Software Development Engineer (Amazon and Microsoft) Job Description

The Software Development Engineer (Amazon and Microsoft) title belongs to a specific operating model. At Amazon, where the title is documented in the company's own hiring guides, the person holding it is expected to own a service, not just write code for one. That means designing the change, building it, deploying it, watching it in production and answering for it when it breaks in the middle of the night.

Amazon spells out one rung of the ladder in the guide it publishes for SDE II candidates. An SDE II, the page says, will "contribute to your team's software, delivering features that span its life cycle," working with the team to design solutions that improve existing features and enable new ones. The same page says the engineer will "exercise autonomy and make trade-offs between feature development and operational work." That second sentence describes the daily tension of the job: every hour spent on a new feature is an hour not spent reducing alarm noise, paying down a fragile dependency or automating a manual deployment step.

Documentation is part of the role, not an afterthought. Amazon's guide says the SDE II documents the team's software, "including how it's constructed, tested, operated, and secured," and trains teammates on those points. It also says SDE IIs mentor and guide others and play a role in recruiting and interviewing for the team. An SDE's output, then, includes design documents, runbooks, review comments and interview feedback as well as code.

The principles behind the work

Amazon's Leadership Principles shape how SDE work is judged. The Ownership principle opens with "Leaders are owners," and says they think long term and do not sacrifice long-term value for short-term results. Dive Deep says leaders "operate at all levels, stay connected to the details," and audit frequently. For an engineer, those lines translate into concrete habits: reading the logs yourself during an incident, refusing a quick fix that hides a problem, and writing a design that names the failure modes instead of hoping no one asks.

Microsoft has put security at the top of the same list of trade-offs. In a May 3, 2024 message to employees, CEO Satya Nadella wrote that if employees face "the tradeoff between security and another priority, your answer is clear: do security," adding that in some cases this will mean prioritizing security above releasing new features or supporting legacy systems. For an engineer working on a Microsoft product, threat modeling, secret handling and patching are part of the definition of done.

What a week looks like

A typical week mixes focused coding, reviews of teammates' pull requests, a design review or two, and operational work: dashboards, alarms, tickets and deployment pipelines. On a rotation, the engineer holds the pager for the team's services. Larger changes start as a written proposal that peers and senior engineers critique before code is written. Interview loops and mentoring take the rest of the calendar. The mix depends on the team and the engineer's level, and senior SDEs also review other people's designs and work through cross-team dependencies.

As a rough guide, SDE candidates hold a bachelor's in computer science, software engineering or computer engineering, along with internships or project work that show production habits. The skills the SDE interview tests are concrete: data structures and algorithms, writing working code in at least one mainstream language such as Java, Python, C++, C# or Go, and designing a distributed system that holds up under load and partial failure.

How Amazon screens SDE II candidates

Amazon publishes its SDE II process in detail. After a candidate who meets the basic qualifications applies, there is an online assessment: 90 minutes for two technical questions, followed by 20 minutes of systems design scenarios and an 8-minute multiple-choice work style survey. Candidates who pass move to an interview loop, which the company describes as "four 55-minute interviews" with members of its software development community.

The coding rounds expect "syntactically correct code" with no pseudocode, and the guide names scalable, well-tested code among the main evaluation criteria, along with checking edge cases. At least one round covers system design, where the interviewer probes the candidate's choices and expects the candidate to ask questions to validate the design. The behavioral portion focuses on past situations that show the Leadership Principles, and Amazon states plainly, "We won't ask brain teasers." It recommends answering with the STAR method: situation, task, action and result.

Experience that carries weight

As a rough guide, entry-level SDE roles go to new graduates and engineers with up to two years of work, SDE II roles to engineers with roughly three to six years, and senior roles to people who have led multi-team designs. What separates candidates at each level is evidence of ownership: a service you ran in production, an outage you diagnosed, a design you defended in writing, a junior engineer you brought up to speed. Prepare several specific stories with measurable results before an Amazon loop, and expect follow-up questions that test whether you did the work yourself.

