves deep technical expertise, mentorship, and architectural guidance across multiple teams. The Principal Engineer also acts as a thought leader, influencing technology choices, best practices, and innovation within the organization.

Main objectives of the role

✔ Leading the design and architecture of the software by following best practices that ensure scalability, maintainability, cost optimization, and high performance.

✔ Driving innovation and continuous improvements in software development practices.

✔ Providing technical mentorship and coaching to engineers across teams.

✔ Ensuring the successful delivery of high-quality software aligned with business requirements.

✔ Defining and maintaining coding standards, best practices, and governance frameworks.

✔ Collaborating with product management and other stakeholders to shape the technical roadmap.

✔ Identifying technical debt and implementing strategies to mitigate it effectively.

✔ Promoting a culture of continuous learning, knowledge sharing, and cross-team collaboration.

✔ Leading DevOps, CI/CD, and automation to improve software delivery processes and efficiency.

Specialisation

✔ Deep understanding of software architecture, system design, and performance optimization.

✔ Translating complex business requirements into scalable and efficient software solutions.

✔ Handling large data transformations and ensuring system efficiency under the required load conditions.

✔ Leading initiatives for modernizing the technology stack and implementing best practices.

✔ Ensuring that security, scalability, and maintainability are embedded into development processes.

✔ Driving research and development efforts to explore emerging technologies and their business impact.

✔ Enabling teams to develop and maintain high-quality software through code reviews, architecture guidance, and technical strategy.

✔ Collaborating with product owners and stakeholders to ensure that development aligns with business goals and user needs.

Key processes in the role

✔ Agile / Scrum / Kanban development methodologies.

✔ CI/CD and DevOps practices to streamline delivery.

✔ Cloud-native architecture, monolith and microservices-based development.

✔ Scalable and high-performance computing strategies.

✔ Secure software development lifecycle (SDLC).

✔ Data-driven decision-making.

✔ Performance optimization.

Key relationships (teams and/or position titles)

✔ Engineering Teams (Developers, QA, DevOps).

✔ Head of Engineering and Technology Leadership.

✔ Product Management and Business Stakeholders.

✔ Customer Success and Solution Architects.

✔ External Technical Partners and Vendors.

Requirements

✔ Bachelor's or Master’s degree in Computer Science, Software Engineering, or a related field.

✔ 10+ years of experience in software development, with a proven track record .

✔ Strong experience in Python and modern software engineering practices.

✔ Expertise in cloud computing platforms (AWS, Azure, or GCP).

✔ Experience in architecting and developing scalable, high-performance applications.

✔ Hands-on experience with CI/CD pipelines, DevOps tools, and automation.

✔ Deep understanding of microservices, monolith, APIs, and distributed systems.

✔ Strong experience with database technologies, including SQL and NoSQL.

✔ Excellent communication and leadership skills, with the ability to influence technical decisions across teams.

✔ A passion for mentoring, coaching, and fostering a strong engineering culture.

✔ Experience in defining and implementing technical governance and best practices.

Competences

✔ Strategic Thinking - 4

✔ Analytical Problem Solving - 4

✔ Technical Leadership & Mentorship - 4

✔ Communication & Collaboration - 3

Measures of success

✔ Technical leadership impact - measurable improvements in code quality, architecture, and scalability.

✔ Delivery of high-quality software within agreed timelines and business requirements.

✔ Successful mentorship - improvement in team skill levels, problem-solving capabilities, and innovation.

✔ Reduction of technical debt through strategic refactoring and modernization.

✔ Engineering team satisfaction - based on feedback and collaboration effectiveness.

✔ Improvements in system performance, stability, cost-optimization, and security.

✔ Adoption of best practices and emerging technologies across teams.

✔ Contribution to company-wide strategic initiatives through technical innovation and leadership.