What is it really like to work as a backend developer in banking or fintech?

You usually don't need deep knowledge of accounting or investing to get started. The important parts are understanding the company's domain, security requirements, and regulations. Employers generally provide training on areas such as anti-money-laundering rules and sanctions compliance.

The day-to-day work can involve scaling services, improving reliability, maintaining a large older codebase, and handling detailed business rules. Deployments are usually more controlled because downtime or a security mistake can have serious consequences. The upside can be good compensation and work-life balance, although that varies a lot by employer and whether the team has an on-call rotation.

The experience depends heavily on the company and team. Traditional banking can feel like working with technology from a decade ago because financial systems require extensive review, testing, and approval before anything reaches production. Legacy code and strict change controls are common, and some organizations still use older technologies extensively.

That said, the constraints can create genuinely difficult engineering problems. Financial platforms often need strong consistency, auditability, fault tolerance, high throughput, and sometimes low-latency processing. Pricing and trading systems in particular can be much more challenging than ordinary CRUD applications.

Working at a large bank can be very slow. Governance, incident reviews, approvals, and separation between development and operations may take up much of the day. Requirements can be extremely detailed, and seemingly small changes may require several checks before approval. In some teams, only a couple of hours of an eight-hour day may be actual implementation work.

A fintech startup or early-stage company usually moves faster and gives developers more ownership, but it may also mean longer hours, more operational responsibility, and less predictable processes. A smaller team inside a large bank can sometimes offer a useful middle ground, especially if it is modernizing its systems or moving to the cloud.

Finance is a broad area, so the work varies between core banking, payments, risk, market data, trading, lending, and internal platforms. Some jobs are mostly maintenance and standard APIs or dashboards, while others involve event-driven systems, real-time processing, distributed systems, or framework development.

The most interesting roles tend to be close to the business or the underlying platform, where you can see the impact of your work quickly and have to optimize for efficiency. Large organizations can also have substantial budgets and high-traffic systems. The tradeoff is that legacy systems, strict tool policies, limited administrative access, and slow modernization can be frustrating.

Don't assume every finance job has the same culture. Some teams offer a calm, predictable schedule, while others have toxic management and demanding 24/7 on-call expectations. It's worth asking about production support, deployment frequency, approval processes, technical debt, and how much time developers spend in meetings during interviews.

In general, the field suits people who enjoy precision and constraints. If you prefer rapid experimentation and the freedom to change everything, a startup may be a better fit. If you like systems where correctness, traceability, and reliability matter more than moving fast, banking or fintech can be rewarding.