Jobs in the United States

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Added 1 min ago
Cloud Engineer
Maximus
Hartford, CT
Consult with engineering staff to support hardware, software, operational and performance requirements of overall cloud technology system.
Added 1 min ago
Lead AI and Data Science Engineer II- Marketing Measurement
Deloitte
Hartford, CT · Stamford, CT
AI & Engineering leverages cutting-edge engineering capabilities to build, deploy, and operate integrated solutions across software, data, AI, networks, and cloud infrastructure. These…
Added 3 mins ago
BizOps – GTM & Monetization
Nominal
NY
: the software and AI layer that hardware engineering teams use to simulate, test, manufacture, and operate the physical systems that keep the world moving, from spacecraft and autonomous…
Added 8 mins ago
IT Product Developer II, III, IV
Williams Companies
Tulsa, OK
A s a Product Engineer at Williams, you will play a critical role in designing and delivering in ‑ house software products that directly support our business. This role goes beyond…
Added 8 mins ago
IT Product Developer II, III, IV
Williams Companies
Tulsa, OK
As a Product Engineer at Williams, you will play a critical role in designing and delivering in‑house software products that directly support our business. This role goes beyond traditional…
Added 8 mins ago
Lead AI and Data Science Engineer II- Marketing Measurement
Deloitte
Tulsa, OK
AI & Engineering leverages cutting-edge engineering capabilities to build, deploy, and operate integrated solutions across software, data, AI, networks, and cloud infrastructure. These…
Added 9 mins ago
Cloud Engineer
Maximus
Oklahoma City, OK
Consult with engineering staff to support hardware, software, operational and performance requirements of overall cloud technology system.
Added 20 mins ago
Electrical Engineer II (Engineer to Orde
FAITH TECHNOLOGIES INC
MENASHA, WI
Added 21 mins ago
Software Engineer II
JAMF SOFTWARE LLC
EAU CLAIRE, WI
Added 21 mins ago
Automation Engineer II
Milwaukee Tool
Menomonee Falls, WI
…People and our Culture are the secrets to our success. Our Engineering teams are key contributors to continuous innovation, delivering disruptive technologies through direct engagement with…
Added 21 mins ago
Cloud Engineer
Maximus
Madison, WI
Consult with engineering staff to support hardware, software, operational and performance requirements of overall cloud technology system.
Added 21 mins ago
Systems Analysts II
ISR INFO WAY INC
MADISON, WI
…Master\'s degree or foreign equivalent degree in Computer Science, Engineering (any), Information Technology, Business or related plus 12 months of experience in the job offered or as a…
Added 21 mins ago
Software Engineers II
ISR INFO WAY INC
MADISON, WI
JOB REQUIREMENTS: Software Engineers II, Madison WI area. Collect/analyze business reqs. Design, develop, modify software systems. Travel to various unantic US locations. Some job duties…
Added 21 mins ago
Electronic Test Technician II
TRAFFIC AND PARKING CONTROL CO INC
MILWAUKEE, WI
Added 21 mins ago
Electronic Test Technician II
TRAFFIC AND PARKING CONTROL CO INC
MILWAUKEE, WI
Added 21 mins ago
Lead AI and Data Science Engineer II- Marketing Measurement
Deloitte
Milwaukee, WI
AI & Engineering leverages cutting-edge engineering capabilities to build, deploy, and operate integrated solutions across software, data, AI, networks, and cloud infrastructure. These…
Added 35 mins ago
TT
Senior Security Engineer
True Talent Solutions Partners
San Francisco, CA
- $190,000 to $250,000 USD / year
- Build and mature application security tooling, processes, and secure SDLC practices that fit naturally into engineering workflows.
Added 37 mins ago
Software Development Engineer II - Regression Infrastructure, Trainium Manufacturing Infrastucture
Annapurna Labs (U.S.) Inc.
Austin, TX · Cupertino, CA
Our Annapurna Labs team at Amazon is looking for a Software Development Engineer to own the regression infrastructure that every manufacturing software release depends on. Before new test…
Added 51 mins ago
People Business Partner - Growth
Nominal
United States
: the software and AI layer that hardware engineering teams use to simulate, test, manufacture, and operate the physical systems that keep the world moving, from spacecraft and autonomous…
Added 51 mins ago
Head of Corporate Development and IR
Nominal
NY
: the software and AI layer that hardware engineering teams use to simulate, test, manufacture, and operate the physical systems that keep the world moving, from spacecraft and autonomous…
Added 1 hour ago
CC
In Circuit Test Engineer II
CIRCUIT CHECK INC
Maple Grove, MN
- $36 to $43 USD / hour
3–5 years of ICT test engineering experience, including writing and debugging ICT software.
Added 1 hour ago
IS
Electronics Test Technician I/II
Intellisense Systems Inc
Torrance, CA
- $25.75 to $36 USD / hour
Support new product introduction (NPI), prototype builds, engineering evaluations, qualification testing, and transition of products into production.
Added 1 hour ago
SDE II EC2 Nitro, EC2 Nitro
Amazon
Santa Clara, CA
The EC2 Nitro local storage team is seeking an experienced Software Development Engineer to build virtualized, hardware-accelerated solutions for EC2 disk instances at global scale. Our…
Added 1 hour ago
Applied Scientist II, Foundation Model
Amazon
Sunnyvale, CA · SAN FRANCISCO, CA
Execute rapid, rigorous experimentation with reproducible results and solid engineering practices, closing the gap between sim and real environments.
Added 1 hour ago
Security Architect II
ICW Group
San Diego, CA

