backend engineer
Posted Today by Randstad
£500 Per day
Undetermined
Hybrid
city of london, london
Summary: The Senior Backend Engineer role focuses on joining a critical API team within a global fintech environment, responsible for high-throughput backend services and real-time payment routing. The position involves owning complex problems from day one and directly impacting payment acceptance rates for leading brands. The role is contract-based with the potential for permanent conversion. It requires expertise in Go and/or Java, along with experience in high-volume distributed systems.
Key Responsibilities:
- Join a critical API team responsible for high-throughput backend services.
- Own complex problems end-to-end from day one.
- Impact payment acceptance rates for global brands.
Key Skills:
- Demonstrable seniority as a backend engineer owning complex services in production.
- Production-level expertise in Go and/or Java.
- Experience building or maintaining high-volume, low-latency distributed systems.
- Strong API design skills.
- Hands-on experience with AWS cloud-native deployment.
- A systems-thinking approach to performance, correctness, and failure modes under load.
- Background in payments, fintech, or financial services is highly advantageous.
Salary (Rate): £500 daily
City: London
Country: United Kingdom
Working Arrangements: hybrid
IR35 Status: undetermined
Seniority Level: Senior
Industry: IT
Title: Senior Backend Engineer (Go/Java) - Global Fintech Contract
Location: Central London (Hybrid, 3 days in-office)
Engagement: Contract with potential to convert to permanent
Rate: Competitive
The Role: You will join a critical API team responsible for high-throughput backend services and real-time payment routing decisions. This is foundational infrastructure where your work directly affects payment acceptance rates for some of the fastest-moving brands globally. You will own complex problems end-to-end from day one.
What You Will Bring:
- Demonstrable seniority as a backend engineer owning complex services in production.
- Production-level expertise in Go and/or Java.
- Experience building or maintaining high-volume, low-latency distributed systems.
- Strong API design skills.
- Hands-on experience with AWS cloud-native deployment.
- A systems-thinking approach to performance, correctness, and failure modes under load.
- Background in payments, fintech, or financial services is highly advantageous.
How to apply
This role is being filled exclusively through Randstad Digital. To be considered, please send your CV to Yogeshwari . sen @ randstaddigital. com along with a brief note on your experience with Go/Java and high-volume distributed systems.
Randstad Technologies is acting as an Employment Business in relation to this vacancy.