immutable

Software Engineer (Java Generalist)

posted by: spj_bot

Software Engineer (Java Generalist)

Location: US - Open to Europe if happy to overlap with EST

Compensation: $160K - $200K

Our firm has been retained by a high-growth, mission-driven technology company to find a world-class Principal Java Systems Engineer. This is not a role for "glue" engineers who connect off-the-shelf components; this is for the engineer who sees performance ceilings as a personal challenge and prefers squeezing 30% more throughput out of clean Java over renting 30% more cloud compute.

Our client is building a high-performance, publicly visible immutable ledger. In an industry where people "move fast and break things," this team operates like NASA: moving fast while ensuring correctness, performance, and efficiency are 100% right the first time. You will join an elite team where you aren't a cog in the machine—you are the architect building it.

Key Responsibilities:

Job Skills

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Blockchain Payments Engineer

posted by: spj_bot

Lead Blockchain Payments Engineer - Fiat Ramps & Financial Infrastructure

Location: London

On-site | Full-time

Compensation: Competitive

Our client is an elite team of builders operating at the intersection of fintech and high-scale crypto infrastructure. As a high-growth software organization, the company is responsible for developing the technology behind some of the largest crypto social networks and digital asset launchpads globally. The organization is defined by a philosophy of extreme talent density, rapid iteration, and technical ownership.

The Lead Blockchain Payments Engineer (Fiat Ramps) will serve as a core architect of the firm's financial infrastructure. This role is responsible for designing and scaling the services that power seamless fiat-to-crypto flows, real-time risk decisioning, and immutable financial records. Based in London, this is a full-time, in-person position for an engineer who thrives in high-throughput, low-latency environments and is passionate about building the future of global value transfer.

Key Responsibilities

Payment Orchestration & Integrations

Job Skills

social network bank systems languages key management rtp bank statement high performance circuit breaker experience design nice finance python best practices docker operations locking grafana node real time instrumentation iterate e open banking manage prometheus equity security policy operational safe financial transactions kubernetes automated API immutable integrations indexing terraform high throughput reliability integration data modeling low latency sar targeting reconciliation fault tolerant managed securely digital asset collaboration workflows blockchain operating financial integrity accounting chargeback risk financial drive features system design hygiene data auditability driven design networks apple distributed systems plaid cross functional collaboration redis rust event driven stripe analytics ledgers kms plumbing audit infrastructure scale typescript workflow applicable data
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Mobile Engineer (Flutter)

posted by: spj_bot

Mobile Engineer (Flutter/Dart) - Decentralized Trading Platform

Location: Remote - US or Europe remote. Must overlap with ET by 4 hours.

Compensation: $140K - $300K

We are a well-funded, innovative financial technology company on a critical mission: to enable anyone with a digital wallet to trade stocks, commodities, currencies, and crypto with unprecedented transparency. We are replacing the opaque, offshore brokerage model with a transparent, permissionless trading stack built entirely on-chain. Every transaction, deposit, and withdrawal is verifiable through open, auditable code. We have secured significant backing from top-tier institutional and crypto-native investors.

We are seeking a highly proficient Mobile Engineer to own and build our native mobile trading experience from the ground up. You will use Flutter and Dart to deliver a high-performance, cross-platform application (iOS and Android) that adheres to strict architectural standards and seamlessly integrates with our on-chain protocols.

Responsibilities:

Job Skills

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