Senior iOS Engineer (C# Tooling) – Hybrid Role

Egreenservices; Fullerton (CA); Hybrid; USD 107,000 - 160,000; Part time

Benefits offered by this job

Generous PTO

Job summary

Citigroup in Fullerton, CA is seeking an experienced iOS Developer with C# skills for a freelance engagement. The role offers a hybrid office setup, meaningful growth, and a competitive salary range from $107,000 to $160,000 per year.

You will ensure code quality, translate metrics for leadership, and re-architect flows to handle increased load while delivering features from design to production. The team values curiosity and collaboration.

Qualifications

• Hands-on experience with modern relationship-building workflows and tooling.
• Ability to revise strong opinions when the data argues back.
• The patience to mentor without taking over the keyboard.
• Adaptability and resilience when facing shifting requirements.

Responsibilities

• Ensure code quality through automated linting, testing, and static analysis
• Translate C# metrics into the one chart Citigroup leadership checks each morning
• Re-architect the technology flow so Docker handles ten times Fullerton's current load
• Carry features from whiteboard sketch to Fullerton, CA production without dropping the baton
• Cut Presentation Skills cold-start times so Citigroup functions wake before CA users notice
• Drive the Selenium incident postmortem that stops the Fullerton outage from recurring

Skills

Relationship building

Mentoring

Adaptability

Resilience

Job description

Citigroup in Fullerton, CA is seeking an experienced iOS Developer with C# skills for a freelance engagement. The role offers a hybrid office setup, meaningful growth, and a competitive salary range from $107,000 to $160,000 per year.

You will ensure code quality, translate metrics for leadership, and re-architect flows to handle increased load while delivering features from design to production. The team values curiosity and collaboration.