Robertas Rudys

Senior Backend Engineer

Senior Backend Engineer

Backend engineer focused on .NET, Go, Kafka, PostgreSQL, Azure, production reliability, performance, and data migrations. Available for full-time senior backend engineering roles.

Contact Robertas View experience Download CV (Backend Engineer)

Selected backend impact

~40%
fewer production error alerts

Measured across Grafana dashboards and Kibana logs in high-scale AdTech production.

Zero downtime
Azure migration

Led a large data-entry platform migration without interrupting users.

3x
higher data resolution

Moved smart-meter ingestion from 15-minute to 5-minute cadence without stability regressions.

~80%
less audit time

Automated Dynamics breaking-change checks and removed manual migration error.

Backend engineering focus

Practical backend work across services, data flows, migration paths, performance, reliability, and production support.

01

Backend services

Build and maintain production backend services in .NET, Go, SQL, Kafka, PostgreSQL, and Azure.

02

Performance and reliability

Improve throughput, reduce production errors, tune consumers, and verify stability with operational metrics.

03

Data and migrations

Refactor database procedures, support higher ingestion rates, and deliver cloud migrations without user disruption.

04

Legacy modernization

Work inside existing systems, improve API contracts, automate migration checks, and reduce manual error.

05

Team delivery

Collaborate with product, QA, operations, and engineering teams to land backend changes clearly and reliably.

High-volume event processing

Removed bottlenecks and improved Kafka consumer performance in multi-region production pipelines.

Adform .NET and Kafka stabilization across multi-region pipelines handling millions of events per hour.

Smart-meter data ingestion

Refactored PostgreSQL procedures to support higher write-load and more frequent ingestion.

Ignitis smart-meter cadence moved from 15 minutes to 5 minutes with no stability regression.

Azure platform migration

Led backend migration work for a large data-entry platform.

Euromonitor Azure migration delivered zero downtime and ~50% faster reporting queries.

Migration automation

Built a .NET CLI for automated breaking-change detection in Dynamics migrations.

Simplanova Dynamics CLI cut manual audit time by ~80%.

Core backend strengths

  • .NET and C# backend development for production systems.
  • Go services, concurrency, testing, and Dockerized prototypes.
  • Kafka event streaming, consumer tuning, and high-volume data paths.
  • PostgreSQL, SQL performance, Azure migrations, observability, and reliability work.

Primary target

Full-time Senior Backend Engineer role on a backend, platform, data, or infrastructure-adjacent team that owns production systems.

Availability: Ready to start within 2–4 weeks.

Location: Kaunas preferred on-site; remote from EU-compatible time zones is possible.

Best fit: teams using .NET, Go, Kafka, PostgreSQL, SQL, Azure, or similar backend stacks.

Role fit

The default fit is a standard full-time backend engineering role with clear production ownership.

Senior Backend Engineer

Backend service development, production support, performance work, and reliable delivery.

Best match for standard HR and recruiter screening.

Platform-adjacent backend

Data paths, internal tooling, API contracts, migrations, observability, and operational workflows.

Best when backend work is close to reliability, data, and deployment concerns.

Performance and reliability

Bottleneck removal, alert reduction, query optimization, and event-pipeline improvements.

Best when the team needs measurable production improvements.

Backend modernization

Legacy code improvement, migration automation, cloud migration, and safer data-flow changes.

Best when existing systems need steady improvement without a rewrite.

Technical match

Concise view of the backend areas most relevant to senior engineering roles.

Capability Experience Recent use Production impact
.NET backend systems ✓ ✓ –
Kafka / event streaming ✓ ✓ –
PostgreSQL / SQL performance ✓ – –
Azure migration work ✓ ✓ –
Go services and concurrency ✓ – –
Production reliability metrics ✓ ✓ ✓

Experience

Selected backend roles and technical work.

The primary CV keeps the same experience in standard resume form for HR and ATS review.

Other profile downloads

The default download is the Senior Backend Engineer CV. Separate documents are available for non-recruiter contexts.

These secondary profiles are intentionally separated so the main hiring path remains clear for HR and recruiter screening.

For consulting engagements

Separate consulting CV for backend reliability, architecture, modernization, and production stabilization work.

Download consulting CV

For startup / builder context

Lightweight builder profile for prototyping, MVP delivery, product engineering, and technical breadth.

Download builder profile

Contact

Email: robertas.rudys@gmail.com

Availability: Ready to start within 2–4 weeks.

Primary target: full-time Senior Backend Engineer roles.

Send the role description, backend stack, location expectations, and hiring timeline.

Best fit for

  • Full-time Senior Backend Engineer roles
  • Backend, platform, data, or infrastructure-adjacent teams
  • .NET, Go, SQL, Kafka, PostgreSQL, or Azure systems
  • Performance, reliability, migrations, and backend modernization

Not a fit for

  • Pure frontend work
  • Roles with no backend or production ownership
  • Strategy-only work without implementation ownership
  • Marketing-led roles that do not involve engineering delivery