Certifications

No certification is required for the title. Engineers who build on AWS sometimes take the AWS Certified Developer - Associate or AWS Certified Solutions Architect - Associate exams, both awarded by Amazon Web Services, to show cloud fluency outside an employer's internal tooling. Neither replaces the coding and design rounds.

Skills to build before applying

Practice writing a two-page design document for a system you know: the problem, the proposed approach, alternatives considered, failure modes and how you would measure success. Learn to read a latency graph and a stack trace quickly. Get comfortable with code review as both author and reviewer. These habits match the work the role describes, and they give you material for the design and behavioral rounds.

BLS projects employment of software developers, quality assurance analysts and testers to grow 10 percent from 2025 to 2035, which the agency calls much faster than the average for all occupations. That projection covers the whole occupation, not the two employers on this page, and the recent record at Amazon and Microsoft shows how much the picture can move inside a single company.

Corporate cuts at both employers

On June 17, 2025, Amazon CEO Andy Jassy told employees that as the company rolls out more generative AI and agents, "we will need fewer people doing some of the jobs that are being done today, and more people doing other types of jobs." He wrote that the company expected this to "reduce our total corporate workforce" in the next few years as it gains efficiency from using AI across the company, and that Amazon had over 1,000 generative AI services and applications in progress or built. On October 28, 2025, Beth Galetti, Amazon's senior vice president of People Experience and Technology, announced an overall reduction in the corporate workforce of approximately 14,000 roles.

Microsoft made its own cuts in 2025. CNBC reported on July 2, 2025 that the company would cut less than 4% of its global workforce, about 9,000 employees, across teams, role types and geographies, after layoffs in May that affected around 6,000 people. Neither the Amazon message nor the CNBC report gives a count for SDEs, so treat these as signals about the employers, not counts of engineering jobs lost.

The tooling is changing under the title

The development environment itself is in flux. AWS has posted an end-of-support notice for the Amazon Q Developer IDE plugins, with support ending April 30, 2027, and points users who want similar capabilities to Kiro, an agentic coding tool that its site says is built and run by AWS. Kiro's page says its specs "capture what you meant before code is written and verify results after." That workflow puts weight on a skill the SDE role already calls for: writing down precisely what a system should do and how it might fail.

Security as a career requirement

At Microsoft, security has moved into how engineers are evaluated. A September 23, 2024 progress report on the company's Secure Future Initiative, written by Charlie Bell, executive vice president of Microsoft Security, said security is now a core priority for all employees and will be included in their performance reviews. The same report said Microsoft had dedicated the equivalent of 34,000 full-time engineers to the initiative since it began. An SDE who can show secure design work, credential hygiene and fast patching has evidence that maps directly to that review criterion.

Where the role leads

Past the senior level, an SDE can keep going on the technical side, setting architecture across several teams, or move into managing a team of SDEs. Engineers also move into adjacent work such as site reliability, security engineering or applied science. The common thread in all of them is the record the SDE years produce: services owned, incidents handled, designs written and engineers trained. Keep a written log of that record as you go; it is the material you will draw on in promotion packets and interview loops.

Dear Hiring Team,

I am applying for the Software Development Engineer II opening on your payments reconciliation team. For the past four years I have been an engineer at Harbor Ledger, a mid-size fintech, where I own the service that matches incoming bank settlement files against our internal transaction records.

When I took over that service it ran as a nightly batch job that failed silently about once a week, and the on-call engineer found out only when finance staff filed a ticket the next morning. I wrote a design document proposing a streaming rewrite, laid out two alternatives and the failure modes of each, and walked the team through the trade-offs in a design review. We chose an incremental path: first adding alarms and a dead-letter queue to the existing job, then moving one bank file format at a time onto the new pipeline. Silent failures stopped within the first month, and the full migration finished two quarters later with no missed settlements.

I take operations seriously because I carry the pager. I rewrote our runbook after an outage in which a certificate expired on a vendor endpoint, added an expiry alarm for every external certificate we depend on, and now run a monthly game day where a newer engineer handles a staged failure while I observe.

I also review code for three teammates and have mentored two new graduates through their first production launches. I enjoy interviewing and have sat on more than forty loops.

I would welcome the chance to bring that mix of design, ownership and teaching to your team.

Sincerely, Priya Ramanathan