Concurrency

Workday

Full-time · Reston, VA · $151,500 – $227,300

This role involves designing and maintaining observability and integration solutions for a federal government platform, working on critical infrastructure that connects thousands of integrations. It suits experienced Java engineers who excel at building scalable, secure systems and want to contribute to high-impact government modernization work.

Listed on Workday’s careers site · Apply there ↗

LSEG

New York, NY · $147,500 – $245,900

LSEG seeks a hands-on Java engineer to design and operate high-performance FX trading platforms, with emphasis on low-latency systems and cloud infrastructure. This role suits experienced developers comfortable with performance optimization, system architecture, and supporting globally distributed teams.

Listed on LSEG’s careers site · Apply there ↗

Citigroup

Full-time · Jersey City, NJ · $176,720 – $265,080

A senior engineering role leading the design and delivery of low-latency electronic trading systems for equities execution, serving traders, quants, and clients across a global platform. Suits experienced technologists who have built high-performance trading systems and can architect complex, multi-team initiatives in fast-paced financial environments.

Listed on Citigroup’s careers site · Apply there ↗

F5

Full-time

F5 is hiring a Senior Rust Developer to build a high-performance proxy solution with both open-source and proprietary components, focusing on systems-level architecture, networking, and async runtime optimization. This role suits experienced systems programmers who excel at low-level performance tuning and want to work on infrastructure technology at scale.

Listed on F5’s careers site · Apply there ↗

Comcast

Chicago, IL · $152,829 – $229,243

A senior C++ engineer role building real-time ad-serving systems that handle millions of concurrent requests across distributed cloud infrastructure. This suits experienced backend engineers comfortable with high-throughput systems, low-latency optimization, and operating at scale in the advertising technology space.

Listed on Comcast’s careers site · Apply there ↗

Amplitude

San Francisco, CA · $165,000 – $276,000

Lead the design and evolution of Amplitude's iOS SDK platform, owning the core Analytics and Session Replay libraries while serving as the iOS expert that other SDK teams depend on. This role suits experienced iOS engineers who care deeply about developer experience and can operate independently across team boundaries to raise the bar for Amplitude's entire mobile ecosystem.

Listed on Amplitude’s careers site · Apply there ↗

LaunchDarkly

Remote - US · $145,500 – $235,400

LaunchDarkly is seeking a backend engineer to build and maintain the core systems that deliver feature flags to customers at scale. This role is ideal for someone with strong production debugging skills and distributed systems experience who wants to deepen their expertise on a senior, learning-focused team.

Listed on LaunchDarkly’s careers site · Apply there ↗

Temporal

Full-time · United States - Remote Opportunity · $176,000 – $237,600

This role owns the design and operation of Temporal's distributed storage layer that manages workflow data at scale across cloud providers. It suits senior engineers with deep expertise in distributed systems who want to lead technical decisions on high-reliability, multi-tenant backend infrastructure.

Listed on Temporal’s careers site · Apply there ↗

Blumberg Portfolio

Full-time · Remote, USA · $126,000 – $197,000

This role leads the technical development of a high-performance trading order management system at a fintech platform handling nearly $9 trillion in assets. It suits an experienced backend engineer who enjoys mentoring teams and designing distributed systems for mission-critical financial workflows.

Listed on Blumberg Portfolio’s careers site · Apply there ↗

Workday

Full-time · Reston, VA · $137,000 – $205,400

This role designs and delivers scalable integration solutions for a cloud platform serving U.S. federal agencies, requiring deep Java expertise and the ability to obtain security clearance. It suits experienced backend engineers who thrive on building robust, highly available systems and want to apply their skills to mission-critical government work.

Listed on Workday’s careers site · Apply there ↗