Sr. Software Developer – Application Migration & Modernization ( 102-08SENG-01)
# Sr. Software Developer – Application Migration & Modernization ( 102-08SENG-01) **OpsBrasil Serviços Cloud LTDA** · Sweden · `Remote` · `Contractor` 💼 **Уровень роли:** `Senior` 🕒 **Статус:** *Опубликовано: сегодня* · *Источник: Himalayas (JSON API)* --- ### Top Skills & Match 🎯 **Ключевой стек роли:** `[Software-Development]` `[Application-Migration]` `[Backend-Engineering]` `[.NET-Development]` `[Database-Administration]` `[Senior-Application-Migration-Engineer]` `[Application-Modernization-Engineer]` `[Senior-Application-Developer]` `[Senior-Applications-Developer]` `[Senior-Application-Programmer]` `[Senior-Java-Software-Engineer]` --- ### About the Role This role modernizes legacy .NET applications and their data tiers onto supportable platforms. Most engagements start with a working-but-aging system — a .NET Framework 4.8 application backed by Oracle — and end with something maintainable, scalable, and testable on PostgreSQL RDS with Windows application servers on EC2. This is hands-on engineering with real constraints: production systems that can't go down, undocumented application logic, business logic buried in stored procedures nobody has read in a decade, and a migration that needs to be seamless and invisible to end users. Critically, this is not a database-only migration: the application layer itself must be modified to support PostgreSQL as the backend, not just have its data moved underneath it. Requirements What you will do - Assess existing .NET Framework applications — dependencies, integration points, data access patterns — and produce a realistic modernization plan with sequencing and risk called out. - Modify the application codebase itself to support PostgreSQL as the backend, beyond just migrating the underlying data. - Untangle and port data access layers, including legacy ADO.NET and older Entity Framework code, to current patterns. - Migrate database workloads from Oracle to PostgreSQL: schema conversion, PL/SQL to PL/pgSQL translation, data type and collation mismatches, query rewrites, and performance validation on the target. - Write the tests that make a migration defensible: characterization tests around legacy behaviour, integration tests across the data tier, and automated comparison of old vs. new outputs. - Work directly with client architects, DBAs, and product owners; explain trade-offs in plain language and document decisions so the next person understands them. - Contribute to CI/CD pipelines, deployment automation, and observability for the systems you migrate. - Mentor mid-level developers and review code with an eye on maintainability, not just correctness. Required - 10+ years of professional software development experience, with significant depth in C# and .NET. - Strong, current working knowledge of .NET Framework 4.8 and its legacy stack — ASP.NET MVC/Web API, Web Forms, WCF, IIS, and Windows Services. - Demonstrated experience modernizing or migrating existing applications — not just greenfield development. - Solid relational database skills: writing and tuning SQL, reading execution plans, understanding transaction and isolation behaviour. - Hands-on Oracle experience — PL/SQL, packages, procedures, triggers, sequences — enough to read and reason about business logic living in the database. - Experience with source control, branching strategy, and CI/CD in a team setting (Git, Azure DevOps, GitHub Actions, or similar). - Ability to communicate clearly with non-engineers and to work well when requirements are incomplete. Engagement details - 100% emote - Hourly, full-time commitment - 2-month engagement with the possibility of extension - Open to candidates in Latin America Highlights Tech stack C#, .NET Framework 4.8, ASP.NET MVC, Web API, Web Forms, WCF, IIS, Windows Services, Oracle PL/SQL, PostgreSQL, PL/pgSQL, SQL, Git, CI/CD (Azure DevOps / GitHub Actions), AWS (EC2, RDS) Originally posted on Himalayas
- Software-Development
- Application-Migration
- Backend-Engineering
- .NET-Development
- Database-Administration
- Senior-Application-Migration-Engineer
- Application-Modernization-Engineer
- Senior-Application-Developer
- Senior-Applications-Developer
- Senior-Application-Programmer
- Senior-Java-Software-Engineer
Наблюдалась 2026-10-01, впервые 2026-10-01, источник — Himalayas (JSON API).