Software Engineer (Backend)

Flourish Ventures; Greater London; On-site; GBP 55,000 - 75,000; Full time

Benefits offered by this job

Private Healthcare

Flexible vacation policy

Employee stock ownership (ESOP)

Wellness days

Job summary

Dormont Manufacturing Co is looking for a Software Engineer in London to contribute to building a robust backend infrastructure for financial systems. You will work closely with a small team to design, implement, and optimize backend services that ensure reliability and performance.

As an ideal candidate, you should bring at least 3 years of backend experience with a focus on distributed services, a strong interest in Rust, and collaborative skills for working within a dynamic environment.

Qualifications

• 3+ years of experience building backend systems.
• Commercial experience in backend or systems engineering.
• Genuine interest in working with Rust.

Responsibilities

• Design and implement backend systems.
• Ensure scalability, performance, and reliability.
• Maintain security and compliance in engineering.

Skills

Backend systems design & implementation

Experience in strongly typed languages (Rust, Go, Java, Kotlin, C++)

API design and integration

Testing mindset and familiarity with CI/CD

Clear communication skills

Tools

PostgreSQL

Docker

Kubernetes

Job description

Software Engineer (backend)

Location: London or New York - in office 4 days a week

About Lorum

Global payments are not broken. Incentives are. Clearing has been deprioritized inside balance sheet driven institutions whose models rely on lending and interest. When liquidity takes priority over settlement, payments slow and certainty drops. The same financial institutions that distort clearing as providers are disadvantaged as users. They are forced into fragmented setups, inconsistent rails, duplicated compliance, and unpredictable timelines. Stablecoin shortcuts and treasury pooling treat symptoms at the surface, but almost no one is rebuilding the underlying infrastructure in each market.

Rebuilding clearing from the ground up

We are rebuilding clearing as its own specialist function. We act as a clearing and transaction banking partner for regulated institutions, with treasury built into the core so liquidity, settlement, and reconciliation sit in one controlled system.

Our platform unifies global and local licenses, direct central bank clearing, and access to domestic rails. We allow clients to open named customer accounts in every market we operate, collecting funds and paying out through a single network while retaining full ownership of their customer relationships. Market expansion becomes as simple as one correspondent relationship, not hundreds.

Why Lorum

Joining Lorum means contributing to one of the most ambitious clearing infrastructure projects in global finance. You will help shape settlement systems that perform under real regulatory standards and institutional volumes. You will build for regulated institutions that rely on precision, predictable timelines, and regulatory integrity. It is about working across currencies, markets, and supervisory frameworks to deliver reliable, final settlement.

Role purpose

We are looking for an experienced backend engineer to join our team and help build the foundational infrastructure. You’ll be joining a small, cross-functional team focused on shipping real value quickly and building systems that are observable, reliable, and designed to evolve.

This role is ideal for someone who enjoys working in fast-moving environments, thrives in ambiguity, and cares deeply about building high-quality backend systems that solve real-world problems. We’re particularly looking for engineers with strong experience in distributed systems and an interest in working with Rust.

We don’t expect you to have experience with our exact stack, but we do expect you to bring deep engineering expertise, sound judgment, and a pragmatic approach to problem solving.

Key Responsibilities

• Backend systems design & implementation

• Scalability, performance & reliability

• Security & compliance aware engineering

• Collaboration & delivery

• Tooling, testing & continuous improvement

Ideal candidate

• Must-Haves

• 3+ years of experience building backend systems in a strongly typed language (e.g. Rust, Go, Java, Kotlin, C++, or similar).

• Commercial experience in backend or systems engineering, working on distributed services or APIs.

• Genuine interest in working with Rust day‑to‑day (prior Rust experience or demonstrable learning is important).

• Solid understanding of backend fundamentals: concurrency, data modelling, transactions, reliability, and observability.

• Experience designing and consuming APIs (REST/gRPC/GraphQL) and integrating with other services and data stores.

• Strong testing mindset and familiarity with CI/CD workflows.

• Clear communication skills and a collaborative approach to working with Product, Operations, and other engineers.

• Nice-to-Haves

• Hands‑on experience with Rust in production or substantial personal/OSS projects.

• Experience in fintech, payments, banking, trading, or other financial infrastructure domains.

• Familiarity with event‑driven architectures, message queues, and stream processing.

• Experience with PostgreSQL (or similar relational databases) and data‑intensive workloads.

• Experience running services on a major cloud provider (e.g. AWS, GCP) and with containerisation/orchestration (e.g. Docker, Kubernetes).

• Exposure to regulated or high‑assurance environments and the constraints they introduce.

Benefits

• Opportunity to travel (if applicable)

• Flexible vacation policy

• Private Healthcare

• Employee stock ownership (ESOP)

• Flexible working and autonomy

• Pay it forward days - we offer 2 annual pay it forward days where you can take time to volunteer for a charitable cause that is important to you.

• Wellness days - we believe you can only work your best when you feel your best, and we know working at Lorum is intense, so we offer 3 wellness days every quarter where you can take time to re‑energise.