We are building a high-performance Payment
Hub and orchestration platform that connects merchants with multiple
payment gateways, processors and acquirers. As a Rust Engineer, you will work
on the core systems behind it: transaction processing and routing, gateway
integrations, asynchronous workflows and production reliability. You own
problems end-to-end instead of working on isolated modules.
● Core payment services: high-throughput, low-latency transaction processing,
authorization/capture, refunds and reversals in Rust.
● Routing and decision engine: configurable routing rules, success-rate based selection, fallback
and cascading retries across gateways and acquirers.
● Provider connectors: adapters and abstraction layers that hide provider-specific APIs,
auth schemes, response formats and error codes.
● Transaction state machines: explicit, auditable lifecycle management that stays correct under
timeouts, duplicate callbacks and partial failures.
● Idempotency and consistency: duplicate-request handling and idempotent distributed operations
that never double-charge or double-refund.
● Async and event-driven
pipelines: webhook delivery, reconciliation feeds
and background workflows on queues/streams.
● Internal and merchant-facing
APIs used by merchants, internal teams and payment
providers.
- Own features across the full
cycle: design, development, testing, deployment, monitoring and debugging in
production.
- Run root-cause analysis for
latency spikes, transaction failures and incidents, and ship permanent fixes
instead of patching symptoms.
- Profile and optimize CPU,
memory, I/O, network and database usage; remove bottlenecks before they become
outages.
- Build observability into everything you ship:
structured logs, metrics and traces tied to transaction IDs.
RequirementsWhat You Bring (Must-Have)
● 3–6 years of backend
engineering with professional Rust experience in production.
● Solid command of ownership and
borrowing, lifetimes, traits and generics, error handling, memory management,
and async/concurrent Rust.
● Experience building REST APIs
or distributed services, and sound database fundamentals (PostgreSQL ,
Cassandra and Redis preferred: transactions, isolation, indexing, query
tuning).
● Good grasp of Linux and
networking (TCP, HTTP/TLS, DNS, timeouts, connection pooling).
● Strong debugging and
problem-solving skills, and the habit of reasoning about failure modes first.
● Tokio, Axum or Actix-web
● Redis, Kafka / RabbitMQ / NATS
● Docker and Kubernetes; GCP or
AWS
● OpenTelemetry, Prometheus,
Grafana, distributed tracing
● Go or Python for tooling and
integrations is an added advantage
● Open-source contributions or
performance write-ups
● Payment gateways, orchestration
and acquirers
● Authorization / capture,
refunds / reversals
● Webhooks and reconciliation
● Idempotency and retry design
● HMAC, AES, API authentication,
PCI-DSS concepts
● UPI / card network flows
- Think deeply about the problem
rather than only implementing the ticket.
- Are comfortable working close
to the infrastructure and the metal when needed.
- Care about correctness and
reliability when money is moving.
- Enjoy chasing down a hard
production bug to its root cause.
- Learn unfamiliar parts of a system quickly and
take ownership.
Skills Required
- 3-6 years of backend engineering experience
- Professional Rust experience in production
- Knowledge of Rust ownership, borrowing, lifetimes, traits, generics, error handling, memory management, and asynchronous/concurrent programming
- Experience building REST APIs or distributed services
- Database fundamentals including transactions, isolation, indexing, and query tuning
- PostgreSQL, Cassandra, and Redis experience
- Knowledge of Linux and networking, including TCP, HTTP/TLS, DNS, timeouts, and connection pooling
- Strong debugging and problem-solving skills
- Tokio, Axum, or Actix-web experience
- Redis, Kafka, RabbitMQ, or NATS experience
- Docker and Kubernetes experience
- GCP or AWS experience
- OpenTelemetry, Prometheus, Grafana, or distributed tracing experience
- Go or Python for tooling and integrations
- Open-source contributions or performance write-ups
- Payment gateway, orchestration, or acquirer experience
- Experience with authorization, capture, refunds, or reversals
- Experience with webhooks and reconciliation
- Idempotency and retry design experience
- Knowledge of HMAC, AES, API authentication, or PCI-DSS concepts
- Knowledge of UPI or card network flows
What We Do
iServeU is a SaaS company offering embedded financial infrastructure for banking, issuance, and payment as a service. It describes itself as a modern banking infrastructure provider in the APAC region, empowering financial enterprises with embedded fintech solutions. The company provides software-based infrastructure that integrates core financial capabilities, helping institutions deliver banking and payment services through a unified technology platform.
