You will build the core financial engines of an autonomous banking platform - ledgers, transaction processors and reconciliation systems that move and record value at global scale.
Responsibilities
Design and implement deterministic, event‑sourced ledger and transaction engines
Build high‑precision interest, pricing and reconciliation engines
Engineer distributed systems focusing on correctness, consistency and invariants
Senior Software Engineer at Fis
Design for scale: concurrency, throughput, partitioning and replication
Own services end‑to‑end from design through production operations
Integrate AI tooling into development, debugging and operational workflows
What you bring:
Strong proficiency in Go or Rust
Kafka and distributed SQL database experience
Experience building distributed systems and event‑driven architectures
Deep understanding of concurrency, consistency and fault tolerance
Hands‑on production ownership and strong debugging skills
Comfort working in banking or other highly regulated environments
Added bonus if you have:
Formal methods or strong testing discipline
AI‑native development workflows
Experience with financial systems or ledgers
What we offer you:
A work environment built on collaboration, flexibility and respect
Competitive salary and attractive range of benefits designed to help support your lifestyle and wellbeing
Varied and challenging work to help you grow your technical skillset
Privacy Statement
FIS is committed to protecting the privacy and security of all personal information that we process in order to provide services to our clients. For specific information on how FIS protects personal information online, please see the Online Privacy Notice .
Sourcing Model
#pridepass
Benefits
Performance bonus
Additional Information
Are you curious, motivated, and forward‑thinking?
At FIS, you'll work on some of the most complex and impactful challenges in modern banking, helping build next‑generation, AI‑enabled platforms used by financial institutions worldwide. We foster an environment that values ownership, autonomy, and end‑to‑end responsibility, where engineers are encouraged to take initiative, make meaningful technical decisions, and ship solutions directly into production. We believe in open, collaborative, and ownership‑driven teams with a strong focus on real‑world impact.
Fis · Lndn 25 Walbrook Fl5&6, UK