Prospex CRM

Senior Software Engineer, Custody

United States

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Job details

Posting language: English

Original job description

Location: Remote-friendly globally. Time-zone band UTC-1 to UTC+5 (meaningful Saudi hours overlap). Optional relocation to Riyadh. Reports to: Custody Platform Lead. Type: Full-time. Individual Contributor.

About us:

The company is the digital-asset custody and infrastructure platform for the GCC. We hold institutional crypto safely, settle transactions across chains, and expose all of that as a developer API and a regulated-grade institutional console.

The role:

You are a senior backend engineer with a custody and key-management background. You will be a foundational engineer on the company's custody platform, reporting to the Custody Platform Lead.

You will:

Ship production custody code across signing service, key management, chain integrations, and the transaction pipeline. Own a chain or a subsystem. Within 3 months you should own a meaningful surface end-to-end (a chain integration, a signing-service component, a key-rotation flow). Pair with the Custody Platform Lead and our in-house cryptography function on threshold signing, share generation, and key recovery flows. Write post-mortems when things break. We treat these as architecture-improvement opportunities, not blame exercises. Integrate new chains. Bitcoin, Ethereum and L2s, Solana, and an active onboarding queue. Engage in async written communication. Spec docs, PR descriptions, async design reviews.

Must-haves:

5-plus years of backend engineering, with the last 2-plus years on a custody platform or a key management system at a regulated entity. General fintech does not substitute.

Hands-on with at least one of:

HSM lifecycle (CloudHSM, YubiHSM, Ledger Vault, similar). MPC / TSS (Fireblocks-style, Sepior, ZenGo, Curv-style). Threshold signing schemes (GG18, GG20, FROST, CGGMP21, CMP).

Production experience with one or more of:

Bitcoin (UTXO model, PSBT). Ethereum (EIP-712, EIP-1559, account abstraction). At least one non-EVM Layer 1 (Solana, Sui, Cosmos SDK chain, similar). Reads Solidity, Move, or Rust well enough to integrate with new chains without hand-holding. Strong async written communication. Your PR threads, design docs, and intro reply are themselves a signal. English fluency.

Nice-to-haves:

Experience with travel-rule / FATF compliance integrations (Notabene, Sumsub, TRP, IVMS101). Authored or contributed to an EIP, BIP, or chain RFC. Audit-contest finalist on Code4rena, Sherlock, or Cantina. Familiarity with regulated-financial controls: dual-control, four-eyes, M-of-N approvals, SOC 2 evidence collection.

This is not the right role if:

Only frontend / dApp experience, no backend custody or key-management depth. "Crypto trader who codes." Algorithmic trading without custody experience. Anyone whose entire blockchain experience is a single hackathon, bootcamp, or DeFi side project. Currently subject to a non-compete blocking digital-asset custody for more than 6 months.

Stack:

Backend: Go primary. Some Rust, some TypeScript. Aurora Postgres and ClickHouse. Temporal for orchestration. Cryptography: in-house MPC stack (TSS-based), HSM integrations, multi-chain signing service. Chains: Bitcoin, Ethereum and L2s, Solana, active onboarding queue. Infra: AWS, Kubernetes, GitHub Actions CI, Terraform. Security posture: SOC 2 Type II in motion, SAMA-aligned, intent toward ISO 27001 and dual-control workflows.

Location, visa, relocation:

Location: Riyadh, open to Remote Opportunity. Time-zone band: UTC-1 to UTC+5 for meaningful Saudi-hours overlap. Relocation (optional): if the candidate elects to relocate to Riyadh, we’ll support sponsorship. Tax / payroll: KSA payroll for relocates. Contractor or Employer-of-Record for remote-international.

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